System for calibrating driver assistance system of motor vehicle with optical device and calibration device

Abstract

The invention relates to an optical measuring system (12, 12a, 12b) which can be mounted on different types of calibration devices (2, 2a, 2b) for a motor vehicle driver assistance system (20), comprising a mechanical connection device (16, 16a, 16b) which is designed to mechanically connect the optical measuring system (12, 12a, 12b) to the calibration device (2, 2a, 2b); and an identification interface (28, 28a, 28b) which enables the optical measuring system (12, 12a, 12b) to determine the type of calibration device (2, 2a, 2b) on which the optical measuring system (12, 12a, 12b) is mounted.

Description

Technical Field

[0001] The present invention relates to an optical system and calibration apparatus for calibrating a driver assistance system in a motor vehicle, the driver assistance system being referred to below as a motor vehicle driver assistance system. Background Technology

[0002] In particular, calibration devices are used in workshop settings to calibrate sensors of driver assistance systems installed in motor vehicles. Each calibration device has at least one measuring plate with at least one pre-defined optical pattern, which is detected by the sensor of the driver assistance system to be calibrated in order to calibrate the sensor.

[0003] In order to calibrate the sensor with the required accuracy, the position and orientation of the measuring plate relative to the vehicle must be known with high precision. Therefore, the calibration device typically has an optical measurement system configured to optically detect the vehicle positioned in front of the calibration device in order to determine the position and orientation of the vehicle relative to the calibration device and thus also relative to the measuring plate placed at the calibration device.

[0004] Due to the required precision in this case, the optical measurement system set up to determine the position and / or orientation of the motor vehicle relative to the calibration device is costly and expensive.

[0005] Different calibration devices are often used for different sensors, such as those monitoring different areas of a motor vehicle's environment and / or based on different technologies. Summary of the Invention

[0006] Therefore, the objective of this invention is to reduce the cost of a calibration device configured for calibrating driver assistance systems for motor vehicles, particularly for calibrating sensors of driver assistance systems for motor vehicles, and equipped with an optical measurement system.

[0007] The solution to this task according to the invention includes an optical measurement system for calibrating a calibration device for calibrating a driver assistance system for motor vehicles, and in particular for calibrating sensors for driver assistance systems for motor vehicles, which can be combined with different calibration devices.

[0008] The optical measurement system according to the invention includes a mechanical connection device configured to mechanically connect the optical measurement system to a calibration device; and an identification interface that enables the optical measurement system to determine the type of calibration device on which it is installed, wherein the optical measurement system can be combined with different calibration devices, and in particular, the optical measurement system can be installed at different types of calibration devices for driver assistance systems of motor vehicles.

[0009] The invention also includes a calibration apparatus for calibrating a driver assistance system for motor vehicles, particularly for calibrating sensors of such systems. The calibration apparatus has a mechanical connection configured to mechanically connect the calibration apparatus to an optical measurement system constructed according to the invention. The calibration apparatus further includes an identification interface configured to interact with an identification interface of the optical measurement system constructed according to the invention, which is mechanically connected to the calibration apparatus, so that the optical measurement system can determine the type of the calibration apparatus.

[0010] The invention also includes a system for calibrating driver assistance systems for motor vehicles, particularly for calibrating sensors of such systems, wherein the system comprises at least two different calibration devices constructed according to the invention and at least one optical measurement system constructed according to the invention. Identification interfaces for the at least two calibration devices are configured such that the at least one optical measurement system can distinguish the at least two different calibration devices from each other.

[0011] The present invention further includes a method for calibrating a driver assistance system for a motor vehicle, particularly for calibrating sensors for such a system, using a calibration device according to the invention and an optical measurement system according to the invention. The method includes: mechanically connecting the optical measurement system to the calibration device via a mechanical connection means; identifying the calibration device to which the optical measurement system is connected via an identification interface of the optical measurement system and an identification interface of the calibration device; and determining the position of a motor vehicle positioned in front of the calibration device using the optical measurement system.

[0012] This invention enables an optical measurement system configured for installation at a calibration device used to calibrate driver assistance systems in motor vehicles to be independently and definitively determined at which type of calibration device the optical measurement system is installed.

[0013] When evaluating images of a motor vehicle recorded by an optical measurement system, this information can be taken into account so that the position and orientation of the calibration device relative to the motor vehicle can be determined with high accuracy using the recorded images.

[0014] Therefore, the optical measurement system constructed according to the present invention can be flexibly combined with different types of calibration devices.

[0015] Therefore, the system for calibrating a driver assistance system for a motor vehicle according to the present invention can operate using a single optical measurement system or a pair of optical measurement systems, which can be alternately placed at different calibration devices. The system includes multiple calibration devices that enable the calibration of different sensors or sensor types of the driver assistance system for a motor vehicle.

[0016] Therefore, compared with conventional systems, the cost and expense of providing a system for calibrating driver assistance systems for motor vehicles with different sensors can be significantly reduced in this way, in the case of conventional systems where each calibration device is equipped with its own optical measurement system, which is fixedly mounted at the respective calibration device.

[0017] In one embodiment, the identification interface includes an electrical interface that enables the optical measurement system to electrically determine the type of calibration device on which the optical measurement system is installed.

[0018] In one embodiment, the identification interface of the calibration device according to the invention is an electrical interface configured to interact with a corresponding electrical identification interface configured at an optical measurement system mechanically connected to the calibration device.

[0019] The identification and labeling interfaces, which are constructed as electrical interfaces, enable the implementation of a reliable combination of identification interfaces and corresponding labeling interfaces at low cost.

[0020] In one embodiment, the electrical interface includes a plurality of electrical contacts, and the optical measurement system is configured to identify the type of calibration device to which the optical measurement system is mounted based on an electrical connection established between the electrical contacts by the identification interface of the calibration device. The electrical interface with multiple electrical contacts enables a reliable combination of identification and recognition interfaces to be implemented at low cost.

[0021] In one embodiment, the identification interface has at least one electrical connector configured to electrically connect at least two electrical contacts of the identification interface to each other. By selectively connecting the electrical contacts of the identification interface, different types of calibration devices can be encoded in the identification interface in a simple manner.

[0022] In one embodiment, the optical measurement system includes at least one sensor configured to detect a voltage applied at at least one of the electrical contacts or a current flowing through at least two of the electrical contacts, in order to electrically determine the type of calibration device on which the optical measurement system is mounted.

[0023] In one embodiment, the electrical contacts are arranged in a matrix or along a polygon.

[0024] Embodiments of the present invention are described below with reference to the accompanying drawings. Attached Figure Description

[0025] Figure 1 A top view of a measuring station having a motor vehicle and a calibration device according to the invention is shown in the schematic diagram.

[0026] Figure 2 A perspective front view of a calibration device constructed according to an embodiment of the present invention is shown.

[0027] Figure 3A A fastening device according to the invention is shown, the fastening device having a mechanical connection device and an identification interface.

[0028] Figure 3B A schematic diagram showing an embodiment of an optical measurement system.

[0029] Figure 4A A first embodiment of the identification interface according to the present invention is illustrated in schematic diagram.

[0030] Figure 4B A second embodiment of the identification interface according to the present invention is illustrated in schematic diagram.

[0031] Figure 4C A third embodiment of the identification interface according to the present invention is illustrated in schematic diagram. Detailed Implementation

[0032] Figure 1 A schematic top view shows a measuring station 1, which has a motor vehicle 18 equipped with a motor vehicle driver assistance system 20. The motor vehicle driver assistance system 20 is equipped with a first forward-looking sensor 22a and a second rearward-looking sensor 22b.

[0033] The two sensors 22a and 22b can be, for example, optical sensors (“image recording device” or camera), radar sensors, or laser sensors (“LiDAR sensor”). The two sensors 22a and 22b can be sensors of the same type, such as both being optical sensors or radar sensors, or they can be sensors of different types, such as one optical sensor and one radar sensor.

[0034] The driver assistance system 20 for motor vehicles may also be equipped with more than two sensors 22a and 22b.

[0035] The first calibration device 2a is positioned in front of the motor vehicle 18, and the first calibration device is configured to calibrate the first sensor 22a for forward orientation.

[0036] The first calibration device 2a includes an optical pattern (see...) Figure 2 The calibration plate 8a, the optical pattern of which can be optically detected by the first sensor 22a, is used to calibrate the driver assistance system 20 of the motor vehicle and, in particular, to calibrate the first sensor 22a.

[0037] The second calibration device 2b is positioned diagonally behind the motor vehicle 18, and is configured to calibrate the rearward-oriented second sensor 22b.

[0038] exist Figure 1 In the illustrated embodiment, the second calibration device 2b also includes a calibration plate 8b. The calibration plate 8b of the second calibration device 2b may be different from the calibration plate 8a of the first calibration device 2a. For example, an optical pattern different from that on the calibration plate 8b of the second calibration device 2b may be constructed on the calibration plate 8b of the second calibration device 2b.

[0039] The second calibration device 2b can also be constructed differently from the first calibration device 2b. For example, the first calibration device 2a can be constructed to calibrate the optical sensor 22a, while the second calibration device 2b can be constructed to calibrate the radar sensor 22b or the lidar sensor 22b, or vice versa.

[0040] The first calibration device 2a and the second calibration device 2b are respectively equipped with two optical measurement systems (OMS) 12a and 12b, which are configured to optically detect the motor vehicle 18 arranged in front of the respective calibration devices 2a and 2b, so as to determine the position of the respective calibration devices 2a and 2b relative to the motor vehicle 18.

[0041] Figure 2 A perspective front view of a calibration device 2a constructed according to an embodiment of the present invention is shown.

[0042] The calibration device 2a includes a bracket 6 supported on a plurality of rollers 4, and a calibration plate 8a is mounted on the bracket 6. The rollers 4 can be positioned... Figure 2 A brake, not shown. The brake can be activated to prevent the calibration device 2a from unintentionally slipping away after it has been positioned in front of the motor vehicle 18.

[0043] An optical pattern is constructed on the calibration plate 8a, the optical pattern being configured to be detected optically by the optical sensor 22a of the motor vehicle driver assistance system 20, so as to enable the calibration of the optical sensor 22a of the motor vehicle driver assistance system 20.

[0044] Calibration board 8a in Figure 2 The specific design shown, and especially the optical pattern constructed on the calibration plate 8a, are merely exemplary. Other patterns may be constructed on the calibration plate 8a depending on the requirements of the driver assistance system 20 of the motor vehicle to be calibrated, and / or the calibration plate 8a may be constructed to reflect the radar radiation of the radar sensor 22a or the laser radiation of the lidar sensor 22a.

[0045] Depending on the position and operation of the sensor 22a to be calibrated, the calibration plate 8a can also be installed in other positions on the bracket 6 of the calibration device 2a, especially in a lower position.

[0046] The fixing device 10 is positioned below the calibration plate 8a at the bracket 6. In other embodiments not explicitly shown in the figures, the fixing device 10 may also be positioned above or behind the calibration plate 8a.

[0047] The fastening device 10 may be constructed of metal or plastic. In particular, the fastening device 10 may include a profile constructed of metal or plastic.

[0048] The fixing device 10 extends in a beam-like manner along axis A in a horizontal direction parallel to the plane of calibration plate 8a from left to right. (As shown in...) Figure 1 and 2 As shown, the fixing device 10 extends, in particular, beyond the side edge of the calibration plate 8.

[0049] Optical measurement systems 12a and 12b are respectively provided in the two outer end regions 10a and 10b of the fixing device 10 or at the two outer end regions 10a and 10b of the fixing device 10.

[0050] Optical measurement systems 12a and 12b are configured to record images of a motor vehicle 18 located in front of the calibration device 2. Optical measurement systems 12a and 12b may, for example, include monochrome or stereo cameras. The cameras may be configured as black-and-white or color cameras.

[0051] The optical measurement system 12a, 12b or the camera can be configured to record light in the visible range and / or to record light in the infrared range.

[0052] In the horizontal direction, the distance L between the two optical measurement systems 12a and 12b is preferably greater than the maximum width B of the motor vehicle 18, and the motor vehicle driver assistance system 20 of the motor vehicle 18 can be calibrated by means of the calibration device 2.

[0053] The distance L between the two optical measurement systems 12a and 12b can, for example, be in the range of 180 cm and 300 cm.

[0054] Images recorded by optical measurement systems 12a and 12b are wirelessly or wired to evaluation device 14, which is configured to evaluate the images transmitted by optical measurement systems 12a and 12b in order to determine the position and / or orientation of calibration device 2a relative to motor vehicle 18.

[0055] The evaluation device 14 can be constructed separately from the optical measurement systems 12a and 12b, as in Figure 2 As shown in the figure. The evaluation device 14 can also be integrated into at least one of the two optical measurement systems 12a, 12b.

[0056] In order to selectively place and operate the optical measurement systems 12a and 12b at different calibration devices 2a and 2b, the optical measurement systems 12a and 12b are placed at the corresponding calibration devices 2a and 2b by means of detachable fastening devices 16a and 16b.

[0057] The fastening devices 16a and 16b respectively include easily detachable mechanical connection devices 26a and 26b, which enable the respective optical measurement systems 12a and 12b to be securely, but easily detachably, placed and fastened to the respective calibration devices 2a and 2b, and in particular to the fixing devices 10 of the respective calibration devices 2a and 2b.

[0058] Mechanical connection devices 26a, 26b can, for example, be configured to form a form-fit connection between the respective optical measurement systems 12a, 12b and the fixing devices 10 of the respective calibration devices 2a, 2b.

[0059] The mechanical connection devices 26a and 26b may also include a stop mechanism, such as a stop lug, which enables the optical measurement systems 12a and 12b to be securely locked at the fixing device 10.

[0060] Figure 3A An embodiment of the fastening device 16 according to the present invention is shown, the fastening device having a mechanical connection device 26 and an identification interface 28 having two electrical contacts 30, 32.

[0061] exist Figure 3AIn the embodiment shown, the mechanical connection device 26 is configured as a bayonet. (In...) Figure 3A The optical measurement system 12 (not shown) can be fixed to a corresponding mechanical connection device in a rotational manner, the corresponding mechanical connection device being constructed at the fixing device 10 of the calibration device 2a.

[0062] Fastening device 16 in Figure 3A The embodiments shown are merely exemplary. The fastening device 16 can also be constructed in different ways. In particular, the mechanical connection device 26 of the fastening device 16 can be constructed such that the optical measurement system 12 can be fastened to the fixing device 10 in a linear motion.

[0063] The mechanical connection device 26 may also be configured with at least one electromagnet and / or at least one permanent magnet so that the optical measurement system 12 can be fastened to the fixing device 10 by means of magnetic force.

[0064] When the optical measurement system 12 is fastened to the fixing device 10 as specified by means of the fastening device 16, the electrical contacts 30, 32 of the identification interface 28 are connected to the contacts constructed on the fixing device 10 (in... Figure 3A (Not shown in the diagram) The corresponding electrical contacts 34a-34c and 36a-36c of the interfaces 29a-29c are identified. Figures 4A-4C Different examples of identification interfaces 29a-29c are shown.

[0065] The configuration of the identification interfaces 29a-29c characterizes the corresponding calibration devices 2a and 2b. Therefore, the interaction between the identification interface 28 of the optical measurement system 12 and the identification interfaces 29a-29c constructed at the fixing device 10 of the calibration devices 2a and 2b enables the optical measurement system 12 to clearly identify the calibration devices 2a and 2b in which the optical measurement system 12 is located.

[0066] Figure 3B An embodiment of an optical measurement system 12 is illustrated in a simplified schematic diagram. The optical measurement system has two mechanical connection devices 26a and 26b, which are configured to mechanically connect the optical measurement system 12 to the fixing device 10 of the calibration devices 2a and 2b, and to stably fix it at the fixing device 10.

[0067] The optical measurement system 12 also includes an image recording device or camera 15 and an evaluation device 14 for evaluating the images recorded by the image recording device or camera 15.

[0068] An identification interface 28 is also constructed at the optical measurement system 12. This identification interface 28 corresponds to the identification interfaces 29a-29c constructed at the fixing device 10 (see...). Figures 4A-4C The two devices interact so that the measurement system 12 can clearly identify the type of calibration device 2a, 2b on which the optical measurement system 12 is located.

[0069] The interaction between the identification interface 28 and the identification interfaces 29a-29c enables the measurement system 12 to determine, for example, whether the measurement system is located at a (first) calibration device 2a configured to calibrate a forward-oriented sensor 22a, or at a (second) calibration device 2b configured to calibrate a backward-looking sensor 22b.

[0070] The interaction between the identification interface 28 and the identification interfaces 29a-29c also enables the measurement system 12 to distinguish between calibration devices 2a and 2b, which are configured to calibrate optical sensors 22a and 22b, radar sensors 22a and 22b, or lidar sensors 22a and 22b.

[0071] exist Figure 3B In the embodiment shown, the identification interface 28 is equipped with six electrical contacts 30a-30c, 32a-32c, and in particular with three electrical output contacts 30a-30c and three electrical input contacts 32a-32c.

[0072] Electrical contacts 30a-30c and 32a-32c are connected to the evaluation device 14 via electrical lines 25. Electrical contacts 30a-30c and 32a-32c may be configured, for example, as contact pins, contact sockets, or contact surfaces.

[0073] Electrical output contacts 30a-30c are connected to a voltage source 33, which applies voltage to the output contacts 30a-30c. The voltage applied to the output contacts 30a-30c can be a DC voltage or an AC voltage. The voltage can be in the range of 5 V to 24 V, and more particularly in the range of 10 V to 12 V.

[0074] Input contacts 32a-32c are respectively connected to electrical sensors 35a-35c, which are configured to detect the voltage applied to the input contacts 32a-32c and / or the current flowing through the input contacts 32a-32c, in order to identify the calibration devices 2a and 2b connected to the optical measurement system 12.

[0075] Figures 4A to 4C Three different examples of identification interfaces 29a-29c are shown, each configured to interact with, as in... Figure 3B The identification interface 28 shown interacts.

[0076] Each of the identification interfaces 29a-29c also has six electrical contacts 34a-34c, 36a-36c, which are configured to contact the electrical contacts 30a-30c, 32a-32c of the identification interface 28 when the optical measurement systems 12, 12a, 12b are placed at the calibration devices 2a, 2b.

[0077] exist Figure 4A In the first embodiment shown, the two contacts 34a and 36a of the first contact pair of the identification interface 29a are electrically connected to each other via an electrical connection 38a. This results in, when in Figure 4A When the identification interface 29a shown is connected to the recognition interface 28, the voltage of the voltage source 33 is detected at the first input contact 32b of the recognition interface 28, or the current flowing through the first input contact 32b of the recognition interface 28 is measured.

[0078] The contacts 34a, 34c, 36b, and 36c of the second and third contact pairs of the identification interface 29a are not electrically connected to each other. This results in... Figure 4A When the identification interface 29a shown is connected to the identification interface 28, no voltage is detected at the second input contact 32b and the third input contact 32c of the identification interface 28, and no current flows through the second input contact 32b and the third input contact 32c of the identification interface 28.

[0079] exist Figure 4B In the second embodiment of the identification interface 29a shown, the two contacts 34b, 36b of the second contact pair of the identification interface 29 are electrically connected to each other via an electrical connection 38b. This results in, when in Figure 4B When the identification interface 29b shown is connected to the identification interface 28, the voltage of the voltage source 33 is detected at the second input contact 32b of the identification interface 28, or the current flowing through the first input contact 32b of the identification interface 28 is measured.

[0080] In the identification interface 29b Figure 4B In the second embodiment shown, contacts 34a, 34c, 36a, and 36c of the first and third contact pairs of the identification interface 29b are not electrically connected to each other. This results in... Figure 4B When the identification interface 29b shown is connected to the identification interface 28, no voltage is detected at the first input contact 32a and the third input contact 32c of the identification interface 28, and no current flows through the first input contact 32b and the third input contact 32c of the identification interface 28.

[0081] In the identification interface 29c Figure 4CIn the third embodiment shown, not only are the two contacts 34a and 34b of the first contact pair of the identification interface 29c electrically connected to each other via electrical connections 38a and 38b. The two contacts 36a and 36b of the third contact pair of the identification interface 29c are not connected to each other.

[0082] This leads to, when Figure 4C When the identification interface 29c shown is electrically connected to the identification interface 28, the voltage of the voltage source 33 is detected not only at the first input contact 32a of the identification interface 28 but also at the second input contact 32b, or the current flows not only through the first input contact 32a but also through the second input contact 32b.

[0083] Therefore, in Figures 4A to 4C The three differently constructed identification interfaces 29a-29c shown can be distinguished from each other and clearly identified individually by measuring the voltage at the input contacts 32a-32c of the identification interface 28 and / or by measuring the current flowing through the input contacts 32a-32c of the identification interface 28.

[0084] If each of the three identification interfaces 29a-29c is assigned to a type of calibration device 2a, 2b, then the three different types of calibration devices 2a, 2b can be distinguished from each other and clearly identified respectively.

[0085] By selectively connecting contacts 34c and 36c of the third contact pair, other identification interfaces 29a-29c and calibration devices 2a and 2b connected to these identification interfaces 29a-29c can be identified and distinguished from each other.

[0086] In other embodiments not explicitly shown in the figures, additional contact pairs may be constructed at identification interface 28 and at identification interfaces 29a-29c, which enable a greater number of different identification interfaces 29a-29c to be distinguished from each other.

[0087] Contact elements 30a-30c, 32a-32c, 34a-34c, and 36a-36c can be arranged in a rectangular matrix, as shown in... Figure 3B and 4A As shown in 4C.

[0088] However, in Figure 3B and 4AThe rectangular matrix arrangement of contacts 30a-30c, 32a-32c, 34a-34c, and 36a-36c shown in figures 4C is merely exemplary. In other embodiments not explicitly shown in the figures, contacts 30a-30c, 32a-32c, 34a-34c, and 36a-36c may also be arranged in other arrangements or patterns.

[0089] The optical measurement systems 12, 12a, 12b equipped with the identification interface 28 according to the present invention can clearly identify the corresponding identification interfaces 29a-29c connected to the identification interface 28 by detecting and evaluating the voltage applied to the input contacts 32a-32c of the identification interface 28 or the current flowing through the electrical contacts 30a-30c, 32a-32c of the identification interface 28.

[0090] The optical measurement systems 12, 12a, and 12b can be explicitly determined in such a way that they are installed at the type of calibration devices 2a and 2b. This information can be taken into account when evaluating images of the motor vehicle 18 recorded by the optical measurement systems 12, 12a, and 12b, so that the position and orientation of the calibration devices 2a and 2b relative to the motor vehicle 18 can be determined with high accuracy.

[0091] Therefore, the optical measurement systems 12, 12a, 12b equipped with the identification interface 28 according to the present invention can be flexibly used in combination with different types of calibration devices 2a, 2b.

[0092] The system for calibrating a motor vehicle driver assistance system 20 with different sensors 22a, 22b can therefore operate using a single optical measurement system 12 or a pair of optical measurement systems 12a, 12b. The system includes multiple calibration devices 2a, 2b, which are differently constructed and configured to calibrate different sensors 22a, 22b or sensor types of the motor vehicle driver assistance system 20. The optical measurement systems 12, 12a, 12b or the pair of optical measurement systems 12a, 12b can be alternately placed at different calibration devices 2a, 2b.

[0093] Compared to conventional systems, the cost and expense of providing a system for calibrating a motor vehicle driver assistance system 20 with multiple calibration devices 2a, 2b can be significantly reduced in this way. The motor vehicle driver assistance system includes multiple sensors 22a, 22b, in the case of conventional systems, each of the calibration devices 2a, 2b is equipped with its own optical measurement system 12, 12a, 12b fixedly mounted at the corresponding calibration device 2a, 2b.

Claims

1. An optical measurement system (12, 12a, 12b) capable of being mounted at different types of calibration devices (2, 2a, 2b) for a driver assistance system (20) of a motor vehicle, wherein the optical measurement system (12, 12a, 12b) has: Mechanical connection devices (16, 16a, 16b), configured to mechanically connect the optical measurement system (12, 12a, 12b) to the calibration devices (2, 2a, 2b); and Identification interfaces (28, 28a, 28b) enable the optical measurement systems (12, 12a, 12b) to determine the type of calibration device (2, 2a, 2b) on which the optical measurement systems (12, 12a, 12b) are installed.

2. The optical measurement system (12, 12a, 12b) according to claim 1, wherein the identification interface (28, 28a, 28b) includes an electrical interface that enables the optical measurement system (12, 12a, 12b) to electrically determine the type of calibration device (2, 2a, 2b) on which the optical measurement system (12, 12a, 12b) is installed.

3. The optical measurement system (12, 12a, 12b) according to claim 2, wherein the electrical interface comprises a plurality of electrical contacts (30, 30a-30c, 32, 32a-32c), and wherein the optical measurement system (12, 12a, 12b) is configured to identify the type of calibration device (2, 2a, 2b) to which the optical measurement system (12, 12a, 12b) is mounted based on the electrical connection (38a-38c) established by the calibration device (2, 2a, 2b) between the electrical contacts (30, 30a-30c, 32, 32a-32c).

4. The optical measurement system (12, 12a, 12b) according to claim 3, having at least one sensor (35a-35c) configured to detect a voltage applied at at least one of the electrical contacts (30, 30a-30c, 32, 32a-32c) or a current flowing through at least two of the electrical contacts (30, 30a-30c, 32, 32a-32c).

5. The optical measurement system (12, 12a, 12b) according to claim 3 or 4, wherein the electrical contacts (30, 30a-30c, 32, 32a-32c) are arranged in a matrix, in particular in a rectangular matrix.

6. A calibration device (2, 2a, 2b) for calibrating a driver assistance system (20) of a motor vehicle, comprising: Mechanical connection devices (16, 16a, 16b) configured to mechanically connect the calibration device (2, 2a, 2b) to the optical measurement system (12, 12a, 12b) according to any one of claims 1 to 5; and Identification interfaces (29a-29c) are configured to interact with identification interfaces (28, 28a, 28b) of optical measurement systems (12, 12a, 12b) that are mechanically connected to the calibration devices (2, 2a, 2b) so that the optical measurement systems (12, 12a, 12b) can determine the type of the calibration devices (2, 2a, 2b).

7. The calibration apparatus (2, 2a, 2b) according to claim 6, wherein the identification interface (29a-29c) is an electrical interface configured to interact with a corresponding electrical identification interface (28, 28a, 28b).

8. The calibration apparatus (2, 2a, 2b) according to claim 7, wherein the identification interface (29a-29c) has at least one electrical connection (38a-38c) that interconnects at least two electrical contacts (30a-30c, 32a-32c) of the identification interface (28, 28a, 28b).

9. A system for calibrating a driver assistance system (20) of a motor vehicle, the system comprising: At least two different calibration devices (2, 2a, 2b) according to any one of claims 6 to 8, and At least one optical measurement system (12, 12a, 12b) according to any one of claims 1 to 5. The identification interfaces (29a-29c) of the at least two different calibration devices (2, 2a, 2b) are configured such that the identification interfaces enable the at least one optical measurement system (12, 12a, 12b) to distinguish the at least two different calibration devices (2, 2a, 2b) from each other.

10. A method for calibrating a driver assistance system (20) of a motor vehicle using the calibration apparatus (2, 2a, 2b) according to any one of claims 6 to 8 and the optical measurement system (12, 12a, 12b) according to any one of claims 1 to 5, wherein the method comprises: The optical measurement system (12, 12a, 12b) is mechanically connected to the calibration device (2, 2a, 2b) by means of mechanical connection devices (16, 16a, 16b); The calibration devices (2, 2a, 2b) connected to the optical measurement system (12, 12a, 12b) are identified by means of the identification interfaces (28, 28a, 28b) of the optical measurement system (12, 12a, 12b) and the identification interfaces (29a, 29c) of the calibration devices (2, 2a, 2b); and The position of the motor vehicle (18) positioned in front of the calibration device (2, 2a, 2b) is determined by means of the optical measurement system (12, 12a, 12b).

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