WO2016198522A1

WO2016198522A1 - Driver assistance system for a motor vehicle, motor vehicle and method

Info

Publication number: WO2016198522A1
Application number: PCT/EP2016/063159
Authority: WO
Inventors: Lin Lin; Peter Horvath; Thomas Schuler
Original assignee: Valeo Schalter Und Sensoren Gmbh
Priority date: 2015-06-10
Filing date: 2016-06-09
Publication date: 2016-12-15
Also published as: DE102015109160A1

Abstract

The invention relates to a driver assistance system (2) for a motor vehicle (1) for monitoring a surrounding area (3) of the motor vehicle (1) having a vehicle-side optical detection device (4) for outputting an optical signal into the surrounding area (3) and for receiving the signal reflected in the surrounding area (3), and having a control device (7) for operating the detection device (4) in at least two operating modes (8, 9), wherein the control device (7) is configured to operate the detection device (4) in a first operating mode (8) with a first resolution capability (10) for detecting the surrounding area (3) with a first resolution (13), and to operate the detection device (4) in a second operating mode (9) with a second resolution capability (11) which is higher compared to the first resolution capability (10), in order to detect the surrounding area (3) with a second resolution (16) which is higher compared to the first resolution (13). The invention also relates to a motor vehicle (1) and to a method.

Description

Driver assistance system for a motor vehicle, motor vehicle and method

The invention relates to a driver assistance system for a motor vehicle for monitoring an environmental area of the motor vehicle, having an optical detection device on the vehicle side for emitting an optical signal into the surrounding area and for receiving the signal reflected in the surrounding area and a control device for operating the detection device in at least two

Modes of operation. The invention also relates to a motor vehicle and a method for monitoring a surrounding area.

Driver assistance systems are already known in many ways from the prior art. Such driver assistance systems may be, for example, a parking assistant, a lane departure warning system or a distance cruise control. The can

Driver assistance systems either support a driver of the motor vehicle only by issuing warning signals, for example, or in emergency situations

Engage drive train of the motor vehicle, or completely take over the driving of the motor vehicle itself. For this purpose, an environmental region of the motor vehicle is usually monitored, for example by means of optical detection devices. Such an optical detection device may for example be a laser scanner. That such a laser scanner can be operated in different operating modes, which are selected manually by a driver, is known from EP 2 204 672 B1.

It is an object of the present invention to provide a surrounding area of a

Motor vehicle situationally particularly flexible and reliable to capture.

This object is achieved by a driver assistance system, a

Motor vehicle and a method according to the independent claims solved.

An inventive driver assistance system for a motor vehicle is used for

Monitoring a surrounding area of the motor vehicle. The

Driver assistance system comprises a vehicle-side optical detection device for emitting an optical signal in the surrounding area and for receiving the signal reflected in the surrounding area and a control device for

Operating the detection device in at least two modes of operation. In addition, the control device is adapted to the detection device in a first

Operating mode with a first resolving power for detecting the Operate surrounding area with a first resolution and operate the detection device in a second operating mode with a higher resolution compared to the first resolution second resolution for detecting the surrounding area with a higher compared to the first resolution second resolution.

The driver assistance system serves to monitor the surrounding area of the motor vehicle, in particular to detect objects in the surrounding area of the motor vehicle. The surrounding area of the motor vehicle may, for example, be subdivided into a vicinity close to the motor vehicle and adjacent to the motor vehicle and spaced apart from one another to the motor vehicle. In the remote area, it is important, for example, that objects and their distance from the motor vehicle are detected quickly and reliably. In the vicinity, it is important, for example, that objects, in particular their dimensions or spatial dimensions, as well as their distance from the motor vehicle, are detected particularly accurately. This means that the near range should be detected at a higher resolution than the far range.

According to the invention, the control device, which, for example, by a

vehicle-side electronic control unit may be formed, adapted to change a resolution capability of the detection device by the

Control device operates the detection device in different operating modes. In order to provide the first, lower resolution, for example for the long range, the control device operates the detection device in the first operating mode. In order to provide the second, higher resolution, for example for the near range, the control device transfers the detection device into the second operating mode.

By means of the control device, therefore, the detection device is advantageously configured in a particularly flexible manner and can be adapted particularly well and according to the situation to the respective application of the driver assistance system in terms of its resolving power. So it is not necessary in an advantageous manner, several

To provide detection devices with different resolving power.

Particularly preferably, the detection device is adapted to the

To scan the surrounding area with the optical signal. The control device is designed to specify a first sampling rate for the detection device for providing the first resolution capability of the detection device, and to provide the detection device second resolution capability of the detection device to specify a higher compared to the first sampling rate second sampling rate for the detection device. In other words, this means that the control device is designed to set the sampling rate or the sampling frequency at which the detection device uses the

Scans surrounding area, change. The higher the resolution capability of the detection device is set, the higher the sampling rate or the sampling frequency for the detection device by the

Control device can be specified. A sampling rate can be changed particularly easily by predetermining a corresponding control signal by the control device for the detection device, whereby the resolution can be adjusted easily and quickly.

Preferably, the control device is designed to provide the detection device for providing a detection area oriented along a vehicle longitudinal direction in the first operating mode with a first horizontal and / or vertical

To operate opening angle and operate in the second operating mode for providing the detection range with a larger compared to the first horizontal and / or vertical opening angle second horizontal and / or vertical opening angle. The control device is thus designed in addition to a

Resolution of the detection device and the opening angle and thus to change the horizontal and / or vertical extent of the detection area. The detection device, which is arranged in its intended installation position, for example in a front region of the motor vehicle and whose detection range is aligned along the vehicle longitudinal direction, has a horizontal, along a vehicle transverse direction oriented opening angle and a vertical, along a vehicle vertical direction oriented opening angle. The horizontal opening angle defines a horizontal extent of the detection area along the vehicle transverse direction. The vertical opening angle defines a vertical extension of the detection area along the vehicle vertical direction. At least one of the opening angles is changed in the various operating modes by the control device. Thus, in the first operating mode, for example in the monitoring of the far range, the first, narrow horizontal and / or vertical opening angle is predetermined, so that the detection area extends as a narrow cone substantially in the vehicle longitudinal direction, in order, in particular, to detect more distant objects. In the second operating mode, for example in the monitoring of the near range, the horizontal and / or the vertical

Opening angle increased, so that the cone in the horizontal direction and / or in vertical direction stretches. In particular, by increasing the horizontal opening angle in the second operating mode, a lateral surrounding area of the motor vehicle can also be monitored. This allows objects in the lateral

Surrounding area to be detected particularly well and with a high resolution.

It can be provided that the control device is designed to, the

Detection device in the first operating mode for providing an in

Operate vehicle longitudinal direction oriented first range and in the second operating mode for providing a vehicle longitudinally oriented, in

Compared to the first range lower second range to operate. The control device is thus designed, in addition to the resolution, the range and thus a length of the detection area along the

To change the vehicle longitudinal direction. The range is an extension of the respective detection range along the vehicle longitudinal direction. In the first operating mode, in which, in particular, far-away objects are to be detected, the first, larger range and thus a long along the vehicle longitudinal direction detection range are given. In the second operating mode, in which, in particular, objects located near the motor vehicle are to be detected, the second, lower range and thus one along the

Vehicle longitudinal directions shorter detection range specified. By changing the various parameters of the detection device, the driver assistance system is designed to be particularly flexible.

According to one embodiment of the invention, the driver assistance system has at least two assistance functions. The control device is designed to provide the first operating mode for a first assistance function of the driver assistance system and for providing the second operating mode for a second assistance function of the driver assistance system. The driver assistance system is designed to monitor the surrounding area. The control device is now designed to adapt the operating mode of the detection device to the respective assistance function. The assistance functions may, for example, differ from one another in that different locations in the surrounding area are to be monitored and / or that the surrounding area is to be monitored with different accuracies.

Thus, the driver assistance system in the first assistance function can be designed, for example, for automatically keeping the motor vehicle distance on a highway. The first assistance function can therefore be a Abstandstempomatfunktion the

Driver assistance system. In the second assistant function that can

Driver assistance system, for example, to assist the driver in a

Einparkvorgang be configured. The second assistant function can therefore be a

Parking assistance function of the driver assistance system. In this case, for example, when Abstandstempomat only the presence of the object and the distance of the object, ie a vehicle ahead and its distance to be detected. Spatial dimensions or dimensions of the object are of minor interest. Thus, it is sufficient to operate the detection device in the first operating mode, in which the detection device the

Surrounding area detected at the lower resolution. With the parking assistant, on the other hand, it is important to additionally record spatial dimensions and dimensions of the object in order, for example, to prevent an unintentional streaking of the object when parking or a collision of the motor vehicle with the object. This is the

Detection device transferred to the second operating mode, in which the

Detection device detects the surrounding area with the higher resolution.

In addition, the opening angle and / or the range can be changed. From this embodiment, there is the advantage that a detection device can be used for a plurality of assistance functions and the detection device can be flexibly adapted to the respective assistance function.

The driver assistance system preferably has a sensor device for measuring a current speed of the motor vehicle. The control device is designed to operate the detection device as a function of the detected speed in the respective operating mode. In other words, the

Modified operating mode as a function of the detected speed of the motor vehicle. Based on the detected speed provided by the sensor device, the control device can quickly and easily specify the assigned operating mode for the detection device.

In this case, the control device is preferably designed to operate the detection device in the first operating mode when the detected speed at least exceeds a predetermined threshold value, and to operate the detection device in the second operating mode when the detected speed falls below the predetermined threshold value. The invention is based on the finding that, especially at high speeds, for example in a

Highway travel of the motor vehicle, the environment area is to be detected quickly, in particular, that objects are located in the surrounding area and how far away these objects are from the motor vehicle. At low speeds, for example when parking, the environmental area should be particularly accurate, especially with exact positions and dimensions of the objects to be detected. For this purpose, the threshold for the speed is given, from which the

Detection device between the respective operating modes should change. It is also possible to predefine a plurality of threshold values, so that a resolution capability, but also a spatial extent and position of the detection area, for example, can be adjusted stepwise. The threshold values can be stored, for example, in a list on the basis of which, depending on the detected speed, the corresponding operating mode can be selected and by the

Control device for the detection device can be provided.

It can be provided that the control device is designed to specify an angle between at least 0 ° and at most 10 ° as the first horizontal opening angle at a detected speed of more than 50 km / h and / or as the first vertical opening angle an angle between at least Specify 0 ° and at most 5 ° and specify at an acquired speed of at most 50 km / h as the second horizontal opening angle an angle between at least 1 1 ° and at most 60 ° and / or as the second v ertikale opening angle an angle between at least 6 ° and not more than 10 °. According to this

Embodiment thus increases the horizontal and / or vertical extent of the detection range at low speed, ie at speeds up to 50 km / h. The opening angles are thus in the second

Operating mode compared to the first operating mode of the detection device increases. Thus, at low speeds, in particular by increasing the horizontal opening angle, in addition the lateral surrounding area of the motor vehicle can be monitored. The horizontal and / or vertical extent can be increased continuously or stepwise as the speed decreases.

According to one embodiment, the driver assistance system is designed to detect and characterize the surrounding area of the motor vehicle. The

Control device is dependent on the characterization of

Environments area designed to provide the respective operating mode. The surrounding area is thus characterized here in terms of its spatial position or its configuration. Preferably, the control device is to designed to operate the detection device in the first operating mode, when the detected surrounding area as an area on a freeway for the

Motor vehicle was detected and characterized, and operate the detection device in the second mode of operation, when the surrounding area was detected and characterized as an area within a parking garage. On a highway, such as a highway or a highway, it is particularly important to detect vehicles in front, even far away. In this case, the first operating mode with the lower resolution capability for the detection device is provided on the expressway, in which additionally the opening angle can be reduced and / or the range can be increased. In a parking garage, which

For example, may have a variety of obstacles, the first

Operating mode provided with the greater resolution, in which additionally the opening angle can be increased and / or the range may be reduced. Thus, the detection device particularly flexible to the embodiment of

Adjusted to the surrounding area.

It can also be provided that the control device is designed to operate the detection device for detecting an object in the first operating mode, and to operate the detection device to detect the object again in the second operating mode after detecting the object. Here, therefore, the object in the surrounding area, for example, first in the far field,

For example, on a highway, recorded. The motor vehicle thereby moves towards the object and the detection device is transferred by the control device into the second operating mode, in which the detection device detects the object again, with the higher resolution. In other words, the object is fixed by the detection device. The driver assistance system is designed here to detect whether the driver of the motor vehicle reacts to the object. If

for example, the object in the second operating mode with the higher

Resolution is still detected, it can be performed for example by the driver assistance system automatic braking of the motor vehicle. The driver assistance system is thus designed to be particularly secure.

Preferably, the detection device is designed as a laser scanner with a light source and a deflection device for deflecting the light provided by the light source into the surrounding area, wherein the control device for operating the detection device in the respective operating mode for driving the

Deflection device is formed. The laser scanner includes as the light source For example, a laser, which is a laser beam, in particular in a

non-visible wavelength range, sent to the deflector. At the deflection of the laser beam is deflected into the surrounding area. For detecting the surrounding area, the deflecting device is driven to change its orientation, so that the laser beam is deflected in different directions into the surrounding area and thus the surrounding area is scanned. Both a resolution capability and a scanning range, ie a spatial extent and position of the detection area, can be influenced by the deflection device. Therefore, it is particularly advantageous to control the deflection of the detection device to change the operating modes of the detection device.

In this case, the deflection device is preferably designed as a resonantly operated deflection mirror, in particular as a MEMS mirror (MEMS - microelectromechanical system). The control device is designed to change a resonance frequency of the deflection mirror for changing the resolution and / or to change the deflection angle of a deflection amplitude of the deflection mirror and / or to change a range of motion of a rest deflection of the deflection mirror relative to a vehicle vertical direction. If, for example, the resolution is to be increased, then the sampling rate of the detection device can be increased by the

Deflection mirror is operated at a higher resonant frequency. In this case, the control device is adapted to this higher resonance frequency for the

Specify deflection mirror. To increase the opening angle is a

Displacement amplitude, ie a horizontal Auslenkamplitude and / or a vertical Auslenkamplitude of the deflection mirror changed. To change the range, the quiescent deflection of the deflection mirror is changed to the vehicle vertical direction. The quiescent deflection is a rest tilting of the deflecting mirror in the direction of a roadway of the motor vehicle. The more the deflection mirror is thus tilted in the direction of the roadway, the lower the range of the detection device. The range can also be changed by the pulse power of the laser.

The invention also relates to a motor vehicle with a driver assistance system. The motor vehicle is designed in particular as a passenger car.

The invention also relates to a method for monitoring a

Surrounding area, in which by means of a vehicle-side optical

Detection device, an optical signal along a transmission direction in a

Surrounding area of the motor vehicle is emitted and that in the Ambient area reflected optical signal is received and the detection device is operated in a first operating mode or in at least a second operating mode. In addition, in the first operating mode, the detection device is provided with a first resolution capability for detecting the

Operated ambient area with a first resolution and in the at least one second operating mode is operated with a larger resolution compared to the first resolution second resolution for detecting the surrounding area with a higher resolution compared to the first resolution.

The preferred embodiments presented with reference to the driver assistance system according to the invention and their advantages apply correspondingly to the motor vehicle according to the invention and to the method according to the invention.

With information "top", "bottom", "front", "rear", "horizontal", "vertical",

"Vehicle longitudinal direction" (6), "vehicle transverse direction", "vehicle vertical direction" (21), etc. are in accordance with the intended use and proper arrangement of the detection device on the motor vehicle and then at a in

Vehicle longitudinal direction of the motor vehicle observer given given positions and orientations.

Further features of the invention will become apparent from the claims, the figures and the description of the figures. The features and feature combinations mentioned above in the description as well as features and feature combinations mentioned below in the description of the figures and / or shown alone in the figures are not only in the respectively indicated combination but also in others

Combinations or alone, without departing from the scope of the invention. Thus, embodiments of the invention are to be regarded as encompassed and disclosed, which are not explicitly shown and explained in the figures, however, emerge and can be produced by separated combinations of features from the embodiments explained. Embodiments and combinations of features are also to be regarded as disclosed, which thus do not have all the features of an originally formulated independent claim.

Showing: Fig. 1 is a schematic representation of an embodiment of a

motor vehicle according to the invention;

Fig. 2 is a schematic representation of an embodiment of the

motor vehicle according to the invention with a detection device in a first operating mode in a plan view;

Fig. 3 is a schematic representation of the embodiment of the

motor vehicle according to the invention with a detection device in a second operating mode in a plan view;

Fig. 4 shows the embodiment of the motor vehicle according to FIG. 2 in one

Side view; and

Fig. 5 shows the embodiment of the motor vehicle according to FIG. 3 in one

Side view.

In the figures, identical and functionally identical elements are provided with the same reference numerals.

1 shows a motor vehicle 1 according to the invention with a driver assistance system 2, which is designed to monitor a surrounding area 3 of the motor vehicle 1. The driver assistance system 2 comprises an optical

Detection device 4, which is designed in the present case as a laser scanner. The optical detection device 4 is designed by means of a

Deflection device 20 to deflect an optical signal, in particular a laser beam provided by a laser beam in the surrounding area 3 and to receive the reflected signal on an object in the surrounding area 3 signal again. One

Detection area 5 of the optical detection device 4 is here in one

Vehicle longitudinal direction 6 oriented.

The driver assistance system 2 also has a control device 7, which is designed to operate the detection device 4 in a first operating mode 8 or in a second operating mode 9. In the first operating mode 8 is the

Control device 7 designed to operate the detection device 4 with a first resolution 10. In the second operating mode 9 is the Control device 7 is set to operate the detection device 4 with a higher resolution compared to the first resolving power 10 second power 1 1. This means that the detection device 4 in the first operating mode 8 detects the surrounding area 3 with a first resolution and in the second

Operating mode 9 detects the surrounding area 3 with a higher compared to the first resolution second resolution.

The operating modes 8, 9 are provided, for example, as a function of an assistance function of the driver assistance system 2. For example, the first operating mode 8 is provided when a remote area in the surrounding area 3 of FIG

Motor vehicle 1, for example, for a Abstandstempomatfunktion the

Driver assistance system 2, to be monitored. The second operating mode 9 is provided, for example, when a near zone in the surrounding area 3 of FIG

Motor vehicle 1, for example, a parking assistance function of

Driver assistance system 2, to be monitored. It can also be provided that the operating modes 8, 9 are provided as a function of a speed of the motor vehicle 1. For this purpose, the driver assistance system 2 may have a sensor device 12 for detecting the speed of the motor vehicle 1. For example, the first operating mode 8 is provided at high speeds, in particular above 50 km / h, and the second operating mode is provided at low speeds, in particular at most 50 km / h.

In the first operating mode 8, the surrounding area 3 of the motor vehicle 1 is to be detected quickly, in particular the presence of the object and a distance of the object to the motor vehicle 1, for example a preceding vehicle and its distance from the motor vehicle 1, are to be detected. Details, such as exact geometrical dimensions of the object, are of minor interest. In the second operating mode 9, however, the surrounding area 3 should be detected particularly accurately, in particular exactly geometrical expansions or

Dimensions and positions of the object in the surrounding area 3 of the

Motor vehicle 1.

2 shows the motor vehicle 1 in a plan view with the detection device 4 in the first operating mode 8. In this case, the detection device 4 of the

Control device 7 operated with the first resolution 10, so that the detection device 4 detects the surrounding area 3 with a first resolution 13. For this purpose, the control device 7 has a first sampling rate for the detection device 4 pretend. For specifying the first sampling rate, the control device 7

For example, the deflection device 20, which may be configured as a resonantly operated MEMS mirror, drive and a first resonant frequency for the

Define deflector 20. In addition, the control device 7 is designed to operate the detection device 4 in the first operating mode 8 for providing the detection area 5 along the vehicle longitudinal direction 6 with a first range 14 and with a first horizontal opening angle 15, for example between 0 ° and 10 °.

FIG. 3 shows the motor vehicle 1 in a plan view with the detection device 4 in the second operating mode 9. In this case, the detection device 4 with the second, compared to the first resolution capacity 10 larger second

Resolution 11 operated, so that the detection device 4 the

Surrounding area 3 detected with a higher compared to the first resolution 13 second resolution 16. For this purpose, the control device 7 can specify a higher second sampling rate for the detection device 4 than the first sampling rate. For predetermining the second sampling rate, the control device 7 can control, for example, the deflection device 20 and specify a higher second resonance frequency for the deflection device 20 than the first resonance frequency. In addition, the control device 7 is designed to allow the detection device 4 in the second operating mode 9 to provide the detection area 5 along the

Vehicle longitudinal direction 6 with a smaller compared to the first range 14 second range 17 and with a compared to the first horizontal

Opening angle 15 larger second horizontal opening angle 18, for example, operate between 11 ° and 60 °.

FIG. 4 shows the motor vehicle 1 according to FIG. 2 in a side view. The

Detection device 4 is operated by the control device 7 of the motor vehicle 1 in the first operating mode 8. The control device 7 controls the

Detection device 4 for providing the detection range 5 with a first vertical opening angle 19 and the first range 14 at. The first vertical opening angle 19 may be, for example, between 0 ° and 5 °. For providing the first horizontal opening angle 14 and the first vertical opening angle 19, a first deflection amplitude of the deflection device 20 in horizontal and vertical direction, ie in a vehicle transverse direction and in a vehicle vertical direction 21, can be predetermined To provide the first range 14, a first quiescent deflection for the deflection device 20 of the detection device 4 can be specified. In this case, the deflection device 20 is tilted relative to the vehicle vertical direction 21 by a first angle 22 in the direction of a roadway 23 of the motor vehicle 1. From this rest deflection or rest position, the deflection device 20 for deflecting the laser beam in the horizontal and vertical directions of the control device 7th

driven.

FIG. 5 shows the motor vehicle 1 according to FIG. 3 in a side view. The

Detection device 4 is operated by the control device 7 of the motor vehicle 1 in the second operating mode 9. The control device 7 controls the

Detection device 4 for providing the detection area 5 with a, compared to the first vertical opening angle 19 larger second vertical

Opening angle 24 and with the second range 17 at. The second vertical

Opening angle 24 may for example be between 6 ° and 10 °. For providing the second horizontal opening angle 18 and the second vertical opening angle 24, for example, a second deflection amplitude of the deflection device 20, which is greater than the first deflection amplitude, can be preset in the horizontal and vertical directions, ie in the vehicle transverse direction and in the vehicle vertical direction 21. The detection area 5 is thus widened in the second operating mode 9 in comparison to the first operating mode 8, in particular by increasing the horizontal opening angle 18. Thus, a lateral surrounding area of the motor vehicle 1 can also be monitored and objects can be reliably and reliably detected there.

To provide the second range 17, a second quiescent deflection for the deflection device 20 of the detection device 4 can be specified. In this case, the deflecting device 20 is related to the vehicle vertical direction 21 by a second angle 25, which is larger in comparison to the first angle 22, in the direction of the roadway 23 of FIG

Motor vehicle 1 tilted. In the second operating mode 9 of the detection device 4, the deflection device 20 is thus stronger in the direction of the roadway 23 of the motor vehicle

1 inclined than in the first operating mode 8. As a result, the range 17 of the detection range 5 is shortened and the detection range 5 is positioned closer to the motor vehicle 1.

The operating modes 8, 9 may depend on the driver assistance system

2 to be provided assistance function and / or depending on the speed of the motor vehicle 1 can be specified. It can also be provided that the Surrounding area 3 is characterized by the driver assistance system 2 and the operating mode 8, 9 is predetermined in dependence on the characterization of the surrounding area 3 by the control device 7. For example, the first

Operating mode 8 are given when the motor vehicle 1 on a

Expressway, such as a highway, and the second operating mode 9 are specified when the motor vehicle is in a parking garage.

The control device 7 can also be designed to operate the detection device 4 first in the first operating mode 8. If the detection device 4 has detected an object in this first operating mode 8, the control device 7 can transfer the detection device 4 into the second operating mode 9, in which the detection device 4 detects the object again, with the higher resolution 16. The object is thus fixed. Thus, the driver assistance system 2 can evaluate whether the driver of the motor vehicle 1 reacts to the object and if necessary intervene,

For example, the motor vehicle 1 automatically decelerate.

The invention thus shows that a detection device 4, in particular its detection range 5, dynamically, for example, to be provided

Assistance functions and / or a speed and / or to the surrounding area 3 can be adjusted.

Claims

Patent claims

Driver assistance system (2) for a motor vehicle (1) for monitoring a surrounding area (3) of the motor vehicle (1) with a vehicle-side optical detection device (4) for emitting an optical signal into the surrounding area (3) and for receiving the signal in the surrounding area (3 ) reflected signal and with a control device (7) for operating the

Detection device (4) in at least two operating modes (8, 9),

characterized in that

the control device (7) is designed to control the detection device (4) in a first operating mode (8) of the operating modes (8, 9) with a first

To operate the resolution (10) for detecting the surrounding area (3) with a first resolution (13) and to operate the detection device (4) in a second operating mode (9) of the operating modes (8, 9) with a resolution (10) compared to the first. higher second resolution (11) for detecting the surrounding area (3) with a higher second resolution (16) compared to the first resolution (13).

Driver assistance system

(2) according to claim 1,

characterized in that

the detection device (4) is designed to detect the surrounding area

(3) to sample with the optical signal, and the control device (7) is designed to provide the first resolution (13) with a first sampling rate for the

Detection device (4) and to provide the second resolution (16) to specify a second sampling rate for the detection device (4), which is higher than the first sampling rate.

Driver assistance system (2) according to claim 1 or 2,

characterized in that

the control device (7) is designed to provide the detection device (4) oriented in a vehicle longitudinal direction (6).

Detection area (5) in the first operating mode (8) with a first horizontal and / or vertical opening angle (15, 19) and in the second operating mode (9) to provide the detection area (5). to operate a second horizontal and/or vertical opening angle (18, 24) which is larger than the first horizontal and/or vertical opening angle (15, 19).

4. Driver assistance system (2) according to one of the preceding claims,

characterized in that

the control device (7) is designed to operate the detection device (4) in the first operating mode (8) to provide a first range (14) oriented in the longitudinal direction of the vehicle (6) and in the second operating mode (9) to provide a range in the longitudinal direction of the vehicle (6) oriented, lower second range (17) compared to the first range (14).

5. Driver assistance system (2) according to one of the preceding claims,

characterized in that

the driver assistance system (2) has a first assistance function and at least one second assistance function and the control device (7) is designed to provide the first operating mode (8) for the first assistance function and to provide the second operating mode (9) for the at least one second assistance function.

6. Driver assistance system (2) according to one of the preceding claims,

characterized in that

the driver assistance system (2) has a sensor device (12) for measuring a current speed of the motor vehicle (1) and the

Control device (7) is designed to control the detection device (4).

To operate depending on the detected speed in the respective operating mode (8, 9).

7. Driver assistance system (2) according to claim 6,

characterized in that

the control device (7) is designed to operate the detection device (4) in the first operating mode (8) when the detected speed at least exceeds a predetermined threshold value, and to operate the detection device (4) in the second operating mode (9), if the captured Speed falls below the specified threshold.

8. Driver assistance system (2) according to claim 7,

characterized in that

the control device (7) is designed to specify an angle between at least 0° and at most 10° as the first horizontal opening angle (15) at a detected speed of over 50 km/h and/or as the first vertical opening angle (19). To specify an angle between at least 0° and at most 5° and at a recorded speed of at most 50 km/h to specify an angle between at least 11° and at most 60° as the second horizontal opening angle (18) and/or as the second vertical opening angle (24) to specify an angle between at least 6° and a maximum of 10°.

9. Driver assistance system (2) according to one of the preceding claims,

characterized in that

the driver assistance system (2) is designed to detect and characterize the surrounding area (3), and the control device (7) is designed to provide the respective operating mode (8, 9) depending on the characterization of the surrounding area (3).

10. Driver assistance system (2) according to claim 9,

characterized in that

the control device (7) is designed to operate the detection device (4) in the first operating mode (8) when the detected surrounding area (3) has been detected and characterized as an area on a highway for the motor vehicle (1), and the Control device (7) is designed to

Detection device (4) to operate in the second operating mode (9) when the surrounding area (3) has been detected and characterized as an area within a parking garage.

11. Driver assistance system (2) according to one of the preceding claims,

characterized in that

the control device (7) is designed to operate the detection device (4) for detecting an object in the first operating mode (8), and after detecting the object, the detection device (4) for detecting the object again To operate the object in the second operating mode (9).

12. Driver assistance system (2) according to one of the preceding claims,

characterized in that

the detection device (4) is designed as a laser scanner with a light source and a deflection device (20) for deflecting the light provided by the light source into the surrounding area (3), the control device (7) for operating the detection device (4) in the respective Operating mode (8, 9) is designed to control the deflection device (20).

13. Driver assistance system (2) according to claim 12,

characterized in that

the deflection device (20) is designed as a deflection mirror, in particular as a MEMS mirror, and the control device (7) is designed to change a resonance frequency of the deflection mirror in order to change the resolution (13, 16) and/or to change an opening angle ( 15, 18, 19, 24) a

To change the deflection amplitude of the deflection mirror and / or to change a range (14, 17) to change a rest deflection of the deflection mirror

Vehicle vertical direction (21) to change.

14. Motor vehicle (1) with a driver assistance system (2) according to one of the

previous claims.

15. Method for monitoring a surrounding area (3) of a motor vehicle (1), in which an optical signal is emitted into the surrounding area (3) of the motor vehicle (1) by means of a vehicle-side optical detection device (4) and in the surrounding area (3) reflected optical signal is received and the detection device (4) in a first

operating mode (8) or in at least a second operating mode (9),

characterized in that

the detection device (4) is operated in the first operating mode (8) with a first resolution (10) for detecting the surrounding area (3) with a first resolution (13) and the detection device (4) in the second operating mode (9) with a compared to the first resolution power (10) larger second resolution (11) for detecting the

Surrounding area (3) is operated with a second resolution (16) that is higher than the first resolution (13).