A system for calibrating an automobile driver assistance system equipped with an optical device and a calibration device.

Abstract

An optical measuring system (12, 12a, 12b) that can be assembled to various types of calibration devices (2, 2a, 2b) for an automobile driver assistance system (20) includes a mechanical connector (16, 16a, 16b) configured to mechanically connect the optical measuring system (12, 12a, 12b) to the calibration device (2, 2a, 2b), and an identification interface (28, 28a, 28b) that enables the optical measuring system (12, 12a, 12b) to identify the type of calibration device (2, 2a, 2b) to which it is assembled.

Description

Technical Field

[0001] The present invention relates to an optical measurement system and a calibration device for calibrating a driver assistance system in a motor vehicle, which is hereinafter referred to as an automotive driver assistance system.

Background Art

[0002] Prior Art In order to calibrate sensors of a driver assistance system incorporated in a motor vehicle, calibration devices are used, particularly in the factory field. To calibrate the sensors, the calibration device has at least one measurement board each having at least one predetermined optical pattern, and this predetermined optical pattern is detected by the sensors of the automotive driver assistance system to be calibrated.

[0003] In order to be able to calibrate the sensors with the required accuracy, the position and orientation of the measurement board with respect to the motor vehicle must be accurately determined. Therefore, the calibration device is often configured with an optical measurement system that optically detects the motor vehicle disposed in front of the calibration device in order to be able to specify the position and orientation of the motor vehicle with respect to the calibration device and, ultimately, with respect to the measurement board attached to the calibration device.

[0004] The optical measurement system provided for specifying the position and / or orientation of the motor vehicle with respect to the calibration device is laborious and expensive due to the accuracy required in this case.

[0005] For example, different calibration devices are often used for respectively different regions around the motor vehicle and / or for a plurality of different sensors based on respectively different technologies.

Summary of the Invention

Problems to be Solved by the Invention

[0006] Disclosure of the Invention Therefore, an object of the present invention is to reduce the cost of a calibration device that is provided for calibrating an automobile driver assistance system, particularly for calibrating the sensors of an automobile driver assistance system, and that is equipped with an optical measurement system. [Means for solving the problem]

[0007] A solution to the problems of the present invention includes providing an optical measurement system that can be combined with various types of calibration devices for calibration devices for calibrating automotive driver assistance systems, and in particular for calibration devices for calibrating sensors of automotive driver assistance systems.

[0008] The optical measurement system according to the present invention, which can be combined with various types of calibration devices and, in particular, can be incorporated into various types of calibration devices for automotive driver assistance systems, includes a mechanical connector configured to mechanically connect the optical measurement system to a calibration device, and an identification interface (Identifikationsschnittstelle) that enables the optical measurement system to identify the type of calibration device into which the optical measurement system is incorporated.

[0009] The present invention also includes a calibration device for calibrating an automobile driver assistance system, particularly for calibrating sensors of an automobile driver assistance system, the calibration device comprising a mechanical connector configured to mechanically connect the calibration device to an optical measuring system configured according to the present invention. The calibration device further includes an identification interface configured to cooperate with an identification interface of the optical measuring system configured according to the present invention, which is mechanically connected to the calibration device, in order to enable the optical measuring system to identify the type of the calibration device.

[0010] The present invention also includes a system for calibrating an automobile driver assistance system, and more particularly for calibrating sensors of an automobile driver assistance system, comprising at least two different calibration devices configured according to the present invention, and at least one optical measurement system configured according to the present invention. The identification interface of the at least two calibration devices is configured to allow the at least one optical measurement system to distinguish each of the at least two different calibration devices.

[0011] The present invention further includes a method for calibrating an automobile driver assistance system, particularly for calibrating sensors of an automobile driver assistance system, comprising a calibration device according to the present invention and an optical measurement system according to the present invention. The method includes mechanically connecting the optical measurement system to the calibration device using a mechanical connector; identifying the calibration device to which the optical measurement system is connected using an identifiable interface (Identifikationsschnittstelle) of the optical measurement system and an identifiable interface (Identifizierungsschnittstelle) of the calibration device; and determining the position of an automobile positioned in front of the calibration device using the optical measurement system.

[0012] The present invention enables an optical measurement system configured for integration into a calibration device for calibrating an automobile driver assistance system to independently and uniquely determine what type of calibration device it is integrated into.

[0013] By considering this information when evaluating images of a vehicle captured by an optical measurement system, the position and orientation of the calibration device relative to the vehicle can be determined with high accuracy using the captured images.

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

[0015] This allows the system according to the present invention for calibrating an automobile driver assistance system, which includes multiple calibration devices that enable the calibration of various sensors or types of sensors in the automobile driver assistance system, to be operated using a single optical measurement system that can be alternately attached to various calibration devices, or using a single pair of optical measurement systems.

[0016] In this way, the effort and cost required to provide a system for calibrating automotive driver assistance systems equipped with various sensors can be significantly reduced compared to conventional systems where each calibration device is equipped with its own dedicated optical measurement system that is securely installed in that device.

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

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

[0019] By configuring identification interfaces and identifiable expression interfaces as electrical interfaces, it becomes possible to implement highly reliable combinations consisting of an identification interface and a corresponding identifiable expression interface 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 assembled based on an electrical connection formed between the electrical contacts by an identification type interface of the calibration device. With one electrical interface having a plurality of electrical contacts, it is possible to implement a highly reliable combination of an identification type interface and an identification type interface at a low cost.

[0021] In one embodiment, the identification type interface has at least one electrical connection configured to electrically interconnect at least two electrical contacts of the identification type interface. By selectively connecting the electrical contacts of the identification type interface, a plurality of different types of calibration devices can be easily encoded in the identification type interface.

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

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

[0024] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

Brief Description of the Drawings

[0025] [Figure 1] It is a schematic diagram showing a plan view of a measurement location equipped with an automobile and a calibration device according to the present invention. [Figure 2] It is a perspective front view showing a calibration device configured according to an embodiment of the present invention. [Figure 3A] It is a figure showing a fixing device according to the present invention provided with a mechanical connection device and an identification type interface. [Figure 3B] It is a schematic diagram showing an embodiment of an optical measurement system. [Figure 4A] It is a schematic diagram showing a first embodiment of an identification type interface according to the present invention. [Figure 4B] It is a schematic diagram showing a second embodiment of an identification type interface according to the present invention. [Figure 4C] It is a schematic diagram showing a third embodiment of an identification type interface according to the present invention.

Mode for Carrying Out the Invention

[0026] Explanation of Drawings FIG. 1 shows a measurement location 1 including a vehicle 18 equipped with an automotive driver assistance system 20 in a schematic plan view. The automotive driver assistance system 20 is equipped with a first sensor 22a that observes forward and a second sensor 22b that observes rearward.

[0027] The two sensors 22a, 22b may be, for example, optical sensors (“imaging devices” or cameras), radar sensors, or laser sensors (“LIDAR sensors”). The two sensors 22a, 22b may each be of the same type of sensor, for example, both may be optical sensors, or both may be radar sensors, or they may be of different types of sensors, for example, one may be an optical sensor and one may be a radar sensor.

[0028] The automotive driver assistance system 20 may be equipped with three or more sensors 22a, 22b.

[0029] In front of the vehicle 18, a first calibration device 2a provided for calibrating the first sensor 22a directed forward is positioned.

[0030] The first calibration device 2a includes a calibration board 8a equipped with an optical pattern (see Figure 2) that can be optically detected by the first sensor 22a, in order to calibrate the automobile driver assistance system 20 and, in particular, the first sensor 22a.

[0031] A second calibration device 2b is positioned diagonally behind the vehicle 18, which is provided for calibrating a second sensor 22b that is oriented towards the rear.

[0032] In the embodiment shown in Figure 1, the second calibration device 2b also includes a calibration board 8b. The calibration board 8b of the second calibration device 2b may be different from the calibration board 8a of the first calibration device 2a. For example, the calibration board 8b of the second calibration device 2b may have a different optical pattern than the calibration board 8a of the first calibration device 2a.

[0033] The second calibration device 2b may be configured differently from the first calibration device 2b. For example, the first calibration device 2a may be configured to calibrate the optical sensor 22a, and the second calibration device 2b may be configured to calibrate the radar sensor 22b or the LIDAR sensor 22b, or vice versa.

[0034] The first calibration device 2a and the second calibration device 2b are each equipped with two optical measuring systems (OMS) 12a and 12b, which are configured to optically detect the automobile 18 positioned in front of each calibration device 2a and 2b in order to determine the position of each calibration device 2a and 2b relative to the automobile 18.

[0035] Figure 2 shows a perspective front view of a calibration device 2a configured according to one embodiment of the present invention.

[0036] The calibration device 2a includes a frame 6 supported on a plurality of casters 4, to which a calibration board 8a is mounted. The casters 4 may be equipped with brakes, which are not shown in Figure 2. After the calibration device 2a is positioned in front of the vehicle 18, the brakes can be activated to prevent the calibration device 2a from moving unintentionally.

[0037] To enable calibration of the optical sensor 22a of the vehicle driver assistance system 20, the calibration board 8a has an optical pattern formed on it that is optically detectable by the optical sensor 22a of the vehicle driver assistance system 20.

[0038] The specific structure of the calibration board 8a shown in Figure 2, particularly the optical pattern formed on the calibration board 8a, is merely illustrative. Depending on the requirements of the automotive driver assistance system 20 to be calibrated, other different patterns may be formed on the calibration board 8a, and / or the calibration board 8a may be configured to reflect radar radiation from the radar sensor 22a or laser radiation from the LIDAR sensor 22a.

[0039] Depending on the position and function of the sensor 22a to be calibrated, the calibration board 8a can also be mounted on the frame 6 of the calibration device 2a at other different positions, particularly at lower positions.

[0040] Below the calibration board 8a, the retaining device 10 is attached to the frame 6. In other different embodiments not explicitly shown in the drawings, the retaining device 10 may also be positioned above or behind the calibration board 8a.

[0041] The retaining device 10 may be made of metal or plastic. In particular, the retaining device 10 may include a shaped cross-section made of metal or plastic.

[0042] The holding device 10 extends in a beam shape from left to right along a horizontal axis A parallel to the plane of the calibration board 8a. In particular, as shown in Figures 1 and 2, the holding device 10 extends beyond the lateral edges of the calibration board 8.

[0043] One optical measuring system 12a, 12b is provided within or in contact with both outer end regions 10a, 10b of the holding device 10.

[0044] The optical measurement systems 12a and 12b are configured to capture images of the automobile 18 located in front of the calibration device 2. The optical measurement systems 12a and 12b may include, for example, a mono camera or a stereo camera, respectively. The cameras may be configured as monochrome or color cameras.

[0045] The optical measurement systems 12a, 12b or the camera may be configured to capture light in the visible region and / or light in the infrared region.

[0046] The distance L between the two optical measuring systems 12a and 12b in the horizontal direction is preferably greater than the maximum width B of the automobile 18 having an automobile driver assistance system 20 that can be calibrated using a calibration device 2.

[0047] The distance L between the two optical measurement systems 12a and 12b may be, for example, within the range of 180 cm to 300 cm.

[0048] Images captured by the optical measurement systems 12a and 12b are transmitted wirelessly or via wire to the evaluation device 14, which is configured to evaluate the images transmitted from the optical measurement systems 12a and 12b in order to determine the position and / or orientation of the calibration device 2a relative to the automobile 18.

[0049] The evaluation device 14 may be configured separately from the optical measurement systems 12a and 12b, as shown in Figure 2. The evaluation device 14 can also be incorporated into at least one of the two optical measurement systems 12a and 12b.

[0050] In order to enable the optical measurement systems 12a and 12b to be selectively attached to and operated on various different calibration devices 2a and 2b, the optical measurement systems 12a and 12b are attached to their respective calibration devices 2a and 2b using detachable fixing devices 16a and 16b.

[0051] Each fixing device 16a, 16b includes one easily detachable mechanical connecting device 26a, 26b, which enables the respective optical measuring systems 12a, 12b to be securely, but easily detachably, attached to and fixed to the respective calibration devices 2a, 2b, in particular to the holding device 10 of the respective calibration devices 2a, 2b.

[0052] The mechanical connecting devices 26a and 26b may be configured, for example, to form a shape-coupled connection between the respective optical measuring systems 12a and 12b and the holding devices 10 of the respective calibration devices 2a and 2b.

[0053] The mechanical connecting devices 26a, 26b may also include a locking mechanism, such as a locking projection, that enables the optical measuring systems 12a, 12b to be securely locked to the holding device 10.

[0054] Figure 3A shows an embodiment of the present invention of a stationary device 16 comprising a mechanical connection device 26 and an identification interface 28 having two electrical contacts 30, 32.

[0055] In the embodiment shown in Figure 3A, the mechanical connector 26 is formed in the bayonet type. An optical measuring system 12 (not shown in Figure 3A) equipped with such a mechanical connector 26 can be fixed in rotational motion to a corresponding mechanical connector formed on the holding device 10 of the calibration device 2a.

[0056] The embodiment of the fixing device 16 shown in Figure 3A is merely illustrative. The fixing device 16 can be configured in a different way. The mechanical connection device 26 of the fixing device 16 may be configured in particular to fix the optical measuring system 12 in the linear motion of the holding device 10.

[0057] To enable the optical measuring system 12 to be fixed to the holding device 10 by magnetic force, the mechanical connecting device 26 may also be formed to include at least one electromagnet and / or at least one permanent magnet.

[0058] When the optical measurement system 12 is fixed to the holding device 10 as specified using the fixing device 16, the electrical contacts 30 and 32 of the identification interface 28 are electrically in contact with the corresponding electrical contacts 34a to 34c and 36a to 36c of the identification interfaces 29a to 29c formed on the holding device 10 (not shown in Figure 3A). Several different examples of the identification interfaces 29a to 29c are shown in Figures 4A to 4C.

[0059] The configuration of the identification interfaces 29a to 29c is unique to each calibration device 2a and 2b. Therefore, through the cooperation of the identification interface 28 of the optical measurement system 12 and the identification interfaces 29a to 29c formed on the holding devices 10 of the calibration devices 2a and 2b, the optical measurement system 12 can uniquely identify the calibration devices 2a and 2b to which it is attached.

[0060] Figure 3B shows a simplified schematic diagram of one embodiment of an optical measurement system 12 equipped with two mechanical connecting devices 26a and 26b, which are configured to mechanically connect the optical measurement system 12 to the holding device 10 of the calibration devices 2a and 2b, and to securely mount it to the holding device 10.

[0061] The optical measurement system 12 also includes an image acquisition device or camera 15 and an evaluation device 14 for evaluating the images acquired by the image acquisition device or camera 15.

[0062] The optical measurement system 12 also has an identification interface 28. The identification interface 28 works in conjunction with the corresponding identification interfaces 29a to 29c (see Figures 4A to 4C) formed on the holding device 10 to enable the measurement system 12 to uniquely identify the type of calibration device 2a, 2b or the type of calibration device 2a, 2b.

[0063] Through the cooperation of the identification interfaces 29a to 29c and the identification interface 28, the measurement system 12 can, for example, determine whether it is attached to the (first) calibration device 2a, which is provided for calibrating the forward-oriented sensor 22a, or to the (second) calibration device 2b, which is provided for calibrating the rearward-facing sensor 22b.

[0064] Through the cooperation of the identification interface 28 and the identification interfaces 29a to 29c, the measurement system 12 can also distinguish between calibration devices 2a and 2b configured for the calibration of optical sensors 22a and 22b, radar sensors 22a and 22b, or LIDAR sensors 22a and 22b.

[0065] In the embodiment shown in Figure 3B, the identification interface 28 is equipped with six electrical contacts 30a-30c, 32a-32c, in particular three electrical output contacts 30a-30c and three electrical input contacts 32a-32c.

[0066] The electrical contacts 30a-30c and 32a-32c are connected to the evaluation device 14 by an electrical line 25. The electrical contacts 30a-30c and 32a-32c may be configured as, for example, contact pins, contact sockets, or contact pads.

[0067] The electrical output contacts 30a to 30c are connected to a voltage source 33 that applies voltage to the output contacts 30a to 30c. The voltage applied to the output contacts 30a to 30c may be a DC voltage or an AC voltage. The voltage may be within the range of 5V to 24V, and particularly within the range of 10V to 12V.

[0068] The input contacts 32a to 32c are each connected to electrical sensors 35a to 35c, which are configured to detect the voltage applied to the input contacts 32a to 32c and / or the current flowing through the input contacts 32a to 32c in order to identify the calibration devices 2a and 2b to which the optical measurement system 12 is connected.

[0069] Figures 4A to 4C show three different examples of identifiable interfaces 29a to 29c, each configured to work with the identifiable interface 28 as shown in Figure 3B.

[0070] Each of the identification interfaces 29a to 29c also has six electrical contacts 34a to 34c, 36a to 36c, which are configured to contact the electrical contacts 30a to 30c, 32a to 32c of the identification interface 28 when the optical measurement systems 12, 12a, and 12b are attached to the calibration devices 2a and 2b.

[0071] In the first embodiment shown in Figure 4A, the two contacts 34a and 36a of the first contact pair of the identification interface 29a are electrically interconnected by an electrical connection 38a. As a result, when the identification interface 29a shown in Figure 4A is connected to the identification interface 28, the voltage of the voltage source 33 is detected at the first input contact 32a of the identification interface 28, or the current flowing through the first input contact 32a of the identification interface 28 is measured.

[0072] The contacts 34b and 36b of the second contact pair of the identification interface 29a, and the contacts 34c and 36c of the third contact pair, are not electrically connected to each other. As a result, when the identification interface 29a shown in Figure 4A 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.

[0073] In the second embodiment of the identification interface 29b shown in Figure 4B, the two contacts 34b and 36b of the second contact pair of the identification interface 29b are electrically interconnected by an electrical connection 38b. As a result, when the identification interface 29b shown in Figure 4B 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 second input contact 32b of the identification interface 28 is measured.

[0074] The contacts 34a and 36a of the first contact pair of the identification interface 29b, and the contacts 34c and 36c of the third contact pair, are not electrically connected to each other. As a result, when the identification interface 29b shown in Figure 4B 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 32a and the third input contact 32c of the identification interface 28.

[0075] In the third embodiment of the identification interface 29c shown in Figure 4C, both the two contacts 34a and 36a of the first contact pair of the identification interface 29c and the two contacts 34b and 36b of the second contact pair are electrically interconnected by electrical connectors 38a and 38b. The two contacts 34c and 36c of the third contact pair of the identification interface 29c are not interconnected.

[0076] As a result, when the identification interface 29c shown in Figure 4C is electrically connected to the identification interface 28, the voltage of the voltage source 33 is detected at both the first input contact 32a and the second input contact 32b of the identification interface 28, or current flows through both the first input contact 32a and the second input contact 32b.

[0077] Therefore, the three distinctly configured identification interfaces 29a to 29c shown in Figures 4A to 4C can be distinguished and uniquely identified by measuring the voltage at the input contacts 32a to 32c of the identification interface 28 and / or by measuring the current flowing through the input contacts 32a to 32c of the identification interface 28.

[0078] If each of the three identification interfaces 29a to 29c is associated with one type of calibration device 2a, 2b, then the three different types of calibration devices 2a, 2b can be distinguished and uniquely identified in this way.

[0079] By further selectively connecting contacts 34c and 36c of the third contact pair, it is possible to identify and distinguish between additional identification interfaces 29a to 29c and the calibration devices 2a and 2b connected to these identification interfaces 29a to 29c.

[0080] In further embodiments not explicitly shown in the drawings, additional contact pairs can be formed on the identification interface 28 and the identification interfaces 29a to 29c, and these contact pairs can distinguish between an even larger number of different identification interfaces 29a to 29c.

[0081] Contacts 30a-30c, 32a-32c, 34a-34c, and 36a-36c can be arranged in a rectangular matrix as shown in Figures 3B and 4A to 4C.

[0082] However, the rectangular matrix arrangement of contacts 30a-30c, 32a-32c, 34a-34c, and 36a-36c shown in Figures 3B and 4A to 4C is merely illustrative. In other different embodiments not explicitly shown in the drawings, contacts 30a-30c, 32a-32c, 34a-34c, and 36a-36c may be arranged in other different arrangements or patterns.

[0083] Optical measurement systems 12, 12a, and 12b equipped with the identification interface 28 according to the present invention can uniquely identify the corresponding identification interfaces 29a to 29c connected to the identification interface 28 by detecting and evaluating the voltage applied to the input contacts 32a to 32c of the identification interface 28, or the current flowing through the electrical contacts 30a to 30c and 32a to 32c of the identification interface 28.

[0084] The optical measurement systems 12, 12a, and 12b can thus uniquely determine what type of calibration device 2a and 2b they are assembled to. This information can be taken into consideration when evaluating the images of the automobile 18 taken by the optical measurement systems 12, 12a, and 12b, allowing for highly accurate determination of the position and orientation of the calibration devices 2a and 2b relative to the automobile 18.

[0085] Therefore, the optical measurement systems 12, 12a, and 12b equipped with the identification interface 28 according to the present invention can be flexibly used in combination with various types of calibration devices 2a and 2b.

[0086] Therefore, a system for calibrating an automobile driver assistance system 20 equipped with various sensors 22a, 22b, which are configured in various ways and include a plurality of calibration devices 2a, 2b provided for calibrating various sensors 22a, 22b or sensor types of the automobile driver assistance system 20, can be operated using a single optical measurement system 12, or using a single pair consisting of optical measurement systems 12a, 12b, and the optical measurement systems 12, 12a, 12b or a pair consisting of optical measurement systems 12a, 12b can be alternately attached to various calibration devices 2a, 2b.

[0087] In this way, the effort and cost of providing a system equipped with multiple calibration devices 2a, 2b for calibrating an automobile driver assistance system 20 that includes multiple sensors 22a, 22b can be significantly reduced compared to a conventional system in which dedicated optical measurement systems 12, 12a, 12b, each of the calibration devices 2a, 2b, are securely installed on each of the calibration devices 2a, 2b.

Claims

1. An optical measurement system (12, 12a, 12b) that can be incorporated into various types of calibration devices (2, 2a, 2b) for an automobile driver assistance system (20), The optical measurement system (12, 12a, 12b) is A mechanical connecting device (16, 16a, 16b) configured to mechanically connect the optical measurement system (12, 12a, 12b) to the calibration device (2, 2a, 2b), An identification interface (28, 28a, 28b) that enables the optical measurement system (12, 12a, 12b) to identify the type of calibration device (2, 2a, 2b) into which the optical measurement system (12, 12a, 12b) is assembled, An optical measurement system (12, 12a, 12b) having the following features.

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

3. The aforementioned electrical interface includes a plurality of electrical contacts (30, 30a-30c, 32, 32a-32c), The optical measuring system (12, 12a, 12b) is configured to identify the type of calibration device (2, 2a, 2b) into which the optical measuring system (12, 12a, 12b) is assembled, based on the electrical connections (38a to 38c) formed between the electrical contacts (30, 30a to 30c, 32, 32a to 32c) by the calibration device (2, 2a, 2b). The optical measurement system (12, 12a, 12b) according to claim 2.

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

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

6. Calibration device (2, 2a, 2b) for calibrating an automobile driver assistance system (20), A mechanical connecting device (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, In order to enable the optical measurement system (12, 12a, 12b) to identify the type of calibration device (2, 2a, 2b), an identification interface (29a to 29c) is configured to cooperate with an identification interface (28, 28a, 28b) of the optical measurement system (12, 12a, 12b) that is mechanically connected to the calibration device (2, 2a, 2b), Calibration device (2, 2a, 2b) equipped with the following.

7. The aforementioned identification interfaces (29a to 29c) are electrical interfaces configured to cooperate with the corresponding electrical identification interfaces (28, 28a, 28b). Calibration device (2, 2a, 2b) according to claim 6.

8. The identification interface (29a to 29c) has at least one electrical connection (38a to 38c) that connects at least two electrical contacts (30a to 30c, 32a to 32c) of the identification interface (28, 28a, 28b) to each other. Calibration device (2, 2a, 2b) according to claim 7.

9. A system for calibrating an automobile driver assistance system (20), The aforementioned system, At least two different calibration devices (2, 2a, 2b) according to any one of claims 6 to 8, At least one optical measuring system (12, 12a, 12b) according to any one of claims 1 to 5, Equipped with, A system in which at least two different calibration devices (2, 2a, 2b) have identification interfaces (29a to 29c) configured to allow at least one optical measurement system (12, 12a, 12b) to distinguish between the at least two different calibration devices (2, 2a, 2b).

10. A method for calibrating an automobile driver assistance system (20), The aforementioned automobile driver assistance system (20) is A calibration device (2, 2a, 2b) according to any one of claims 6 to 8, An optical measurement system (12, 12a, 12b) according to any one of claims 1 to 5, Equipped with, The aforementioned method, The optical measurement system (12, 12a, 12b) is mechanically connected to the calibration device (2, 2a, 2b) using mechanical connection devices (16, 16a, 16b), The calibration devices (2, 2a, 2b) to which the optical measurement systems (12, 12a, 12b) are connected are identified using the identification type interfaces (28, 28a, 28b) of the optical measurement systems (12, 12a, 12b) and the identification type interfaces (29a to 29c) of the calibration devices (2, 2a, 2b). The position of the automobile (18) positioned in front of the calibration device (2, 2a, 2b) is determined using the optical measurement system (12, 12a, 12b), Methods that include...

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