WO2006097319A2

WO2006097319A2 - Measuring method, support device and measuring device

Info

Publication number: WO2006097319A2
Application number: PCT/EP2006/002459
Authority: WO
Inventors: Klaus Michael Lass; Carlos Machado
Original assignee: L.M.F. Fahrzeugtechnik Gmbh
Priority date: 2005-03-18
Filing date: 2006-03-17
Publication date: 2006-09-21
Also published as: WO2006097319A3

Abstract

The invention relates to a support device for a measuring device, comprising a measuring arm (16) that can be displaced three-dimensionally in order to measure a physical measuring object (15). Said support device (11-14; 500; 700) can be positioned by means of a setting unit, which is located on the measuring arm, to provide at least one support point (32-35; 736), at which or on which the measuring object can be placed during the measuring process. The invention also relates to a measuring device (10) and a measuring method. According to the invention, the support device is equipped with at least two support feet (37; 200), each having a head end (30; 30') that corresponds with the setting device (26) in such a way that the support feet can be positioned on a base surface (36) of the measuring device with the aid of the setting unit, in addition to a coupling part (38; 538; 738) comprising coupling units (91; 591, 791) for the head ends of the support feet. The coupling part (38; 538; 738) can be mounted on the support feet once the latter have been positioned, thus providing the support point or points (32-35; 736).

Description

Measuring method, supporting device and measuring device

The invention relates to a support device for a measuring device with a spatially adjustable measuring arm for measuring a physical object to be measured, wherein the support device can be positioned by means of a arranged on the measuring arm default device for providing at least one support point, on or on the subject during a Surveying can be arranged. The invention further relates to a measuring device and a measuring method.

Such a measuring device or a corresponding measuring method are known, for example, from DE 196 40 579 A1 and DE 196 48 864 C2. The supports according to the measuring device according to DE 196 40 579 A1 are vertically adjustable and each provide punctiform support surfaces for the measurement object. Thus, it is possible, for example, to position a measurement object with curved surfaces on the support points. However, only two degrees of freedom are present, namely on the one hand an adjustment of the respective supports on the base surface of the measuring device by means of the measuring arm and also a height adjustment of the support points. A slightly greater flexibility provide supports according to DE 196 48 864 C2. These supports have two hingedly connected legs, so that also inclined support points for the measurement object can be adjusted. In the known measuring devices or support devices, however, it is disadvantageous that the individual support points are only mechanically limited and the flexibility for setting the support points is low.

It is therefore the object of the present invention to provide devices and a method with which mechanically loadable support points for a measurement object can be provided as flexibly as possible in space.

To solve the problem is provided in supporting device of the type mentioned above, that it has at least two supporting feet, each with a corresponding with the default head, so that the support feet are positioned by means of the default device on a base surface of the measuring device that they have a coupling part Coupling has i5 facilities for the head ends of the support legs, so that the coupling part after the positioning of the support legs on the support legs is mounted, and that the coupling part provides the at least one support point. Furthermore, a support device according to the invention for such a measuring device and a measuring method according to the invention for solving the problem are provided.

A basic idea of the invention is first to position individual support feet and then to arrange a coupling part on these support feet which couples the support feet together.

25 The coupling part provides the support point for the measurement object. By coupling several support legs is the. mechanical load capacity of the support device larger. Furthermore, the support points can be set exactly because the support feet are first prepositioned before the coupling part to the

3o support feet is mounted. A spatial positioning and Adjustment of the appropriately articulated and / or flexible support feet thus falls easily.

A preferred embodiment of the invention provides at least three support feet, which allows a high mechanical load capacity 5 at the same time great spatial flexibility for the establishment of the support point. Furthermore, the coupling part is mechanically not determined in three support areas.

At the head ends, many embodiments are conceivable. For example, the head ends may be spherical or roller-shaped. Polygonal surfaces are possible. The head ends may have screw ends or detents. The coupling devices on the coupling part are configured correspondingly, that is to say they have, for example, spherical or calotte-shaped receptacles, grooves for cylinder-shaped head grooves, screw receptacles or screw bolts and latching means for engaging head ends designed as detents.

Spherical head ends have the advantage that the respective distance from the ball surface to a center of the ball is the same from all sides of the ball, so that

20 calibration of the measuring device is an optional, not essential measure. However, a calibration described below with, for example, a calibration measuring device is, for example, different, for adaptation to different types of head ends.

25 seen default facilities advantageous.

The reverse design is also conceivable, namely, that the head ends of the support legs recordings, for example, kalotten- fδrmige recordings have. The coupling devices of the coupling part then comprise corresponding projections, eg 3o ball heads. The coupling devices may include, for example, claws, with which the head ends are clamped in a receptacle of the coupling device. The claw expediently has a contour at least at one region which correlates with an outer contour of the head end, for example a hollow ball contour or a hollow cylindrical contour for a rod-shaped section of a head end. The claw may be fixable by clamping, by a screw or the like. Expediently, the claw forms an angle, one leg of which is screwed to one side of the coupling part and the other leg of which protrudes under the coupling part for receiving. The coupling part is designed, for example, as a plate.

The claw is expediently assigned a spring arrangement in order to tension it in a position fixing the head end. This makes the installation of the claw easy. For this purpose, expediently also a magnet can be provided.

A magnet can expediently also serve as a positioning aid and be arranged, for example, on a head end or on a coupling device of the coupling part. Thus, the coupling part can be easily positioned and mounted at the head ends. With a sufficiently large magnetic holding force, it is even conceivable that already the magnetic coupling of the coupling part with the support feet for bi-fertilizing a mechanically strong support point sufficient.

An advantageous embodiment provides that the coupling part is arranged on a movable staging foot. The coupling member may be fixed or detachably attached to the Bereitstellungsfuß. With the help of the Zustußfußes the coupling part can be adjusted relative to the at least two support feet, previously with the help of the default device the measuring arm are already prepositioned. The deployment foot is a kind of assembly aid.

The staging foot and / or the support feet are expediently articulated and / or flexurally flexible and / or longitudinally adjustable. It will be understood that any combination of such support feet and stand feet is conceivable.

The dome part is advantageously pivotally or ball joint articulated to the Bereitfußfuß. Thus there are many degrees of freedom for positioning the dome part.

It is preferred if at least one of the support feet and / or the supply foot at least two Verstell- degrees of freedom are present. These adjustment degrees of freedom can be provided, for example, by the free positionability of the respective foot on a substrate and / or by length-adjustable sections and / or by joints, in particular rotary or ball joints.

A preferred embodiment of the invention provides that the support feet and / or the Zustußfuß are articulated feet. These joint feet have expediently at least two rotationally or ball-jointed legs connected. The legs can be positioned obliquely with respect to the base surface of the measuring device, which facilitates the adjustment of the support feet or the supply foot. It is preferred if rotational or ball joints are additionally present at the respective ends of the limbs, so that the freedom in setting up the support feet or the provisioning foot is great.

Advantageously, the head end of a support leg according to the invention is formed by a head part that by means of a Rotary joint, a ball joint or a Längsverstellme- mechanism is arranged on the respective support leg. Also on the foot side, it is advantageous if hinges or ball joints are present on the support legs or staging feet. A preferred embodiment provides that the foot parts are interchangeable. For example, foot parts may be provided with screw means for screwing on the base surface, magnet arrangements for magnetically holding on the base surface, suction means for holding by means of negative pressure, clamping means for clamping or the like.

A preferred embodiment of the invention provides that the at least two support feet are coupled together by a common foot, for example a stator plate. Also, the Bereitfußfuß is advantageously attached to this footboard. Also a combination of a single

Stützfußes with a Bereitstellungsfuß at a common foot is conceivable.

The provisioning foot and / or the support feet are expediently fixable by means of a single actuating handle. The actuating handle fixes joints of the respective feet sequentially, in groups or simultaneously. The joints are clamped, for example. As a result, the installation or determination of the support feet and the Bereitsetzfußes easily.

The Zustußfuß can increase the stability of the support device according to the invention in accordance with mechanically resilient design.

The at least one support point is expediently formed by the coupling part. It is also conceivable to arrange a support part on a coupling part, which forms the support point. Furthermore, it is possible that a plurality of support points are present on a coupling part. The support points may have different configurations, for example spherical or flat bearing surfaces, receiving openings for receiving the measurement object or a projection of the measurement object, projections which engage in a correlating receiving opening on the measurement object or the like. Conveniently, a respective support member on the coupling part interchangeable, so that the adaptation to different support conditions or the adaptation to measuring objects is facilitated.

Conveniently, the support surface projects obliquely to a plane defined by at least two, advantageously three, coupling devices, or a support plate of the coupling part. The support surface is advantageously arranged on a projection or in front of a plate of the coupling part projecting element. The support surface is e.g. a tilted cylinder. These measures each independently allow, for example, a tangentially inclined supporting surface or a measuring object lying tangentially thereon, e.g. a disc of a motor vehicle.

A high flexibility is given in an embodiment of the invention, in which the support points is formed by a three-dimensionally deformable support surface. The support surface may be formed, for example, by a chemical material that cures and provides the corresponding support surface. Furthermore, a support pin arrangement is advantageous with which a three-dimensional support surface is adjustable. The support pins are clamped, for example, if they have assumed a predetermined by the default setting on the measuring arm position, that is, the support surface has a corresponding three-dimensional structure or contour. If the coupling part is already mounted on the support feet positioned according to the invention, its support part can be finely positioned, for example, by means of a linear guide and / or a rotary bearing. For this purpose, too, it is expedient for the measuring arm to specify the respective position of the supporting point.

The presetting device of the measuring arm is expediently replaceable, so that, for example, a presetting device can be arranged on the measuring arm, which is adapted to the contour of the respective support point to be set or of a head end. This shows an advantage of the invention: to set up the support devices, a default device can remain on the measuring arm, which is adapted to the head ends of the support feet. With this default device all support feet can be set up, provided they have the same head ends, which is advantageous. The coupling part then provides the support contour required individually for the measurement object.

The measuring device according to the invention has positioning means for positioning the presetting device at the positions of the head ends. It is conceivable to store these positions, for example in a memory of the measuring device, so that the measuring arm can approach the positions for the head ends.

It is preferred if the positions of the support points are configured or programmed at the measuring device. The positioning means then calculate, based on the positions of the support points, the positions of the head ends of the support legs of a support device, which later provides the support point. The positioning means transform, for example the coordinates of the supporting point to be submitted to the coordinates of the head ends of the support feet.

The positioning means may e.g. be designed as a software module, which in itself constitutes an independent invention.

Another inventive aspect, which in itself forms an independent invention, relates to a support device for use with a measuring device with a spatially adjustable measuring arm for measuring a physical measuring object with in particular at least one curved surface, wherein with a arranged on the measuring arm default device with a Definition surface at least one support point can be specified, on or on which the measurement object is located during a survey, as well as equipped with the support device measuring device and a measuring method. In the supporting device is provided that it has at least one articulated foot with at least two pivotally or ball-jointed legs, that the at least one articulated foot is positioned with a foot at its lower end on a base surface of the measuring device that a support member for placing the DUT at an upper end portion of the support device by means of the at least one joint foot is spatially substantially freely adjustable to the at least one support point Vorga- direction adjustable so that the support member can form the at least one support point, and that the support device is fixable.

The articulated foot has a pivot joint or a ball joint between the legs and is thus spatially freely adjustable or configurable. Even if the support device on the base surface or reference surface of the measuring device already po- is positioned, for example, in the X or Y direction, the support member is not only vertically, ie in the Z direction, but also horizontally, ie in the X and / or Y direction by appropriately adjusting the at least one joint 5 foot spatially adjustable. As a result, the device of the support device is very easy. It is an optimal adjustment and alignment of the support device possible. For example, it is thus possible that even with an inclined, ie not horizontally oriented definition surface of the lo predetermining device that support member in the corresponding

Oblique position can be approached so to speak to the definition surface, so that, for example, a normal of the definition surface substantially corresponds to a normal of a support surface of the support member.

A joint foot can also have more than two legs, each of which is expediently connected to one another in an articulated manner.

It is particularly preferred that a plurality of joint feet in the manner described above in the support device available

20 are coupled to each other at its upper end by a coupling part. The coupling part is for example a separate component which is fixedly or detachably coupled to the joint feet. It is also possible that the coupling part is formed by the support member. It is appropriate that the

25 Steering feet each have separately on the base surface positionable foot parts. However, it is particularly preferred if the joint feet are coupled by a common foot part. By way of example, this foot piece is a stand plate on which the lower ends of the joint feet are fastened.

3o are xed, for example, clamped, fixed by magnetic force or the like. At the lower ends of the Steering feet, near the coupling foot part, are advantageously provided joints.

To improve the articulation of the joint foot or the support device as a whole, it is expedient that a lower leg of the joint foot or the joint feet is articulated by means of a rotary joint or ball joint to the foot part. Also at the upper end, i. on the upper leg of the respective joint foot, it is expedient to provide a rotary joint or ball joint, with which the support member or the aforementioned coupling part is articulated.

In principle, however, is also a variant of the invention, in which a lower leg of a joint foot forms the foot part or is rigidly connected to the foot part. It is also possible that an upper leg of a joint foot forms the support member or is rigidly connected to the support member. However, it is advantageous in the two alternatives mentioned above if at least two joints, advantageously ball joints, are provided between the support part and the foot part.

The legs of the joint foot are expediently positioned obliquely with respect to the base surface.

The foot part advantageously has fixing means for fixing on the base surface of the measuring device. By way of example, a plurality of variants, also possible in combination with one another, are proposed as fixing agents:

For example, a screw device, for example a screw, a groove arrangement or the like, for screwing or clamping fixation on a substrate, in particular on the base surface, may be provided. Also a magnet arrangement for Magnetic holding or a suction device for holding on the ground by means of negative pressure are advantageous. It is also possible to firmly mount the foot part to a stator plate or that the foot part forms a stator plate. This stator plate is expediently so heavy that it remains reliable at the respective positioning. It is also possible to provide a clamping device for clamping on the ground.

The foot can be fixed or interchangeable attached to the respective Gelenkfuß.

To fix the joint foot, it is expedient that a single actuating handle fixes as many as possible, expediently all joints of the joint foot. This simplifies handling. It is advantageous that the joints can be fixed sequentially by means of the actuating handle, for example a clamping screw or the like. Thus, all joints of the joint foot are fixed one after the other. It is understood that a group-wise fixation is advantageous, for example, each two or more joints are fixed simultaneously, but the other joints remain mobile. Each joint may also be associated with a separate fixing actuating handle.

The support member advantageously has a spherical bearing surface. The respective distance from the ball surface to a center of the support member is the same in each case from all sides of the ball. This can be omitted a calibration of the measuring device, although a calibration is nevertheless useful in some applications.

It goes without saying that a flat bearing surface of the support part can also have advantages, for example, if that respective measurement object should be placed flat. As a result, the load on the test object at the respective support point or support point is reduced.

The free positioning of the support device according to the invention also makes it possible to position a receiving opening either on the support part or on the measurement object in a simple manner relative to one another. The support member has, for example, a receiving opening for receiving the measurement object, in particular a pin-like or projection-like part of the measurement object. It is also possible that the support part has a projection, e.g. a pin, which penetrates into a receiving opening on the measurement object when it is placed on the support device or on the support devices of the measuring device for measurement purposes. This support pin on the support device may for example be cylindrical, conical or the like. The outer contour of the projection is advantageously round, with polygonal contours are useful.

The presetting device expediently has a definition surface which correlates with the respective support contour of the support part for specifying the support point, e.g. a hollow-spherical or a planar definition surface, a receiving opening for a projection on the measurement object or the like.

The support member advantageously has a three-dimensionally deformable support surface. This support surface may for example be formed by a deformable mass, which advantageously hardens chemically. However, it is also advantageous that a support pin arrangement as a whole forms a resulting three-dimensional support surface. The support pin arrangement includes, for example, several in the same Direction oriented support pins that are adjustable in a common adjustment and then fixed.

The degrees of freedom in the adjustment of the support device or in the positioning of the support device are increased by the fact that the support device expediently has at its upper end a linear guide for the linear adjustment of the support part. It is understood that a swivel mount, a rotary mount or the like for pivotal or rotational adjustment of the support member with respect to the joint foot or the joint feet can be advantageous.

The joints of a joint foot expediently have two degrees of freedom of adjustment. For example, you can use ball joints or a joint assembly with two swivel joints whose axes of rotation are transversely, in particular at right angles to each other.

The positioning of the support member or a head end of a support leg before mounting the above-mentioned coupling part relative to the already prepositioned default device is facilitated by the following measures. For example, on the support member and / or on the default device

There may be suction means sucking the respective other part into position. However, a variant in which magnetic means serve as a positioning aid is particularly preferred. For example, the support part, at least partially, have magnetic properties and, as it were, can latch onto the predefinition device located at the positioning location or support point location. Then, the support device is fixed, ie their hinges are set in the respective position. The default device then releases the respective support point, ie it moves away from the support part, which then removes the support point for placing or applying the measuring point. Object forms. The magnetic means can be formed by permanent magnets, but expediently also by electromagnets. For example, in the default device, an electromagnet is present, which is activated during the placement process 5 or positioning operation of the support device and is deactivated to release the respective support point.

A further aspect, which in itself constitutes an independent invention, relates to a calibration according to the invention with a measuring device having a spatially adjustable measuring arm for measuring a physical test object with in particular at least one curved surface, with at least one support device for forming a support point on which or on which the measurement object is located during a measurement, with a predetermining device arranged on the measuring arm and positionable with the i5 measuring arm with a definition surface for specifying the support point, so that the at least one support device is adjustable toward the definition surface, until a support surface of the at least one Support device for forming the support point or a head

2o de a support foot at the definition surface at least partially rests. The further aspect further relates to a calibration method for calibrating a measuring device. The measuring device and the calibration method allow the use of default devices with definition surfaces

25 most diverse geometry. For this purpose, it is provided that the measuring device has a calibration measuring device, which is connected to a control device of the measuring device and which, when scanning the definition surface of the predefined device mounted on the measuring arm, measures measured values for calibration

30 sends the measuring device to the control device. It should be emphasized that the measuring device expediently the above-mentioned articulated and advantageous coupling parts aufwei- has support devices, but that other supports can be used. The measuring device "learns" so to speak by means of the calibration measuring device support surfaces and definition surface of different geometries 5 and is calibrated for these geometries.

Furthermore, it is possible that with the default device head ends of support devices can be set up, on which later a support part is mounted to form a support point, on or on which the measurement object lies during a calibration. The support member couples, for example, several feet of a support device. The measuring device can be used for a presetting device suitable for the respective head end, e.g. a presetting device with a roller-shaped or dome-shaped definition surface, to which the above-mentioned instructions are calibrated.

A measuring device or a calibration method for a measuring device are in themselves known e.g. known from the patent application DE 10 2004 021 004.7. Before the measurement object can be placed on the at least one support device, is

20 this set up. The measuring arm positions the presetting device at the support points to be set up, where in each case a support device is positioned and set up. The support device has, for example, a support pin arrangement which has individually adjustable support pins. The support

Pins are set by the presetting means relative to each other and relative to a post for the support pin assembly. The support pin arrangement forms, for example, a three-dimensional support surface. The support device then forms the support point at which the object to be measured is later

30 measurement can be placed by the measuring device. During the subsequent measurement, a measuring arm measuring device for scanning the measuring object attached to the measuring arm.

The presetting device and the measuring arm measuring device must be calibrated, i. they must be set up at a reference point of the measuring device. For calibration, e.g. a calibration device provided with a calibration ball on which the measuring arm measuring device and the default device can be calibrated. Thus, for example, geometrical differences between the measuring arm measuring device and the presetting device, mounting tolerances when mounting the respective devices on the measuring arm and the like are detected so that the measuring arm measuring device and the presetting device are uniformly calibrated to the reference point of the measuring device.

The known calibration device in the form of the calibration sphere corresponds to the shape of the definition surface of the default device, which accordingly has to be necessarily concave. Although this concave shape of the definition surface is expedient for setting up a spherical or punctiform support point. However, there are applications in which also differently shaped definition surfaces, such as definition surfaces with a receptacle or a projection, cylindrical definition surfaces or the like for establishing corresponding support surfaces are appropriate. In order to calibrate the default devices designed in this way, one would have to use a calibration device with suitable geometry in each case. On the other hand, it is very advantageous to use a spherical or cube-shaped calibrating device, as described, for example, in German Offenlegungsschrift DE 196 18 283.2. There, a calibration polyhedron is provided instead of a calibration sphere. With the help of this calibration device one could, for example, example, select a default device with a flat definition flat. However, the selection of possible definition areas or default facilities is very limited.

With the calibration measuring device according to the further aspect 5 of the invention, the presetting device, in particular its definition surface, can be scanned in order to calibrate the presetting device in the state mounted on the measuring arm. Thus, the position and geometry of the definition surface relative to a reference point of the measuring device can be determined lo in a simple manner. The calibration measuring device can be, for example, a measuring head or a measuring device of a type which can alternatively also be used as a measuring arm measuring device for scanning the measuring object. In principle, therefore, it is possible to use the measuring arm measuring device otherwise to be attached to the measuring arm as a stationary calibration measuring device for scanning the definition surface or for calibrating the presetting device, and after the support points or support devices have been set up instead of the default device, the calibration measuring device

20 is mounted on the measuring arm as a measuring arm measuring device in order to measure the measuring object. It is important that the measuring device can be mounted on the measuring arm with the smallest possible tolerances, so that further calibration of the measuring device when mounted on the measuring arm is not necessary

25 is.

But especially preferred is a separate calibration measuring device to be used exclusively for calibration purposes. The calibration measuring device is expediently arranged in a stationary manner, so that the measuring arm can position the setting device relative to the calibration measuring device and the calibration measuring device can scan the definition surface. The Calibration measuring device is, for example, on a base surface or bottom surface of the measuring device.

In principle, it is also possible for the calibration measuring device to be arranged movably on a movable second arm, similar to the measuring arm, so that the calibration measuring device can be positioned relative to the predetermining device attached to the measuring arm by means of this second arm.

It is expedient for the calibration measuring device to have several, that is to say, preferably has at least two measuring sensors, which are oriented in different directions. For example, the measuring sensors are angular to one another, e.g. at right angles, and are in front of a base part of the calibration measuring device. The measuring sensors may, for example, stand in the manner of rays of a star away from the base part. Thus, the definition surface of the default device can be scanned by several different sides by the calibration measuring device. This allows higher degrees of freedom in the geometric design of the definition surface.

The plurality of measuring sensors are expediently equidistant from the base part or from a reference point of the base part. For example, the measuring sensors are arranged on the surface and / or the edges of a virtual enveloping geometric body, for example a ball, a polyhedron or the like.

The default device is expediently detachably mountable on the measuring arm. It is understood that also fixedly attached to the measuring arm default devices are possible in principle 3o. On the measuring arm expediently Befestigungsmit- tel present at which either the default device or the measuring arm measuring device for measuring the test object can be fastened. With the calibration measuring device both the measuring arm measuring device and the default device 5 can be calibrated.

The support device expediently has an adjustable stand for positioning on the support point. The stand has expediently one or more joint feet, each having at least two hingedly interconnected lo legs. The legs are connected for example by means of rotary or ball joints. To form a plurality of degrees of freedom, it is also possible to provide a plurality of rotary joints between the respective legs with mutually angular axes of rotation.

For the best possible adaptation to a required geometry of the support point, the support surface of the support device is expediently three-dimensionally deformable. This can be achieved for example by a chemically curable material in the support device. Especially useful,

2o because easy reconfigurable, but is an adjustable

Support pin arrangement, which is described for example in DE 10 2004 021 004.

It is understood that a geometrically fixed, for the needs but optimally selected support surface is advantageous 25, for example, a spherical or cylindrical support surface, a support surface with a recess or a projection corresponding to a projection or a recess on the measurement object ,

The definition surface of the default device correlates with a surface shape of the support site to be specified. at a spherical to be set support surface is the definition surface, for example, concave or hollow spherical, in a concave support surface, for example, convex.

In the exemplary embodiments of the invention presented below with reference to the drawings, articulated feet are used in each case. It is understood that, for example, only freely positionable on the base surface of the measuring device, in a longitudinal direction, e.g. in the vertical direction, adjustable support feet which are connected at the top to a fixed or detachably arranged coupling part, or individual linearly and / or articulatingly adjustable supports, e.g. in the manner of Figure 2, are conceivable. Show it:

1 shows a measuring device for carrying out the measuring method with a plurality of supporting devices, each having three support feet,

FIG. 2 shows a single supporting foot of a supporting device according to FIG. 1,

3a, 3b a support device with three support feet for use with the measuring device according to Figure 1,

4a, 4b, a coupling part of the support device according to Figures 3a, 3b from obliquely below and obliquely above,

FIG. 5 shows a supporting device with a supporting part with a spatially adjustable or deformable supporting surface,

FIG. 6 shows a supporting device according to the invention with three articulated feet for use with a measuring device in the manner of the measuring device according to FIG. 1, FIGS. 7a, 7b show a supporting part of a supporting device with a spatially adjustable or deformable supporting surface for placing a measuring object,

FIG. 8 shows a measuring device according to the invention, which partially corresponds to the measuring device according to FIG. 1, for carrying out a calibration method according to the invention with a calibration measuring device and with a schematically drawn measuring arm,

FIG. 9 shows a first presetting device mounted on the measuring arm during a calibration with the calibration measuring device according to FIG. 8,

FIG. 10 shows a second presetting device during a calibration with the calibration measuring device according to FIG. 8.

In the figures, substantially the same or equivalent components are provided with the same reference numerals and will be described only once.

A measuring device 10 includes support devices 11, 12, 13, 14, on which a physical object to be measured 15, for example the front window of a motor vehicle, is placed. The supporting devices 11-14 support the measuring object 15 during a measuring operation by means of a measuring arm 16 of the measuring device 10. The measuring arm 16 forms, for example, the component of a column measuring machine or a portal measuring machine. At the front, free end 27 of the measuring arm 16, a measuring device 17 is arranged with a tactile head 18 not visible in the drawing. The measuring arm 16 is three-dimensionally, ie spatially, adjustable by means of drives, not shown, and scans the measuring object 15, the level and / or the plane has curved surfaces. A pressure measuring device in the probe 18 measures the respective contact pressure and triggers a measuring signal at a suitable contact pressure, wherein an evaluation device 19 determines the respective measuring position on the basis of the position of the measuring arm 16 or of the probe 18.

The evaluation device 19 forms part of a schematically illustrated control device 20 of the measuring device 10 and contains, for example, a processor 21 and memory 22. The processor 21 program code of program modules executable, for example, by an evaluation module 23 of the evaluation device 19 for determining a measuring position of the probe 18 and from a positioning module 24, which forms part of positioning means 25 for positioning the measuring arm 16.

The support devices 11-14 are freely configurable, so that in addition to the measurement object 15, other measurement objects can be placed with a different shape. If e.g. a different type of vehicle window, a body part or any other object to be measured are placed on the support devices 11-14, they are newly set up or configured.

To set up the support devices 11-14, instead of the measuring device 17, a default device 26, which is shown in detail in FIG. 2, is mounted at the free end 27 of the measuring arm 16. A presetting head 29 at the front, free end 60 of the predetermining device 26 has a definition surface 28, which is, for example, shaped like a channel or a hollow sphere.

Variant I for the establishment of support devices according to the invention: The definition surface 28 correlates, for example, with head ends 90 of support legs 37 of the support devices 11, 12, 13 or 14. The definition surface 28 is, as it were, a negative of the head ends 90. The support legs 37 are advantageously joint feet.

To position and set up the support devices 11-14 at support points 32 to 35, the positioning module 24 and thus the measuring device 10 controls the measuring arm 16 in positions where the head ends 90 of the support legs 37 of the support devices 11, 12, 13 or 14 are positioned should. Coupling parts 38, each of which couples three support feet 37 or 200 of a support device 11, 12, 13 or 14 at their upper end regions 39, are then mounted on the head ends 90. For example, the coupling parts 38 have magnetic coupling devices and / or mechanical clamping devices 91 for attachment to the head ends 90.

The coupling parts 38 of the support devices 11-14 provide support points 32 to 35, on which later the measurement object 15 is placed for measurement. For example, ball-shaped support surfaces 30 of support members 31 of the support devices 11-14 provide e.g. the support points 32-35 ready.

The supporting devices 11-14 and supporting devices 300, 400, 500 and 700 and 500 according to the following description 25 have partially similar components, which are provided with the same reference numerals and not described in detail repeatedly.

At their lower end regions 40, the support feet 37 have foot parts 41 with which they can be positioned on the base surface 36. The foot parts 41 are eg by means of screwing 59 advantageously bolted to a stator plate 42 and a common foot 42, which forms a base for at least two support legs 37. It is understood that the foot parts 41 can also be screwed directly to the base surface 36, if there are corresponding screw means, such as screw, grooves with screw-receiving groove nuts or the like, are present.

The stator plate 42 is made of, for example, heavy metal material, containing a sand core or the like, so that the stator plate 42 is freely positionable on the base surface 36 and remains reliable at the positioning position and does not slip when the measurement object 15 contacts the respective support device 11-14, 700 , 500 is hung up. The stator plate 42 advantageously has a flat underside, which rests flat on the substrate or the base surface 36. On the underside adhesives, such as rubber or the like may be provided. The stator plate 42 could also be equipped with a suction device for sucking on the base surface 36.

The support legs 37 can also be positioned individually on the base surface 36 instead of by means of a common foot part. A foot part 241 is, for example, articulated with a lower joint 246, in the exemplary embodiment a ball joint, at the lower end 40 of a support foot 200 shown individually in FIG. The foot part 241 includes a suction device 206 for sucking on a substrate 236, for example the base surface 36. A flexible suction head can suck on the substrate 236. By means of an operating part in the form of an operating lever 208, a negative pressure on the suction head 207 can be generated for sucking against the substrate 236 and released for detachment from the substrate 236. The stator plate 42 and the suction device 206 are fixing means 57 according to the invention.

The support device 11 is positioned at the support point 32 below the default head 29. Then, the support feet s 37 are each individually positioned or configured so that their head ends 90 abut against the definition surface 28 of the default head 29. This is easy to accomplish in the support devices 11-14 according to the invention, since the articulated support legs 37 allow very free positioning of their head ends 90 relative to the default head 29 in the X, Y and Z directions.

The support legs 37 have a lower and an upper leg 43, 44, which are connected by means of a rotary joint 45 hinged together. Instead of the rotary joint 45, which allows i5 to rotate about a single axis of rotation, it would also be possible to provide a ball joint or a joint arrangement with two axial rotary joints whose axes of rotation are at an angle, in particular perpendicular to one another. Such an axial-rotation joint arrangement could also be used instead of spherical

20 joints 46 may be provided which improve the flexibility of the support legs 37 between the lower legs 43 and the foot parts 41. The upper legs 44 are pivotally connected to the coupling part 38, for example connected, for example by ball joints 47. Instead of the joints 46,

25 47 axial rotation joints could be provided in the manner of rotary joints 45.

The joints 45, 46, 47 can be fixed by means of a single actuating handle 48. The actuating handle 48, for example a handle nut, a rocker arm or the like, 30 fixes or locks the joints 45, 46. 47 synchronously or expediently sequentially, ie that first a first the joints 45, 46, 47 is fixed and the two other joints, for example, the joints 46, 47 are still movable. On the one hand, the respective support leg 37 can be comfortably adjusted spatially, whereby its legs 43, 44 can assume any oblique positions relative to the base 36, and on the other hand can be fixed in a simple manner, because several actuating handles are not to be used and the flexibility or the adjustability of the support leg 37 gradually decreases. It is understood that a stepless lockability or fixability with the support legs 37 may be appropriate.

The support feet 37 are movable, so that their head ends 90, 90 'can be easily approached from below and in any inclined positions on the definition surface 28. To illustrate, the support leg 200 (Figure 2) has e.g. an enlarged or enlarged illustrated spherical head end 90 '. The head end 90 'is hinged with a ball joint 247 at the upper end of the support leg 37.

The positioning means 25 then move the measuring arm 16 to the positions required for setting up the support point 33, so that the head ends 90 of the support legs 37 of the support device 12 can be set up and positioned there in the aforementioned manner. The support devices 13, 14 will be positioned and set up accordingly later. Then, the default device 26 is dismantled and the measuring device 17 is mounted on the measuring arm 16 and the measuring object 15 is placed on the support devices 11-14 at the now established support points 32-35. The measuring device 10 then scans the measuring object 15 with the aid of the probe 18 and measures it. Λ o

A ^' support device 700 according to Figures 3a, 3b substantially corresponds to the support devices 11-14 and has, for example, three articulated feet or support legs 37 or 200, which are arranged on a common stator plate 42. In addition, on the stand plate 42 there is a provisioning foot 701, which has the same structure as the support legs 37. The provisioning foot 701 is, for example, a flexible foot or a joint foot. The supply foot 701 provides a coupling part 738, on which a support part 731 is arranged. The coupling part 738 can be detachably fastened to the head ends 90 of the articulated feet 37 when the head ends 90 are positioned by the presetting device 26 at the desired position. The coupling part 738 is screwed to a hinge part 702 of a ball joint 703 of the supply foot 701.

FIG. 3 a shows the coupling part 738 in its state removed from the head ends 90. The support legs 37 are already positioned in the manner described above by means of the measuring arm 16 and then fixed. In FIG. 3b, the coupling part 738 is mounted on the head ends 90, so that the measurement object 15 can be deposited on the support part 731.

The coupling part 738 includes, for example, a plate 739 with coupling means 791 for the head ends 90 on its underside 740. The coupling means 791 are advantageously arranged at vertices of a triangle, e.g. an isosceles triangle. Accordingly, the plate 739 also has a substantially triangular outer contour. The coupling devices 791 are arranged at corner regions 742 of the plate 739.

Receivers 743 of the coupling devices 791 have an inner contour correlating with the head ends 90 and are, for example, cupped. To fix the head ends 90 on the coupling means 791 claws 744 are provided, which are adjustable with screws 745 on the plate 739. Lateral legs 746 are penetrated by the screws 745, which are screwed into side surfaces 747 at the corner regions 742. Conveniently, 747 receptacles 748 for receiving the legs 746 are provided on the side surfaces.

The claws 744 engage with their lower legs 749 under the bottom 740 to the receptacles 743 for the head ends 90. When screwing the screws 745, the claws

744 displaced forward in the direction of the receptacles 748 to fix the head ends 90 in the receptacles 748.

Advantageously, holding contours 751 are provided at the front ends 750 of the claws 744 and the legs 749, which correlate with the contours of the head ends 90. For example, the head ends 90 are spherical and the retaining contours 751 are hollow-spherical.

It is understood that a recess (not shown) may also be present at a front end 750 which, for example, correlates with a rod-shaped or cylindrical holding section 752 of the head ends 90.

Magnets 753 are expediently provided on the corner regions 742, which pull the claws 744 into a position holding the head ends 90. Collar 754 on the receptacles 748 support the head ends 90. The collars 754 are expediently arranged on a side of the receptacles 748 opposite the front ends 750 and only extend over a partial circumference of the receptacles 748. The collars 754 form abutments for the claws 744 The collars 754 are expediently adapted to an outer contour of the head ends 90. The support member 731 is replaceable on the coupling part 738. For example, the support member 731 is screwed by means of screws 732 to the coupling part 738. A support 733 of the support member 731 is, for example, obliquely on a support block 734 of the support member 731. A front end 735 of the support 733, for example, cylindrical and forms a support point 736 for placing the measuring object 15. For example, if a spherical support point is desired, the support member 731 are removed from the coupling part 738 and another, the desired support point contour providing support member are mounted on the coupling part 738.

Magnets may be present on the coupling devices 791 and / or the head ends 90, which serve as positioning aids for fastening the coupling part 738 to the head ends 90. For example, the magnets 753 perform a dual function. The magnets 753 pull the claws 744 into the fixing position and the head ends 90 into the seats 743.

The positioning means determine the respectively required positions of the head ends 90 on the basis of the desired spatial positions of the support points 32-35. Based on distances D1, D2 and D3 between a support surface 791 of the support part 731 at the positions of the support points 32-35 and the receptacles 743 the positioning means 25 determine the positions of the head ends 90 of the support legs 37, so that the coupling part 738 provides the support points 32-35 at the respectively desired positions when the coupling part 738 is mounted on the head ends 90. In Figure 4b, the distances Dl, D2 and D3 are shown as lines. It is understood that the distances Dl, D2 and D3 are determined as spatial relations of the receptacles 743 with respect to the support surface 791 by the positioning means 25. The positioning means 25 include, for example, a library with stored data for differently configured coupling parts or supporting parts in order to be able to carry out the above-explained coordinate calculation of the positions of the head ends 90. Furthermore, it is expedient to provide an input mask on an example graphical user interface and / or a parameterization interface of the measuring device 10, at which or via the geometries of inventive coupling parts or support parts can be defined.

A support member 31 may be fixed or movable connected to a coupling member 38 or formed by a single component. In the support devices 11-14 and the support 500, the support members 31, 531 are e.g. arranged on a linear guide 49 for linear adjustment of the support member 31, 531 relative to the coupling member 38 and the support legs 37. A carriage 50, on the upper side of which the support part 31, 531 is arranged, is guided linearly on a guide part 51. With the aid of a clamping nut 53 or another actuating handle, a clamping part 52 can be adjusted relative to the guide part 51 in such a way that it clamps the carriage 50 to the guide part 51.

A support part 531 arranged at the top on the carriage 50 of a coupling part 538 of the support device 500 has a support pin arrangement 534 with support pins 535 which can be clamped in a desired position by clamping means (not shown). In the unclamped state, the support pins 535 are expediently moved out of a housing 533 by spring force. In the unclamped state, the support pins 535 can be adjusted by means of a default device 526 to form a support point. First of all, for example, the support device 500 is pre-positioned below by means of the support legs 37 in the manner described above by individually arranging the support feet 37 and then fastening the coupling part 538 to the support legs 37. Coupling devices 591 of the coupling part 538 contain, for example, screw ends or screw receptacles. Then, the default means 526 is displaced in the direction of the support pin assembly 534, for example, down to form the desired support surface, so to speak emboss or einzustempeln. Then, the support pin assembly 534 is clamped or fixed in the longitudinal position defined by the default 526 with respect to the housing 533.

By means of the support pin arrangements 534, substantially any support surfaces can be defined, e.g. a spherical surface with an advantageous point-shaped support point by means of a dome-shaped setting device. It is also possible, for example, for some of the support pins 535 to protrude in front of the remaining support pins 534 so that they penetrate into a correlating receiving opening on a measurement object to be placed and thus support it.

Variant II for the installation of support devices according to the invention:

The definition surface 28 of the predetermining device 26 correlates, for example, with a spherical support surface or support surface 30 of a support part 31 of a respective support device 11, 12, 13 or 14. The definition surface 28 is, so to speak, a negative of the support surface 30. For positioning and setting up the support devices 11 14 controls the positioning module 24 and thus the measuring device 10, the measuring arm 16 in the position of the support points 32 to 35. The support points 32 to 35 are intended by the support devices 11-14 are formed, which are not initially positioned on a substrate or a base surface 36 of the measuring device 10. At the support points 32 to 35 formed by the support devices 11-14, the measurement object 15 is later to be placed for measurement.

The support devices 11-14 each have 3 articulated feet 37, which are fixedly coupled together in the variant II by a coupling member 38 at its upper end portions 39.

When the setting head 29 is positioned at the respective supporting point 32, 33, 34 or 35, the supporting device 11, 12, 13 or 14 to be set at each position at that position in the X direction or Y direction, i. roughly positioned vertically. In this case, the support member 31 is still removed from the default head 29.

After the measuring arm 16 or the default head 29 is positioned on the support point 32, for example, the support device 11 can be positioned and configured such that it forms the support point 32.

The support device 11 is positioned at the support point 32 below the default head 29. Then, the hinge feet 37 are positioned or configured so that the support surface or support surface 30 of the support member 31 abuts against the definition surface 28 of the default head 29. This is easy to implement in the support devices 11-14 according to the invention, since the articulated feet 37 allow a very free positioning of the support member 31 relative to the default head 29 in the X, Y and Z directions.

In any case, the joint feet 37 are movable so that the support member 31 in a simple manner to the definition surface 28th can be approximated and not only exactly from below, but also in any inclinations, so that the support surface 30 with respect to the definition surface 28, for example, is substantially centered.

The support member 31 may be fixed or movable connected to the coupling part 38 or formed by a single component. In the support devices 11-14 and the support device 500, the support parts 31, 531 are arranged on a linear guide 49 for linear adjustment of the support part 31, 531 relative to the coupling part 38 and the joint feet 37. A carriage 50, on the upper side of which the support part 31, 531 is arranged, is guided linearly on a guide part 51. With the aid of a clamping nut 53 or another actuating handle, a clamping part 52 can be adjusted relative to the guide part 51 in such a way that it clamps the carriage 50 to the guide part 51.

After all the articulated feet 37 have been fixed by means of the actuation handles 48, if necessary the linear guide 49 has been adjusted, the support part 31 is positioned at the support point 32. Then remove the positioning means 25 the

Measuring arm 16 of the support point 32 and drive the support point 33 so that the local support device 12 can be set up and positioned in the aforementioned manner. The support devices 13, 14 will be positioned and set up accordingly later. Then, the default device 26 is dismantled and the measuring device 17 is mounted on the measuring arm 16 and the measuring object 15 is placed on the support devices 11-14 at the now established support points 32-35. The measuring device 10 then scans the measuring object 15 with the aid of the probe 18 and measures it. By the three articulated feet 37, the support devices 11- 14 in the fixed state have a high stability or can absorb a relatively large load. If lower or higher payloads are required, for example, only two or more than three articulated feet can be present. For relatively small loads the support device 200 shown in Figure 2 is provided.

The support device 200 has a single articulated foot 37, at the upper end 39 of which a support part 231 with a spherical surface or support surface 30 is arranged. The

Support member 231 is hinged with a ball joint 247 at the upper end of the joint foot 37. A lower joint 246, in the exemplary embodiment a ball joint, at the lower end 40 of the joint foot 37 hingedly connects the articulated foot 37 with a foot part 241. The foot part 241 contains a suction device 206 for sucking on a substrate 236, for example the base surface 36. A flexible suction head can suck on the ground 236. With the aid of an operating part in the form of an operating lever 208, a negative pressure on the suction head 207 for sucking against the substrate 236 can be generated, or be lifted to release the substrate 236. The stator plate 42 and the suction device 206 are fixing means 57 according to the invention.

Magnetic means or a magnet 58 facilitate the positioning of the support part 31 and / or relative of the head ends 90, 90 'to the presetting device 26. The magnet 58 is integrated into the presetting device 26, for example. The magnet 58 is, for example, a permanent magnet or an electromagnet.

To set up the head ends 90, 90 ', the magnet 58 is supplied with electric current and thus activated. The magic net 58 attracts the ferromagnetic head ends 90, 90 ', provided they are already at a predetermined distance from the default device 26, so that they rest against the definition surface 28. It is thus easy to fix the support legs 37 5 and thus the total support devices 11-14 by means of the actuating handle 48.

For positioning the support members 31, 231, the magnet 58 is supplied with electric current and thus activated. The magnet 58 attracts the ferromagnetic support members 31, 231, lo if they are already at a predetermined distance from the default device 26, so that the support surface 30 abuts the definition surface 28. It is then particularly easy to use the articulated feet 37, i. in total fix the support devices 11-14, 200 by means of the actuating handle 48 to i5.

An alternative attachment concept is realized with fixing means 57 of the support device 300. In principle, the structure of the support device 300 is similar to that of the support devices 11-14. In contrast to the abovementioned support

However, devices are foot parts 341 at the lower ends of the joint feet 37 of the support 300 individually and separately placed on the ground. For example, the foot parts 341 have the shape of sliding blocks, which can be introduced into corresponding grooves on the base 36

25 and are clamped there. Furthermore, magnets 301 are arranged as fixing means 57 on the foot parts 341. By means of the magnets 301, the foot parts 341 can be magnetically fixed to the substrate 36.

Like the supporting devices 11-14, 500, the supporting device 300 also has a coupling part 38 which couples the articulated feet 37 and a linear guide 49 on its upper side. The coupling Part 38 is expediently detachable from the joint feet 37 for the variant I. On the carriage 50, a support member 331 is arranged. A roller-shaped support element 332 is arranged on a upstanding in front of the carriage 50 upright part 333. The support element 332 has a cylindrical support surface 334. A planar measurement object lying on the support part 331 is thus supported not only punctiform but approximately along a line on the upper side of the support part 331. It is also possible that the support part 331 penetrates into a receiving opening provided on the respective measurement object and thus forms a kind of pin for penetrating into this receiving opening.

The support part 331 is detachably fastened, for example with a screw connection, to the linear guide or to the rail 50. Instead of the support member 331, for example, the support member 431 shown in Figures 7a, 7b could be attached to the carriage 50. The support member 431 is a type of 3D support member having a three-dimensionally deformable support surface 432. The support surface 432 is formed by a support pin assembly 434 extendable upwardly from a housing with support pins 435. The support pins 435 form a kind of support pin package. Each support pin 435 is individually extendable from the housing 433 in the longitudinal direction of the support member 431. Expediently, the support pins 435 are mounted in the housing 433 by means of springs or are based on springs. The support pin assembly 434 is thus resiliently mounted in the housing 433. When relaxing the spring arrangement not visible in the figure, the support pins 435 move out of the housing 433, in this case upwards, until they rest against a definition surface 428 of a predetermining device 426. The default device 426 is mounted on the in Fig. 7a, 7b not visible measuring arm 16 and is through this positioned at a predetermined support point in the manner described above. The definition surface 428 is expediently spherical, ie it has the shape of the inner surface of a sphere. When the support pin arrangement rests against the definition surface 428, it is fixed by means of a clamping device, for example by means of a clamping ring or a clamping screw 436, or clamped in the desired position.

Also, the carriage 50 of the support 500 above arranged support member 531 has a support pin assembly in the manner of the support member 331, namely a support pin assembly 534 with support pins 535 which are clamped by not shown clamping means in a desired position. In the unclamped state, the support pins 535 are expediently moved out of a housing 533 by spring force. In the unclamped state, the support pins 535 can be adjusted with the aid of a presetting device 526 to form a support point.

The following procedure has proven to be expedient. The predetermining device 526 attached to the measuring arm 16 at the front is positioned at a desired supporting point. Then, the support device 500 is adjusted relative to a punch element 536 at the front, free end of the default device 526, so that the default device or the punch element 536 the support pins 535 into the housing 533 partially hineinverstellen. Stamp member 536 forms a resultant three-dimensional support surface on the top of support pin assembly 534 by appropriately adjusting support pins 535. After support 500 is fixed, ie, hinge feet 37 are clamped and support pin assembly 534 clamped, default means 526 can be removed again. which is shown in FIG. It is understood that a different approach is possible: First, the default means 526 is moved approximately in the desired position, but is removed from the desired support point position. Then, the support device 500 is positioned and fixed roughly by means of the articulated feet 37 below or in the area of the presetting device 526. Then, the default means 526 is displaced in the direction of the support pin assembly 534, for example, down to form the desired support surface, so to speak emboss or einzustempeln. Then the

Support pin assembly 534 in the longitudinal positions defined by the default 526 with respect to the housing 533 clamped or fixed.

It is understood that with the help of the support pin assemblies 434, 534 largely any support surfaces are definable. For example, a spherical surface with an advantageous punctiform support point with the help of the dome or default device 426 definable. It is also possible, for example, for some of the support pins 435 or 535 to protrude in front of the remaining support pins 434 or 534 in such a way that they penetrate into a correlating receiving opening on a measurement object to be placed on it and thus support it.

It is advantageous, but not mandatory, to calibrate the measuring device with the aid of a calibration device 54. A calibration ball 55 arranged, for example, on a stand 56 is scanned with the respective measuring device 17 or default device 26 mounted on the measuring arm 16 at a plurality of points on the outer circumference of the calibration ball 55, about the center of the calibration ball 55 or the distance of a center point of this ball 55 a reference point of the measuring device 17 or the default device 26 to determine. It is for example It is advantageous to calibrate the predetermining device 26 by means of the calibrating device before the interpolation points 32-35 are set up, and later, ie, after setting up the supporting devices 11-14 and before placing the measuring object 15 on the supporting devices 11-14, the measuring device 17 to calibrate by means of the calibration device.

An inventive calibration method is explained below with reference to FIGS. 8, 9 and 10:

In the calibration method, the abovementioned supporting devices are expediently - but not necessarily - usable. The support devices or simpler supports are advantageously set up in the manner described above, but can also be positioned in other ways at the desired support points.

A measuring device 10 'according to FIG. 8 advantageously corresponds essentially to the measuring device 10 according to FIG. 1. However, its evaluation device 19' also comprises a calibration table 112.

The supporting devices 11-14 or other supports, for example the supporting devices 200, 500 (FIGS. 2, 5), are freely configurable, so that instead of the measuring object 15 also measuring objects of a different shape, for example different types of vehicle windows, body parts or other measuring objects, can be placed on the supporting devices 11-14. 14, 200, 500 can be launched. The support devices 11-14, 200, 500 are then - advantageously, but not necessarily by means of the measuring device 10 '- each newly set up and configured, ie at the necessary support points where the measurement object 15 on the support devices 11-14, 200, 500 placed adjusted so as to support surfaces 30, 413, 513 of the support Provide devices 11-14, 200, 500, the support points for placing the measuring object 15 or form.

For positioning and setting up the support devices 11-14, 200, 500 serve default devices 26, 226, 326, 426, 526, which are fastened instead of the measuring arm measuring device 17 on the measuring arm 16, which is shown partially schematically in the drawing. The default devices 26, 226, 326, 426, 526 each have different definition surfaces 28, 228, 328, 428, 528, namely, for example, a channel-like definition surface 28, stamp-like or at least partially planar definition surfaces 328, 428 as well as concave or hollow spherical definition surfaces 28, 528. The definition surfaces 28, 228, 328, 428, 528 correlate with the respectively to be adjusted bearing surface or support surface 13 to 513, so to speak constitute a negative of the respective support surface 13 to 513th

The supporting devices 11-14 are set up, for example, with the aid of the default device 26. For this purpose, first the default device 26 is attached to a condyle 130 at the free end 27 of the measuring arm 16, for example, screwed, infected or the like. To this extent, the condyle 130 forms a fastening means for fastening the predetermining device 26 or, alternatively, the measuring arm measuring device 17, which can likewise be fastened to the condyle 130.

The condyle 130 serves as the measuring arm 16 for positioning the measuring arm measuring device 17 or the default device 26 and has, for example, a rotatable, preferably releasably secured to the measuring arm 16 base member 62 to which a pivot member 63 is pivotally mounted. The base part 62 is, for example, on the underside of a mounting head 64 fastened, the grooves, screw holes or the like for releasably securing the base part 130 has. The axes of rotation of the base part 62 relative to the measuring arm 16 and the pivoting part 63 relative to the base part 62 are at an angle to one another, for example at right angles.

The default devices 26, 226, 336, 426, 526 include, for example, a rod 61 with a default head 29 at its front end 60, on which the definition surface 28 is formed. The rod 61 is inserted, for example, in the pivoting part 63, screwed or otherwise secured thereto.

Before the interpolation points 32 to 35 are set up, the presetting device 26 is calibrated. In a conventional measuring device, for example, a calibration device 54 with a calibration ball 55 on a stand 56 would be used for this purpose. The calibration device 54 is suitable, for example, for calibrating the spherical definition surface 28. However, the definition surfaces 228, 328, 428 shaped differently in terms of geometry can not be calibrated with the aid of the calibration device 54.

Rather, a calibration measuring device 70 according to the invention with a base part, eg a stand 71, on which a plurality of sensors 72, eg probing heads, are arranged, is suitable for their calibration. The sensors 72 project radially from the stator 71. For example, one sensor 72 is oriented vertically upward, while other sensors 72 are oriented substantially horizontally. The calibration measuring device 17 contains, for example, four horizontally oriented, mutually perpendicular sensors 72 protruding from the stator 71 and an upward sensor 72nd The measuring arm 16 positions, for example, the presetting device 26 from different sides to the calibration measuring device 70, wherein in each case a sensor 72 scans the definition surface 28. During this scanning, the calibration 5 measuring device 70 determines measured values 73, which it transmits via a line 74 and / or wirelessly to the control device 20. The control device 20, ie, for example, the evaluation module 23, stores the measured values 73 in a calibration table 112 and uses the measured values 73 to determine the coordinates of the definition area 28 relative to a reference point 75, for example in or on the measuring arm 16, a base part (not shown) of the measuring arm 16 or in an origin of a coordinate system 76 of the measuring device is defined. With the calibrated presetting device 26, the measuring device 10 'then sets up the supporting devices 11-14.

The measuring arm 16 positions the default device 26 at the support points 32 to 35, where the respective support device 11 is positioned. The structure of the supporting devices 11-14 is very similar to the structure of the supporting device 500, with the difference that the supporting devices 11-14 have a supporting part 31 with a fixed spherical supporting surface 13, whereas the supporting surface 513 is three-dimensionally deformable.

The support devices 11-14 are placed on a base surface 5 or on a base 36 of the measuring device 10 ', initially approximately in the region of the positioning means 26 positioned at the respective support point 32 to 35, where they are coarsely positioned, so to speak. Articulated feet 37 of the supporting devices 11-14 are still freely movable. The articulated feet 37 are attached o to a common foot part or a stator plate 42 at their lower ends 40 with foot parts 41 which contain screwing means 59, for example. The stand plates 42 are positioned on the base surface 36 and are sufficiently heavy that they remain at the positioning location. The foot parts 41 are articulated by means of joints, expediently ball joints 46, on the lower legs 43. The legs 43 are articulated, for example, connected by means of a ball joint or an axial pivot 45 with upper Gelenkfußschenkeln 44. At their upper end regions 39, the articulated feet 37 are coupled together by means of a coupling part 38, ie the articulated feet 37 support the coupling part 38 as a whole. The articulated feet 37 are expediently connected in an articulated manner to the coupling part 38, for example by means of axial pivot joints or ball joints 47 The articulated feet 37 are therefore coupled to one another at the support devices 11-14, 500 both at their upper and at their lower end regions 39, 40.

The articulated feet 37 enable a spatially largely flexible positioning of the support member 31 at the support point 32 to 35, even if the stator plate 42 is already so roughly positioned at a position assigned to the respective support point 32 to 35. The support member 31 can be positioned by the hinge feet 37 not only in the Z direction but also in the X and Y directions.

The joints 45 to 47 can be fixed by means of a single actuating handle 48, after the support member 31 is positioned at the respective support point 32 to 35 or at least partially abuts the definition surface 28 positioned there. The actuating handle 48, for example, a clamping nut, a rocker arm or the like, is used for expediently sequential, but alternatively also simultaneous or groupwise fixing of the joints 45 to 47. Instead of the single actuation handle 48, it would also be possible to provide a plurality of actuation handles, which are each assigned to one or more joints 45 to 47.

On the coupling part 38, a linear guide 49 is advantageously provided with a carriage 50 for fine positioning of the support member 31 at the respective support point 32 to 35. The support member 31 could also be rotatably mounted on the coupling part 38 (not shown). The carriage 50 is guided on a guide part 51 arranged on the coupling part 38 and can be clamped or fixed by means of a clamping part 52 which can be actuated by means of an actuating handle in the form of a clamping nut 53.

If the support devices 11-14 are positioned or set up on the support points 32 to 35, the presetting device 26 is removed from the measuring arm 16 and the measuring arm measuring device 17 is mounted on the measuring arm 16, in particular on the pivoting part 63 of the condyle 130 in its place , Then, the measuring arm measuring device 17 is expediently also calibrated with the aid of the calibration measuring device 70. Then, the measurement object 15 is placed on the support devices 11-14 and measured, wherein the probe 18 scans the measurement object 15 at predetermined measurement positions.

The calibration measuring device 70 permits a liberal selection of differently configured presetting devices which are particularly advantageous in connection with three-dimensionally deformable supporting surfaces of a respective supporting device or other measuring object-specific supporting surfaces. For example, support parts 431, 531 have three-dimensionally deformable support surfaces 413, 513, so that it is also possible to speak of a 3D support part. The

Support surfaces 413, 513 are provided by support pin assemblies 434, 534, which have a housing 533, 433 extendable in the longitudinal direction support pins 435, 535. The support pins 435, 535 form a kind of support pin package, but each support pin 435, 535 can be moved out of the housing 533, 433 individually in the longitudinal direction of the support part 531, 431. The support pins 435, 535 are expediently mounted by means of springs in the housings 533, 433 or are based on springs. When relaxing the spring arrangements, not visible in the drawing, the support pins 435, 535 drive out of the housings 533, 433, as it were, in the present case, for example, upwards

(With a lateral extension is possible) until they abut the defining surfaces 528, 428 of the default device 526, 426. The support pins 535 form, for example, a support surface 513, which form a negative to the stamp-like definition surface 528 of the predetermining device 526. The support pins 435, however, form a spherical support surface 413, so that the measurement object 15 later expediently punctiform or at least substantially punctiform rests on the support pins 435. Even while the support pins 435, 535 abut against the definition surfaces 528, 428, they are fixed by means of a fixing device, e.g. by means of a clamping ring and / or a clamping screw 536, 436. Then, the default device 526, 426 are removed.

It is understood that with the help of the support pin assemblies 434, 534 largely any support surfaces are definable. It is e.g. It is also possible, for example, for some of the support pins 435 or 535 to protrude in front of the remaining support pins 434 or 534 in such a way that they penetrate into a correlating receiving opening on a measurement object to be placed on it and thus support it.

The support device 200 has a single articulated foot 37, at the upper end 39 of which a support part 231 with a ball-shaped gene support surface or support surface 13 is arranged. The support member 231 is hinged with a ball joint 247 at the upper end of the articulated foot 37. A lower joint 246, in the exemplary embodiment a ball joint, at the lower end 40 of the articulated foot 37 hingedly connects the articulated foot 37 to a foot part 241. A suction device 206 on the foot part 241, eg a flexible suction head with a control part 208, is used for suction a background 236, for example the base surface 36.

The suction device 206 serves as a fixing means 57 for fastening the supporting device 200 to a base 36.

An alternative concept is realized, for example, in the foot part 41 with the screw 59, which is also fastened directly to the substrate 36. The base surface 36 of the measuring device 10 'could for example have screw receptacles, grooves or the like, to which the support devices 11-14, 500 can be fastened.

Furthermore, it is conceivable to fasten the support devices to the ground by means of magnets or the like.

It is understood that the support devices that are used in conjunction with the measuring device 10 'according to the invention, may also have a lower adjustability in space. Thus, for example, the support members 431 or 531 can also be mounted on uprights, which are, for example, • adjustable only in the Z direction and otherwise in the X or Y direction only by appropriate adjustment on the substrate 36 of the measuring device 10 'can be positioned.

Furthermore, a measuring device in the manner of the measuring device 10 'is also suitable for calibrating a presetting device. tion with which, for example, the head ends of support feet are set up, which are then connected by a coupling part.

Claims

claims

1. A supporting device for a measuring device (10) with a spatially adjustable measuring arm (16) for measuring a physical measuring object (15), wherein the supporting device (11-

5 14; 500; 700) can be positioned by means of a presetting device (26) arranged on the measuring arm (16) for providing at least one supporting point (32-35; 736) on or on which the measuring object (15) can be arranged during a measurement, characterized in that it has at least two supporting loops (37, 200), each with a head end (90, 90 ') corresponding to the presetting device (26), so that the supporting feet (37, 200) are supported on a base surface by means of the presetting device (26) (36) of the measuring device (10) being positionable such that they have a coupling part (38; 538; 738) with coping means (61; 561, 761) for the head ends (90;

90 ') of the support feet (37; 200), such that the coupling part (38; 538; 738) can be mounted on the support feet (37; 200) after the support feet (37; 200) have been positioned, and in that the coupling part (38 ; 538; 738) the at least one support point

20 (32-35; 736).

2. Support device according to claim 1, characterized in that at least one head end (90, 90 ') is spherical or cylindrical or is designed as a screw end or detent end, to which the coupling devices (61, 561,

25 761) on the coupling part (38; 538; 738) form corresponding counterparts.

3. Support device according to one of the preceding claims, characterized in that at least one coupling device (61; 561, 761) has a claw (744) for clamping the at least one head end (90; 90 ') into a receptacle (743).

5 of the coupling device (61, 561, 761).

4. Support device according to claim 3, characterized in that the claw (744) is biased by a spring arrangement and / or a magnet in a head end (90, 90 ') fixing position.

lo

5. Support device according to one of the preceding claims, characterized in that at least one head end (90, 90 ') and / or at least one coupling device (61, 561, 761) of the coupling part (38, 538, 738) has a magnet (753 ) having.

i5

6. Support device according to one of the preceding claims, characterized in that it comprises a movable staging foot (701) for providing the coupling part (38; 538; 738) to which the coupling part (38; 538; 738) can be fastened or attached and with the coupling part (38;

20,538; 738) is adjustable relative to the at least two support feet (37; 200) prepositioned by means of the presetting device (26) so that the coupling part (38; 538; 738) can be mounted on the at least two support feet (37; 200).

7. Support device according to claim 6, characterized in that the coupling part (38; 538; 738) is articulated in a pivoting or ball-joint manner on the provision foot (701).

8. Support device according to one of the preceding claims, characterized in that at least one of the support feet (37; 200) and / or the supply foot (701) according to claim 6 has at least two Versteil degrees of freedom.

9. Support device according to claim 8, characterized in that the at least two adjustment degrees of freedom by a

5 free positioning of the respective foot on a substrate and / or a length-adjustable portion of a foot and / or at least one rotary or ball joint of a foot can be provided.

10. Support device according to one of the preceding claims, characterized in that at least one support foot and / or the provision foot (701) according to claim 6 is a joint foot with at least two rotationally or ball-jointed legs (43, 44).

11. A supporting device according to one of the preceding claims, characterized in that at least one of the supporting feet (37; 200) has a fixable head part which is movable by means of a rotary joint or a ball joint and which supports the head end (90; 90 '). ).

12. Support device according to one of the preceding claims

20 che, characterized in that at least one of the support feet (37; 200) and / or the Bereitigungsfuß (701) according to claim 6 by means of a rotary joint or a ball joint (46) on a foot part (42) is articulated.

13. Support device according to one of the preceding claims

25, characterized in that at least one of the support feet (37; 200) and / or the supply foot (701) according to claim 6, a screw means (59) for screwing to the base surface (36) and / or a magnet arrangement for magnetic holding at the base surface (36) and / or a suction direction (206) for suction on the base surface (36) by means of vacuum and / or a stator plate and / or a clamping device for clamping on the base surface (36) of the measuring device (10).

s

14. Support device according to one of the preceding claims, characterized in that at least two of the support feet (37; 200) and / or the Bereitstellungsfuß (701) according to claim 6 and at least one support leg by a common foot part (42), in particular a stator plate coupled lo are.

15. Support device at least one support leg and / or the Bereitstellungsfuß (701) are fixed according to claim 6 by means of a single actuating handle.

16. A supporting device according to one of the preceding claims, characterized in that the at least one support point (32-35; 736) is formed by the coupling part (38; 538; 738) or by a coupling part (38; 538; ) arranged supporting part (31; 531; 731) is formed.

Support device according to one of the preceding claims, characterized in that it has a three-dimensionally deformable support surface and / or a support pin arrangement (534) for forming a support surface (32-35; 736) to form a resulting three-dimensional support surface.

25 18. A support device according to one of the preceding claims, characterized in that on the coupling part (38; 538; 738) has a linear guide (49) for the linear positioning of the at least one support point (32-35; 736).

19. Measuring device (10) with at least one supporting device (11-14; 500; 700) according to one of the preceding claims, wherein the measuring device (10) has positioning means (25) for positioning the setting device (26) at the position.

The measuring device (10) has a predetermining device (26) corresponding to the head ends (90; 90 ') of the support legs (37; 200).

20. Measuring device according to claim 19, characterized in that the positioning means (25) for converting a position of the at least one support point (32-35; 736) to positions of the head ends (90; 90 ') is configured.

21. A measuring method for measuring a physical object to be measured (15), in which a measuring device (10) with a spatially adjustable measuring arm (16) measures a measuring object (15), which points at support points (32-35 736) of a supporting device (11-14; 500; 700) lies on or abuts, with the step:

- Positioning the support device (11-14; 500; 700) with a on the measuring arm (16) arranged default device

20 (26) for providing at least one support point (32-35; 736), characterized by the steps of

Positioning the presetting device at locations where head ends (90, 90 ') of at least two support legs (37, 200) of the support device are respectively to be positioned,

25 - positioning the support feet (37; 200) on a base surface (36) of the measuring device (10) so that their respective head end (90; 90 ') is in contact with the presetting device (26),

- mounting a coupling part (38; 538; 738) for providing the at least one support point (32-35; 736) to the

Head ends (90; 90 ') of the support legs (37; 200), and - placing the measuring object (15) on the at least one supporting point (32-35; 736).

22. Measuring method according to claim 21, characterized by for converting a position of the at least one support point

5 (32-35; 736) at positions of the head ends (90; 90 ').

23. Measuring method according to claim 21 or 22, characterized by fixing the support feet (37, 200).

24. A supporting device for use with a measuring device (10) with a spatially adjustable measuring arm (16) for measuring a physical object to be measured (15) with in particular at least one curved surface, wherein with a predetermined on the measuring arm (16) setting means (26; 526) having a definition surface at least one support point (32-35) can be predetermined, on or on which the measurement object i5 (15) during a measurement lies, characterized in that it comprises at least one articulated foot (37) with at least two pivotal or ball joint connected legs (43, 44), that the at least one articulated foot with a foot part (41; 241; 341) at its lower end

20 is positionable on a base surface of the measuring device (10) such that a supporting part (31; 231; 331; 431; 531) for placing the measuring object (15) on an upper end region of the supporting device (11-14; 200; 300; 500 ) by means of at least one joint foot spatially substantially free to the

25 at the at least one support point (32-35) positioned default means (26, 426, 526) is adjustable towards, so that the support member may form the at least one support point, and that the support device is fixable. 25. A supporting device according to claim 24, characterized in that a lower leg (43) of the at least one articulated foot (37) by means of a rotary joint or a ball joint (46) to the foot part (41; 241; 341) is articulated.

26. A supporting device according to claim 24 or 25, characterized in that the support part (31; 231; 331; 431; 531) is attached to an upper limb (44) of the at least one articulated foot (37) by means of a swivel joint or a ball joint (47). is articulated.

lo

27. Support device according to one of claims 24 to 26, characterized in that the at least two legs (43, 44) of the joint foot are each positioned obliquely with respect to the base surface.

28. Support device according to one of claims 24 to 27, characterized in that the at least two legs (43,

44), the support part (31; 231; 331; 431; 531) and the foot part (41; 241; 341) are hinged together by means of at least three hinges (45, 46, 47).

29. Support device according to claim 28, characterized in that two of the at least three joints have ball joints (46,

47) and a hinge is a hinge (45) or a ball joint.

30. Support device according to one of claims 24 to 29, the foot part (41; 241; 341) fixing means (57) for fixing on the

25 base surface of the measuring device (10).

31. A support device according to claim 30, characterized in that the fixing means (57) a screw means (59) for screwing on a substrate and / or a Magnetan- Order (301) for magnetic support on the ground and / or a suction device (206) for holding on the ground by means of negative pressure and / or a stator plate (42) and / or a clamping device for clamping on the sub 5 contain base.

32. Support device according to one of claims 24 to 31, characterized in that the foot part (41; 241; 341) is replaceable.

33. Support device according to one of claims 24 to 32, characterized in that it comprises a plurality, in particular at least two or three articulated feet (37) in the manner of the at least one articulated foot, at its upper end by a particular releasably secured coupling part (38) are coupled, and that the support part (31; 231; 331; 431; 531) forms the i5 coupling part (38) or is arranged on the coupling part (38).

34. Support device according to claim 33, characterized in that at least one articulated foot (37) has a foot part (41; 241; 341) which is separate from the foot part or parts (41;

20 241; 341) of the other joint feet can be positioned on the base surface.

35. Support device according to claim 33 or 34, characterized in that at least two of the joint feet (37) by a common foot part (42), in particular a stator plate

25 te, are coupled.

36. Support device according to one of claims 24 to 35, characterized in that the at least one articulated foot (37) by means of a single actuating handle (48) is fixable.

37. Support device according to claim 36, characterized in that the joints of the articulated foot (37) with the actuating handle (48) sequentially or in groups can be fixed, in particular clamped, are.

38. Support device according to one of claims 24 to 37, characterized in that the support part (31; 231; 331; 431; 531) for forming the support point (32-35) has a three-dimensionally deformable support surface and / or a support pin arrangement for forming a support surface resulting three-dimensional Stützober- lo surface.

39. Support device according to one of claims 24 to 38, characterized in that the support part (31; 231; 331; 431; 531) has a spherical or a planar bearing surface and / or a receiving opening for receiving the measuring object (15). or a projection, in particular a pin, for insertion into a receiving opening of the measurement object (15).

40. Support device according to one of claims 24 to 39, characterized in that it at its upper end a Li

20 near guide (49) for linear adjustment of the support member (31, 231, 331, 431, 531).

41. The support device according to claim 24, wherein the support part (31;

Positioning aid comprises suction means and / or magnetic means (58) for facilitating the positioning of the support member (31; 231; 331; 431; 531) relative to the presetting means.

42. Measuring device with at least one support device (11-14; 200; 300; 500) according to one of claims 24 to 41.

43. Measuring method for measuring a physical object to be measured (15) with in particular at least one curved upper part

5 surface, in which a measuring device (10) with a spatially adjustable measuring arm (16) measures a measuring object (15), which lies on or abutment points (32-35) during the measurement at several contact points, at least one supporting point by a supporting device (11-14; 200; 300; lo 500), comprising the steps of:

Predetermining at least one support point with a presetting device (26; 426; 526) arranged on the measuring arm (16),

Positioning the support device (11-14; 200; 300; 500) i5 on a base surface of the measuring device (10) in the region of the support point (32-35),

- Adjustment of the support device (11-14; 200; 300; 500) to the default device (26; 426; 526), until a support member for placing the measuring object (15) on a definition surface

At least one articulating foot (37) of the supporting device (11-14; 200; 300; 500) is associated with at least two articulated or ball-jointed articulations of the presetting device for defining the at least one support point.

25 other connected legs (43, 44) is spatially adjusted,

Fixing the supporting device (11-14; 200; 300; 500),

- Releasing the at least one support point by the measuring arm (16), so that the measurement object (15) for the measurement

3o the measuring device (10) with an associated support point on the at least one support point on or to the Support device (11-14; 200; 300; 500) can be applied or created.

44. measuring device with a spatially adjustable measuring arm (16) for measuring a physical object to be measured (15) s with in particular at least one curved surface, with a supporting device (11-14, 200, 500) for forming a support point (32-35), on the or on which the measurement object (15) during a measurement on a support device (11-14, 200, 500) of the measuring device (10), with a on the lo measuring arm (16) arranged and with the measuring arm (16) positionable default device (26; 226; 326; 426; 526) having a definition surface (28; 228; 328; 428; 528) for specifying the support point such that the support device (11-14, 200, 500) is adjustable towards the definition surface, until an i5 support surface (13; 413; 513) of the support device (11-14, 200, 500) at least partly bears against the definition surface for forming the support point, characterized in that it comprises a calibration measuring device (70) which is provided with a Steuereinrichtun g (20) of the measuring device (10)

20 is 20 and that when scanning the definition surface (28; 228;

328; 428; 528) of the presetting device mounted on the measuring arm (16) transmits measured values (73) for calibrating the measuring device (10) to the control device (20).

45. Measuring device according to claim 44, characterized in that the calibration measuring device (70) is arranged in a stationary manner, so that the calibration measuring device (70) is movable when the measuring arm (16) is positioned relative to the calibration measuring device (70 ) can sample the definition surface (28; 228; 328; 428; 528).

30 46. Measuring device according to claim 44, characterized in that the calibration measuring device (70) for scanning the definition surface (28; 228; 328; 428; 528) is arranged on a movable second arm of the measuring device (10 ').

47. Measuring device according to one of claims 44 to 46,

5 characterized in that the calibration measuring device (70) has at least two measuring sensors oriented in different directions (72).

48. Measuring device according to claim 47, characterized in that the at least two measuring sensors (72) are angled, lo, in particular at right angles, to one another and protrude in front of a base part (71) of the calibrating measuring device (70).

49. Measuring device according to one of claims 44 to 48, characterized in that the presetting device (26; 226; 326; 426; 526) can be detachably mounted on the measuring arm (16).

i5

50. Measuring device according to one of claims 44 to 49, characterized in that the measuring arm (16) has fastening means with which either the default device (26; 226; 326; 426; 526) or a measuring arm measuring device (17) for measuring the Measuring object (15) releasably attached to the measuring arm (16)

2o are fastened, and that the calibration measuring device (70) for calibrating the measuring arm measuring device (17) is configured.

51. Measuring device according to one of claims 44 to 50, characterized in that the at least one Stützvorrich- tion (11-14, 200, 500) at least one articulated foot (73) having at least two rotationally or ball joint-linked legs (43, 44) for positioning and holding a support member for applying or applying the measurement object (15) at the support point (32-35).

52. Measuring device according to claim 44, wherein the support surface (413;

53. Measuring device according to claim 52, characterized in that the at least one supporting device (11-14, 200,

500) has an adjustable support pin arrangement (434, 534) with which a resulting three-dimensional support surface (13; 413; 513) can be formed for applying or applying the measurement object (15).

54. Measuring device according to one of claims 44 to 53, characterized in that the at least one support device (600) has a spherical support surface (13) and / or a roller-shaped support surface and / or a recess and / or a projection for applying or applying the Measuring object (15).

55. Measuring device according to one of claims 44 to 54, characterized in that the definition surface (28; 228; 328; 428; 528) of the presetting device correlates with a surface shape of the support point to be provided (32-35).

56. Measuring device according to one of claims 44 to 55, characterized in that the definition surface is concave, in particular hollow-spherical.

57. Calibration method for calibrating a measuring device (10) with a spatially adjustable measuring arm for measuring a physical measuring object (15) with in particular at least one curved surface, with at least one supporting device (11-14, 200, 500) for forming a supporting point ( 32-35), on or on which the measuring object (15) is located during a measurement, with one on the measuring arm (16) pre-setting means (26; 226; 326; 426; 526) arranged with the measuring arm and having a definition surface (28; 228; 328; 428; 528) for prescribing the support point (32-35) so that the support device {11-14 , 200, 500) is adjustable toward the definition surface until a support surface (13; 413; 513) of the support device (11-14, 200, 500) at least partially abuts the definition surface for forming the support point (32-35), marked by:

Positioning the measuring arm and a calibration measuring device 70 relative to one another,

Scanning the definition surface (28; 228; 328; 428; 528) of the presetting device mounted on the measuring arm (16) by the calibration measuring device (70) for sending measured values (73) for calibrating the measuring device (10) to an i5 control device (20) the measuring device, and

- Calibration of the measuring device based on the measured values (73).

58. Calibration method according to claim 57, characterized by

Scanning a measuring arm measuring device (17) for measuring 20 of the measuring object (15) by the calibrating measuring device (70),

Sending measured values (73) for calibrating the measuring device (10) to the control device (20) as a function of the sampling, and

25 - Calibration of the measuring device based on the measured values (73).