Vehicle high-low voltage coupling test method, device, system, medium and equipment

Abstract

The invention provides a vehicle high and low voltage coupling test method, device and system, a medium and equipment. The method comprises the following steps: inputting a high voltage test signal injected with an EFT signal into a to-be-tested vehicle; acquiring the output voltage of the electric equipment of the vehicle to be tested; calculating the coupling degree of the low-voltage output voltage and the high-voltage test signal; based on the coupling degree, determining the high-low voltage electromagnetic compatibility of the to-be-tested vehicle; a high-voltage EFT signal is generated, injected into a charging voltage signal and transmitted to a to-be-tested vehicle, a signal line and a low-voltage power line of high-voltage electric equipment of the to-be-tested vehicle are collected, and the coupling degree of the low-voltage output voltage and the high-voltage test signal is calculated so as to judge the high-low voltage coupling electromagnetic compatibility performance of the to-be-tested vehicle. The EFT interference signal is actively injected in the charging process to test the coupling performance between the high-voltage system of the to-be-tested vehicle and the low-voltage signal line and the low-voltage power line, and data support is provided for the electromagnetic compatibility design of the vehicle, so that the driving safety of the vehicle and the user experience are improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle electromagnetic compatibility testing, and in particular to a vehicle high-low voltage coupling testing method, device, system, medium and equipment. Background Art

[0002] With the rapid development of automobile intelligence and electrification, the electromagnetic compatibility problems of electric vehicles are increasing. Electric vehicles are usually equipped with high-voltage and low-voltage electrical equipment. Among them, high-voltage electrical equipment includes power batteries, motors and motor controllers, DC / DC converters (DC / DC), on-board chargers (OBC), electric compressors, electric heaters (PTC) and high-voltage wiring harnesses. High-voltage electrical equipment will generate strong electromagnetic interference when powered on, which may affect the normal operation of low-voltage electrical equipment, not only affecting the electromagnetic compatibility performance of the entire electric vehicle, but also directly related to driving safety and customer satisfaction. Therefore, there is an urgent need for a test method for the high and low voltage electromagnetic compatibility of vehicles. Summary of the invention

[0003] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a vehicle high-low voltage coupling test method, device, system, medium and equipment.

[0004] According to one aspect of the present application, a vehicle high-low voltage coupling test method is provided, which is applied to a vehicle high-low voltage coupling test system, wherein the vehicle high-low voltage coupling test system includes a test signal generating device, a charging line, an insulating support device and a signal acquisition device, wherein the test signal generating device is connected to a power supply, and is used to generate a high-voltage EFT signal and inject it into a charging voltage signal, the charging line connects the test signal generating device and a vehicle to be tested, and is used to transmit the charging voltage signal injected with the high-voltage EFT signal to the vehicle to be tested, the insulating support device is arranged between the charging line and the ground, and is used to achieve insulation between the charging line and the ground, and the signal acquisition device is connected to the low-voltage electrical equipment of the vehicle to be tested, and is used to collect the low-voltage output voltage of the low-voltage electrical equipment; the vehicle high-low voltage coupling test method includes: generating a high-voltage EFT signal and injecting a charging voltage signal to obtain a high-voltage test signal; inputting the high-voltage test signal into the vehicle to be tested; collecting the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested; calculating the coupling degree between the low-voltage output voltage and the high-voltage test signal; based on the coupling degree, determining the high-low voltage electromagnetic compatibility performance of the vehicle to be tested.

[0005] In one embodiment, the calculating the coupling degree between the low voltage output voltage and the high voltage test signal comprises: calculating the coupling coefficient between the low voltage output voltage and the high voltage test signal; wherein the coupling coefficient=20× lg(peak voltage of the high-voltage test signal ÷ peak voltage of the low-voltage output voltage); based on the coupling coefficient, determine the coupling degree between the low-voltage output voltage and the high-voltage test signal.

[0006] In one embodiment, the high voltage EFT signal includes a plurality of bipolar electrical fast transient pulse signals in asynchronous timing.

[0007] In one embodiment, the low-voltage electrical equipment includes a central control screen and a wiper; wherein, collecting the low-voltage output voltage of the low-voltage electrical equipment of the vehicle under test includes: collecting the low-voltage output voltage of the central control screen and the wiper.

[0008] In one embodiment, the vehicle high-low voltage coupling test method also includes: collecting continuous multiple frames of image information of the low-voltage electrical equipment; based on the continuous multiple frames of image information, calculating the status information of the low-voltage electrical equipment; wherein the status information represents the action information of the low-voltage electrical equipment; determining the high and low voltage electromagnetic compatibility performance of the vehicle to be tested based on the coupling degree includes: determining the high and low voltage electromagnetic compatibility performance of the vehicle to be tested based on the coupling degree and the status information of the low-voltage electrical equipment.

[0009] In one embodiment, the vehicle high-low voltage coupling test method also includes: collecting the high-voltage output voltage of the high-voltage electrical equipment of the vehicle to be tested; the calculation of the coupling degree between the low-voltage output voltage and the high-voltage test signal includes: calculating the coupling degree between the low-voltage output voltage and the high-voltage output voltage.

[0010] According to another aspect of the present application, a vehicle high-low voltage coupling test device is provided, which is arranged in a vehicle high-low voltage coupling test system, and the vehicle high-low voltage coupling test system includes a test signal generating device, a charging line, an insulating support device and a signal acquisition device, wherein the test signal generating device is connected to a power supply, and is used to generate a high-voltage EFT signal and inject it into a charging voltage signal, the charging line connects the test signal generating device and a vehicle to be tested, and is used to transmit the charging voltage signal injected with the high-voltage EFT signal to the vehicle to be tested, the insulating support device is arranged between the charging line and the ground, and is used to achieve insulation between the charging line and the ground, and the signal acquisition device The low-voltage electrical equipment of the vehicle to be tested is connected to collect the low-voltage output voltage of the low-voltage electrical equipment; the vehicle high-low voltage coupling test device includes: a test signal generation module, which is used to generate a high-voltage EFT signal and inject a charging voltage signal to obtain a high-voltage test signal; a test signal input module, which is used to input the high-voltage test signal into the vehicle to be tested; an output voltage acquisition module, which is used to collect the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested; a coupling degree calculation module, which is used to calculate the coupling degree between the output voltage and the high-voltage test signal; an electromagnetic compatibility determination module, which is used to determine the high and low voltage electromagnetic compatibility performance of the vehicle to be tested based on the coupling degree.

[0011] According to another aspect of the present application, a vehicle high-low voltage coupling test system is provided, including a test signal generating device, a charging line, an insulating support device, a signal acquisition device and the above-mentioned vehicle high-low voltage coupling test device; wherein, the test signal generating device is connected to a power supply, for generating a high-voltage EFT signal and injecting it into a charging voltage signal, the charging line connects the test signal generating device and a vehicle to be tested, for transmitting the charging voltage signal injected with the high-voltage EFT signal to the vehicle to be tested, the insulating support device is arranged between the charging line and the ground, for achieving insulation between the charging line and the ground, and the signal acquisition device is connected to the low-voltage electrical equipment of the vehicle to be tested, for acquiring the low-voltage output voltage of the low-voltage electrical equipment.

[0012] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the storage medium stores a computer program, and the computer program is used to execute any of the above methods.

[0013] According to another aspect of the present application, an electronic device is provided, comprising: a processor; a memory for storing instructions executable by the processor; and the processor is used to execute any of the above-described methods.

[0014] The present application provides a vehicle high-low voltage coupling test method, device, system, medium and equipment, which obtain a high-voltage test signal by generating a high-voltage EFT signal and injecting a charging voltage signal; inputting the high-voltage test signal into the vehicle to be tested; collecting the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested; calculating the coupling degree of the low-voltage output voltage and the high-voltage test signal; and determining the high- and low-voltage electromagnetic compatibility performance of the vehicle to be tested based on the coupling degree; that is, by generating a high-voltage EFT signal, injecting it into the charging voltage signal, and transmitting it to the vehicle to be tested through a charging line, by collecting the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested, calculating the coupling degree of the low-voltage output voltage and the high-voltage test signal to determine the high- and low-voltage electromagnetic compatibility performance of the vehicle to be tested. The present application actively injects EFT interference signals to test the interference performance of the high-voltage signal of the vehicle to be tested on the low-voltage electrical equipment, thereby providing data support for the electromagnetic compatibility design of the vehicle, thereby improving the driving safety and user experience of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0016] Figure 1 It is a structural schematic diagram of a vehicle high and low voltage coupling test system provided by an exemplary embodiment of the present application.

[0017] Figure 2 It is a flow chart of a vehicle high and low voltage coupling test method provided by an exemplary embodiment of the present application.

[0018] Figure 3 It is a structural schematic diagram of a vehicle high and low voltage coupling test device provided by an exemplary embodiment of the present application.

[0019] Figure 4 It is a structural diagram of an electronic device provided by an exemplary embodiment of the present application.

[0020] Explanation of the accompanying drawings: 1. Test signal generating device; 2. Charging cable; 3. Insulation support device; 4. Signal acquisition device; 5. Vehicle to be tested; 10. Electronic device; 11. Processor; 12. Memory; 13. Input device; 14. Output device. DETAILED DESCRIPTION

[0021] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0022] Figure 1 1 is a schematic diagram of the structure of a vehicle high and low voltage coupling test system provided by an exemplary embodiment of the present application. Figure 1 As shown, the vehicle high-low voltage coupling test system includes a test signal generating device 1, a charging line 2, an insulating support device 3, and a signal acquisition device 4; wherein the test signal generating device 1 is connected to a power supply, and is used to generate a high-voltage EFT signal and inject it into a charging voltage signal; the charging line 2 is connected to the test signal generating device 1 and a vehicle to be tested 5, and is used to transmit the charging voltage signal injected with the high-voltage EFT signal to the vehicle to be tested 5; the insulating support device 3 is arranged between the charging line 2 and the ground, and is used to achieve insulation between the charging line 2 and the ground; the signal acquisition device 4 is connected to the low-voltage electrical equipment of the vehicle to be tested 5, and is used to collect the low-voltage output voltage of the low-voltage electrical equipment.

[0023] Electrical Fast Transient (EFT) refers to a limited number of clearly identifiable pulse sequences or oscillations of limited duration. A single pulse in a pulse group has a specific repetition period, voltage amplitude, rise time, and pulse width. In order to evaluate the performance of power supply ports, signal and control ports of electrical and electronic equipment when disturbed by repetitive fast transients (pulse groups), and to simulate the immunity to various types of transient disturbances such as switching transient processes in the power grid (cutting off inductive loads, relay contact bouncing, etc.), this application injects EFT signals into charging signals to test the high and low voltage coupling of vehicles. In order to test the injection of EFT signals during the charging process, the voltage amplitude on the signal line or the low-voltage power supply on the vehicle is collected. Since the EFT signal is coupled to the charging interface, and then the charger transmits the electrical energy to all electrical devices in the vehicle, the injected EFT signal can be detected on the low-voltage side. The coupling degree is to judge the degree of coupling between the high-voltage system (that is, the charging system) and the low-voltage side (signal line and low-voltage power supply line) of the tested vehicle. The coupling degree can be determined from the voltage amplitude of the voltage waveform screenshot collected on the signal line and the low-voltage power supply line (for example, using an AC-coupled oscilloscope for collection), and the working status of related electrical appliances should also be observed.

[0024] The present application performs charging operation on the vehicle to be tested 5 through the charging line 2, and uses the test signal generating device 1 to inject the EFT signal into the charging voltage signal to realize the injection of the high-voltage EFT signal into the vehicle to be tested 5, and uses the signal collecting device 4 to collect the output signal at the low-voltage electrical equipment of the vehicle to be tested 5 to determine whether the input high-voltage EFT signal has an impact on the output of the low-voltage electrical equipment, and then obtain the high and low voltage electromagnetic compatibility performance of the vehicle to be tested 5. In order to reduce the loss of the charging voltage signal and the high-voltage EFT signal during the charging process, the present application sets an insulating support device 3 between the charging line 2 and the ground, and uses the insulating support device 3 to electrically isolate the charging line 2 and the ground to improve the accuracy of the test. Preferably, the thickness range of the insulating support device 3 can be set to 100mm±10mm, that is, the distance range between the charging line 2 and the ground is 100mm±10mm.

[0025] Figure 2 is a flow chart of a vehicle high-low voltage coupling test method provided by an exemplary embodiment of the present application. The vehicle high-low voltage coupling test method is applied to the above-mentioned vehicle high-low voltage coupling test system, such as Figure 2 As shown, the vehicle high and low voltage coupling test method includes the following steps: Step 110: Generate a high-voltage EFT signal and inject a charging voltage signal to obtain a high-voltage test signal.

[0026] The present application utilizes the test signal generating device 1 to generate a high-voltage EFT signal, and injects the high-voltage EFT signal into the charging voltage signal to obtain a high-voltage test signal.

[0027] Step 120: Input the high voltage test signal into the vehicle to be tested.

[0028] The present application utilizes the charging line 2 to input a high-voltage test signal into the vehicle under test 5 , so as to input a high-voltage EFT signal into the vehicle under test 5 , simulating a high-voltage signal generated by the vehicle under test 5 during the operation of high-voltage electrical equipment.

[0029] Step 130: Collect the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested.

[0030] The present application utilizes the signal acquisition device 4 to collect output signals at the low-voltage electrical equipment of the vehicle to be tested 5 to obtain the voltage signal output by the low-voltage electrical equipment under the interference of the high-voltage test signal.

[0031] Step 140: Calculate the coupling degree between the low voltage output voltage and the high voltage test signal.

[0032] The present application determines the degree of electromagnetic interference of the high-voltage test signal on the low-voltage electrical equipment by calculating the coupling degree between the low-voltage output voltage and the high-voltage test signal.

[0033] Step 150: Determine the high and low voltage electromagnetic compatibility performances of the vehicle to be tested based on the coupling degree.

[0034] The present application determines the high and low voltage electromagnetic compatibility performance of a vehicle to be tested based on the coupling degree between the low voltage output voltage and the high voltage test signal.

[0035] The present application provides a vehicle high-low voltage coupling test method, which generates a high-voltage EFT signal and injects a charging voltage signal to obtain a high-voltage test signal; inputs the high-voltage test signal into the vehicle to be tested; collects the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested; calculates the coupling degree of the low-voltage output voltage and the high-voltage test signal; and determines the high- and low-voltage electromagnetic compatibility performance of the vehicle to be tested based on the coupling degree; that is, by generating a high-voltage EFT signal, injecting it into the charging voltage signal, and transmitting it to the vehicle to be tested through a charging line, by collecting the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested, and calculating the coupling degree of the low-voltage output voltage and the high-voltage test signal to determine the high- and low-voltage electromagnetic compatibility performance of the vehicle to be tested. The present application actively injects EFT interference signals to test the interference performance of the high-voltage signal of the vehicle to be tested on the low-voltage electrical equipment, thereby providing data support for the electromagnetic compatibility design of the vehicle, thereby improving the driving safety and user experience of the vehicle.

[0036] In one embodiment, the specific implementation of the above step 140 may be: calculating the coupling coefficient between the low voltage output voltage and the high voltage test signal; wherein the coupling coefficient = 20× lg (peak voltage of high voltage test signal ÷ peak voltage of low voltage output voltage); Based on the coupling coefficient, determine the degree of coupling between the low voltage output voltage and the high voltage test signal.

[0037] The present application uses a charging line to input a high-voltage test signal to the vehicle to be tested, and uses a signal acquisition device to collect output signals at the low-voltage electrical equipment of the vehicle to be tested, calculates the coupling coefficient between the low-voltage output voltage and the high-voltage test signal based on the low-voltage output voltage and the high-voltage test signal, and determines the coupling degree between the low-voltage output voltage and the high-voltage test signal based on the coupling coefficient, thereby determining the electromagnetic isolation degree (the opposite of the coupling degree) between the low-voltage output voltage and the high-voltage test signal. Specifically, the logarithm of the ratio of the peak voltage of the high-voltage test signal to the peak voltage of the low-voltage output voltage is proportional to the coupling coefficient. For example, if the peak voltage of the high-voltage test signal (the peak voltage of the high-voltage EFT) is 2000V and the peak voltage of the low-voltage output voltage is 20V, then the coupling coefficient is 40.

[0038] In one embodiment, the high voltage EFT signal includes a plurality of bipolar electrical fast transient pulse signals in asynchronous timing.

[0039] The present application can use an electrical fast transient pulse group composed of multiple electrical fast transient pulse signals with bipolar and asynchronous timing as a high-voltage EFT signal to test the high and low voltage isolation of the vehicle to be tested. Optionally, the voltage level of the high-voltage EFT signal is 2000V, the frequency is 5kHz, the period of the electrical fast transient pulse signal is 300ms, the actual occurrence time of the electrical fast transient pulse in each period is 15ms, the duration of a single high-voltage EFT signal is 1min, the interval time between two adjacent high-voltage EFT signals is 5s, and the coupling path is L (live wire), N (neutral wire), PE (ground wire), L+N, L+PE, N+PE, L+N+PE.

[0040] In one embodiment, the low-voltage electrical equipment includes a central control screen and a wiper; wherein, the specific implementation method of the above step 130 may be: collecting the low-voltage output voltage of the central control screen and the wiper.

[0041] This application can collect the low-voltage output voltage of the low-voltage electrical equipment (including the central control screen, wipers, etc.) of the vehicle to be tested to determine whether the output voltage of the low-voltage electrical equipment is abnormal under the interference of the high-voltage test signal.

[0042] In one embodiment, the above-mentioned vehicle high-low voltage coupling test method may also include: collecting continuous multiple-frame image information of low-voltage electrical equipment; based on the continuous multiple-frame image information, calculating the status information of the low-voltage electrical equipment; wherein the status information represents the action information of the low-voltage electrical equipment; correspondingly, the specific implementation method of the above-mentioned step 150 may be: based on the coupling degree and the status information of the low-voltage electrical equipment, determining the high and low voltage electromagnetic compatibility performance of the vehicle to be tested.

[0043] The present application acquires continuous multi-frame image information of low-voltage electrical equipment (which can be multiple pictures or video information), obtains the motion information of low-voltage electrical equipment based on the continuous multi-frame image information, and comprehensively determines the high and low voltage electromagnetic compatibility performance of the vehicle to be tested by combining the motion information and output voltage of the low-voltage electrical equipment. For example, the output voltage of the wiper and the motion information of the wiper can be obtained synchronously. If the wiper produces abnormal motion under the interference of the high-voltage test signal (for example, the wiper moves when the wiper is not driven), it can be determined that the high and low voltage electromagnetic compatibility performance of the vehicle to be tested is poor. The present application can also use manual observation to obtain the status information of low-voltage electrical equipment, such as observing the movement speed of the wiper.

[0044] Preferably, the present application can test the coupling degree of low-voltage electrical equipment in working state and non-working state respectively, so as to evaluate the high and low voltage electromagnetic compatibility performance of the vehicle to be tested by comprehensively considering the coupling degree in working state and non-working state.

[0045] Preferably, when testing the coupling degree of low-voltage electrical equipment in a working state, the present application can respectively test the low-voltage output voltage without inputting a high-voltage test signal and inputting a high-voltage test signal, and determine the interference signal generated by the high-voltage test signal to the low-voltage electrical equipment based on the difference between the low-voltage output voltage without inputting a high-voltage test signal and the low-voltage output voltage with inputting a high-voltage test signal, and calculate the coupling degree between the interference signal and the high-voltage test signal to evaluate the high and low voltage electromagnetic compatibility performance of the vehicle to be tested.

[0046] In one embodiment, the above-mentioned vehicle high-low voltage coupling test method may also include: collecting the high-voltage output voltage of the high-voltage electrical equipment of the vehicle to be tested; the specific implementation method of the above-mentioned step 140 may be: calculating the coupling degree of the low-voltage output voltage and the high-voltage output voltage.

[0047] Since the high-voltage test signal may be attenuated after being input into the vehicle to be tested and passing through the high-voltage electrical equipment of the vehicle to be tested, it is difficult for the high-voltage test signal to fully reflect the high-voltage signal generated by the high-voltage electrical equipment of the vehicle to be tested during actual operation. The present application actually collects the high-voltage output voltage of the high-voltage electrical equipment of the vehicle to be tested to accurately obtain the voltage output by the high-voltage electrical equipment, and calculates the coupling degree based on the high-voltage output voltage and the low-voltage output voltage to determine the degree of interference of the high-voltage output voltage output by the high-voltage electrical equipment on the low-voltage electrical equipment.

[0048] Preferably, after collecting the high-voltage output voltage of the high-voltage electrical equipment, the present application can compare the difference between the high-voltage output voltage and the rated output voltage or the maximum output voltage of the high-voltage electrical equipment, and adjust the high-voltage test signal so that the high-voltage output voltage of the high-voltage electrical equipment reaches the rated output voltage or the maximum output voltage, thereby simulating the maximum output voltage generated by the high-voltage electrical equipment during actual operation, so as to test the low-voltage output voltage of the low-voltage electrical equipment, thereby testing the high and low voltage electromagnetic compatibility performance of the vehicle to be tested.

[0049] Preferably, the present application can also obtain the coupling degree corresponding to different high-voltage output voltages by continuously adjusting the high-voltage test signal to test, thereby obtaining a corresponding relationship diagram between the output voltage and coupling degree of the high-voltage electrical equipment of the vehicle to be tested, so that the output voltage of the high-voltage electrical equipment can be monitored during the operation of the vehicle to determine the degree of interference with the low-voltage electrical equipment. Specifically, the present application can determine the coupling degree of the low-voltage output voltage and the high-voltage test signal according to the coupling coefficient, for example, if the coupling coefficient is less than 40, it is judged as unqualified, if the coupling coefficient is greater than or equal to 40, it is judged as qualified, and if the coupling coefficient is greater than 60, it is judged as full marks (i.e. excellent).

[0050] Specifically, during the test, the EFT interference signal level is 2000V (peak voltage of the high-voltage test signal), and when the collected signal is 20V (peak voltage of the low-voltage output voltage), the calculated coupling coefficient is 40db, that is, 20× lg (2000÷20) = 40dB, which can be regarded as 60 points, that is, it is qualified; when the collected signal is 2V, the calculated coupling coefficient is 60db, that is, 20× lg (2000÷2)=60dB, which can be regarded as 100 points, that is, it is judged as excellent.

[0051] Figure 3 1 is a schematic diagram of the structure of a vehicle high-low voltage coupling test device provided by an exemplary embodiment of the present application. The vehicle high-low voltage coupling test device is arranged in the above-mentioned vehicle high-low voltage coupling test system, such as Figure 3 As shown, the vehicle high-low voltage coupling test device 30 includes: a test signal generating module 31, used to generate a high-voltage EFT signal and inject a charging voltage signal to obtain a high-voltage test signal; a test signal input module 32, used to input the high-voltage test signal into the vehicle to be tested; an output voltage acquisition module 33, used to acquire the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested; a coupling degree calculation module 34, used to calculate the coupling degree of the output voltage and the high-voltage test signal; an electromagnetic compatibility determination module 35, used to determine the high and low voltage electromagnetic compatibility performance of the vehicle to be tested based on the coupling degree.

[0052] The present application provides a vehicle high-low voltage coupling test device, which generates a high-voltage EFT signal and injects a charging voltage signal through a test signal generation module 31 to obtain a high-voltage test signal; the test signal input module 32 inputs the high-voltage test signal into the vehicle to be tested; the output voltage acquisition module 33 acquires the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested; the coupling degree calculation module 34 calculates the coupling degree of the low-voltage output voltage and the high-voltage test signal; the electromagnetic compatibility determination module 35 determines the high-voltage and low-voltage electromagnetic compatibility performance of the vehicle to be tested based on the coupling degree; that is, by generating a high-voltage EFT signal and injecting it into the charging voltage signal, and transmitting it to the vehicle to be tested through the charging line, by acquiring the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested, and calculating the coupling degree of the low-voltage output voltage and the high-voltage test signal to determine the high-voltage and low-voltage electromagnetic compatibility performance of the vehicle to be tested. The present application actively injects EFT interference signals to test the interference performance of the high-voltage signal of the vehicle to be tested on the low-voltage electrical equipment, thereby providing data support for the electromagnetic compatibility design of the vehicle, thereby improving the driving safety and user experience of the vehicle.

[0053] In one embodiment, the coupling degree calculation module 34 can be further configured to: calculate the coupling coefficient between the low voltage output voltage and the high voltage test signal; wherein the coupling coefficient = 20× lg(peak voltage of high voltage test signal ÷ peak voltage of low voltage output voltage); Based on the coupling coefficient, determine the degree of coupling between the low voltage output voltage and the high voltage test signal.

[0054] In one embodiment, the high voltage EFT signal includes a plurality of bipolar electrical fast transient pulse signals in asynchronous timing.

[0055] In one embodiment, the low-voltage electrical equipment includes a central control screen and a wiper; wherein the output voltage acquisition module 33 may be further configured to: acquire the low-voltage output voltage of the central control screen and the wiper.

[0056] In one embodiment, the above-mentioned vehicle high-low voltage coupling test device 30 can be further configured to: collect continuous multiple-frame image information of low-voltage electrical equipment; based on the continuous multiple-frame image information, calculate the status information of the low-voltage electrical equipment; wherein the status information represents the action information of the low-voltage electrical equipment; correspondingly, the above-mentioned electromagnetic compatibility determination module 35 can be further configured to: determine the high and low voltage electromagnetic compatibility performance of the vehicle to be tested based on the coupling degree and the status information of the low-voltage electrical equipment.

[0057] In one embodiment, the above-mentioned vehicle high-low voltage coupling test device 30 can be further configured to: collect the high-voltage output voltage of the high-voltage electrical equipment of the vehicle to be tested; the above-mentioned coupling degree calculation module 34 can be further configured to: calculate the coupling degree of the low-voltage output voltage and the high-voltage output voltage.

[0058] Below, reference Figure 4 The electronic device according to the embodiment of the present application is described. The electronic device may be any one or both of the first device and the second device, or a stand-alone device independent of them, and the stand-alone device may communicate with the first device and the second device to receive the collected input signal from them.

[0059] Figure 4 A block diagram of an electronic device according to an embodiment of the present application is illustrated.

[0060] like Figure 4 As shown, the electronic device 10 includes one or more processors 11 and a memory 12 .

[0061] The processor 11 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.

[0062] The memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may run the program instructions to implement the methods of the various embodiments of the present application described above and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.

[0063] In one example, the electronic device 10 may further include: an input device 13 and an output device 14 , and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0064] When the electronic device is a stand-alone device, the input device 13 may be a communication network connector, which is used to receive the collected input signals from the first device and the second device.

[0065] In addition, the input device 13 may also include, for example, a keyboard, a mouse, and the like.

[0066] The output device 14 can output various information to the outside, including the determined distance information, direction information, etc. The output device 14 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0067] Of course, to simplify, Figure 4 Only some of the components related to the present application in the electronic device 10 are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application situations, the electronic device 10 may also include any other appropriate components.

[0068] In addition to the above-mentioned methods and devices, an embodiment of the present application may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps of the method according to various embodiments of the present application described in the above-mentioned "Exemplary Method" section of this specification.

[0069] The computer program product may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the embodiments of the present application, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0070] In addition, an embodiment of the present application may also be a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor executes the steps of the method according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0071] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0072] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0073] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0074] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0075] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0076] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A vehicle high and low voltage coupling test method, characterized in that: Applicable to a vehicle high-low voltage coupling test system, the vehicle high-low voltage coupling test system includes a test signal generating device, a charging line, an insulating support device and a signal acquisition device, wherein the test signal generating device is connected to a power supply, used to generate a high-voltage EFT signal and inject it into a charging voltage signal, the charging line connects the test signal generating device and a vehicle to be tested, used to transmit the charging voltage signal injected with the high-voltage EFT signal to the vehicle to be tested, the insulating support device is arranged between the charging line and the ground, used to achieve insulation between the charging line and the ground, the signal acquisition device is connected to the low-voltage electrical equipment of the vehicle to be tested, used to collect the low-voltage output voltage of the low-voltage electrical equipment; the vehicle high-low voltage coupling test method includes: Generate a high-voltage EFT signal and inject a charging voltage signal to obtain a high-voltage test signal; Inputting the high voltage test signal into the vehicle to be tested; Collecting the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested; Calculating the coupling degree between the low voltage output voltage and the high voltage test signal; Based on the coupling degree, the high and low voltage electromagnetic compatibility performances of the vehicle to be tested are determined.

2. The vehicle high and low voltage coupling test method according to claim 1, characterized in that: The calculating the coupling degree between the low voltage output voltage and the high voltage test signal comprises: Calculate the coupling coefficient between the low voltage output voltage and the high voltage test signal; wherein the coupling coefficient=20×lg(peak voltage of the high voltage test signal÷peak voltage of the low voltage output voltage); Based on the coupling coefficient, a degree of coupling between the low-voltage output voltage and the high-voltage test signal is determined.

3. The vehicle high and low voltage coupling test method according to claim 1, characterized in that: The high-voltage EFT signal includes a plurality of bipolar electrical fast transient pulse signals in asynchronous timing.

4. The vehicle high and low voltage coupling test method according to claim 1, characterized in that: The low-voltage electrical equipment includes a central control screen and a wiper; wherein, the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested is collected including: Collect the low-voltage output voltage of the central control screen and the wiper.

5. The vehicle high and low voltage coupling test method according to claim 1, characterized in that: The vehicle high and low voltage coupling test method also includes: Collecting continuous multi-frame image information of the low-voltage electrical equipment; Based on the continuous multiple frames of image information, calculating the state information of the low-voltage electrical equipment; wherein the state information represents the action information of the low-voltage electrical equipment; Determining the high and low voltage electromagnetic compatibility performance of the vehicle to be tested based on the coupling degree includes: Based on the coupling degree and the status information of the low-voltage electrical equipment, the high and low voltage electromagnetic compatibility performances of the vehicle to be tested are determined.

6. The vehicle high and low voltage coupling test method according to claim 1, characterized in that: The vehicle high and low voltage coupling test method also includes: Collecting the high-voltage output voltage of the high-voltage electrical equipment of the vehicle to be tested; The calculating the coupling degree between the low voltage output voltage and the high voltage test signal comprises: A coupling degree between the low voltage output voltage and the high voltage output voltage is calculated.

7. A vehicle high and low voltage coupling test device, characterized in that: The vehicle high-low voltage coupling test system is provided, and the vehicle high-low voltage coupling test system includes a test signal generating device, a charging line, an insulating support device and a signal acquisition device, wherein the test signal generating device is connected to a power supply, and is used to generate a high-voltage EFT signal and inject it into a charging voltage signal, the charging line connects the test signal generating device and a vehicle to be tested, and is used to transmit the charging voltage signal injected with the high-voltage EFT signal to the vehicle to be tested, the insulating support device is provided between the charging line and the ground, and is used to achieve insulation between the charging line and the ground, and the signal acquisition device is connected to the low-voltage electrical equipment of the vehicle to be tested, and is used to collect the low-voltage output voltage of the low-voltage electrical equipment; the vehicle high-low voltage coupling test device includes: A test signal generation module, used to generate a high-voltage EFT signal and inject a charging voltage signal to obtain a high-voltage test signal; A test signal input module, used for inputting the high voltage test signal into the vehicle to be tested; An output voltage acquisition module, used for acquiring the low-voltage output voltage of the low-voltage electrical equipment of the vehicle to be tested; A coupling degree calculation module, used for calculating the coupling degree between the output voltage and the high voltage test signal; The electromagnetic compatibility determination module is used to determine the high and low voltage electromagnetic compatibility performances of the vehicle to be tested based on the coupling degree.

8. A vehicle high and low voltage coupling test system, characterized in that: It includes a test signal generating device, a charging line, an insulating support device, a signal collecting device and the vehicle high and low voltage coupling test device as described in claim 7; Among them, the test signal generating device is connected to a power supply, used to generate a high-voltage EFT signal and inject it into the charging voltage signal, the charging line connects the test signal generating device and the vehicle to be tested, used to transmit the charging voltage signal injected with the high-voltage EFT signal to the vehicle to be tested, the insulating support device is arranged between the charging line and the ground, used to achieve insulation between the charging line and the ground, and the signal acquisition device is connected to the low-voltage electrical equipment of the vehicle to be tested, used to collect the low-voltage output voltage of the low-voltage electrical equipment.

9. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and the computer program is used to execute the method according to any one of claims 1 to 6.

10. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is used to execute the method described in any one of claims 1 to 6.

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