CN110907739A - Electromagnetic anti-interference performance testing system and method for intelligent networked automobile - Google Patents
Electromagnetic anti-interference performance testing system and method for intelligent networked automobile Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention provides a system and a method for testing the electromagnetic disturbance rejection performance of an intelligent networking automobile. The networking system part respectively activates a vehicle-mounted V2X module and a navigation module through a communication comprehensive tester and a satellite signal generator, and a data collector collects vehicle networking system data; the intelligent system part simulates a road scene through a radar target simulator and a video playing device and respectively activates a vehicle-mounted millimeter wave radar and an ADAS camera; the test equipment for activating the intelligent network system needs to simulate the same road scene and synchronize in real time. According to the invention, the electromagnetic anti-interference performance test of the whole automobile is carried out in the anechoic chamber under the fusion scheme of the single-automobile intelligence and the Internet of vehicles, the electromagnetic compatibility problem of the system is found in the research and development stage of the intelligent Internet-connected automobile, the functional safety of the automobile is improved, and the automatic driving performance of the automobile is improved.
Description
Technical Field
The invention relates to the field of automobile electromagnetic compatibility testing, in particular to a system and a method for testing electromagnetic interference rejection performance of an intelligent networking automobile.
Background
The intelligent internet automobile is a carrier of unmanned technology, unmanned driving is to be realized, and the integration of single-automobile intelligence and vehicle networking technology is the trend of the development of the unmanned technology, but no mass production automobile model with the integration of the intelligent internet exists at present.
Due to the development of intelligent networking of automobiles, the intelligent networking automobile carries tens of communication transmission modules, dozens of hundreds of sensors, hundreds of control units and kilometer-long cables, and the electromagnetic compatibility risk brought by the intelligent networking automobile is obvious. In addition, intelligent networked automobiles face a complex road electromagnetic environment. From an external electromagnetic disturbance source, with the development of industrial modernization, the number of various broadcasting stations, transformer substations, communication base stations and high-voltage wires is increased, the number of handheld transmitters in a vehicle is increased, the electromagnetic environment in the space is complicated, and the driving safety of the vehicle is possibly threatened by the complicated electromagnetic environment.
At present, the industry is focusing on developing a technology for fusing bicycle intelligence and car networking technologies, and more paying attention to the functional performance test. Because the intelligent networking automobile faces a higher electromagnetic interference risk, the electromagnetic interference resistance performance test of the intelligent networking automobile is imperative.
The existing technical scheme is mostly a functional performance test and electromagnetic anti-interference test scheme aiming at a millimeter wave radar-based single-vehicle intelligent system, and a channel interference test scheme aiming at an intelligent network connection vehicle is not provided. For example, in patent publication No. CN107003398B entitled "test method for vehicle safety radar system using virtual radar signature", a radar target simulator is mainly used to generate a radar echo signal for testing and evaluating only the function and performance of an on-vehicle millimeter-wave radar.
The patent application with the publication number of CN110208758A and the name of 'a millimeter wave radar testing system and method for vehicles' is mainly a method for testing the electromagnetic anti-interference performance of a vehicle-mounted millimeter wave radar in a microwave darkroom, and a test object is only an ADAS system based on the vehicle-mounted millimeter wave radar.
The prior art can not realize the working condition simulation of the whole intelligent network system and the external electromagnetic disturbance test of the whole intelligent network system in a anechoic chamber, and can not realize the test and the evaluation of the electromagnetic interference resistance of the intelligent network system.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a system and a method for testing the electromagnetic immunity of an intelligent networking automobile. The problem of can't realize whole car intelligence networking system operating mode simulation and carry out outside electromagnetism disturbance to it in the anechoic chamber at present is solved.
In order to achieve the above object, the present invention provides an electromagnetic immunity performance testing system for an intelligent networked automobile, which includes a networking system part; or comprises a networking system part, an intelligent system part and/or an electromagnetic disturbance part; the networking system part comprises a communication comprehensive tester and/or a satellite signal generator which are arranged outside the anechoic chamber and have different independent working frequency bands, wherein the first signal ends of the communication comprehensive tester and the satellite signal generator are respectively connected with corresponding ports of the controller, and the second signal ends of the communication comprehensive tester and the satellite signal generator are respectively connected with corresponding antennas in the anechoic chamber; the vehicle to be tested positioned in the anechoic chamber is provided with a network connection test terminal, the output end of the network connection test terminal is connected with the data acquisition unit outside the anechoic chamber, the signal output end of the data acquisition unit is connected with the controller, or the network connection test terminal is in wireless connection with the communication comprehensive tester through an antenna transmission signal.
According to the invention, the electromagnetic anti-interference performance test of the whole automobile is carried out in the anechoic chamber under the technical fusion scheme of single-automobile intelligence and the Internet of vehicles, so that the electromagnetic anti-interference problem of an intelligent Internet system can be timely found in the research and development stage of the intelligent Internet-connected automobile, the functional safety of the automobile is improved, the automatic driving functional quality of the automobile is improved, and the life and property safety of people are protected.
In a preferred embodiment of the present invention, the communication comprehensive tester is connected to its corresponding antenna through a first filter, and the satellite signal generator is connected to its corresponding antenna through a second filter.
The electromagnetic disturbance of other frequency bands is prevented from damaging the network connection testing equipment through antenna coupling.
In another preferred embodiment of the present invention, the intelligent system part comprises a radar target simulator and a video playing device which are arranged in a anechoic chamber; the millimeter wave radar and the ADAS camera are arranged on a tested vehicle in the anechoic chamber, the millimeter wave radar receives echo signals sent by the radar target simulator under different simulation working conditions, and the ADAS camera of the tested vehicle acquires road scene images which are played by the video playing equipment and are synchronous with the simulation working conditions of the echo signals; the radar target simulator, the video playing device, the ADAS camera and the millimeter wave radar are in two-way communication with the controller outside the anechoic chamber through the signal transmission module.
According to the invention, the radar target simulator and the video playing equipment are arranged in the anechoic chamber, so that the electromagnetic anti-interference test is more convenient and flexible; the system can perform electromagnetic anti-interference test on the whole vehicle ADAS system under various simulation working conditions when the vehicle-mounted millimeter wave radar and the camera are fused, so that the electromagnetic anti-interference test on the vehicle ADAS system is more in line with actual use conditions, the test result has reference and research values, the safety and stability problems of the ADAS system can be predicted in time, and the development and progress of the ADAS system are promoted.
In another preferred embodiment of the present invention, the signal transmission module includes an electrical-to-optical conversion module located in the anechoic chamber and a photoelectric conversion module located outside the anechoic chamber, and the electrical-to-optical conversion module and the photoelectric conversion module are connected by an optical fiber.
The invention converts the interactive signals of the video playing equipment, the radar target simulator and the controller into optical signals for transmission, and can effectively avoid the influence of electromagnetic interference signals in a anechoic chamber on the interactive signals.
In another preferred embodiment of the present invention, the electromagnetic disturbance portion includes a radio frequency signal source outside the anechoic chamber, a signal input end of the radio frequency signal source is connected to the controller, a signal output end of the radio frequency signal source is connected to the EMS power amplifier, and an output end of the EMS power amplifier is connected to the EMS antenna inside the anechoic chamber. And the application of system electromagnetic disturbance is realized.
In order to achieve the above object, the present invention further provides an electromagnetic disturbance rejection performance testing method for an intelligent networked automobile, which includes the steps of:
the radar target simulator only generates radar echoes of the simulation target, the radar echoes do not include channel interference, and the vehicle-mounted millimeter wave radar is activated by the radar target simulator;
the communication comprehensive tester and the satellite signal simulator simulate a V2X signal and a satellite signal, and channel interference is not included in the V2X signal and the satellite signal;
the radar target simulator, the video playing device, the communication comprehensive tester and the satellite signal generator are used for synchronously simulating a traffic scene by the controller, activating the intelligent networking function of the automobile and carrying out electromagnetic immunity test.
The electromagnetic disturbance rejection performance testing method for the intelligent networked automobile realizes the working condition simulation of the intelligent networked system of the whole automobile in a anechoic chamber and tests the external electromagnetic disturbance of the intelligent networked system.
In a preferred embodiment of the present invention, the method comprises the following steps:
the method comprises the steps that a radar target simulator generates radar echo of a simulation target, the radar echo comprises channel interference, and a vehicle-mounted millimeter wave radar is activated by the radar target simulator;
the video playing device is used for playing a simulated road traffic scene and activating the vehicle-mounted ADAS camera;
the communication comprehensive tester and the satellite signal simulator simulate a V2X signal and a satellite signal, the communication signal generated by the communication comprehensive tester comprises channel interference, and the satellite signal generated by the satellite signal generator comprises the channel interference;
the radar target simulator, the video playing device, the communication comprehensive tester and the satellite signal generator are used for synchronously simulating a traffic scene by the controller, activating the intelligent networking function of the automobile and carrying out electromagnetic immunity test and channel interference test.
Therefore, the combined test of the electromagnetic immunity test and the channel anti-interference test is realized.
In a preferred embodiment of the invention, the method comprises the steps of creating channel interference:
acquiring radar echo signals corresponding to a plurality of simulated environment targets under different real scenes as radar echoes containing channel interference;
acquiring V2X signals of different road scenes and different real scenes corresponding to a plurality of simulated environment targets as communication signals containing channel interference;
and acquiring satellite signals of different real scenes corresponding to different road scenes as satellite signals containing channel interference.
Thereby acquiring channel interference of different signals.
The intelligent networking function is activated in the anechoic chamber, and external electromagnetic disturbance and channel disturbance simulation tests are performed on the intelligent networking function so as to verify and improve the electromagnetic disturbance rejection performance of the intelligent networking automobile.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a system layout in a preferred embodiment of the present invention;
fig. 2 is a schematic diagram of a system layout in another preferred embodiment of the present invention.
Reference numerals:
2 an ADAS camera; 3, video playing equipment; 4 EMS antenna; 5 millimeter wave radar; 6 millimeter wave absorption dark box; 7 radar target simulator; 8, a height adjusting table; 9V 2X communication terminal; a 10V 2X communications antenna; 11 satellite transmitting antenna.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The invention discloses an electromagnetic interference rejection performance test system for an intelligent networking automobile, which comprises a networking system part; or a networking system part and at least one of an intelligent system part and an electromagnetic disturbance part. Namely, the network connection system comprises a network connection system part, or comprises a network connection part and an intelligent system part, or comprises a network connection part and an electromagnetic disturbance part, or comprises a network connection part, an electromagnetic disturbance part and an intelligent system part.
As shown in fig. 1 and 2, the networking system part includes communication synthesizers and/or satellite signal generators with different independent operating frequency bands, which are arranged outside the anechoic chamber. The first signal end of the satellite signal generator is connected with the controller in a bidirectional mode, and the first signal end of the satellite signal generator is connected with the corresponding port of the controller in a unidirectional or bidirectional mode. The second signal end of the communication comprehensive instrument is connected with the V2X communication antenna 10 in the anechoic chamber, specifically, the second signal end of the communication comprehensive instrument is bidirectionally connected with the V2X communication antenna 10 in the anechoic chamber, and the second signal end of the satellite signal generator is unidirectionally connected with the satellite transmitting antenna 11 in the anechoic chamber.
The vehicle to be tested positioned in the anechoic chamber is provided with a network connection test terminal (such as a vehicle-mounted V2X communication terminal 9 and/or a navigation module), the output end of the network connection test terminal is connected with a data collector outside the anechoic chamber, and the signal output end of the data collector is connected with the controller. The specific networking system part respectively activates a vehicle-mounted communication module (such as a V2X module) and a navigation module through a communication comprehensive tester and a satellite signal generator, and a data acquisition unit acquires data of the vehicle networking system.
In another preferred embodiment, the networking test terminal can also realize wireless connection with the communication comprehensive tester by transmitting signals through the antenna 10.
In this embodiment, a band-pass filter of each working frequency band needs to be inserted between the communication integrated instrument, the satellite signal generator and the corresponding antenna, so as to prevent electromagnetic disturbance of other frequency bands from damaging the communication integrated instrument by coupling the antenna with the network connection device, that is, the communication integrated instrument shown in fig. 1 is connected with the corresponding antenna through the first filter, and the satellite signal generator is connected with the corresponding antenna through the second filter.
In the present embodiment, the intelligent system portion includes a radar target simulator 7, a video playback device 3, which are provided in a anechoic chamber; the millimeter wave radar 5 and the ADAS camera 2 are arranged on a tested vehicle in the anechoic chamber, the millimeter wave radar 5 receives echo signals sent by the radar target simulator under different simulation working conditions, and the ADAS camera 2 of the tested vehicle collects road scene images which are played by video playing equipment and are synchronous with the simulation working conditions of the echo signals; the radar target simulator 7, the video playing device 3, the ADAS camera 2 and the millimeter wave radar 5 are all in two-way communication with the controller outside the anechoic chamber through signal transmission modules. The intelligent system part simulates a road scene through a radar target simulator and a video playing device, and respectively activates a vehicle-mounted millimeter wave radar and an ADAS camera.
The signal transmission module comprises an electro-optical conversion module positioned in the anechoic chamber and a photoelectric conversion module positioned outside the anechoic chamber, and the electro-optical conversion module and the photoelectric conversion module are connected through optical fibers.
The electromagnetic disturbance part comprises a radio frequency signal source outside the anechoic chamber, the signal input end of the radio frequency signal source is connected with the controller, the signal output end of the radio frequency signal source is connected with the EMS power amplifier, and the output end of the EMS power amplifier is connected with the EMS antenna inside the anechoic chamber.
In this embodiment, as shown in fig. 1, a millimeter wave radar 5 and an ADAS camera 2 are arranged on a vehicle to be tested located in a anechoic chamber, the millimeter wave radar 5 receives echo signals sent by a radar target simulator 7 under different simulation conditions, and the ADAS camera 2 of the vehicle to be tested collects road scene images which are played by a video playing device and are synchronous with the simulation conditions of the echo signals.
The signal transmission end of the controller is connected with the first signal transmission end of the signal transmission module, the second signal transmission end of the signal transmission module is connected with the signal transmission end of the video playing device 3, the third signal transmission end of the signal transmission module is connected with the signal transmission end of the radar target simulator 7, and the fourth signal transmission end of the signal transmission module is connected with the signal transmission end of the millimeter wave radar 5.
The signal output end of the radio frequency signal source is connected with the wired end of the EMS antenna 4.
In this embodiment, the video playing device is preferably, but not limited to, an electronic display screen.
In this embodiment, the simulated operating condition refers to various application scenarios of an ACC (adaptive cruise Control) system, an FCW (forward collision warning) system, and an AEB (automatic emergency braking) system in the actual driving process of the automobile, such as an ACC acceleration following, an ACC constant-speed following, an ACC deceleration following, an FCW system triggered by the emergency approach of the front automobile, an AEB system triggered by the emergency approach of the front automobile, and the like.
In this embodiment, the controller is configured to transmit a control signal to the video playback device 3, the radar target simulator 7, the communication comprehensive tester, and the satellite signal generator, so as to implement parameter setting and synchronization control of the test device. For example, the controller transmits radar echo signal setting parameters and video playing files which are synchronous in simulation working conditions to the video playing device 3 and the radar target simulator 7; transmitting a communication signal or a transmission mode selection signal to the communication comprehensive tester; the controller also transmits a satellite signal or a transmission mode selection signal to the satellite signal generator. In the present embodiment, the controller is preferably, but not limited to, a PC computer, a notebook computer, or the like. Preferably, the memory (for example, a hard disk) inside the controller may be sequentially stored with the echo signal, the radar echo interference, the communication interference and the satellite interference related parameters or the execution file of each simulated condition, and the synchronized video playing file, so that in the electromagnetic interference test, the controller may output the echo signal related parameters or the execution file synchronously simulated conditions, and the V2X communication signal and the satellite signal, respectively, or output the interference synchronously.
In this embodiment, after the electromagnetic anti-interference test is completed, the worker reads information generated by the ADAS system in the test process and data acquired by the data acquisition unit and performs subsequent result analysis, and may also acquire feedback information through the antenna and the test equipment to perform subsequent result analysis.
In a preferred embodiment, the radar target simulator 7 is located in front of the millimeter wave radar 5 of the vehicle to be detected, and further preferably, the radar target simulator 7 is located in front of the millimeter wave radar 5 of the vehicle to be detected by 1-2 meters, and the laser aligner in the radar target simulator 7 needs to be aligned with the millimeter wave radar 5 to be detected.
In a preferred embodiment, the video playing device is located in front of the ADAS camera 2 of the vehicle to be tested, and performs conventional calibration on the video image before the electromagnetic interference resistance test, and further preferably, the video image played by the video playing device is entirely located within the field of view of the ADAS camera 2.
In the present embodiment, the anechoic chamber is a closed room, all the peripheries of the room are provided with shielding layers, and the inner wall of the room is provided with a sawtooth-shaped wave-absorbing material as shown in fig. 1.
In this embodiment, preferably, the radio frequency interference control end of the controller is connected to the control end of the radio frequency signal source; preferably, the rf signal source is, but not limited to, an rf comprehensive tester, which can be connected to and communicate with the controller through an equipment interface and a cable.
In the present embodiment, the wired end of the EMS antenna 4 is preferably, but not limited to, connected to the output end of the radio frequency signal through a low-loss dedicated radio frequency cable with a shielding function, and a through hole for the radio frequency cable to pass through is formed in the anechoic chamber.
In a preferred embodiment, the system further comprises a millimeter wave absorption dark box 6 arranged between the millimeter wave radar 5 and the radar target simulator 7 of the detected vehicle; and/or further comprises a height adjusting stage 8, and the radar target simulator 7 is placed on the height adjusting stage 8.
In the present embodiment, the millimeter wave absorbing dark box 6 is preferably, but not limited to, made of a plate-shaped or box-shaped wave absorbing material with a through hole in the middle, which enables an interference-free communication space channel between the millimeter wave radar 5 and the radar target simulator 7.
In a preferred embodiment, the radar target simulator 7 is provided with a first electromagnetic shielding means; and/or the video playing device is provided with a second electromagnetic shielding device. In this embodiment, the electromagnetic shielding device is preferably, but not limited to, a metal shielding cover or a metal shielding net or a shielding material adhesion layer disposed outside the radar target simulator 7, and a hole for outputting the echo signal is reserved in the metal shielding cover or the metal shielding net or the shielding material adhesion layer; the second electromagnetic shielding device is preferably but not limited to a metal shielding cover or a metal shielding mesh or a shielding material adhesion layer arranged outside the video playing device, and a hole for displaying the video image is reserved on the metal shielding cover or the metal shielding mesh or the shielding material adhesion layer. In a preferred embodiment, the system further comprises an EMS power amplifier connected in series with the connection path between the signal output end of the video signal source and the wired end of the EMS antenna 4.
In the present embodiment, the electromagnetic interference applying method can refer to the standards ISO 11451-2 and ISO 11451-3, and the electrostatic discharge immunity refers to the standard GB/T19951, which are not described herein again.
In this embodiment, preferably, when the video playing device 3 is an electronic display screen, the electronic display screen is placed right 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 on the same straight line; further preferred, still including supporting electronic display screen and adjusting the supporting mechanism of electronic display screen position, supporting mechanism includes the base, locates a plurality of gyro wheels of base lower extreme, locates at least one montant of base upper end telescopic, is equipped with the video playback device installation department on the montant. The roller is preferably a universal wheel, can drive the electronic display screen to move in the anechoic chamber to adjust the plane position of the electronic display screen in the anechoic chamber, and can adjust the height of the electronic display screen through the extension and retraction of the vertical rod. The video playing device mounting part is preferably but not limited to an existing snap structure or a hook. In a preferred embodiment, the signal transmission module includes a photoelectric conversion module and an electro-optical conversion module, the signal transmission end of the video playback device 3 is connected to the first electrical signal connection end of the photoelectric conversion module, the signal transmission end of the radar target simulator 7 is connected to the second electrical signal connection end of the photoelectric conversion module, and the signal transmission end of the millimeter wave radar 5 is connected to the third electrical signal connection end of the photoelectric conversion module. The optical transmission end of the photoelectric conversion module is connected with the optical transmission end of the photoelectric conversion module, and the electrical signal connection end of the photoelectric conversion module is connected with the signal transmission end of the controller.
In the present embodiment, the optical transmission end of the photoelectric conversion module and the optical transmission end of the electro-optical conversion module are preferably connected by an optical fiber, so that interference-free signal propagation over a long distance can be realized.
In an application scenario of this embodiment, the photoelectric conversion module includes a first photoelectric conversion unit, a second photoelectric conversion unit, and a third photoelectric conversion unit, an output end of the first photoelectric conversion unit is connected to a signal input end of the video playback device through a wire, an output end of the second photoelectric conversion unit is connected to a signal input end of the radar target simulator 7 through a wire, and an output end of the third photoelectric conversion unit is connected to a signal input end of the millimeter wave radar 5 through a wire. The electro-optical conversion module comprises a first electro-optical conversion unit, a second electro-optical conversion unit and a third electro-optical conversion unit, wherein the output end of the first electro-optical conversion unit is connected with the input end of the first photoelectric conversion unit through an optical fiber, and the input end of the first electro-optical conversion unit is connected with the first signal output end of the controller through a wire; the output end of the second electro-optical conversion unit is connected with 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 with the second signal output end of the controller through a wire; the output end of the third electro-optical conversion unit is connected with the input end of the third photoelectric conversion unit through an optical fiber, and the input end of the third electro-optical conversion unit is connected with the third signal output end of the controller through a wire.
In this embodiment, the electro-optical conversion unit is preferably, but not limited to, an LED (light emitting diode) module with an optical fiber connector or a laser diode module, and the LED module or the laser diode module may be an existing product. The photoelectric conversion unit is preferably but not limited to a photoelectric receiving module with an optical fiber connector, and the photoelectric receiving module can select an existing photoelectric detector.
In a preferred embodiment, the controller, the electro-optical conversion module, the communication comprehensive tester, the satellite signal generator, the filter, the data collector and the radio frequency signal source are arranged in an EMC control room, and the electro-optical conversion module is arranged in an anechoic chamber.
The invention also provides an electromagnetic disturbance rejection performance testing method for the intelligent networked automobile, which can utilize the system shown in figure 1 and comprises the following steps of:
the radar target simulator only generates radar echoes of the simulation target, the radar echoes do not include channel interference, and the vehicle-mounted millimeter wave radar is activated by the radar target simulator;
the video playing device is used for playing a simulated road traffic scene and activating the vehicle-mounted ADAS camera;
the communication comprehensive tester and the satellite signal simulator simulate a V2X signal and a satellite signal, and channel interference is not included in the V2X signal and the satellite signal;
the radar target simulator, the video playing device, the communication comprehensive tester and the satellite signal generator are used for synchronously simulating a road traffic scene by the controller, activating the intelligent networking function of the automobile, applying an electromagnetic interference signal and carrying out an electromagnetic immunity test.
In a further embodiment, the radar target simulator generates a radar echo of the simulation target, which radar echo contains channel disturbances, with which the on-board millimeter wave radar is activated. The video playing device is used for playing a simulated road traffic scene and activating the vehicle-mounted ADAS camera. One or both of the communication comprehensive tester and the satellite signal simulator simulate V2X signals and satellite signals, the communication signals generated by the communication comprehensive tester contain channel interference, and the satellite signals generated by the satellite signal generator contain channel interference. The radar target simulator, the video playing device, the communication comprehensive tester and the satellite signal generator are synchronously used for road traffic scene simulation by the controller, activating the intelligent network connection function of the automobile and carrying out channel interference test.
The invention also provides an electromagnetic interference rejection performance testing method for the intelligent networked automobile, which can utilize the system shown in figure 1 and comprises the following testing steps:
the method comprises the steps that a radar target simulator generates radar echo of a simulation target, the radar echo comprises channel interference, and a vehicle-mounted millimeter wave radar is activated by the radar target simulator;
the video playing device is used for playing a simulated road traffic scene and activating the vehicle-mounted ADAS camera;
the communication comprehensive tester and the satellite signal simulator simulate a V2X signal and a satellite signal, the communication signal generated by the communication comprehensive tester contains channel interference, and the satellite signal generated by the satellite signal generator contains channel interference.
The radar target simulator, the video playing device, the communication comprehensive tester and the satellite signal generator are used for synchronously simulating a road traffic scene by the controller, activating the intelligent networking function of the automobile and applying electromagnetic interference to carry out electromagnetic immunity test and channel interference test. The radar target simulator, the video playing device, the communication comprehensive tester and the satellite signal generator need to simulate the same road scene and synchronize in real time. The electromagnetic immunity test can be carried out according to an external radiation source method, a vehicle-mounted transmitter simulation method and electrostatic discharge.
In this embodiment, the method further includes the step of creating a broadcast source and channel interference, specifically:
the radar echo signals under different real scenes corresponding to a plurality of simulated environment targets are obtained and serve as radar echoes containing channel interference, for example, the radar signals under different real weather conditions are obtained and serve as the radar echo signals, radar simulation of weather channels such as rain, snow, fog and haze can be generated specifically, and the radar target simulator is used for activating the vehicle-mounted millimeter wave radar.
The method comprises the steps of obtaining video signals of different road scenes and different real scenes corresponding to a plurality of simulated environment targets as a playing source of video playing equipment, wherein the video playing equipment is used for playing simulated road traffic scenes and activating a vehicle-mounted ADAS camera.
The method comprises the steps of obtaining V2X signals of different road scenes and different real scenes corresponding to a plurality of simulated environment targets as communication signals containing channel interference, wherein a V2X target simulation module is arranged in a communication comprehensive instrument and is mainly used for simulating vehicles or signal lamps in different traffic scenes to realize a direct connection PC5 communication mode, and the communication comprehensive instrument can perform V2V (vehicle-to-vehicle), V2I (vehicle-to-infrastructure) or V2P (vehicle-to-human) information interaction with a tested vehicle. In addition, the communication comprehensive tester can also perform direct-connection communication channel simulation, mainly referring to the effects of multipath, shielding, Doppler frequency shift, channel attenuation and the like caused by different road scenes and weather environments. Specifically, V2X signals of different road scenes and different real scenes corresponding to a plurality of simulated environmental targets can be acquired as communication signals containing channel interference.
And acquiring satellite signals of different real scenes corresponding to different road scenes as satellite signals containing channel interference. In the present embodiment, the satellite signal generator can not only simulate the satellite signal and transmit the positioning information and time service to the vehicle, but also simulate the satellite signal channel, such as multipath and occlusion. The data acquisition instrument is used for acquiring vehicle state data.
In the step of creating the playing source and the channel interference of the radar target simulator, the video playing device, the communication comprehensive tester and the satellite signal generator, at least one corresponding preset or field generated radar echo, road traffic scene video, V2X signal and satellite signal are all in the same traffic scene.
In the embodiment, the networking system part, the intelligent system part and the electromagnetic disturbance part synchronously apply signals. During specific testing, different information corresponding to the same traffic scene is generated by the radar target simulator, the video playing device, the communication comprehensive tester and the satellite signal generator in a working simulation mode, and simulated scene parameters among all the devices are synchronized in real time. In this embodiment, the method further comprises the step of applying electromagnetic disturbance: electromagnetic disturbance is applied by external radiation to the vehicle or by a radio frequency source replaying a disturbance source collected in the road. For example, the electromagnetic interference source is realized by a controller, a radio frequency source, an EMS power amplifier and an EMS transmitting antenna, and the electromagnetic interference sources radiated by the electromagnetic interference source are divided into two types: firstly, performing electromagnetic immunity test of a vehicle by using a vehicle external radiation source; and the second method is that a radio frequency source plays back a disturbance source collected in a road, and an electromagnetic immunity test is carried out on the vehicle according to a collected electromagnetic disturbance mode. Or by means of an electrostatic discharge simulator, electrostatic gun.
In the embodiment, the radar target simulator and the electronic display screen can resist the electromagnetic disturbance. The intelligent networking traffic scene simulated by the test system realizes the time synchronization of the single-vehicle intelligent simulation equipment and the vehicle networking simulation equipment. When the electromagnetic disturbance test is carried out, the same frequency disturbance exemption is needed to be carried out, and the electromagnetic disturbance is prevented from being coupled into the equipment through the internet antenna and causing damage to the equipment. In addition, the test system may also include monitoring equipment, such as an EMC monitoring camera, an EMC monitoring microphone, a CAN bus monitoring equipment, an ethernet signal monitoring equipment, and the like.
According to the invention, the electromagnetic anti-interference performance test of the whole automobile is carried out in the anechoic chamber under the fusion scheme of the single-automobile intelligence and the Internet of vehicles, the electromagnetic compatibility problem of the system is found in the research and development stage of the intelligent Internet-connected automobile, the functional safety of the automobile is improved, and the automatic driving performance of the automobile is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. An electromagnetic interference rejection performance test system for an intelligent networking automobile is characterized by comprising a networking system part; or comprises a networking system part and at least one of an intelligent system part and an electromagnetic disturbance part;
the networking system part comprises a communication comprehensive tester and/or a satellite signal generator which are arranged outside the anechoic chamber and have different independent working frequency bands, the first signal ends of the communication comprehensive tester and the satellite signal generator are respectively connected with the controller, and the second signal ends of the communication comprehensive tester and the satellite signal generator are respectively connected with corresponding antennas in the anechoic chamber; a network connection test terminal is arranged on a tested vehicle positioned in the anechoic chamber;
the output end of the network connection test terminal is connected with a data collector outside the anechoic chamber, or the network connection test terminal is wirelessly connected with the communication comprehensive tester by transmitting signals through an antenna.
2. The electromagnetic immunity performance test system for intelligent networked automobile of claim 1, wherein the communication comprehensive tester is connected with its corresponding antenna through a first filter, and the satellite signal generator is connected with its corresponding antenna through a second filter.
3. The electromagnetic immunity performance test system for intelligent networked automobile of claim 1, wherein said intelligent system portion comprises:
the radar target simulator and the video playing device are arranged in the anechoic chamber; and
the system comprises a millimeter wave radar and an ADAS camera which are arranged on a tested vehicle in a anechoic chamber, wherein the millimeter wave radar receives echo signals sent by a radar target simulator under different simulation working conditions, and the ADAS camera of the tested vehicle acquires road scene images which are played by a video playing device and are synchronous with the simulation working conditions of the echo signals;
the radar target simulator, the video playing device, the ADAS camera and the millimeter wave radar are in two-way communication with the controller outside the anechoic chamber through the signal transmission module.
4. The electromagnetic immunity performance test system for intelligent networked automobiles as claimed in claim 3, wherein said signal transmission module comprises an electro-optical conversion module located in the anechoic chamber and a photoelectric conversion module located outside the anechoic chamber, said electro-optical conversion module and said photoelectric conversion module being connected by optical fiber.
5. The electromagnetic disturbance rejection performance test system for the intelligent networked automobile according to claim 1, wherein the electromagnetic disturbance part comprises a radio frequency signal source outside the anechoic chamber, a signal input end of the radio frequency signal source is connected with the controller, a signal output end of the radio frequency signal source is connected with the EMS power amplifier, and an output end of the EMS power amplifier is connected with the EMS antenna inside the anechoic chamber.
6. An electromagnetic disturbance rejection performance testing method for an intelligent networked automobile is characterized by comprising the following steps of:
the radar target simulator only generates radar echoes of the simulation target, the radar echoes do not include channel interference, and the vehicle-mounted millimeter wave radar is activated by the radar target simulator;
the video playing device is used for playing a simulated road traffic scene and activating the vehicle-mounted ADAS camera;
the communication comprehensive tester and the satellite signal simulator simulate a V2X signal and a satellite signal, and channel interference is not included in the V2X signal and the satellite signal;
the radar target simulator, the video playing device, the communication comprehensive tester and the satellite signal generator are used for synchronously simulating a traffic scene by the controller, activating the intelligent networking function of the automobile and carrying out electromagnetic immunity test.
7. The electromagnetic interference rejection performance testing method for the intelligent networked automobile is characterized by comprising a channel interference rejection step, and specifically comprises the following steps:
the method comprises the steps that a radar target simulator generates radar echo of a simulation target, the radar echo comprises channel interference, and a vehicle-mounted millimeter wave radar is activated by the radar target simulator;
the video playing device is used for playing a simulated road traffic scene and activating the vehicle-mounted ADAS camera;
the communication comprehensive tester and the satellite signal simulator simulate a V2X signal and a satellite signal, the communication signal generated by the communication comprehensive tester comprises channel interference, and the satellite signal generated by the satellite signal generator comprises the channel interference;
the radar target simulator, the video playing device, the communication comprehensive tester and the satellite signal generator are used for synchronously simulating a traffic scene by the controller, activating the intelligent networking function of the automobile and carrying out electromagnetic immunity test and channel interference test.
8. The test method of claim 7, comprising the step of creating channel interference:
acquiring radar echo signals corresponding to a plurality of simulated environment targets under different real scenes as radar echoes containing channel interference;
acquiring V2X signals of different road scenes and different real scenes corresponding to a plurality of simulated environment targets as communication signals containing channel interference;
and acquiring satellite signals of different real scenes corresponding to different road scenes as satellite signals containing channel interference.
9. The test method according to one of claims 5 to 7, further comprising the step of applying an electromagnetic disturbance:
electromagnetic disturbance is applied by external radiation to the vehicle or by a radio frequency source replaying a disturbance source collected in the road.
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