CN106767537B - A kind of monocular various dimensions profile scan device - Google Patents
A kind of monocular various dimensions profile scan device Download PDFInfo
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- CN106767537B CN106767537B CN201710164252.1A CN201710164252A CN106767537B CN 106767537 B CN106767537 B CN 106767537B CN 201710164252 A CN201710164252 A CN 201710164252A CN 106767537 B CN106767537 B CN 106767537B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
- G01B11/2518—Projection by scanning of the object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
- G01B11/254—Projection of a pattern, viewing through a pattern, e.g. moiré
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- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of monocular various dimensions profile scan devices, including two isosceles right-angle prisms and objective table；One of right-angle surface of each isosceles right-angle prism is vertically arranged, and objective table is between two right-angle surfaces being vertically arranged, its contour surface does not stretch out another right-angle surface of the isosceles right-angle prism in the vertical direction when workpiece to be detected is put on the objective table；It is equipped with a word line structure light in the surface of objective table, the bright line for the "-" type that the word line structure light projects straight down is covered on workpiece for measurement；The video camera being connected with the end PC is additionally provided with immediately ahead of the objective table, the camera of the video camera can shoot the image of the bright line on the isosceles right-angle prism and workpiece for measurement surface comprehensively.The side profile of workpiece can be projected top surface profile by the device, can carry out the visual angle design of video camera to realize various dimensions profile scan and meet contour equidistant high-precision vision imaging demand simultaneously.
Description
Technical field
The invention belongs to piece surface contour detecting technical field more particularly to a kind of irregular contours in cross-sectional area
With volume detection device.
Background technique
In daily production and life, the feelings for needing on-line checking product stereo profile and online cutting of fixed quantity are frequently encountered
The bulks object equivalent point such as condition, such as the cutting of noble metal cutting of fixed quantity, the online cutting of fixed quantity of irregular glass bar, bread quantitative
Zero application.Existing equipment will complete the work of this respect, usually require the item for first work piece being made into standard section product
Then shape is split the purpose to realize equivalent cutting by specified length again, the defect of this mode is that error is larger, outstanding
It is the bar shaped for being difficult to be processed into standard section product for fragile material, and processing is in strip this procedure itself and can generate centainly
Cost, perfect there are also additional many process requirements, therefore the above-mentioned object processed at present needs to count again mostly
Amount and screening.And mainly there is following two aspect in the non-contact visual detection equipment of existing market, first is that due to general
The amplification factor of machine visual lens causes the field angle of certain aperture less than 1, this for observing in the longitudinal direction
For rectangular bar, be the pattern appearance information that can not see left and right side face, a kind of solution is along sight
The reflective mirror at certain inclination angle is installed in direction in the left and right sides respectively, but due to light path overall length is inconsistent can not be burnt in the same camera lens
See that equally clearly image, image distance have big difference on face；On the other hand, for those surface undulations less (concave-convex unobvious)
But to carry out Precise outline scanning three-dimensional components (such as cross section in rectangle steel bar or other with the more of a variety of faces
Face body structure) for, one surface extends transversely, and the surface (two sides) of its two sides extends longitudinally, and causes pole
Big imaging sensor breadth waste, one of them most direct influence is exactly that image frame per second/temporal resolution is caused to drop significantly
Low, this is huge defect for the industrial part that those need quickly to detect, and will seriously affect its final detection knot
Fruit, because the frame per second and resolution ratio of imaging sensor are inversely under same band.
Summary of the invention
It is an object of the invention to solve above-mentioned technical problem, a kind of monocular various dimensions profile scan device, the dress are provided
Top view can be projected for the side view of workpiece by setting, and realize various dimensions profile scan by carrying out the visual angle design of video camera,
And meet contour equidistant high-precision vision imaging demand simultaneously.
Technical scheme is as follows:
A kind of monocular various dimensions profile scan device, including two isosceles right-angle prisms and objective table；Each isosceles right angle
One of right-angle surface of prism is vertically arranged, and the objective table is between two right-angle surfaces being vertically arranged, workpiece to be detected
Its contour surface does not touch another right-angle surface of the isosceles right-angle prism in the horizontal direction when being put on the objective table；
It is equipped with a word line structure light source in the surface of the objective table, the word line structure light source projects straight down
"-" type bright line be covered on workpiece for measurement and prism levels setting upper surface on；
It is additionally provided with the video camera being connected with the end PC in the upper front of the objective table, the camera of the video camera can be comprehensive
Shoot the image of the bright line on the isosceles right-angle prism and workpiece for measurement surface.
Further, the monocular various dimensions profile scan device has following Parameter Conditions:
Wherein, Δ h=H, Δ h are the virtual image of the side light bright line for the workpiece seen by prism with respect to isosceles right angle
The height on prism bottom edge, H are height of the upper surface of measured workpiece relative to isosceles right-angle prism bottom edge, and d is isosceles right-angled edge
The right angle edge lengths of mirror, n are the refractive index of isosceles right-angle prism, and θ is the visual angle of video camera, LfTo be erected described in workpiece and corresponding side
Horizontal interval distance between the right-angle surface for the isosceles right-angle prism being directly arranged.
Conversely, when the design object for having specific isosceles right-angle prism and height to be measured phase can be designed by following relationship
The installation oblique angle of machine, the i.e. visual angle of video camera are designed calculating:
Further, a piano convex cylindrical lens, institute are equipped between two isosceles right-angle prisms and a word line structure light source
The flat mirror for stating piano convex cylindrical lens is parallel with the horizontally disposed right-angle surface of isosceles right-angle prism.Or the two of a wordline
Two panels reflecting mirror is installed close to the position of prism in a diverging direction respectively, and the angle α of reflecting mirror and laser optical axis is less than sharp
The half of light divergence angle beta and be greater than 0, i.e. 0 < α < β/2.
Further, the word line structure light source is colored structures light source, in the upper surface of two waist right-angle prisms, i.e.,
The filter for only allowing a kind of light of color to penetrate is respectively equipped between two isosceles right-angle prisms and the piano convex cylindrical lens
Light microscopic, and the color of light that two optical filterings are penetrated is different；Or directly by being plated on two isosceles right-angle prism surfaces
Film realizes colour filter function.
Further, the right-angle surface that the left and right sides of the objective table are vertically arranged with isosceles right-angle prism two separates.
Further, the isosceles right-angle prism is embedded in the mounting base of rectangular-shape, by described in the mounting base
The side of objective table is equipped with 45 degree of inclined surface, and the inclined-plane of the isosceles right-angle prism is fitted closely with 45 degree of inclined surface.
Beneficial effects of the present invention: three facial contours of workpiece are projected same water using isosceles right-angle prism by the present invention
In average face, so as to Image Acquisition, acquisition is more clear accurate image, and further will left and right two using contour design
The contour images of side project in the plane coplanar with workpiece top surface, not only by the contour images (bright line) in three faces at one
On face the height change range of very little or without concentration (coplanar) in the range of difference in height absorb, solve digital camera multidimensional
Degree, the especially excessive problem of geometric area shared by orthogonal dimensions image, improve digital camera photosensitive unit utilization rate,
And then realize and improve digital camera frame per second/time precision purpose, it is dynamic to improve by improving video camera frame per second/time precision
The speed and precision of state detection；And the image light bright line of all contoured surfaces coplanar collinearly also achieve all profiles to be detected and arrives
The equivalent air path of camera lens is equidistant, i.e., equivalent total light of the bright line that each profile point projects to camera lens
Cheng Xiangtong reduces the vision algorithm difficulty of information extraction to further improve the image-capturing resolution of camera picture, improves dynamic
The speed and precision of state detection.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the cross-sectional view that the present invention splits from a word line structure light source.
Fig. 3 is the position view of human eye bright line observed by side when detecting qualified workpiece.
The image schematic diagram of light line position shown in Fig. 3 that Fig. 4 arrives for shot by camera.
Fig. 5 is the position signal of human eye bright line observed by side when there is rough workpiece on detection surface
Figure.
The image schematic diagram of light line position shown in Fig. 5 that Fig. 6 arrives for shot by camera.
Fig. 7 be human eye from side gradually change visual angle when bright line change in location schematic diagram.
Fig. 8 is the schematic diagram deleted in Fig. 7 after the profile hidden line (dotted line) of each component.
The image schematic diagram of the variation of light line position shown in Fig. 7 that Fig. 9 arrives for shot by camera.
Figure 10 is contour, the equidistant bright line schematic diagram that video camera takes.
Figure 11 is the structural schematic diagram of the invention equipped with mounting base.
Figure 12 is the cross-sectional view that the present invention equipped with mounting base splits from a word line structure light source.
Figure 13 is that parameter derives optical schematic diagram.
Figure 14 is the schematic structural view of the invention equipped with piano convex cylindrical lens.
Figure 15 is the schematic structural view of the invention equipped with reflecting mirror.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
Present invention will be further explained below with reference to the attached drawings and examples:
As shown in Fig. 1-2, a kind of monocular various dimensions profile scan device, including two isosceles right-angle prisms 4 and objective table
5；One of right-angle surface of each isosceles right-angle prism 4 is vertically arranged, and the objective table 5 is located at two right-angle surfaces being vertically arranged
Between, workpiece 6 to be detected is put into its contour surface when on the objective table 5 should be lower than the isosceles right-angled edge in the vertical direction
Another right-angle surface of mirror 4 does not expose the horizontally disposed right-angle surface of isosceles right-angle prism 4, to guarantee the two of workpiece for measurement 6
Side profile light can perpendicular projection in the right-angle surface that isosceles right-angle prism 4 is vertically arranged.Generally, workpiece height is rib
Half of mirror height or so can make video camera obtain preferable observed bearing.
Be equipped with a word line structure light source 7 in the surface of the objective table 5, a word line structure light source 7 can for single or
A plurality of chroma clear rester or lines laser, such as "-" type laser are widely used in ready-made clothes laser positioning, clothes buttoning point light source
Positioning, the positioning of fabric cutter fabric dividing Auxiliary Marking, clothes flanging straight line laser etc., can inspire a visible straight line threadiness speck
The bright line of (bright line), the "-" type that the word line structure light source 7 projects straight down is covered on workpiece for measurement 6 and isosceles
The upper surface (horizontally disposed right-angle surface) of right-angle prism 4, wherein being projected onto work to be measured by the laser rays that prism 4 is totally reflected
The side of part.
The video camera 8 being connected with the end PC (not shown), the video camera are additionally provided in the front of the objective table 5
8 camera can shoot the image of the bright line on 6 surface of the isosceles right-angle prism 4 and workpiece for measurement comprehensively.
Such as (convenient for visual representation, herein to include being all made of human eye in subsequent embodiment in certain side position shown in 3-4
Set image taken by the image and video camera 8 observed and compare demonstration), workpiece for measurement 6 is a rectangular-shape
Steel bar, when the top surface of steel bar and the equal continuous formation of left and right sides, when the defect of no recess, protrusion etc, as shown in figure 3,
Operator stands when left front of the invention is seen, divides in workpiece top surface and isosceles right-angle prism 4 by the upper surface of the side of workpiece
There is not a red bright line, wherein the projection light bright line on workpiece top surface 1 is the first bright line 100, workpiece left side
Profile projection light bright line is the second bright line 200, and the projection profiles light line of workpiece right side 3 is third light line 300.Herein
It should be noted that the position as shared by operator and locating figure difference, cause human eye visual angle different, the light line
It can be the inside being observed in isosceles right-angle prism 4 by the side of workpiece, and be in isosceles right-angled edge under most of visual angles
The inside of mirror 4 occurs, and the bright line on isosceles right-angle prism 4 and the bright line of workpiece top surface are in upper and lower parallelly distribute on, according to
The difference at visual angle and isosceles right-angle prism 4 and workpiece size, the bright line 100 of the first of workpiece top surface 1 can be at top can also
It is below.And the position of bright line taken by video camera 8 is as shown in figure 4, by visual angle at this time this moment, the first bright line
100 are located at the front side of the second bright line 200 and third light line 300 close to the position of video camera 8.No matter human eye either images
Machine 8 is with which kind of view, observed or take as long as defect of the above three surface of workpiece without recess or convex type
Three bright equal continuously smooths of line it is free of discontinuities.And when detected workpiece surface has drawbacks described above, as shown in figure 5, work
There are pit 11, flange 12 on part top surface 1, workpiece right side 3 fluted 31, convex block 32, then correspondingly taken by the video camera 8
Picture on there is breakpoint septal line as shown in FIG. 6, corresponding light line interruption is discontinuous, the corresponding defects of the first broken string 110
At pit 11, at the corresponding defect flange 12 of the second broken string 120, at the corresponding defect groove 31 of third broken string 310, the 4th broken string 320
At corresponding defect convex block 32.
It when in use, can be by workpiece with certain speed movement or the mobile profile to entirely need to detect of camera
The bright line that face is projected shoots imaging.And in some dot on detecting profile or linear character, a word line structure
It can not relatively moved between light source 7 and workpiece, only shoot the bright line at that point/cable architecture to be detected,
Certain this detection error is slightly bigger, is suitble to the qualitative detection of local configuration.
Further, the monocular various dimensions profile scan device has following Parameter Conditions:
Wherein, Δ h is the virtual image for the side surface of workpiece light line seen by prism with respect to isosceles right-angle prism bottom edge
Height.The bright line 100 of projection light bright line first on workpiece top surface 1, profile projection light the second light of bright line of workpiece left side
300 three of projection profiles light line third light line of bright line 200, workpiece right side 3 is in sustained height position, also i.e. by work
The contour line in three faces that part is not in same plane is projected on a face completely (on workpiece top surface 1).Above-mentioned d is isosceles
The right angle edge lengths of right-angle prism 4, n are the refractive index of isosceles right-angle prism, and θ is the visual angle of video camera, LfFor workpiece and accordingly
Horizontal interval distance between the right-angle surface being vertically arranged described in side, this section of horizontal interval is unobstructed apart from interior spaciousness, is one section
Only with the air gap of air dielectric, parameter LfPrimarily to when workpiece being avoided to be placed on objective table 5, workpiece two sides with
The right-angle surface that the two of isosceles right-angle prism 4 are vertically arranged interferes collision and is arranged, when workpiece is placed on 5 centre of objective table,
L positioned at left sidefEqual to the L on right sidefValue, when workpiece two sides are in contact with the right-angle surface being vertically arranged, Lf=0.
When the visual angle of human eye gradually changes to a direction rotation, as shown in Figure 7 and Figure 8, it can be seen that isosceles right angle
Bright line on prism 4 gradually moves down, i.e., all bright lines are moved down to the bottom of isosceles right-angle prism 4 (conversely, anti-
To rotation human eye visual angle, above-mentioned light line is gradually risen).Correspondingly, in above-mentioned change procedure, video camera 8 is also done correspondingly
Visual angle rotation, the position moving process of taken bright line is as shown in figure 9, gradually move forward, to the mirror of video camera 8
Head direction is close.The first bright line 200 of bright line 100, second and third light line 300 shown in Fig. 7-9 respectively have four,
Respectively indicate visual angle it is rotationally-varying when, the change location of bright line, when transforming to Article 4 light line y, the second bright line 200
It is just coplanar contour with the first bright line 100 with third light line 300；I.e. this moment Δ h=H, H are the upper surface phase of measured workpiece
(upper surface of bright line and measured workpiece that the profiles of two sides is cast out is reached for the height on isosceles right-angle prism bottom edge
Contour requirement).Certainly, in practice, contour, or the height difference control between bright line can be determined whether as needed
Within the scope of great.
Referring to Figure 13, the above-mentioned parameter relational theory of contour design is derived as follows:
1. the basis of contour design is by the resulting virtual image height of object under strabismus high refractive index medium.
2. virtual image height is got based on light path overall length, and the practical optical path length of high refractive index medium and video camera 8
The equivalent optical path of video (virtual image) is different, the i.e. light path of the virtual imageWherein Lv be the optical path length of the virtual image (i.e. etc.
Imitate air light path), Lm is practical optical path length in medium, and n is the refractive index of medium.
3. used in the present invention is 45 ° of isosceles right-angle prisms 4 of standard, in medium on the one hand optical path length Lm depends on being situated between
The height and width of matter itself, it is on the other hand related to the visual angle of video camera, according to refractive index formula(n is refraction
Rate, θ are camera angles, are also equal to incidence angle, and δ is refraction angle), we are availableDue to this hair
Bright camera angles θ is that the cross section of central axes and two isosceles right-angle prisms 4 based on video camera 8 rotates formed angle,
Angle i.e. between the camera lens central axes of video camera 8 and the cross section of isosceles right-angle prism 4, that is, it is equal to incidence angle θ, and it is vertical
When the end face observation of isosceles right-angle prism 4, the practical optical path length in prism is consistently equal to height (width) d of prism, so,
The practical optical path length rotated around the end face (cross section) of isosceles right-angle prism 4Therefore, the light path of the step 2 virtual image
4. the equivalent air optical path length Lv obtained according to third step, we obtain position and the optical path length such as figure of the virtual image
13, at this point, this workpiece in 8 bottoms of camera shooting has improved the height of Δ h in video camera 8, and this height is and takes the photograph
Camera view angle theta is relevant again, i.e.,L in this formulafBe vertical plane of the workpiece apart from prism two sides it
Between air-gap width.It may be noted that Figure 13 show Lf=0 the case where, i.e. workpiece two sides, are connect with two right-angle surfaces of prism
Touching, so.Herein, above formula isAnd prism surface should not be abraded in view of being detected workpiece, so
There are gap L f, our design image height h should be with d-L at this timefIt is equal, i.e. the height of the virtual image, then for video camera 8 and its camera lens
For, apart from the vertical right-angle surface L of prismfThe width at place is with the height of measured workpiece be it is contour and equidistant, as shown in Figure 10.
Further, according to prism wide/high d and design gaps Lf, pass through formulaIt is counter to be pushed away
It calculates, the design angle of camera angles can be obtained
Wherein, equally, θ is the visual angle of above-mentioned video camera, and H is height of the upper surface of measured object apart from prism bottom edge, n
For the refractive index of isosceles right-angle prism, d is the right angle edge lengths of isosceles right-angle prism 4, calculates video camera 8 using the formula
Mounting inclination angle degree, with meet the workpiece of different light path overall lengths be observed surface with equal equivalent away from；To solve
The object distance difference for being observed face of different light path overall lengths causes problem that cannot be confocal, and makes being observed for different light path overall lengths
Surface has equally clearly picture quality and identical amplification factor by the same camera lens.It, can root in specific design
According to need flexible choice be by above formula calculate using change video camera 8 tilt angle or change isosceles right-angle prism 4
Refractive index or height width size realize the dynamic detection speed and precision of video camera 8.
Further, as shown in figure 14, it is flat that one is equipped between two isosceles right-angle prisms 4 and a word line structure light source 7
The flat mirror of convex cylindrical lens 13, the piano convex cylindrical lens 13 is equal with the horizontally disposed right-angle surface of isosceles right-angle prism 7
Row, i.e., piano convex cylindrical lens 13 are parallel with horizontally disposed right-angle surface.The design is mainly for the word for having certain angle of divergence
Cable architecture light source 7 places a piano convex cylindrical lens between isosceles right-angle prism 4 and a word line structure light source 7, the piano convex cylindrical
Lens 13 are used for there is the structure light of certain angle of divergence to be collimated or carried out angle of divergence adjustment, to pass through isosceles right-angle prism
A 4 wordline projects light energy enables video camera to observe entire side completely to the workpiece bottom edge for being equal to or less than prism bottom edge
The profile in face, the scattering of the light mainly issued in view of a word line structure light source 7.
It, can also be in a word line structure light except above-mentioned setting piano convex cylindrical lens are come in addition to reaching above-mentioned purpose of design method
Reflecting mirror 14 is installed close to the position two sides of isosceles right-angle prism 4 as shown in figure 15 in two diverging directions in source 7 respectively, this is anti-
Penetrating mirror 14 can be reflected into the light that a word line structure light source 7 issues on isosceles right-angle prism 4, reflecting mirror 14 and laser optical axis
Angle α is less than the half of the divergence angle beta for the light that laser is issued, and is greater than 0, i.e. 0 < α < β/2.
It further, when used word line structure light source 7 is colored structures light source, that is, include multiple color
It is light time, more accurate clear in order to make to detect, one, which is respectively equipped with, in all right-angle surfaces of two isosceles right-angle prisms 4 only allows one
The optical filtering (not shown) that the light of kind of color penetrates, and the color of light that two optical filterings are penetrated is different.Or
Directly by the way that in two 4 surface coatings of isosceles right-angle prism, which only transmits the light of certain color, to realize colour filter function
Energy.The design be because, for the material for having certain transmitance, such as glass, the monochromatic color knot of the word line structure gloss
When structure light, surface reflection and opposite are thrown incoming light and all can all be observed by video camera by prism, it is difficult to them are distinguished,
And only workpiece surface reflection light because structural information be completely only we needs, so to left and right two pieces of isosceles right-angled edges
Mirror 4 needs to be respectively adopted the filter (light of the corresponding a certain color of a certain wavelength) of different wave length, makes two pieces of isosceles right-angle prisms 4
The light of middle injection is two different pure color light, while because the filter of opposite can be prevented transmitted through the different colours light come
Line and by this side same color reflection light to make the only complete surface reflection of message structure that video camera receives
Line；Therefore, two optical filterings are respectively arranged on above two isosceles right-angle prisms 4 and filter light source, which type of color realized
Enter also only have the light of this color that can come out from it, solves the cross-interference issue that transmitted light is formed in opposite.
Further, as shown in Figure 10-11, the objective table 8 be cross section be in rectangle cuboid bloom, described two
A isosceles right-angle prism 4 is about 5 mirror symmetry of objective table, in order to determine the L at left and right sidesfIt is equal, convenient for meter
It calculates and realizes contour equidistant design.
Further, the isosceles right-angle prism 4 leans on institute in the mounting base 9 in the mounting base 9 of rectangular-shape
The side for stating objective table 5 is equipped with 45 degree of inclined surface, and the inclined-plane of the isosceles right-angle prism 4 is closely pasted with 45 degree of inclined surface
It closes, to install isosceles right-angle prism 4, fastening bolt 10 can be also set on the outside of 9 end face of mounting base, it is straight for holding out against isosceles
Angle prism 4, two right-angle surfaces being vertically arranged of isosceles right-angle prism 4, which also can choose, stretches out except the mounting groove of mounting base 9.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (7)
1. a kind of monocular various dimensions profile scan device, it is characterised in that: including two isosceles right-angle prisms and objective table；Each
One of right-angle surface of isosceles right-angle prism is vertically arranged, the objective table between two right-angle surfaces being vertically arranged, to
Its contour surface does not stretch out the another of the isosceles right-angle prism in the vertical direction when detection workpiece is put on the objective table
Right-angle surface；
The surface of the objective table be equipped with a word line structure light source, the word line structure light source project straight down one
The bright line of font is covered on workpiece for measurement；
It is additionally provided with the video camera being connected with the end PC in the upper front of the objective table, the camera of the video camera can be shot comprehensively
The image of the isosceles right-angle prism and the bright line on workpiece for measurement surface；The monocular various dimensions profile scan device tool
Standby following Parameter Conditions:
Wherein, Δ h=H, Δ h are height of the virtual image with respect to isosceles right-angle prism bottom edge for the bright line seen by prism
Degree, H are height of the upper surface of measured workpiece relative to isosceles right-angle prism bottom edge, and d is the right angle side length of isosceles right-angle prism
Degree, n are the refractive index of isosceles right-angle prism, and θ is the visual angle of video camera, LfIt is perpendicular for side surface of workpiece and corresponding side isosceles right-angle prism
Horizontal interval distance between the right-angle surface being directly arranged.
2. monocular various dimensions profile scan device according to claim 1, it is characterised in that: the monocular various dimensions profile is swept
Imaging apparatus can design the visual angle of video camera as follows:
3. monocular various dimensions profile scan device according to claim 1, it is characterised in that: two isosceles right-angle prisms with
A piano convex cylindrical lens, the flat mirror and isosceles right-angle prism of the piano convex cylindrical lens are equipped between one word line structure light source
Horizontally disposed right-angle surface is parallel.
4. monocular various dimensions profile scan device according to claim 3, it is characterised in that: the word line structure light source is
Colored structures light source is respectively equipped with one between two isosceles right-angle prisms and the piano convex cylindrical lens and only allows a kind of color
The optical filtering that penetrates of light, and the color of light that two optical filterings are penetrated is different.
5. monocular various dimensions profile scan device according to claim 1, it is characterised in that: the left and right sides of the objective table
The right-angle surface that face is vertically arranged with isosceles right-angle prism two separates.
6. monocular various dimensions profile scan device according to claim 5, it is characterised in that: the isosceles right-angle prism is embedding
In in the mounting base of rectangular-shape, 45 degree of inclined surface are equipped with by the side of the objective table in the mounting base, the isosceles are straight
The inclined-plane of angle prism is fitted closely with 45 degree of inclined surface.
7. monocular various dimensions profile scan device according to claim 1, it is characterised in that: in two pieces of isosceles right-angle prisms
Two sides are separately installed with the reflecting mirror that can be reflexed to the light that a word line structure light source projects on isosceles right-angle prism, described anti-
The angle for penetrating mirror and laser optical axis is α, and 0 < α < β/2, β are the angle of divergence of a word line structure light source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710164252.1A CN106767537B (en) | 2017-03-20 | 2017-03-20 | A kind of monocular various dimensions profile scan device |
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| CN201710164252.1A CN106767537B (en) | 2017-03-20 | 2017-03-20 | A kind of monocular various dimensions profile scan device |
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