Test assembly for sensor

Abstract

The invention relates to a test assembly (10) for a sensor (DUT), which is designed to detect an object by emitting a first electromagnetic signal (S1) and receiving a second electromagnetic signal (S2), comprising a chamber (K), which has a receptacle (AUF) for the sensor (DUT), and which further comprises at least two emitting / receiving devices (SE, SE1, SE2), the invention relates to a sensor (DUT) for a cabin (K), comprising at least two transmitting / receiving devices (SE, SE1, SE2), which are designed to receive a first signal (S1) emitted by the sensor (DUT) into the cabin (K) and to emit a second signal (S2) for reception by the sensor (DUT), each having a radiating element for radiating the second signal (S2), the distance between the at least two radiating elements can be changed in exactly one spatial direction by means of the spacing device.

Description

Technical Field

[0001] The present invention relates to a test component for a sensor. The sensor operates using electromagnetic waves and evaluates electromagnetic emission signals and electromagnetic reception signals. Background Art

[0002] A test bench for testing a distance sensor that operates using electromagnetic waves is known from WO 2020 / 127984 A1. The distance sensor to be tested includes at least one sensor radiation element for radiating an emission signal and a sensor receiving element for receiving a reflected signal. The test bench has a receiving portion for fixing the distance sensor to be tested, which has a at least partially movable slide in the radiation area of the distance sensor fixed in the receiving portion. At least one test bench receiving element fixed in the slide is provided for receiving the emission signal radiated by the sensor radiation element. At least one test bench radiation element fixed in the slide is provided for radiating a test bench emission signal as a simulated reflected signal. By jointly arranging at least one test bench receiving element and test bench radiation element in the movable part of the slide, reliable environmental simulation is achieved, especially for testing multi-input multi-output distance sensors.

[0003] An antenna measurement chamber for measuring the antenna characteristics of a high-frequency (HF) antenna is known from WO 2017 / 198613 A1, in which there are provided: a complete lining (Auskleidung) having a plurality of absorbers on its inner boundary surface, separate supports for the antenna to be tested and for the transmitting antenna, a double floor for invisible cable laying of the power supply and control lines for the antennas, and a support configured as a movable slide for one of the two antennas, which can move on the lower floor of the two floors of the double floor and which passes through the upper floor together with the lining located thereon.

[0004] A test bench for testing an environmental sensor that operates using electromagnetic waves is known from DE 102019123155 A1. The environmental sensor to be tested includes at least one sensor radiation element for radiating an emission signal and a sensor receiving element for receiving a reflected signal. The test bench has a receiving portion for fixing the environmental sensor to be tested, at least one swivel arm having a rotation axis, and a first test bench radiation element and / or a first test bench receiving element fixed on the swivel arm. The first test bench radiation element and / or the first test bench receiving element can be moved around the rotation axis independently of the orientation of the swivel arm within the field of view of the environmental sensor fixed in the receiving portion by means of the swivel arm, and the test bench receiving element is provided for receiving the emission signal radiated by the sensor radiation element and the test bench radiation element is provided for radiating a test bench emission signal as a simulated reflected signal. The swivel arm has a slidably supported support device. Summary of the Invention

[0005] A test component for a sensor is proposed. The sensor is configured to perform target detection by emitting a first electromagnetic signal and receiving a second electromagnetic signal. The test component has a chamber that has a receiving portion for the sensor. The chamber also has at least two transmitting / receiving devices that are arranged to receive the first signal emitted by the sensor into the chamber and to emit a second signal for the sensor to receive, and the at least two transmitting / receiving devices each have a radiation element for radiating the second signal. A spacing device is provided by means of which the distance between the at least two radiation elements can be changed in exactly one spatial direction.

[0006] The test component for a sensor has the following advantages: By means of the spacing device, a low-cost and simple angular distance measurement can be achieved with the test component, by means of which the distance between the at least two radiation elements can be changed in exactly one spatial direction. In this angular distance measurement, it is measured at which angle the sensor can still separately perceive the received second signal that has been reflected on two adjacent objects.

[0007] By the possibility of changing the distance between the at least two radiation elements in only one linear spatial direction, this parameter can be tested more specifically.

[0008] The sensor for target detection can in particular be an environmental sensor for use in a vehicle. Such an environmental sensor operates with electromagnetic waves and is used, for example, as a distance sensor. For this purpose, a radar sensor with a wavelength in the microwave range is used, for example. However, the test component is also suitable for sensors that operate in other frequency ranges of electromagnetic waves, in particular environmental sensors, such as sensors that operate in the visible light range or sensors that work together with an electromagnetic radiation source that emits long-coherence-length electromagnetic waves, such as in laser applications (such as lidar).

[0009] The sensor, in particular an environmental sensor, can here emit a first signal and receive its reflection as a second signal. By evaluating the first and second signals, information about the presence of an object, the distance to the object, the relative speed, and / or other characteristics of the object, such as size and / or surface characteristics, can be obtained.

[0010] A test assembly can be understood as a device that is provided for testing a sensor for object detection before it is installed in a vehicle, for example. For this purpose, the test assembly has a receptacle as a fixing device in order to accommodate the sensor as a so-called device under test. The sensor can thus emit a first electromagnetic signal into a compartment of the test assembly and receive a second electromagnetic signal from the compartment. Thus, the functionality of the sensor can be reliably tested by the test assembly.

[0011] For this purpose, the test assembly has a transmitting / receiving device which can simulate an object by receiving a first signal from a sensor and transmitting a second signal to the sensor. The test assembly has the advantage that by varying the distance between the radiating elements it is possible to find the distance between two radiating elements, i.e. between two simulated objects, at which such a sensor can still distinguish between the two objects.

[0012] The test assembly thus provides not only a mechanical structure for fixing the sensor in the receptacle, but also its own transceiver, which receives a first signal emitted by the sensor and transmits a second signal to the sensor. For this purpose, corresponding control and evaluation are then also performed, for example, on a computing unit, to complete such a test assembly. Such a test assembly enables the sensor to be tested in many scenarios before it is installed, for example, in a vehicle.

[0013] The sensor according to the present application can be, for example, a radar sensor or a lidar sensor. The radar sensor can, for example, emit a first signal at a frequency of 24 GHz, 60 GHz or 77 GHz. For example, a lidar signal is emitted in the near infrared range. For this purpose, the sensor therefore has a transmitter, for example a radar transmitter or a lidar transmitter, and a receiver, i.e. a corresponding radar receiver or a lidar receiver.

[0014] Radar or lidar sensors can be used for object detection. This means that such sensors can be designed to recognize objects, classify them and / or subsequently also continue to track them. An important criterion is that the sensor can distinguish two objects from one another, even if they are close to one another. This is a requirement that such sensors must reliably meet, especially at greater distances.

[0015] The spacing device hereby makes it possible to change the distance of the radiating elements linearly in precisely one spatial direction, in order thereby to change the distance of the simulated objects from one another and thereby to be able to determine at which distance two objects are no longer distinguishable or just still distinguishable for the sensor. The spacing device is hereby provided to enable a change in the position and thus the distance of the at least two radiating elements from one another in one spatial direction and thereby simultaneously to fix their position and thus the distance in the other spatial direction.

[0016] The test component currently has a chamber into which the sensor can emit a first signal and from which the sensor can receive a second signal. Thus, a defined environment for testing the sensor exists. In particular, such a chamber can be lined with a corresponding absorber to avoid unwanted reflections, so that only the second signal emitted by the at least two transmitting / receiving devices is visible to the sensor and accordingly received, and interfering radiation is largely eliminated.

[0017] Therefore, the at least two transmitting / receiving devices are arranged, like the sensor itself, for emitting and receiving radar radiation or lidar radiation. However, they can be designed more simply, identically, or more complexly. They must receive the first signal and can emit such a second signal based on the first signal so as to simulate an object for the sensor. Thus, a controlled simulation can be achieved in the chamber. The two transmitting / receiving devices each have a radiation element for radiating the second signal. In a radar sensor, the radiation element can be, for example, a transmitting antenna. In a lidar sensor, the radiation element can be, for example, an optical radiator.

[0018] An advantage provided by the test component is especially that the positions of the radiation elements relative to each other can be changed. This is important because the resolution of the points at which radiation is to be tested should be examined. That is, it is desirable for the points at which the second signal is to be emitted to the sensor to be as close to each other as possible to test the finest possible resolution.

[0019] A spacing device (the possible designs of which are given in the dependent claims) enables the distance between the at least two radiation elements to be linearly changed in exactly one spatial direction. This linear spatial direction can be, for example, a horizontal line, but can also be a vertical line. When changing horizontally, the so-called azimuth angle at which two objects can still be distinguished is found. When the two radiation elements are vertically spaced apart, the minimum elevation angle at which the two radiation elements can still be distinguished from each other is found.

[0020] Therefore, the test component provides the following advantage: the radiation elements of the transmitting / receiving device can be changed in only one direction in space and can be fixed in space with respect to the other directions.

[0021] Therefore, the test component provides the following advantage: the radiation elements of the transmitting / receiving device can, for example, be mounted at the same height, i.e., at the same elevation angle, and during testing, only the lateral distance, i.e., the azimuth angle, can be changed.

[0022] Alternatively, the radiation elements of the transmitting / receiving device can be mounted on the same vertical line, i.e., at the same azimuth angle, and during testing, only the height, i.e., the elevation angle, can be changed.

[0023] If, in addition to the radiation element, each transmitting / receiving device also uses a separate receiving element, then in one embodiment the position of the receiving element can be changed together with the radiation element in such a way that no phase shift is introduced between the receiving element and the radiation element. Advantageously, the radiation element and the receiving element of the transmitting / receiving device are kept as close to each other as possible to avoid phase shifts. The sensor expects a response from the same direction from which it also transmits. Therefore, it is preferably provided that the radiation element and the receiving element move together.

[0024] In one embodiment, the spacing device has at least one guide rail by means of which the distance between the at least two radiation elements can be changed in exactly one spatial direction. The change in the distance can be achieved particularly precisely and reliably by means of the guide rail. This can then be carried out, for example, manually or automatically. In order to change the distance in a linear spatial direction, the guide rail is in particular configured as a straight guide rail which enables the radiation elements to move on a straight track in space.

[0025] Furthermore, it is proposed that the distance between the at least two transmitting / receiving devices can be changed in exactly one spatial direction by means of the spacing device, which spacing device in particular has at least one guide rail by means of which the distance between the at least two transmitting / receiving devices can be changed in exactly one spatial direction. That is to say, it is possible to change the position of the at least two transmitting / receiving devices together with the respective radiation elements on the track. Here, the distances in other spatial directions also remain unchanged. In this embodiment, the guide rail is also configured as a straight guide rail in order to change the distance in a linear direction.

[0026] In an embodiment, the spacing device has a first operating device for manually changing the distance and / or a second operating device for automatically changing the distance. By manually changing the distance, the distance can then be changed individually according to the respective circumstances without having to enter other data. By automatically changing the distance, the following possibilities are given: a predetermined test program can be used and / or a reaction can be made dynamically to the response of the sensor. Therefore, for example, the distance can be adjusted according to a second signal and / or an evaluation carried out by the sensor. In this way, the distance at which two objects can just still be distinguished or can no longer be distinguished can be determined very precisely.

[0027] Furthermore, the chamber can have a plurality of modules which expand the chamber in at least one direction, which direction in particular extends from the sensor to the radiation element or the transmitting / receiving device. Therefore, by means of this modular structure, the distance between the sensor and the radiation element or the transmitting / receiving device can be adjusted according to the test requirements or the characteristics of the sensor. In this way, the test can be extended to greater distances.

[0028] Furthermore, it can be stipulated that the receiving part is configured to change the position and / or orientation of the sensor. Thus, the sensor is not only fixed in a rigid position, but its position can also be changed, so that, as a supplement to the spacer device, the geometric positions of the sensor and the at least two transmitting / receiving devices can be changed thereby. Accordingly, the orientation of the sensor (in which direction the sensor radiates the first signal) can also be changed. Thus, the target detection quality of the sensor can be judged very precisely.

[0029] As proposed above, the chamber is substantially lined with a material that absorbs electromagnetic signals in its interior space.

[0030] Furthermore, it is proposed that each of the at least two transmitting / receiving devices has a receiving element for receiving the first signal, and the radiation element and the receiving element of the corresponding transmitting / receiving device are arranged in a region of the wall in the interior space of the chamber, and the spacer device is arranged outside the chamber. This has the advantage that there is no need to particularly cover the spacer device to avoid unwanted reflections caused by the spacer device. In addition, the spacer device outside the chamber is easier to maintain or operate.

[0031] Furthermore, it is stipulated that each of the at least two transmitting / receiving devices has a transmitting converter and a receiving converter, and the transmitting converter and the receiving converter of the corresponding transmitting / receiving device are arranged outside the chamber. This also has the advantage that, for example, when the transmitting or receiving converter must or should be replaced, the test assembly can thus be more easily operated, and it is also not necessary to cover these two converters inside the chamber to avoid reflections. The corresponding radiation element of the corresponding transmitting / receiving device is connected to the transmitting converter via a waveguide here. The transmitting converter in particular converts an electrical baseband signal (such as the one it receives, for example, as a working signal via the interface of the transmitting / receiving element) into a modulated high-frequency signal (such as the one that can be radiated by the radiation unit). The corresponding receiving element of the corresponding transmitting / receiving device is connected to the receiving converter via a waveguide. The receiving converter in particular converts the modulated high-frequency signal output by the receiving element into a baseband signal (such as the one that can then be output, for example, as a working signal via the interface of the transmitting / receiving element).

[0032] Furthermore, it is proposed that the region in the wall of the chamber has slots through which the corresponding radiation element is connected to the corresponding transmitting converter via a waveguide and the corresponding receiving element is connected to the corresponding receiving converter via a waveguide. In this case, the connecting piece can be guided through the slot, i.e., an elongated opening in the chamber wall. The slot can also be covered in a simple manner accordingly to avoid reflections on the through-pieces. Preferably, waveguides are provided for connecting to the converters in order to be able to reliably transmit high-frequency signals. It is also possible that the slots are substantially covered with an absorbing material, especially on the inner side of the chamber.

[0033] In one embodiment, the region is configured as a wall insert for an opening in a wall, and the wall insert can in particular be inserted into the wall of a compartment in at least two different orientations. Thus, for example, the insert can be inserted differently by rotating it by 90° to test the azimuth or elevation angle.

[0034] Furthermore, it can be provided that the radiation element and the receiving element of the respective transmitting / receiving device are configured as a combined radiation / receiving element. In particular for a radar sensor, the radiation element can be configured as a transmitting antenna here and the receiving element can be configured as a receiving antenna.

[0035] The transmitting antenna and the receiving antenna can alternatively be configured as a single antenna, which can in particular be configured as a horn antenna or a curved antenna. By this measure, material can be saved or the horn antenna or the curved antenna is particularly suitable for the current purpose in order to enable a particularly small distance between the radiation elements of the respective transmitting / receiving device.

[0036] Furthermore, it is possible that such a combined antenna of the respective transmitting / receiving device is connected to a transceiver via a respective waveguide, and the transceiver has a transmitting converter and a receiving converter of the respective transmitting / receiving device.

[0037] It is possible that the sensor is configured as a radar sensor as described above or alternatively also as a lidar sensor.

[0038] In a method for testing a sensor (which is configured for object detection by transmitting a first electromagnetic signal and receiving a second electromagnetic signal), first, the sensor is positioned in a receiving part in an orientation relative to the transmitting / receiving device. Then, the distance between the respective radiation elements of the transmitting / receiving device is linearly changed in a spatial direction. The change in distance can also be carried out automatically, for example for an automated test process. Description of the Drawings

[0039] Embodiments are shown in the drawings and further explained in the following description. The drawings are as follows:

[0040] Figure 1 A schematic view showing a test assembly;

[0041] Figure 2 A schematic view showing a transmitting / receiving device;

[0042] Figure 3 A schematic view showing two transmitting / receiving devices on a guide rail;

[0043] Figure 4 A schematic view showing the guide rail;

[0044] Figure 5 A schematic overall view showing the test assembly; and

[0045] Figure 6 Another schematic diagram showing a test component with multiple modules.

[0046] In the drawings, the same reference numerals are used for the same or similar elements. The illustrations in the drawings may not be to scale. Detailed Description

[0047] Figure 1 A test component 10 is shown schematically, where the sensor DUT together with its antenna A3 is located in the receiving part AUF. In the illustrated embodiment, the sensor DUT is a sensor having an antenna for radiating and receiving signals S1, S2, i.e., for example, a radar sensor.

[0048] The sensor DUT radiates a first signal S1 into the chamber K via its antenna A3. Oppositely, two transmitting / receiving devices SE1 and SE2 are provided on the chamber K, and the two corresponding antennas A1 and A2 of the two transmitting / receiving devices SE1 and SE2 are located inside the chamber K. Outside the chamber K, the two transmitting / receiving devices SE1 and SE2 each have a transmitting converter TX1, TX2 and a receiving converter RX1, RX2. A spacing device BA is provided between the two transmitting / receiving devices SE1 and SE2, and the spacing device BA changes the distance between the two transmitting / receiving devices SE1 and SE2 in exactly one spatial direction, which spatial direction is especially a linear direction in space.

[0049] Furthermore, the sensor DUT is configured to receive and evaluate a second signal S2 via its antenna A3. The antenna A3 is thus a combined transmitting and receiving antenna.

[0050] The position between the transmitting / receiving devices SE1 and SE2 can be changed automatically or manually by the spacing device BA. The antennas A1 and A2 are used both for radiating the second signal S2 and for receiving the first signal S1. Thus, antennas A1, A2 are involved, in which the transmitting antenna and the receiving antenna are combined in one antenna A1, A2. They are respectively connected to the transmitting or receiving converters TX1, TX2, RX1, RX2 of the transmitting / receiving devices SE1 and SE2 via waveguides.

[0051] Figure 2 The transmitting / receiving device SE is shown schematically in another diagram. The antenna A is connected to the receiving converter RX or the transmitting converter TX via a waveguide WL. The transmitting and receiving converters TX and RX are connected to the computer RE on the other side on their side. The receiving converter RX converts the first signal S1 into a working signal so that the first signal can be transmitted to the computer RE for further processing, and the computer RE controls the transmitting converter TX via another working signal to radiate the second signal S2 via the waveguide WL and the antenna A.

[0052] The waveguide WL is guided through a slot SL in the wall W of the chamber K. The wall W is covered inside the chamber K with an absorption material AB so that no undesired reflections are generated by the first signal S1. Thus, the absorption material AB is arranged on the wall W of the chamber K. In the example shown, the spacer device BA is configured as a guide rail SI. The guide rail SI is located behind the wall W and enables the distance between the antenna A and another antenna A to be changed. It is possible here that other components of the transmitting / receiving device SE, in particular the transmitting converter TX and / or the receiving converter RX, remain at their respective positions outside the chamber K. It is also possible that, in addition to the antenna A of the transmitting / receiving device SE, the transmitting / receiving device SE together with its transmitting converter TX and its receiving converter RX also changes the distance between them by means of the guide rail SI. Technically decisive is the distance between the antennas A, since the antennas A simulate the reflection of the first signal S1 by means of the second signal S2 they transmit.

[0053] Figure 3 A wall insert WE for an opening 40 of the chamber K ( Figure 4 ) is shown schematically, which has a guide rail SI and the receiving converters RX1, RX2 and the transmitting converters TX1, TX2 of two transmitting / receiving devices SE1 and SE2. The guide rail SI together with the receiving converters RX1, RX2 and the transmitting converters TX1, TX2 is located outside the chamber K. Thus, the wall insert WE is shown as it appears when viewed from outside the chamber K.

[0054] Figure 4 A view of the other side of the wall insert WE is shown as it results when looking down from inside the chamber K in the installed state of the wall insert WE. Two antennas A1 and A2 are arranged inside the chamber K in front of the slot SL.

[0055] The antennas are connected via the waveguide WL through the slot SL to their respective, belonging transmitting / receiving converters TX1, TX2, RX1, RX2. Thus, by means of the guide rail SI the transmitting / receiving devices SE1, SE2 can be moved together with their antennas A1, A2. Thereby, the distance between the transmitting / receiving devices SE1, SE2 and thus also between the antennas A1, A2 can be changed in the direction of the guide rail SI.

[0056] The slot SL can be covered with the absorption material AB and thus also substantially cover the guide rail SI installed outside the chamber K. Then the absorption material AB can also be provided with slots, for example, and be widened only by the waveguide WL and / or the antennas A1, A2 at the places where the waveguide or the antennas are guided through the slots in the slot SL and the absorption material AB.

[0057] Figure 5The test assembly 10 located on the support with a chamber K and an opening 40 is shown schematically, and the wall insert WE can be inserted into the opening. In this case, the sensor DUT is arranged on the opposite side of the chamber K. The illustration is schematic and the wall insert WE can be configured larger or smaller relative to the wall of the chamber K than shown in the figure.

[0058] Figure 6 The entire test assembly 10 is shown, which has a length L in the horizontal direction and a height H in the vertical direction, where the chamber K is now formed by a plurality of modules M1 to M4. In the module M4, the sensor DUT is arranged in the receiving part AUF, and the door DO is arranged in the module M4 for arranging the sensor DUT. The length L of the chamber K is extended by the modules M1 to M4. This length can also be further extended in its direction L by additional modules.

[0059] The wall insert WE is arranged in the wall W of the chamber K and has antennas A1 and A2, which are connected via waveguides WL to the respective transmitting and receiving converters RX1, RX2, TX1, and TX2. Thus, the distance between the antennas A1 and A2 can be changed until the sensor DUT can no longer detect the two antennas A1 and A2 as separate objects. The receiving and transmitting converters RX1, RX2, TX1, and TX2 are connected to a computer RE, which controls the transmitting / receiving devices SE1 and SE2 or evaluates the received signals and transmits the corresponding transmission signals. This is an exemplary illustration. In practice, it is entirely possible and also common to provide a computing unit for each transmitting / receiving device, that is, a computing unit for each pair of transmitting and receiving converters TX1 / RX1, TX2 / RX2.

[0060] List of reference numerals

[0061] 10 Test assembly

[0062] 40 Opening

[0063] A, A1, A2, A3 Antenna

[0064] BA Spacing device

[0065] DUT Sensor

[0066] AUF Receiving part

[0067] S1 First signal

[0068] S2 Second signal

[0069] SE, SE1, SE2 Transmitting / receiving device

[0070] K Chamber

[0071] WL waveguide

[0072] M1, M2, M3, M4 cabin modules

[0073] TX, TX1, TX2 transmit converters

[0074] RX, RX1, RX2 receive converters

[0075] SI guide rail

[0076] W wall

[0077] AB absorption material

[0078] RE calculation unit

[0079] WE wall insert

[0080] SL slot

[0081] DO door

[0082] H cabin height

[0083] L cabin length

Claims

1. A test assembly (10) for a sensor (DUT), the sensor being configured to perform target detection by emitting a first electromagnetic signal (S1) and by receiving a second electromagnetic signal (S2), the test assembly (10) having a chamber (K) which has a receptacle (AUF) for the sensor (DUT), the test assembly (10) further having at least two transmitting / receiving devices (SE, SE1, SE2), the at least two transmitting / receiving devices being arranged to receive the first signal (S1) emitted by the sensor (DUT) into the chamber (K) and to emit a second signal (S2) for the sensor (DUT) to receive, the at least two transmitting / receiving devices (SE, SE1, SE2) each having a radiation element for radiating the second signal (S2), wherein, A spacing device (BA) is provided, by means of which the distance between the at least two radiation elements can be changed in exactly one spatial direction.

2. The test component according to claim 1, wherein The spacing device has at least one guide rail (SI), by means of which the distance between the at least two radiation elements can be changed in exactly one spatial direction.

3. The test component according to claim 1 or 2, wherein, By means of the spacing device, the distance between the at least two transmitting / receiving devices (SE, SE1, SE2) can be changed in exactly one spatial direction. The spacing device in particular has at least one guide rail (SI), by means of which the distance between the at least two transmitting / receiving devices (SE, SE1, SE2) can be changed in exactly one spatial direction.

4. The test component according to any one of the preceding claims, wherein, The spacing device has a first operating device for manually changing the distance and / or a second operating device for automatically changing the distance.

5. The test component according to any one of the preceding claims, wherein, The chamber has a plurality of modules (M1, M2, M3, M4), which enlarge the chamber (K) in at least one direction, which direction in particular extends from the sensor to the at least two radiation elements of the test assembly.

6. The test component according to any one of the preceding claims, wherein, The receiving part (AUF) is configured to change the position and / or orientation of the sensor (DUT).

7. The test component according to any one of the preceding claims, wherein, The chamber (K) is substantially lined with a material (AB) that absorbs electromagnetic signals in its interior space.

8. The test component according to any one of the preceding claims, wherein, Each of the at least two transmitting / receiving devices (SE, SE1, SE2) has a receiving element for receiving a first signal (S1). The radiation element and the receiving element of the respective transmitting / receiving device are arranged in the interior space of the chamber (K) in the region of the chamber (K) wall, and the spacing device is arranged outside the chamber.

9. The test component according to claim 8, wherein, Each of the at least two transmitting / receiving devices (SE, SE1, SE2) has a transmitting converter (TX, TX1, TX2) and a receiving converter (RX, RX1, RX2). The transmitting converters (TX, TX1, TX2) and the receiving converters (RX, RX1, RX2) of the respective transmitting / receiving devices (SE, SE1, SE2) are arranged outside the chamber.

10. The test component according to claim 9, wherein, The region has slots, through which the respective radiation element is connected to the respective transmitting converter (TX, TX1, TX2) via a waveguide (WL), and the respective receiving element is connected to the respective receiving converter (RX, RX1, RX2) via a waveguide.

11. The test component according to claim 10, wherein, The slots are substantially covered with an absorbing material on the inner side of the chamber.

12. The test component according to any one of claims 8 to 11, wherein The region is configured as a wall insert (WE) for an opening (40) in the wall. The wall insert (WE) can in particular be inserted into the wall (W) of the chamber (K) in at least two different orientations.

13. The test component according to any one of claims 8 to 12, wherein, The radiation element and the receiving element of the respective transmitting / receiving device (SE, SE1, SE2) are configured as a combined radiation / receiving element.

14. The test component according to any one of the preceding claims, wherein, The sensor (DUT) is a radar sensor. The radiation element is configured as a transmitting antenna and the receiving element is configured as a receiving antenna.

15. The test component according to claim 14, wherein, The transmitting antenna and the receiving antenna of the corresponding transmitting / receiving device (SE, SE1, SE2) are configured as one antenna (A, A1, A2), and the antenna (A, A1, A2) is in particular configured as a horn antenna or a curved antenna.

16. The test component according to claim 15, wherein, The area has a slot through which the corresponding antenna (A, A1, A2) of the corresponding transmitting / receiving device (SE, SE1, SE2) is connected via a corresponding waveguide (WL) to a transceiver, which has a transmitting converter (TX, TX1, TX2) and a receiving converter (RX, RX1, RX2) of the corresponding transmitting / receiving device (SE, SE1, SE2).

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