System for electromagnetic interference immunity performance testing of vehicle-mounted fusion ADAS functions

Abstract

The present invention proposes a system for electromagnetic interference resistance performance testing of vehicle-mounted fusion ADAS functions, including a radar target simulator, a video player and an EMS antenna arranged in an anechoic chamber, a controller and a radio frequency signal source outside the anechoic chamber, and a signal transmission module for realizing information transmission inside and outside the anechoic chamber; the millimeter-wave radar receives the echo signal under different simulated working conditions emitted by the radar target simulator, and the ADAS camera of the tested vehicle collects the road scene image played by the video player synchronized with the simulated working conditions of the echo signal. The system can perform electromagnetic interference resistance testing of the whole vehicle ADAS system under various simulated working conditions when the vehicle-mounted millimeter-wave radar and the camera are fused, so that the electromagnetic interference resistance testing of the automobile ADAS system is more in line with the actual use situation, and the test results are more valuable for reference and research, promoting the development and progress of the ADAS system.

Description

Technical Field

[0001] The present invention relates to the field of automobile electromagnetic compatibility testing, and in particular to a system for testing electromagnetic anti-interference performance of vehicle-mounted fusion ADAS functions. Background Art

[0002] Advanced Driving Assistance System (ADAS) uses various sensors installed on the car to sense the surrounding environment at any time during driving, collect data, identify, detect and track static and dynamic objects, and combine with navigation map data to perform systematic calculations and analysis, so as to make the driver aware of possible dangers in advance and effectively increase the comfort and safety of car driving.

[0003] There are more and more mass-produced models of vehicle-mounted advanced driver assistance systems (ADAS systems) based on the fusion of millimeter-wave radar and camera. Due to the increase in wireless communication devices in the environment, the road electromagnetic environment is becoming increasingly complex, and the vehicle-mounted ADAS system is facing various electromagnetic interference. At present, companies only test the functions and performance of vehicle-mounted advanced driver assistance systems based on the fusion of millimeter-wave radar and camera during the automobile research and development stage, and in the existing electromagnetic anti-interference performance tests, only separate vehicle-mounted millimeter-wave radars or separate video systems are tested, and the electromagnetic anti-interference performance of vehicle-mounted fusion ADAS systems based on millimeter-wave radars and cameras is not considered. There is a lack of a set of electromagnetic anti-interference performance test systems and methods suitable for vehicle-mounted fusion ADAS systems. Summary of the invention

[0004] In order to overcome the defects existing in the above-mentioned prior art, an object of the present invention is to provide a system for testing the electromagnetic interference immunity performance of vehicle-mounted fusion ADAS functions.

[0005] In order to achieve the above-mentioned object of the present invention, the present invention provides a system for electromagnetic interference resistance performance testing of vehicle-mounted fusion ADAS functions, including a radar target simulator, a video playback device and an EMS antenna arranged in an anechoic chamber, a controller and a radio frequency signal source outside the anechoic chamber, and a signal transmission module for realizing information transmission inside and outside the anechoic chamber;

[0006] The vehicle under test in the anechoic chamber is provided with a millimeter-wave radar and an ADAS camera, wherein the millimeter-wave radar receives echo signals under different simulated working conditions emitted by a radar target simulator, and the ADAS camera of the vehicle under test collects road scene images played by a video player synchronized with the simulated working conditions of the echo signals;

[0007] The signal transmission end of the controller is connected to the first signal transmission end of the signal transmission module, the second signal transmission end of the signal transmission module is connected to the signal transmission end of the video playback device, and the third signal transmission end of the signal transmission module is connected to the signal transmission end of the radar target simulator;

[0008] The signal output end of the radio frequency signal source is connected to the wired end of the EMS antenna.

[0009] The beneficial effects of the above technical solution are: the system sets the radar target simulator and video playback equipment in the anechoic chamber, making the electromagnetic anti-interference test more convenient and flexible; the system can perform electromagnetic anti-interference tests on the whole vehicle ADAS system under various simulated working conditions when the vehicle-mounted millimeter-wave radar and camera are integrated, so that the electromagnetic anti-interference test of the automobile ADAS system is more in line with actual usage, and the test results are more valuable for reference and research, which is conducive to timely prediction of safety and stability issues of the ADAS system and promote the development and progress of the ADAS system.

[0010] In a preferred embodiment of the present invention, the radar target simulator is located in front of the millimeter-wave radar of the vehicle under test, and the video playback device is located in front of the ADAS camera of the vehicle under test.

[0011] The beneficial effects of the above technical solution are: further accurately simulating actual application scenarios and improving the reference and research value of electromagnetic anti-interference test results.

[0012] In a preferred embodiment of the present invention, it further comprises a millimeter wave absorption dark box disposed between the millimeter wave radar of the vehicle under test and the radar target simulator;

[0013] And / or also includes a height adjustment platform, and the radar target simulator is placed on the height adjustment platform.

[0014] The beneficial effects of the above technical solution are: the radar wave is propagated only on the line-of-sight transmission path between the vehicle-mounted millimeter-wave radar and the radar target simulator through the millimeter-wave absorption dark box, thereby removing false targets in the test environment. The height of the radar target simulator is adjusted by the height adjustment table so that the transceiver antenna of the radar target simulator is aligned with the main lobe beam of the vehicle-mounted millimeter-wave radar.

[0015] In a preferred embodiment of the present invention, the radar target simulator is provided with an electromagnetic shielding device 1;

[0016] And / or the video playback device is provided with a second electromagnetic shielding device.

[0017] The beneficial effects of the above technical solution are: electromagnetic protection treatment is performed on the radar target simulator and the video playback device to prevent EMS antenna interference from affecting the quality of the echo signal output by the radar target simulator and the quality of the video image played by the video, thereby avoiding the introduction of errors into the electromagnetic anti-interference test results of the ADAS system.

[0018] In a preferred implementation manner of the present invention, the interference control terminal of the controller is connected to the control terminal of the radio frequency signal source.

[0019] The beneficial effect of the above technical solution is: it is easy to control the RF signal source to output various electromagnetic interference signals that meet the actual application scenarios, making the electromagnetic anti-interference test of the ADAS system more comprehensive.

[0020] In a preferred embodiment of the present invention, it also includes an EMS power amplifier connected in series to a connection path between a signal output end of the radio frequency signal source and a wired end of the EMS antenna.

[0021] The beneficial effect of the above technical solution is that the electromagnetic interference signal output by the radio frequency signal source can be amplified by the EMS power amplifier.

[0022] In a preferred embodiment of the present invention, the signal transmission module includes a photoelectric conversion module and an electro-optical conversion module, the signal transmission end of the video playback device is connected to the first electrical signal connection end of the photoelectric conversion module, the signal transmission end of the radar target simulator is connected to the second electrical signal connection end of the photoelectric conversion module, the optical transmission end of the photoelectric conversion module is connected to the optical transmission end of the electro-optical conversion module, and the electrical signal connection end of the electro-optical conversion module is connected to the signal transmission end of the controller.

[0023] The beneficial effect of the above technical solution is that the interactive signals between the video playback device, the radar target simulator and the controller are converted into optical signal transmission, which can effectively avoid the influence of electromagnetic interference signals in the anechoic room on the interactive signals.

[0024] In a preferred embodiment of the present invention, the controller, the electro-optical conversion module and the radio frequency signal source are arranged in an EMC control room, and the photoelectric conversion module is arranged in an anechoic chamber.

[0025] The beneficial effect of the above technical solution is: further effectively avoiding interference signals from electromagnetic interference signals in the anechoic room.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 It is a schematic diagram of system layout in a preferred embodiment of the present invention.

[0029] Reference numerals:

[0030] 2ADAS camera; 3Video playback device; 4EMS antenna; 5Millimeter wave radar; 6Millimeter wave absorption dark box; 7Radar target simulator; 8Height adjustment table; 9Test vehicle; 10Controller; 11RF signal source; 12EMS amplifier; 13Anechoic chamber; 14EMC control room; 15Photoelectric conversion module; 16Electro-optical conversion module. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0033] The present invention discloses a system for testing electromagnetic interference immunity performance of vehicle-mounted fusion ADAS functions, and its system structure and layout are as follows: Figure 1 As shown, it includes a radar target simulator 7, a video playback device 3 and an EMS antenna 4 arranged in an anechoic chamber 13, a controller 10 and a radio frequency signal source 11 outside the anechoic chamber 13, and a signal transmission module for realizing information transmission inside and outside the anechoic chamber 13;

[0034] The vehicle under test 9 in the anechoic chamber 13 is provided with a millimeter wave radar 5 and an ADAS camera 2. The millimeter wave radar 5 receives echo signals under different simulated working conditions emitted by the radar target simulator 7. The ADAS camera 2 of the vehicle under test 9 collects road scene images played by the video player 3 in synchronization with the simulated working conditions of the echo signals.

[0035] The signal transmission end of the controller 10 is connected to the first signal transmission end of the signal transmission module, the second signal transmission end of the signal transmission module is connected to the signal transmission end of the video playback device 3, and the third signal transmission end of the signal transmission module is connected to the signal transmission end of the radar target simulator 7;

[0036] The signal output end of the RF signal source 11 is connected to the wired end of the EMS antenna 4 .

[0037] In this embodiment, the RF signal source 11 is preferably, but not limited to, a RF comprehensive tester or a vector signal source.

[0038] In this embodiment, the video playback device 3 is preferably, but not limited to, an electronic display screen or a projection device.

[0039] In this embodiment, the simulated working condition refers to various application scenarios of the ACC (Adaptive Cruise Control) system, FCW (Forward Collision Warning) system and AEB (Automatic Emergency Braking) system in the actual driving process of the automobile, such as ACC acceleration following the car, ACC constant speed following the car, ACC deceleration following the car, the front car emergency approach triggering the FCW system, the front car emergency approach triggering the AEB system, etc. The road scene image corresponding to each simulated working condition can be a video file recorded by an actual dummy driving test of each working condition, or a dedicated virtual scene video image pre-generated by the automobile advanced driver assistance system test simulation software.

[0040] In this embodiment, the EMS antenna is an antenna used for the EMS electromagnetic anti-interference (Electro Magnetic Susceptibility, which refers to the ability of machines, equipment and systems to have a certain degree of immunity to electromagnetic interference in a certain environment, that is, electromagnetic sensitivity) test item.

[0041] In this embodiment, the controller 10 is used to transmit the video playback file and radar echo signal setting parameters synchronized with the simulated working conditions to the video playback device 3 and the radar target simulator 7 .

[0042] In this embodiment, the controller 10 is preferably, but not limited to, a PC, a laptop, etc. Preferably, the relevant parameters or execution files of the echo signals of each simulated working condition, as well as the synchronized video playback files, are stored in advance in the memory (such as a hard disk) inside the controller 10. In this way, in the electromagnetic interference test, the controller 10 outputs the relevant parameters or execution files of the echo signals synchronized with the simulated working condition and the screen playback files to the radar target simulator 7 and the video playback device 3, respectively, so that the road scene image played by the video playback device 3 in the anechoic chamber 13 is synchronized with the simulated working condition of the echo signal emitted by the radar target simulator 7.

[0043] In this embodiment, after completing the electromagnetic anti-interference test, the staff reads the information generated by the ADAS system during the test and performs subsequent result analysis.

[0044] In this embodiment, preferably, the EMS antenna 4 includes a plurality of sub-antennas that are dispersedly arranged or centrally arranged, and the RF signal source 11 includes a sub-signal source or a plurality of sub-signal sources that emit electromagnetic interference signals of different frequency bands and / or different modulation modes. When the RF signal source 11 includes a sub-signal source, the output end of the sub-signal source is respectively connected to the wired end of the sub-antenna, so that the electromagnetic interference signal simulated by the EMS antenna is spread all around the ADAS system to be tested, which is more in line with the actual situation and improves the accuracy of the anti-interference test. When the RF signal source 11 includes a plurality of sub-signal sources, the output end of each sub-signal source is connected to the output end of at least one sub-antenna, and the controller 10 controls the sub-signal source to output electromagnetic interference signals of different frequency bands or different modulation modes or different frequency bands and modulation modes, such as respectively outputting 3G Unicom signals, 3G Mobile signals, 3G Telecom signals, 4G signals, 2G signals and WI FI signals, so that the electromagnetic interference environment of the ADAS system to be tested is closer to the actual situation, which is also conducive to improving the accuracy of the anti-interference test. In this embodiment, preferably, the test system further includes a weather simulation device disposed in the anechoic chamber 13, and the weather simulation device includes a fogging device, a raining device, and a snowing device disposed obliquely above the vehicle 9 under test, so that the ADAS camera 2 and the millimeter-wave radar 5 need to detect light signals and radar signals through fog, rain, and snow, and the fogging device, the raining device, and the snowing device can be turned on or off by an external controller 10. This enables the system to perform electromagnetic field interference tests on the ADAS system under test in various weather environments, thereby improving the validity of the test results and the value of reference and research.

[0045] In this embodiment, preferably, the weather simulation device also includes a transparent box disposed between the ADAS camera 2 and the video playback device 3 and / or between the millimeter-wave radar 5 and the radar target simulator 7, and the fog generating device, the rainfall device and the snowfall device are disposed on the top of the transparent box, respectively releasing fog, rain and snow into the transparent box, and the ADAS camera 2 and / or the millimeter-wave radar 5 need to detect the light signal and the radar signal through the transparent box. The transparent box is located between the DAS camera 2 and the video playback device 3, or between the millimeter-wave radar 5 and the radar target simulator 7, or between the DAS camera 2 and the video playback device 3 and between the millimeter-wave radar 5 and the radar target simulator 7. Preferably, the transparent box is made of fully transparent glass so as not to affect the ability of the ADAS camera 2 and the millimeter-wave radar 5 to receive light signals and radar signals. At the same time, fog, rain and snow are only generated in the transparent box, and will not affect the operating stability of other components in the system (such as the radar target simulator 7, etc.).

[0046] In a preferred embodiment, the radar target simulator 7 is located in front of the millimeter-wave radar 5 of the vehicle under test 9. Further preferably, the radar target simulator 7 is located 1 meter to 2 meters in front of the millimeter-wave radar 5 of the vehicle under test 9, and the laser aligner in the radar target simulator 7 needs to be aligned with the millimeter-wave radar 5 under test.

[0047] In a preferred embodiment, the video playback device 3 is located in front of the ADAS camera 2 of the vehicle under test 9, and the video image is routinely calibrated before the electromagnetic anti-interference test. Further preferably, the RF images played by the video playback device 3 are all within the field of view of the ADAS camera 2.

[0048] In this embodiment, the anechoic chamber 13 is a closed room, all the peripheries of the room are provided with a shielding layer, and the inner walls of the room are provided with Figure 1 The sawtooth absorber shown.

[0049] In this embodiment, preferably, the interference control end of the controller 10 is connected to the control end of the RF signal source 11; preferably, the RF signal source 11 is preferably but not limited to a RF comprehensive tester, which can be connected and communicated with the controller through an instrument interface and a cable.

[0050] In this embodiment, the wired end of the EMS antenna 4 is preferably but not limited to being connected to the output end of the RF signal source 11 through a low-loss dedicated RF cable with a shielding function, and a through hole is provided in the anechoic chamber 13 for the RF cable to pass through. Preferably, electromagnetic shielding protection is required around the through hole to prevent external interference signals from entering the anechoic chamber 13.

[0051] In a preferred embodiment, it also includes a millimeter wave absorption dark box 6 disposed between the millimeter wave radar 5 of the vehicle under test 9 and the radar target simulator 7;

[0052] And / or further includes a height adjustment platform 8 , on which the radar target simulator 7 is placed.

[0053] In this embodiment, the millimeter wave absorbing dark box 6 is preferably but not limited to being made of a plate-shaped or box-shaped absorbing material with a through hole in the middle, which allows an interference-free communication space channel between the millimeter wave radar 5 and the radar target simulator 7.

[0054] In a preferred embodiment, the radar target simulator 7 is provided with an electromagnetic shielding device 1;

[0055] And / or the video playback device 3 is provided with an electromagnetic shielding device 2.

[0056] In this embodiment, the electromagnetic shielding device 1 is preferably but not limited to a metal shielding cover or a metal shielding net or a shielding material adhesion layer arranged outside the radar target simulator 7, and the metal shielding cover or the metal shielding net or the shielding material adhesion layer has a hole reserved for the output of the echo signal; the electromagnetic shielding device 2 is preferably but not limited to a metal shielding cover or a metal shielding net or a shielding material adhesion layer arranged outside the video playback device 3, and the metal shielding cover or the metal shielding net or the shielding material adhesion layer has a hole reserved for displaying the video image.

[0057] In this embodiment, preferably, the electromagnetic shielding device 1 also includes anti-electromagnetic interference elements such as magnetic beads arranged on the internal interface circuit of the radar target simulator 7 and a metal shielding cover on the circuit board; the electromagnetic shielding device 2 also includes anti-electromagnetic interference elements such as magnetic beads arranged on the internal interface circuit of the video playback device 3 and a metal shielding cover on the circuit board.

[0058] In a preferred embodiment, it also includes an EMS power amplifier 12 connected in series to the connection path between the signal output end of the RF signal source 11 and the wired end of the EMS antenna 4 .

[0059] In this embodiment, preferably, when the video playback device 3 is an electronic display screen, the electronic display screen is placed in front of the ADAS camera 2, and the position of the electronic display screen is adjusted according to the position of the ADAS camera 2, so that the electronic display screen and the central axis of the ADAS camera 2 are located in a straight line; further preferably, it also includes a support mechanism that supports the electronic display screen and adjusts the position of the electronic display screen, and the support mechanism includes a base, a plurality of rollers provided at the lower end of the base, and at least one retractable vertical rod provided at the upper end of the base, and a video playback device installation portion is provided on the vertical rod. The roller is preferably a universal wheel, which can drive the electronic display screen to move in the radio darkroom to adjust the plane position of the electronic display screen in the microwave darkroom, and the height of the electronic display screen can be adjusted by retracting the vertical rod. The video playback device installation portion is preferably, but not limited to, an existing card-embedded structure or a hook.

[0060] In a preferred embodiment, the signal transmission module includes a photoelectric conversion module 15 and an electro-optical conversion module 16, the signal transmission end of the video playback device 3 is connected to the first electrical signal connection end of the photoelectric conversion module 15, the signal transmission end of the radar target simulator 7 is connected to the second electrical signal connection end of the photoelectric conversion module 15, the optical transmission end of the photoelectric conversion module 15 is connected to the optical transmission end of the photoelectric conversion module 16, and the electrical signal connection end of the electro-optical conversion module 16 is connected to the signal transmission end of the controller 10.

[0061] In this embodiment, the optical transmission end of the photoelectric conversion module 15 and the optical transmission end of the electro-optical conversion module 16 are preferably connected via an optical fiber, so that long-distance interference-free signal transmission can be achieved.

[0062] In an application scenario of the present embodiment, the photoelectric conversion module 15 includes a first photoelectric conversion unit and a second photoelectric conversion unit, the output end of the first photoelectric conversion unit is connected to the signal input end of the video playback device 3 through a wire, and the output end of the second photoelectric conversion unit is connected to the signal input end of the radar target simulator 7 through a wire; the electro-optical conversion module 16 includes a first electro-optical conversion unit and a second electro-optical conversion unit, the output end of the first electro-optical conversion unit is connected to the input end of the first photoelectric conversion unit through an optical fiber, the input end of the first electro-optical conversion unit is connected to the first signal output end of the controller through a wire, the output end of the second electro-optical conversion unit is connected to the input end of the second photoelectric conversion unit through an optical fiber, and the input end of the second electro-optical conversion unit is connected to the second signal output end of the controller through a wire.

[0063] In this embodiment, the first electro-optical conversion unit and the second electro-optical conversion unit are preferably, but not limited to, LED modules with optical fiber connectors, and the LED modules can be selected from existing products. The first photoelectric conversion unit and the second photoelectric conversion unit are preferably, but not limited to, photoelectric receiving modules with optical fiber connectors, and the photoelectric receiving modules can be selected from existing photodetectors.

[0064] In a preferred embodiment, the controller 10 , the electro-optical conversion module 16 and the radio frequency signal source 11 are arranged in an EMC control room 14 , and the photoelectric conversion module 15 is arranged in an anechoic chamber 13 .

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0066] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A system for testing electromagnetic interference immunity performance of vehicle-mounted fusion ADAS functions, characterized in that: It includes a radar target simulator, a video player and an EMS antenna arranged in the anechoic chamber, a controller and a radio frequency signal source outside the anechoic chamber, and a signal transmission module for realizing information transmission inside and outside the anechoic chamber; The vehicle under test in the anechoic chamber is provided with a millimeter-wave radar and an ADAS camera, wherein the millimeter-wave radar receives echo signals under different simulated working conditions emitted by a radar target simulator, and the ADAS camera of the vehicle under test collects road scene images played by a video player synchronized with the simulated working conditions of the echo signals; The signal transmission end of the controller is connected to the first signal transmission end of the signal transmission module, the second signal transmission end of the signal transmission module is connected to the signal transmission end of the video playback device, and the third signal transmission end of the signal transmission module is connected to the signal transmission end of the radar target simulator; The signal output end of the radio frequency signal source is connected to the wired end of the EMS antenna; The radar target simulator is located in front of the millimeter-wave radar of the vehicle under test, and the video playback device is located in front of the ADAS camera of the vehicle under test; It also includes a height adjustment platform, on which the radar target simulator is placed.

2. The system for electromagnetic interference immunity performance testing of vehicle-mounted fusion ADAS functions as claimed in claim 1, characterized in that: It also includes a millimeter wave absorption dark box arranged between the millimeter wave radar of the vehicle under test and the radar target simulator.

3. The system for electromagnetic interference immunity performance testing of vehicle-mounted fusion ADAS functions as claimed in claim 1, characterized in that: The radar target simulator is provided with an electromagnetic shielding device 1; And / or the video playback device is provided with a second electromagnetic shielding device.

4. The system for electromagnetic interference immunity performance testing of vehicle-mounted fusion ADAS functions as claimed in claim 1, characterized in that: The interference control terminal of the controller is connected to the control terminal of the radio frequency signal source.

5. The system for electromagnetic interference immunity performance testing of vehicle-mounted fusion ADAS functions as claimed in claim 1, characterized in that: It also includes an EMS power amplifier connected in series to a connection path between a signal output end of a radio frequency signal source and a wired end of an EMS antenna.

6. The system for electromagnetic interference immunity performance testing of vehicle-mounted fusion ADAS functions as claimed in claim 1, characterized in that: The signal transmission module includes a photoelectric conversion module and an electro-optical conversion module. The signal transmission end of the video playback device is connected to the first electrical signal connection end of the photoelectric conversion module, the signal transmission end of the radar target simulator is connected to the second electrical signal connection end of the photoelectric conversion module, the optical transmission end of the photoelectric conversion module is connected to the optical transmission end of the electro-optical conversion module, and the electrical signal connection end of the electro-optical conversion module is connected to the signal transmission end of the controller.

7. The system for electromagnetic interference immunity performance testing of vehicle-mounted fusion ADAS functions as claimed in claim 6, characterized in that: The controller, the electro-optical conversion module and the radio frequency signal source are arranged in the EMC control room, and the photoelectric conversion module is arranged in the radio wave darkroom.

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