Electromagnetic compatibility test method, system and device of brake-by-wire function and medium

Abstract

The invention discloses an electromagnetic compatibility test method, system and device of a brake-by-wire function and a medium, and relates to the technical field of electromagnetic compatibility test.The method comprises the steps that a brake simulation device is controlled to apply pressure to a brake pedal of a test vehicle, and a brake signal is generated; first braking response information and first pressure information are obtained; controlling an electromagnetic interference generating device to emit electromagnetic waves to the test vehicle so as to generate electromagnetic interference on the test vehicle; second braking response information and second pressure information are obtained; and according to the first brake response information, the second brake response information, the first pressure information and the second pressure information, electromagnetic compatibility test analysis is carried out on the brake system of the test vehicle, and a test result is obtained. According to the scheme, the working conditions of the braking system in the normal state and the electromagnetic interference state can be comprehensively reflected, and the performance of the braking system in the electromagnetic interference environment can be accurately evaluated.

Description

Technical Field

[0001] The present invention generally relates to the technical field of electromagnetic compatibility testing, and particularly relates to an electromagnetic compatibility testing method, system, device and medium for a wire control braking function. Background Art

[0002] With the continuous development of the electronic degree of automobiles and the integration of automobile systems, as one of the key safety components in vehicles, the wire control braking system can be closely integrated with the autonomous driving system due to its advantages of higher response speed, better adjustability and integration, so as to achieve efficient braking control of the vehicle. Among them, as the development direction of the future automobile braking system, compared with the traditional braking method, the core of the wire control braking system is to replace the traditional mechanical or hydraulic transmission mechanism with an electronic signal to achieve the braking function, which greatly improves the safety and comfort of the vehicle.

[0003] At present, the wire control braking system in a vehicle operates relying on electronic signals, which may be interfered by various interference sources, such as radio wave transmission towers, high-voltage lines, etc., resulting in abnormal braking functions or even complete failures, thus affecting safe driving. Therefore, how to conduct electromagnetic compatibility testing on the wire control braking system of a vehicle is an urgent problem to be solved. Summary of the Invention

[0004] In view of the above defects or deficiencies in the prior art, it is expected to provide an electromagnetic compatibility testing method, system, device and medium for a wire control braking function, which can comprehensively reflect the working conditions of the braking system in the normal state and under the electromagnetic interference state, and is convenient for accurately evaluating the performance of the braking system in the electromagnetic interference environment.

[0005] In a first aspect, the present invention provides an electromagnetic compatibility testing method for a wire control braking function, and the method includes: Controlling a braking simulation device to apply pressure to the brake pedal of a test vehicle to generate a braking signal; Obtaining first braking response information and first pressure information; the first braking response information is determined after the brake controller controls the brake execution component to perform a braking operation according to the braking signal when no electromagnetic interference is applied, and the first pressure information is obtained by detecting the pressure of the brake execution component when no electromagnetic interference is applied; Controlling an electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle; Obtaining second braking response information and second pressure information; the second braking response information is determined after the brake controller controls the brake execution component to perform a braking operation according to the braking signal after the electromagnetic interference is applied, and the second pressure information is obtained by detecting the pressure of the brake execution component after the electromagnetic interference is applied; Based on the first braking response information, the second braking response information, the first pressure information, and the second pressure information, perform electromagnetic compatibility test analysis on the braking system of the test vehicle to obtain the test results.

[0006] In one embodiment, obtaining the second braking response information and the second pressure information includes: Controlling the braking simulation device to apply the pressure to the brake pedal to generate the braking signal, so that the brake pedal sends the braking signal to the brake controller; After the brake controller controls the brake execution component to perform a braking operation according to the braking signal, record the second braking response information, and perform a pressure detection on the brake execution component to obtain the second pressure information.

[0007] In one embodiment, the braking simulation device includes: a cylinder; controlling the braking simulation device to apply the pressure to the brake pedal to generate the braking signal includes: Determine the movement stroke of the cylinder according to the pressure; Control the cylinder to perform an elongation action according to the movement stroke to apply the pressure to the brake pedal to generate the braking signal.

[0008] In one embodiment, based on the first braking response information, the second braking response information, the first pressure information, and the second pressure information, perform electromagnetic compatibility test analysis on the braking system of the test vehicle to obtain the test results, including: Judge whether the test vehicle has abnormal braking response according to the first braking response information and the second braking response information; and judge whether the test vehicle has abnormal braking according to the first pressure information and the second pressure information; When the test vehicle does not have abnormal braking response and does not have abnormal braking, determine that the test result is a pass; When the test vehicle has abnormal braking response, and / or, the test vehicle has abnormal braking, determine that the test result is a failure.

[0009] In one embodiment, judge whether the test vehicle has abnormal braking response according to the first braking response information and the second braking response information; and judge whether the test vehicle has abnormal braking according to the first pressure information and the second pressure information, including: When the first braking response information and the second braking response information are different, determine that the test vehicle has abnormal braking response; when the first braking response information and the second braking response information are the same, determine that the test vehicle does not have abnormal braking response; When the first pressure information is different from the second pressure information, it is determined that the test vehicle has a braking abnormality. When the first pressure information is the same as the second pressure information, it is determined that the test vehicle does not have a braking abnormality.

[0010] In one embodiment, the electromagnetic interference generating device includes: a reverberation chamber and a shielding chamber. The reverberation chamber includes a transmitting antenna and a tuner. The shielding chamber includes: a signal generator, a power amplifier, and a directional coupler; Controlling the electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle includes: Obtain test configuration parameters; the test configuration parameters include: test frequency, test level, stirring method, reference point, antenna polarization method, scanning step, modulation method, dwell time; the test frequency includes multiple test frequency bands; According to the test configuration parameters, control the signal generator, power amplifier, transmitting antenna, and tuner to perform parameter configuration; Control the signal generator that has completed parameter configuration to generate an initial radio frequency signal, and control the power amplifier that has completed parameter configuration to amplify the initial radio frequency signal; Control the directional coupler that has completed parameter configuration to couple the amplified radio frequency signal and transmit it to the reverberation chamber through the transmitting antenna that has completed parameter configuration; Control the tuner that has completed parameter configuration to tune the radio frequency signal in the reverberation chamber to generate electromagnetic interference to the test vehicle.

[0011] In a second aspect, the embodiment of the present application provides an electromagnetic compatibility test system for a brake-by-wire function. The system includes: a brake simulation device, a main control device, and an electromagnetic interference generating device; the main control device is respectively communicatively connected to the brake simulation device and the electromagnetic interference generating device; The main control device is configured to: control the braking simulation device to apply pressure to the brake pedal of the test vehicle to generate a braking signal; obtain first braking response information and first pressure information; control the electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle; obtain second braking response information and second pressure information; perform electromagnetic compatibility test analysis on the braking system of the test vehicle according to the first braking response information, the second braking response information, the first pressure information, and the second pressure information to obtain a test result; wherein, the first braking response information is determined by the brake controller according to the braking signal to control the brake execution component to perform a braking operation when no electromagnetic interference is applied, and the first pressure information is obtained by detecting the pressure on the brake execution component when no electromagnetic interference is applied; the second braking response information is determined by the brake controller according to the braking signal to control the brake execution component to perform a braking operation after electromagnetic interference is applied, and the second pressure information is obtained by detecting the pressure on the brake execution component after electromagnetic interference is applied; The electromagnetic interference generating device is configured to: emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle; The braking simulation device is configured to: apply pressure to the brake pedal of the test vehicle to generate a braking signal.

[0012] In a third aspect, an embodiment of the present application provides a main control device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the computer program to implement the method provided in the above embodiment.

[0013] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method provided in the above embodiment is implemented.

[0014] The electromagnetic compatibility test method, system, device and medium for the electronic brake control function provided by the embodiments of the present application. The method includes: controlling a brake simulation device to apply pressure to the brake pedal of a test vehicle to generate a brake signal, and obtaining first brake response information and first pressure information; controlling an electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle, and obtaining second brake response information and second pressure information; and performing electromagnetic compatibility test analysis on the brake system of the test vehicle according to the first brake response information, the second brake response information, the first pressure information and the second pressure information to obtain a test result. Compared with the prior art, this technical solution applies pressure to the brake pedal of the test vehicle through the brake simulation device, and can more realistically simulate the braking behavior of the brake pedal in the actual vehicle driving scenario, making the test environment closer to the real situation, ensuring the reliability and effectiveness of the test result, and obtaining the first brake response information and the first pressure information without interference, as well as the second brake response information and the second pressure information after interference. Thus, it can comprehensively reflect the working conditions of the brake system in the normal state and the state of being subjected to electromagnetic interference. By comparing and analyzing these information, the influence degree of electromagnetic interference on the brake system can be accurately evaluated, so as to accurately evaluate the performance of the brake system in the electromagnetic interference environment, and help to discover potential electromagnetic compatibility problems existing in the design and manufacturing process of the vehicle electronic brake control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 Schematic structural diagram of an electromagnetic compatibility test system for the electronic brake control function provided by an embodiment of the present application; Figure 2 Schematic structural diagram of an electromagnetic compatibility test system for the vehicle electronic brake control function provided by another embodiment of the present application; Figure 3 Schematic structural diagram of the layout details of an electromagnetic compatibility test system for the electronic brake control function provided by another embodiment of the present application; Figure 4 Schematic flowchart of an electromagnetic compatibility test method for the vehicle electronic brake control function provided by an embodiment of the present application; Figure 5 Schematic flowchart of an electromagnetic compatibility test method for the vehicle electronic brake control function provided by another embodiment of the present application; Figure 6 Schematic diagram of the relationship between the time axis, the cylinder stroke and the brake caliper pressure provided by an embodiment of the present application; Figure 7 Schematic structural diagram of a main control device provided by an embodiment of the present application; Description of Reference Numerals Braking simulation device-10; pedal simulation device-11; brake pedal-12; test harness-13; main control device-20; electromagnetic interference generating device-30; reverberation chamber-31; shielding chamber-32; support-33; transmitting antenna-311; tuner-312; radio frequency cable-313; signal generator-321; power amplifier-322; directional coupler-323; power probe-324; first wall panel connector-325; laboratory table-327; optical fiber-328; sample test area-329; second wall panel connector-330; test vehicle-40; braking controller-50; brake caliper-51; pressure sensor-52; power supply network-53; power supply-54. DETAILED DESCRIPTION

[0016] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0017] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] It is understandable that with the rapid development of autonomous driving technology, the vehicle's brake-by-wire system is very susceptible to electromagnetic interference, which can cause braking errors and affect safe driving. Therefore, how to conduct electromagnetic compatibility testing on the vehicle's brake-by-wire system is an urgent problem to be solved.

[0019] Based on the above-mentioned defects, the present application provides an electromagnetic compatibility testing method, system, device and medium for a wire control braking function. Compared with the prior art, the technical solution applies pressure to the brake pedal of the test vehicle through a braking simulation device, which can more realistically simulate the braking behavior of the brake pedal in the actual vehicle driving scenario, so that the test environment is close to the real situation, ensuring the reliability and effectiveness of the test results, and obtaining the first braking response information and the first pressure information when no interference is applied, as well as the second braking response information and the second pressure information after interference is applied, so as to comprehensively reflect the working conditions of the braking system in normal state and under electromagnetic interference state. By comparing and analyzing this information, the degree of influence of electromagnetic interference on the braking system can be accurately evaluated, so as to accurately evaluate the performance of the braking system in an electromagnetic interference environment, and help to discover potential electromagnetic compatibility problems in the design and manufacturing process of the vehicle wire control braking system.

[0020] See also Figure 1 As shown, Figure 1Schematic structural diagram of an electromagnetic compatibility test system for a by-wire braking function. The system includes: a braking simulation device 10, a main control device 20, and an electromagnetic interference generating device 30; the main control device 20 is respectively communicatively connected to the braking simulation device 10 and the electromagnetic interference generating device 30.

[0021] It should be noted that the above electromagnetic compatibility test system is used to conduct electromagnetic compatibility tests on the by-wire braking function of the test vehicle 40. Among them, the test vehicle 40 refers to a vehicle that needs to conduct electromagnetic compatibility tests on the by-wire braking function. The test vehicle 40 may include: a drive system, a braking system, a hands-off detection system, a by-wire steering system, etc. The braking system may, for example, be a by-wire braking system, and may include, for example, a braking controller and a braking execution module inside the test vehicle.

[0022] The above braking simulation device 10 is a device for simulating the braking of the brake pedal of the test vehicle 40. The braking simulation device 10 is used to apply pressure to the brake pedal of the test vehicle to generate a braking signal to drive the vehicle to perform a braking action.

[0023] The above electromagnetic interference generating device 30 is a device for generating interference to the test vehicle 40. The electromagnetic interference generating device 30 is used to: emit electromagnetic waves to the test vehicle 40 to generate electromagnetic interference to the test vehicle 40.

[0024] The above system may further include a braking controller 50. The braking controller 50 is respectively connected to the braking simulation device 10 and the main control device 20. The braking controller 50 is used to receive the braking signal of the braking simulation device 10, control the braking execution component to perform a braking operation, and is used to send pressure information to the main control device 20.

[0025] The above-mentioned main control device 20 has functions of data processing, receiving data, and sending data, and may include a server and a terminal that establishes a communication connection with the server. A test software may be installed inside the main control device 20, and this test software is used to generate control signals according to the requirements of test standards and send them to the electromagnetic interference generating device and the braking simulation device, so as to realize the test of the electromagnetic immunity of the electronic brake system. Optionally, the server may be a single server, or a server cluster or distributed system composed of several servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery network (CDN), and big data and artificial intelligence platforms. An operating system may run on the above-mentioned terminal, and this operating system may include, but is not limited to, Android system, IOS system, Linux system, Unix, Windows system, etc., and may also include a user interface (UI) layer, which can provide the display of data through the UI layer. In addition, data can be sent to the electromagnetic interference generating device 30 and the braking simulation device 10 based on the application programming interface (API), and is used to receive the data transmitted by the electromagnetic interference generating device 30 and the braking simulation device 10.

[0026] A microprocessor (MCU), memories (ROM, RAM), input / output interfaces (I / O), analog-to-digital converters (A / D), and large-scale integrated circuits such as shaping and driving circuits may be provided inside the server and the terminal.

[0027] In one embodiment, please refer to Figure 2 As shown, the above-mentioned electromagnetic interference generating device includes: a reverberation chamber 31 and a shielding chamber 32. The reverberation chamber 31 includes a transmitting antenna 311, a tuner 312, and a radio frequency cable 313. The shielding chamber 32 includes: a signal generator 321, a power amplifier 322, a directional coupler 323, a power probe 324, and a first wall plate connector 325. The power amplifier 322 is respectively connected to the signal generator 321 and the directional coupler 323. The directional coupler 323 is also connected to the power probe 324 and the first wall plate connector 325. The directional coupler 323 is connected to the transmitting antenna 311 through the first wall plate connector 325 and the radio frequency cable 313.

[0028] Specifically, the above-mentioned signal generator 321 is used to generate an initial radio frequency signal and send the initial radio frequency signal to the power amplifier 322, so that the power amplifier 322 amplifies the initial radio frequency signal to make it reach a sufficient power level to meet the power requirements for the electromagnetic interference test of the test vehicle. The directional coupler 323 has functions such as power distribution and detection, signal sampling, isolation and reverse power detection, and impedance matching. Here, it couples a part of the power output by the power amplifier to the power probe for power monitoring, while ensuring that most of the power is effectively transmitted to the transmitting antenna, and can prevent the reverse power from damaging devices such as the power amplifier. The power probe 324 is used to measure the power of the radio frequency signal, convert the received radio frequency power into a measurable electrical signal, so as to be displayed and recorded by relevant instruments, provide real-time power information for the operator, and ensure that the power during the test is controlled within an appropriate range. The first wall plate connector 325 serves as the interface between the shielded room and the reverberation chamber, realizing the electrical connection and signal transmission between the devices in the shielded room and the devices in the reverberation chamber, while ensuring the shielding function of the shielded room, preventing electromagnetic leakage, and ensuring the accuracy and reliability of the test environment.

[0029] The radio frequency cable 313 is used to transmit radio frequency signals, connect the relevant devices in the shielded room to the transmitting antenna in the reverberation chamber through the first wall plate connector, ensure that the radio frequency signal has low loss and interference during transmission, and ensure the quality and intensity of the signal. The transmitting antenna 311 is used to radiate the amplified radio frequency signal into the reverberation chamber in the form of electromagnetic waves, so as to form a uniform electromagnetic environment in the reverberation chamber for immunity tests and other electromagnetic compatibility tests on the test vehicle. The tuner 312 is used to adjust the resonant frequency of the reverberation chamber to make the reverberation chamber achieve the best reverberation effect within a specific frequency range, ensure the uniformity and stability of the indoor electromagnetic environment, and meet the requirements of different test frequencies.

[0030] The above-mentioned electromagnetic interference generating device further includes a second wall plate connector 330, an experimental table 327, and the main control device 20 is communicatively connected to the sample test area 329 through the second wall plate connector 330 and the optical fiber 328 in sequence. The sample test area 329 is located on the experimental table 327.

[0031] Before conducting the electromagnetic compatibility test on the electronic brake system of the test vehicle, it is necessary to arrange and build the electromagnetic compatibility test system on the experimental table according to the layout requirements. The experimental table is placed in the uniform field strength area of the reverberation chamber. The main control device can send control commands to the brake simulation device, so that the brake simulation device applies pressure to the brake pedal of the test vehicle to generate a brake signal. Among them, the above-mentioned brake simulation device includes a pedal simulation device, a brake pedal, and a test wire harness.

[0032] The electromagnetic compatibility test system for the above-mentioned electronic brake control function further includes: a brake controller and a brake execution component. The brake controller is respectively communicatively connected to the brake pedal and the brake execution component.

[0033] When pressure is applied to the brake pedal to generate a brake signal, the brake pedal sends the brake signal to the brake controller through the test harness. The brake controller converts it into a corresponding electrical signal and sends it to the brake execution component through the test harness, so that the brake execution component receives and responds to the electrical signal to perform a braking operation on the test vehicle.

[0034] Optionally, the above-mentioned brake execution component may include a brake caliper and a pressure sensor. The brake caliper performs a clamping action to output braking force, so that the test vehicle decelerates or stops.

[0035] Please refer to Figure 3 as shown in Figure 3 FIG. is a schematic structural diagram of the layout details for the electromagnetic compatibility test of the electronic brake control function of a test vehicle provided in another embodiment of the present application. The electromagnetic compatibility test system further includes: a support 33. The brake controller 50 is connected to the brake caliper 51, the power network 53, and the brake pedal 12 through the test harness 13. The brake pedal 12 is also connected to the stepping simulation device 11. The power network 53 is also powered by a power supply 54. The pressure sensor 52 is arranged at the brake caliper 51 for detecting the pressure information received by the brake caliper 51 and sending it to the main control device 20. The brake controller 50 sends a control signal to the brake caliper 51 to make the brake caliper 51 perform a clamping action.

[0036] It should be noted that the above-mentioned pressure sensor is used to measure the pressure change of the brake caliper, convert the pressure signal into an electrical signal and output it to the main control device; the support is used to provide stable support for the test vehicle, ensure that the vehicle is in the correct position and posture during the test, and prevent the vehicle from moving or shaking from affecting the test results. At the same time, the support can also bear the weight of the vehicle to ensure the safety of the test environment. The support can be made of a material with electromagnetic shielding performance, which can effectively isolate the electromagnetic coupling between the vehicle and the ground, reduce the influence of external electromagnetic interference on the vehicle braking system, and improve the accuracy of the test. The power network is used to provide stable power supply for the braking system to ensure that each component can work normally during the test.

[0037] In this embodiment, by setting the brake controller, the operation of the brake caliper can be accurately controlled to accurately adjust parameters such as braking pressure and braking time, which is applicable to complex test scenarios of different types of vehicles and different braking systems. By setting the brake caliper, it can directly act on the wheel and achieve the braking effect by clamping the brake disc, and can truly simulate the braking process of the vehicle during actual driving.

[0038] To better understand and illustrate the electromagnetic compatibility test method for the electronic brake-by-wire function provided in the embodiments of the present application, the following will be Figures 4 to 7 explained in detail.

[0039] Figure 4 FIG. Figure 4 shows a schematic flow chart of the electromagnetic compatibility test method for the electronic brake-by-wire function provided in the embodiments of the present application. As shown, this method is executed by a main control device, which can be implemented as part or all of the main control device in a software, hardware, or software-hardware combination manner. The method includes: S101. Control the brake simulation device to apply pressure to the brake pedal of the test vehicle to generate a brake signal.

[0040] S102. Obtain first brake response information and first pressure information; the first brake response information is determined by the brake controller controlling the brake execution component to perform a braking operation according to the brake signal when no electromagnetic interference is applied, and the first pressure information is obtained by detecting the pressure on the brake execution component when no electromagnetic interference is applied.

[0041] It should be noted that the above test vehicle refers to a vehicle that needs to perform electromagnetic compatibility testing on the electronic brake-by-wire function. It can be one vehicle or multiple vehicles. The test vehicle can be an electric vehicle, a fuel vehicle, or a hybrid vehicle. It can include an engine system, a drive system, a brake system, a running system, etc. The brake system can be an electronic brake-by-wire system.

[0042] Specifically, taking the brake system as an electronic brake-by-wire system as an example, before the test, the test system is arranged and built on the experimental table, and the experimental table is placed in the uniform field strength area of the reverberation chamber. The main control device serves as the main controller of the test system and generates a control signal to be sent to the brake simulation device. The pedal simulation device in the brake simulation device receives and responds to the control signal, applies pressure to the brake pedal of the test vehicle, simulates the action of the driver stepping on the brake pedal, and thus generates a brake signal. The brake pedal sends the brake signal to the brake controller through the test harness. The brake controller analyzes the brake signal and converts it into an electrical signal, and sends the electrical signal to the brake execution component through the test harness.

[0043] The above brake execution component can be a brake caliper. The brake caliper receives and responds to the electrical signal, performs a clamping operation to output braking force, and obtains the first brake response information. The first brake response information refers to the time information from generating the brake signal on the brake pedal to the brake execution mechanism performing the braking operation. For example, it can be the time interval between the time of generating the brake signal on the brake pedal and the time of outputting the braking force.

[0044] As an alternative implementation, when the first braking response information is the first braking response time, during the process of the main control device obtaining the first braking response time, it can record the time when the braking signal is generated by the brake pedal and the time when the braking force is output, and then subtract the time when the braking force is output from the time when the braking signal is generated by the brake pedal to obtain the first braking response time. And the first pressure information of the brake caliper is detected in real time through a pressure sensor and sent to the main control device, so that the main control device obtains the first pressure information. The first pressure information can be a first pressure value, which is the pressure value obtained by detecting the pressure of the braking execution component when no electromagnetic interference is applied.

[0045] S103. Control the electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle.

[0046] It can be understood that in order to verify the adaptability of the wire control braking function of the test vehicle in a complex electromagnetic environment, it is necessary to generate electromagnetic interference to the test vehicle. The main control device can control the electromagnetic interference generating device to emit electromagnetic waves to the test vehicle, so as to generate electromagnetic interference to the test vehicle.

[0047] Among them, the above-mentioned electromagnetic interference generating device includes: a reverberation chamber and a shielding chamber. The reverberation chamber includes a transmitting antenna and a tuner. The shielding chamber includes: a signal generator, a power amplifier and a directional coupler.

[0048] Controlling the electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle includes: obtaining test configuration parameters; the test configuration parameters include: test frequency, test level, stirring method, reference point, antenna polarization method, scanning step, modulation method, dwell time; the test frequency includes multiple test frequency bands; according to the test configuration parameters, control the signal generator, power amplifier, transmitting antenna, and tuner to perform parameter configuration; control the signal generator that has completed parameter configuration to generate an initial radio frequency signal, and control the power amplifier that has completed parameter configuration to amplify the initial radio frequency signal; control the directional coupler that has completed parameter configuration to couple the amplified radio frequency signal and transmit it to the reverberation chamber through the transmitting antenna that has completed parameter configuration; control the tuner that has completed parameter configuration to tune the radio frequency signal in the reverberation chamber to generate electromagnetic interference to the test vehicle.

[0049] Before generating electromagnetic interference to the test vehicle, it is necessary to calibrate and verify the directional coupler, tuner, signal generator, power amplifier, radio frequency antenna, etc. in the above-mentioned electromagnetic interference generating device to ensure the accuracy of the test environment. The signal generator, directional coupler and power amplifier cooperate with each other to be able to generate electromagnetic fields of various frequencies and intensities in the reverberation chamber, simulating the electromagnetic interference situations that the vehicle may encounter in the real environment.

[0050] It should be noted that when conducting compatibility tests on the electronic brake function of the test vehicle, it is necessary to ensure that the detection environment and sample conditions are within a certain range. Among them, the detection environment and sample conditions include ambient temperature and ambient humidity. For example, the ambient temperature is between 23°C - 5°C to 23°C + 5°C, and the ambient humidity is between 30% - 60%. It can be seen in Table 1 below: Table 1

[0051] And configure test configuration parameters for the signal generator, power amplifier, transmitting antenna, and tuner in the electromagnetic interference generating device. The above test configuration parameters can be custom-set by the user according to the attributes of the actual electromagnetic interference generating device and the requirements of electromagnetic compatibility tests. It can be seen in Table 2 below: Table 2

[0052] Specifically, during the process of generating electromagnetic interference to the test vehicle, the main control device can first obtain the test configuration parameters, and according to the test configuration parameters, control the parameter configuration of the signal generator, power amplifier, transmitting antenna, and tuner in the electromagnetic interference generating device. For example, configure various different test frequency bands and modulation methods for the signal generator. The signal generator generates radio frequency signals of different frequencies as the excitation source of electromagnetic interference. Configure the test level for the power amplifier, and configure the stirring method for the stirrer in the reverberation chamber to change the reflection and scattering characteristics, so as to form a uniform electromagnetic field in the reverberation chamber. Configure the antenna polarization method for the transmitting antenna. The polarization method of the transmitting antenna determines the direction of the electric field vector of the radiated electromagnetic wave, such as vertical polarization or horizontal polarization, etc. Different polarization methods may have different electromagnetic coupling effects on the test vehicle, thus affecting the test results. It is necessary to select a suitable antenna polarization method according to the test standard and actual situation to comprehensively evaluate the electromagnetic compatibility of the braking system. The signal generator can generate various complex radio frequency signals through different modulation methods (such as amplitude modulation, frequency modulation, phase modulation) to simulate the characteristics of interference signals in the actual electromagnetic environment, so as to more comprehensively test the immunity performance of the braking system under different modulation type interferences. The above dwell time refers to the time maintained at each test point or each test state.

[0053] After the parameter configuration is completed, control the signal generator in the electromagnetic interference generating device that has completed the parameter configuration to generate an initial radio frequency signal, control the power amplifier in the electromagnetic interference generating device to amplify the initial radio frequency signal to obtain an amplified radio frequency signal, control the directional coupler that has completed the parameter configuration to couple the amplified radio frequency signal, and control the transmitting antenna that has completed the parameter configuration in the electromagnetic interference generating device to transmit the amplified radio frequency signal to the reverberation chamber. Furthermore, control the tuner that has completed the parameter configuration to tune the radio frequency signal in the reverberation chamber to generate electromagnetic interference to the test vehicle.

[0054] In this step, by transmitting electromagnetic waves to the test vehicle, electromagnetic interference can be generated to the test vehicle, so as to simulate an electromagnetic interference environment for the test vehicle, facilitating the application of an environment that is more in line with the actual application scenario to the test vehicle, and facilitating the subsequent electromagnetic compatibility test of the electronic stability control function of the test vehicle.

[0055] S104. Obtain the second braking response information and the second pressure information; the second braking response information is determined by the brake controller according to the braking signal to control the brake execution assembly to perform a braking operation after the electromagnetic interference is applied, and the second pressure information is obtained by detecting the pressure of the brake execution assembly after the electromagnetic interference is applied.

[0056] Specifically, in the process of obtaining the second braking response information and the second pressure information, the brake simulation device can be controlled to apply pressure to the brake pedal to generate a braking signal, so that the brake pedal sends the braking signal to the brake controller; when the brake controller controls the brake execution assembly to perform a braking operation according to the braking signal, record the second braking response information, and detect the pressure of the brake execution assembly to obtain the second pressure information.

[0057] After applying electromagnetic interference to the test vehicle, the main control device generates a control signal and sends it to the brake simulation device, so that the pedal simulation device in the brake simulation device applies the same pressure to the brake pedal as before the above-mentioned interference is applied, thereby forming a braking signal. The brake pedal sends the braking signal to the brake controller, and the brake controller converts the braking signal into an electrical signal and sends the electrical signal to the brake execution assembly through the test harness, so that after the brake execution assembly performs a braking operation, record the second braking response information, and detect the pressure of the brake execution assembly to obtain the second pressure information.

[0058] Among them, the above-mentioned brake simulation device includes: a cylinder; controlling the brake simulation device to apply pressure to the brake pedal to generate a braking signal includes: determining the movement stroke of the cylinder according to the pressure; controlling the cylinder to perform an extension action according to the movement stroke to apply pressure to the brake pedal to generate a braking signal.

[0059] It should be noted that the user can establish and store the mapping relationship between the pressure and the movement stroke of the cylinder based on historical data. Each pressure corresponds to the movement stroke of the cylinder. When controlling the braking simulation device to apply pressure to the brake pedal, the movement stroke of the cylinder corresponding to the pressure is searched from the mapping relationship, and then the cylinder is controlled to perform an elongation action according to the movement stroke to apply pressure to the brake pedal and generate a braking signal.

[0060] The above pedal simulation device adjusts the action force and speed of the brake pedal by using air pressure. For example, it can include an air pump and a cylinder connected to the air pump. The pedal control module can control the air pump so that the cylinder changes its telescopic state. The pedal simulation device receives control instructions from the main control device installed with test software through a precise air pressure valve and cylinder system, and precisely controls the brake pedal to perform the operation corresponding to the pressure.

[0061] Optionally, the main control device can be internally configured with brake pedal control software to control the braking simulation device to perform a braking operation on the brake pedal of the test vehicle through the brake pedal control software. The above system can also include a pneumatic control module. The main control device can generate a control signal and send it to the pneumatic control module, so that the pneumatic control module receives and responds to the control signal, and injects or discharges air into the cylinder through the air pump control. When air is injected into the cylinder, the cylinder elongates to drive the brake control module to perform a stepping action on the brake pedal of the test vehicle; when air is discharged from the cylinder, the cylinder contracts to drive the pneumatic robot to perform a releasing action on the brake pedal of the test vehicle.

[0062] The pneumatic control module controls the cylinder to elongate according to the movement stroke of the cylinder to drive the brake control module to perform a stepping action on the brake pedal of the test vehicle, thereby applying a corresponding pressure, forming a corresponding braking signal, recording the time when the brake pedal generates the braking signal, and recording the time when the braking force is output. Then, the output braking force is subtracted from the time when the brake pedal generates the braking signal to obtain the second braking response time, and the second pressure information of the brake caliper is detected in real time through a pressure sensor and sent to the main control device, so that the main control device can obtain the second pressure information.

[0063] S105. According to the first braking response information, the second braking response information, the first pressure information, and the second pressure information, perform electromagnetic compatibility test analysis on the braking system of the test vehicle to obtain a test result.

[0064] It should be noted that after the test is completed, the data needs to be evaluated, and multiple indicators can be considered, including whether there is abnormal braking or abnormal braking response. Among them, the multiple indicators can be custom-set according to actual needs.

[0065] In an embodiment of the present application, there is also provided a specific implementation manner for performing electromagnetic compatibility test analysis on the braking system of a test vehicle according to first braking response information, second braking response information, first pressure information, and second pressure information, and obtaining a test result. Please refer to Figure 5 as shown in Figure 5 FIG. Figure 5 is a schematic flow chart of a method for performing electromagnetic compatibility test analysis on the braking system of a test vehicle according to an embodiment of the present application and obtaining a test result. The method includes: S201. Determine whether the test vehicle has abnormal braking response according to the first braking response information and the second braking response information; and determine whether the test vehicle has abnormal braking according to the first pressure information and the second pressure information.

[0066] S202. When the test vehicle has no abnormal response and no abnormal braking, determine that the test result is passed.

[0067] S203. When the test vehicle has abnormal braking response, and / or, the test vehicle has abnormal braking, determine that the test result is not passed.

[0068] After obtaining the first braking response information, the second braking response information, the first pressure information, and the second pressure information, when the cylinder stroke without interference is the same as the cylinder stroke after interference, that is, when the pressure applied to the brake pedal before and after interference is the same, the brake caliper pressure information without interference is the first pressure information, the brake caliper pressure information when interference is applied is the second pressure information, the response information without interference is the first response information, and the response information when interference is applied is the second response information. Compare the first braking response information with the second braking response information, and compare the first pressure information with the second pressure information.

[0069] Please refer to Figure 6 as shown in Figure 6 in which the horizontal axis is the time axis, the vertical axis is the cylinder stroke and the brake caliper pressure, the vertical axis corresponding to the darker curve is the cylinder stroke, and the vertical axis corresponding to the lighter curve is the brake caliper pressure.

[0070] It should be noted that for the case without interference, at time T 1 , the cylinder stroke is L 1 , at time T 2 , the brake caliper pressure is L 2 , it can be understood that when the cylinder stroke in the brake pedal signal is L 1 , after a time of (T 2 - T 1 ), the brake caliper reaches the clamping force L 2 . After applying an electromagnetic interference signal to the test vehicle, at time t 1At this moment, the cylinder stroke is S 1 , at time t 2 , the brake caliper pressure is S 2 . It can be understood that when the cylinder stroke is S 1 in the brake pedal signal, after a time of (t 2 - t 1 ), the brake caliper reaches the clamping force S 2 .

[0071] When L 1 = S 1 and T 1 = t 1 , if L 2 ≠ S 2 , it indicates that the test vehicle has a braking abnormality, that is, the test result is a failed test; when T 2 ≠ t 2 , it indicates that the running speed is abnormal, generally there is a braking delay. That is to say, when (t 2 - t 1 ) is greater than (T 2 - T 1 ), it represents that the test vehicle has a lag and a slow braking reaction, that is, the test result is a failed test.

[0072] When the first braking response information and the second braking response information are different, it is determined that the test vehicle has a braking response abnormality. When the first braking response information and the second braking response information are the same, it is determined that the test vehicle does not have a braking response abnormality.

[0073] When the first pressure information and the second pressure information are different, it is determined that the test vehicle has a braking abnormality. When the first pressure information and the second pressure information are the same, it is determined that the test vehicle does not have a braking abnormality.

[0074] When the test vehicle does not have a braking response abnormality and does not have a braking abnormality, it represents that the medium line braking function of the test vehicle has strong anti-interference ability to electromagnetic, that is, the test result is a passed test; when the test vehicle has a braking response abnormality, or when the test vehicle has a braking abnormality, it represents that the medium line braking function of the test vehicle has weak anti-interference ability to electromagnetic, that is, the test result is a failed test; when the test vehicle has a braking abnormality and a braking response abnormality, it represents that the medium line braking function of the test vehicle has weak anti-interference ability to electromagnetic, that is, the test result is a failed test.

[0075] Furthermore, after determining the electromagnetic compatibility test result of the line braking function, the test results, test environment, test steps, test parameters, etc. during the entire test process can be sorted out, and the abnormal conditions when the test fails can be analyzed and sorted out to generate a corresponding test report.

[0076] The electromagnetic compatibility test method for the electronic brake function provided by the embodiment of the present application includes: controlling a brake simulation device to apply pressure to the brake pedal of a test vehicle to generate a brake signal, and obtaining first brake response information and first pressure information; controlling an electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle, and obtaining second brake response information and second pressure information; and performing electromagnetic compatibility test analysis on the brake system of the test vehicle according to the first brake response information, the second brake response information, the first pressure information, and the second pressure information to obtain a test result. Compared with the prior art, by using the brake simulation device to apply pressure to the brake pedal of the test vehicle, this technical solution can more realistically simulate the braking behavior on the brake pedal in the actual vehicle driving scenario, making the test environment closer to the real situation, ensuring the reliability and effectiveness of the test result, and obtaining the first brake response information and the first pressure information without interference, as well as the second brake response information and the second pressure information after interference. Thus, it can comprehensively reflect the working conditions of the brake system in the normal state and under electromagnetic interference. By comparing and analyzing these information, the influence degree of electromagnetic interference on the brake system can be accurately evaluated, so as to accurately evaluate the performance of the brake system in the electromagnetic interference environment, which helps to discover potential electromagnetic compatibility problems existing in the design and manufacturing process of the vehicle electronic brake system.

[0077] On the other hand, please continue to refer to Figure 1 As shown, the embodiment of the present application provides an electromagnetic compatibility test system for the electronic brake function. The system includes: a brake simulation device 10, a main control device 20, and an electromagnetic interference generating device 30; the main control device 20 is respectively communicatively connected to the brake simulation device 10 and the electromagnetic interference generating device 30.

[0078] The main control device 20 is configured to: control the brake simulation device to apply pressure to the brake pedal of the test vehicle to generate a brake signal; obtain the first brake response information and the first pressure information; control the electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle; obtain the second brake response information and the second pressure information; perform electromagnetic compatibility test analysis on the brake system of the test vehicle according to the first brake response information, the second brake response information, the first pressure information, and the second pressure information to obtain a test result; wherein, the first brake response information is determined after the brake controller controls the brake execution component to perform a braking operation according to the brake signal without applying electromagnetic interference, and the first pressure information is obtained by detecting the pressure of the brake execution component without applying electromagnetic interference; the second brake response information is determined after the brake controller controls the brake execution component to perform a braking operation according to the brake signal after applying electromagnetic interference, and the second pressure information is obtained by detecting the pressure of the brake execution component after applying electromagnetic interference; The electromagnetic interference generating device 30 is configured to: transmit electromagnetic waves to a test vehicle to generate electromagnetic interference to the test vehicle; The braking simulation device 10 is configured to: apply pressure to the brake pedal of the test vehicle to generate a braking signal.

[0079] In one embodiment, please continue to refer to Figure 3 As shown, the electromagnetic compatibility test system for the by-wire braking function further includes: a brake controller and a brake execution component; the brake controller is connected to the brake execution component.

[0080] The brake controller is configured to: receive the braking signal of the brake pedal and send the braking signal to the brake execution component; the control brake execution component is configured to: in response to the braking signal, perform a braking operation.

[0081] Compared with the prior art, the electromagnetic compatibility test system for the by-wire braking function provided in this embodiment can more realistically simulate the braking behavior of the brake pedal in the actual vehicle driving scenario by applying pressure to the brake pedal of the test vehicle through the braking simulation device, making the test environment closer to the real situation, ensuring the reliability and effectiveness of the test results, and obtaining the first braking response information and the first pressure information when no interference is applied, as well as the second braking response information and the second pressure information after applying interference. Thus, it can comprehensively reflect the working conditions of the braking system in the normal state and the state of being subjected to electromagnetic interference. By comparing and analyzing these information, the influence degree of electromagnetic interference on the braking system can be accurately evaluated, so as to accurately evaluate the performance of the braking system in the electromagnetic interference environment, which helps to discover potential electromagnetic compatibility problems existing in the design and manufacturing process of the vehicle by-wire braking system.

[0082] Figure 7 It is a schematic structural diagram of a main control device provided in an embodiment of the present invention. As Figure 7 shown, it shows a schematic structural diagram of the main control device 20 suitable for implementing the embodiments of the present application.

[0083] As Figure 7 shown, the main control device 20 includes a central processing unit (CPU) 401, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 402 or the program loaded from the storage section 408 into the random access memory (RAM) 403. In the RAM 403, various programs and data required for system operation are also stored. The CPU 401, the ROM 402, and the RAM 403 are connected to each other through a bus 404. The input / output (I / O) interface 405 is also connected to the bus 404.

[0084] The following components are connected to the I / O interface 405: an input section 406 including a keyboard, a mouse, etc.; an output section 407 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc. and a speaker, etc.; a storage section 408 including a hard disk, etc.; and a communication section 409 including a network interface card such as a LAN card, a modem, etc. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to the I / O interface 405 as needed. A removable medium 411, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 410 as needed so that a computer program read therefrom is installed into the storage section 408 as needed.

[0085] In particular, according to an embodiment of the present disclosure, the processes described above with reference to Figure 4 can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product that includes a computer program tangibly embodied on a machine-readable medium, the computer program including program code for performing Figure 4 the method. In such an embodiment, the computer program can be downloaded and installed from a network via the communication section 409, and / or installed from the removable medium 411.

[0086] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the foregoing module, program segment, or part of code includes one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions noted in the blocks may occur in a different order than noted in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0087] The units or modules involved in the embodiments described in this application can be implemented in software or in hardware. The described units or modules can also be provided in a processor.

[0088] As another aspect, the present application also provides a computer-readable medium, which may be included in the processing device described in the above embodiments; or may exist alone without being assembled into the main control device. The above computer-readable medium carries one or more programs, and when the one or more programs are executed by a main control device, the main control device is caused to implement the electromagnetic compatibility test method for the electronic brake control function as described in the above embodiments.

[0089] As yet another aspect, the present application also provides a computer program product, including a computer program, which when executed by a processor implements the electromagnetic compatibility test method for the electronic brake control function provided in the above embodiments.

[0090] For example, the main control device may implement as Figure 4 shown in: Step S101, controlling a brake simulation device to apply pressure to a brake pedal of a test vehicle to generate a brake signal; Step S102, obtaining first brake response information and first pressure information; the first brake response information is determined by a brake controller according to the brake signal to control a brake execution component to perform a brake operation when no electromagnetic interference is applied, and the first pressure information is obtained by performing pressure detection on the brake execution component when no electromagnetic interference is applied; Step S103, controlling an electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle; Step S104, obtaining second brake response information and second pressure information; the second brake response information is determined by the brake controller according to the brake signal to control the brake execution component to perform a brake operation after electromagnetic interference is applied, and the second pressure information is obtained by performing pressure detection on the brake execution component after electromagnetic interference is applied; Step S105, performing electromagnetic compatibility test analysis on the brake system of the test vehicle according to the first brake response information, the second brake response information, the first pressure information, and the second pressure information to obtain a test result. Again, the main control device may also implement each step as Figure 5 shown in.

[0091] It should be noted that although several modules or units of devices for action execution are mentioned in the above detailed description, such a division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of the two or more modules or units described above may be embodied in one module or unit. Conversely, the features and functions of one module or unit described above may be further divided and embodied by multiple modules or units.

[0092] In addition, although the various steps of the methods in the present disclosure are described in a specific order in the drawings, this does not require or imply that these steps must be performed in that specific order, or that all of the steps shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution, etc. Through the description of the above embodiments, those skilled in the art can easily understand that the example embodiments described herein can be implemented by software, or by a combination of software and necessary hardware.

[0093] The above description is only a preferred embodiment of the present application and an explanation of the technical principles applied. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. An electromagnetic compatibility test method for a brake-by-wire function, characterized in that: The electromagnetic compatibility test method of the wire control brake function includes: Controlling the brake simulation device to apply pressure to the brake pedal of the test vehicle to generate a brake signal; Acquire first braking response information and first pressure information; the first braking response information is determined after the brake controller controls the braking actuator to perform a braking operation according to the braking signal when no electromagnetic interference is applied, and the first pressure information is obtained by performing pressure detection on the braking actuator when no electromagnetic interference is applied; Controlling the electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle; Acquire second brake response information and second pressure information; the second brake response information is determined after the brake controller controls the brake actuator to perform a brake operation according to the brake signal after electromagnetic interference is applied, and the second pressure information is obtained by performing pressure detection on the brake actuator after electromagnetic interference is applied; An electromagnetic compatibility test analysis is performed on the brake system of the test vehicle according to the first brake response information, the second brake response information, the first pressure information, and the second pressure information to obtain a test result.

2. The electromagnetic compatibility test method of the brake-by-wire function according to claim 1, characterized in that: Acquiring second braking response information and second pressure information includes: Controlling the brake simulation device to apply the pressure to the brake pedal and generate the brake signal, so that the brake pedal sends the brake signal to the brake controller; After the brake controller controls the brake actuator to perform a braking operation according to the brake signal, the second brake response information is recorded, and a pressure test is performed on the brake actuator to obtain the second pressure information.

3. The electromagnetic compatibility test method of the brake-by-wire function according to claim 2, characterized in that: The brake simulation device comprises: a cylinder; controlling the brake simulation device to apply the pressure to the brake pedal to generate the brake signal comprises: determining the movement stroke of the cylinder according to the pressure; The cylinder is controlled to extend according to the movement stroke to apply the pressure to the brake pedal and generate the brake signal.

4. The method according to claim 1, characterized in that: According to the first braking response information, the second braking response information, the first pressure information, and the second pressure information, an electromagnetic compatibility test analysis is performed on the braking system of the test vehicle to obtain a test result, including: judging whether the test vehicle has a braking response abnormality according to the first braking response information and the second braking response information; and judging whether the test vehicle has a braking abnormality according to the first pressure information and the second pressure information; When the test vehicle has no abnormal braking response and no braking abnormality, determining that the test result is a test pass; When the test vehicle has an abnormal braking response and / or the test vehicle has an abnormal braking, the test result is determined to be a test failure.

5. The method according to claim 4, characterized in that determining whether the test vehicle has a braking response abnormality according to the first braking response information and the second braking response information; And judging whether the test vehicle has a braking abnormality according to the first pressure information and the second pressure information, including: When the first braking response information and the second braking response information are different, it is determined that the test vehicle has a braking response abnormality, and when the first braking response information and the second braking response information are the same, it is determined that the test vehicle has no braking response abnormality; When the first pressure information and the second pressure information are different, it is determined that the test vehicle has a braking abnormality, and when the first pressure information and the second pressure information are the same, it is determined that the test vehicle has no braking abnormality.

6. The electromagnetic compatibility test method of the brake-by-wire function according to claim 1, characterized in that: The electromagnetic interference generating device comprises: a reverberation chamber and a shielding chamber, wherein the reverberation chamber comprises a transmitting antenna and a tuner, and the shielding chamber comprises: a signal generator, a power amplifier and a directional coupler; Controlling the electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle includes: Acquire test configuration parameters; the test configuration parameters include: test frequency, test level, stirring mode, reference point, antenna polarization mode, scanning step, modulation mode, and dwell time; the test frequency includes multiple test frequency bands; According to the test configuration parameters, controlling the signal generator, power amplifier, transmitting antenna, directional coupler, and tuner to perform parameter configuration; Controlling a signal generator having completed parameter configuration to generate an initial radio frequency signal, and controlling a power amplifier having completed parameter configuration to amplify the initial radio frequency signal; Control the directional coupler with completed parameter configuration to couple the amplified radio frequency signal and transmit it to the reverberation chamber through the transmitting antenna with completed parameter configuration; The tuner that has completed parameter configuration is controlled to perform tuning processing on the radio frequency signal in the reverberation chamber to generate electromagnetic interference to the test vehicle.

7. An electromagnetic compatibility test system for a brake-by-wire function, characterized in that: include: A braking simulation device, a main control device, and an electromagnetic interference generating device; the main control device establishes communication connections with the braking simulation device and the electromagnetic interference generating device respectively; The main control device is used to: control the brake simulation device to apply pressure to the brake pedal of the test vehicle to generate a brake signal; obtain first brake response information and first pressure information; control the electromagnetic interference generating device to emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle; Acquire second braking response information and second pressure information; perform electromagnetic compatibility test analysis on the braking system of the test vehicle according to the first braking response information, the second braking response information, the first pressure information and the second pressure information to obtain test results; wherein, the first braking response information is determined after the braking controller controls the braking actuator to perform a braking operation according to the braking signal when no electromagnetic interference is applied, and the first pressure information is obtained by performing pressure detection on the braking actuator when no electromagnetic interference is applied; the second braking response information is determined after the braking controller controls the braking actuator to perform a braking operation according to the braking signal after electromagnetic interference is applied, and the second pressure information is obtained by performing pressure detection on the braking actuator after electromagnetic interference is applied; The electromagnetic interference generating device is used to: emit electromagnetic waves to the test vehicle to generate electromagnetic interference to the test vehicle; The brake simulation device is used to apply pressure to the brake pedal of the test vehicle to generate a brake signal.

8. The electromagnetic compatibility test system for brake-by-wire function according to claim 7, characterized in that: The electromagnetic compatibility test system for the wire control brake function further includes: a brake controller and a brake actuator component; the brake controller is connected to the brake actuator component; The brake controller is used to: receive a brake signal from the brake pedal and send the brake signal to the brake actuator; The control brake actuation component is used for: executing a braking operation in response to the braking signal.

9. A main control device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the electromagnetic compatibility test method for the wire control brake function according to any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the electromagnetic compatibility testing method of the wire control brake function described in any one of claims 1 to 6 is implemented.

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