Electromagnetic compatibility testing methods, devices, systems, media and equipment during driving

Abstract

The present application provides a method, device, system, medium and equipment for testing electromagnetic compatibility during driving, which places a vehicle to be tested on a chassis dynamometer, controls the chassis dynamometer to operate at a low speed to adjust the steady state of the vehicle to be tested on the chassis dynamometer, controls the vehicle to be tested to start and maintain a constant speed; controls a ripple generator to generate an interference ripple signal and injects it into the vehicle to be tested; detects the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal, and obtains the electromagnetic compatibility test result of the vehicle to be tested; that is, uses the chassis dynamometer and combines the steady-state operation of the vehicle to be tested to simulate the operating conditions of the vehicle to be tested, and uses the ripple generator to generate an interference ripple signal and inject it into the vehicle to be tested, detects the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal, and obtains the electromagnetic compatibility test result of the vehicle to be tested, thereby testing the electromagnetic compatibility capability of the vehicle under the influence of the interference ripple during operation.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic compatibility testing of new energy vehicles, and specifically to electromagnetic compatibility testing methods, devices, systems, media and equipment during driving. Background Art

[0002] With the rapid growth in production and sales of electric vehicles, their safety issues have also attracted much attention. The number of electronic and electrical components related to perception, communication, control, and entertainment carried by vehicles has increased sharply. Under certain extreme conditions, the ripple on the vehicle may exceed the safety threshold of the entire vehicle system, which can easily affect driving safety and pose a huge threat to the safety of the vehicle and passengers. The ripple voltage in the high-voltage system of an electric vehicle is a periodic or continuous change caused by the periodic switching of semiconductors in the system. The ripple voltage is superimposed on the DC voltage. Excessive ripple voltage not only causes serious electromagnetic interference, but also affects the performance of the entire vehicle and high-voltage components. Therefore, it is particularly important to detect the ripple voltage generated by the high-voltage components of electric vehicles. At present, there is no standardized test system, test method, or evaluation system for simulating vehicle ripple during vehicle driving. Therefore, there is an urgent need for an electromagnetic compatibility immunity method that can verify the electromagnetic compatibility of the entire vehicle system when interfering ripple is injected during operation. 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 method, device, system, medium and equipment for electromagnetic compatibility testing during driving.

[0004] According to one aspect of the present application, a method for electromagnetic compatibility testing during driving is provided, which is applied to an electromagnetic compatibility testing system during driving, wherein the electromagnetic compatibility testing system during driving includes a vehicle to be tested, a chassis dynamometer, a ripple generator and a detection device, wherein the vehicle to be tested is placed on the chassis dynamometer, the chassis dynamometer is used to monitor the operating parameters of the vehicle to be tested, the ripple generator is connected to the vehicle to be tested, the ripple generator is used to inject an interference ripple signal into the vehicle to be tested, the detection device is connected to the vehicle to be tested, and the detection device is used to detect the line signal of the vehicle to be tested under the action of the interference ripple signal; The electromagnetic compatibility testing method includes: placing the vehicle to be tested on the chassis dynamometer and setting the gear of the vehicle to be tested to neutral; controlling the chassis dynamometer to operate at a low speed to adjust the stable position and posture of the vehicle to be tested on the chassis dynamometer, and fixing the vehicle to be tested; controlling the vehicle to be tested to start and accelerate to a preset speed and then maintain a constant speed; controlling the ripple generator to generate the interference ripple signal and inject it into the vehicle to be tested; detecting the line signal and the state signal of the vehicle to be tested under the action of the interference ripple signal; and obtaining the electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the state signal.

[0005] In one embodiment, the detection device includes a voltage detection device, which is connected to the wiring harness of the vehicle to be tested and is used to detect the line voltage of the vehicle to be tested; wherein, before controlling the vehicle to be tested to start and accelerate to a preset speed and then maintain a constant speed, the electromagnetic compatibility testing method during driving also includes: controlling the ripple generator to generate a calibration ripple signal, and using the voltage detection device to detect the voltage ripple signal; based on the calibration ripple signal and the voltage ripple signal detected by the voltage detection device, performing an open-circuit calibration on the electromagnetic compatibility testing system during driving.

[0006] In one embodiment, the detection device also includes a current detection device, which is connected to the wiring harness of the vehicle to be tested and is used to detect the line current of the vehicle to be tested; wherein, the detection of the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal includes: using the current detection device to detect the line current signal after the interference ripple signal is injected; using the voltage detection device to detect the line voltage signal after the interference ripple signal is injected; calculating a first signal difference between the line current signal and the interference ripple signal, and a second signal difference between the line voltage signal and the interference ripple signal; if the first signal difference and the second signal difference are both less than or equal to a preset difference threshold, then using the line current signal or the line voltage signal as the line signal.

[0007] In one embodiment, detecting the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal includes: if the first signal difference is greater than the difference threshold, using the line current signal as the line signal; if the second signal difference is greater than the difference threshold, using the line voltage signal as the line signal.

[0008] In one embodiment, before controlling the ripple generator to generate the interference ripple signal and injecting it into the vehicle to be tested, the electromagnetic compatibility testing method during driving further includes: setting the operating state of the electrical equipment of the vehicle to be tested to a specific state; before obtaining the electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the state signal, the electromagnetic compatibility testing method during driving further includes: obtaining the current operating state of the electrical equipment of the vehicle to be tested; if the current operating state is consistent with the specific state, or the difference between the operating parameter value corresponding to the current operating state and the operating parameter value of the specific state is less than a preset difference, then determining that the state signal is normal.

[0009] In one embodiment, obtaining the electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the status signal includes: if the difference between the line signal and the interference ripple signal is less than a preset difference threshold and the status signal is normal, determining that the electromagnetic compatibility test result of the vehicle to be tested is qualified.

[0010] According to another aspect of the present application, an electromagnetic compatibility test device during driving is provided, which is arranged in an electromagnetic compatibility test system during driving, wherein the electromagnetic compatibility test system during driving includes a vehicle to be tested, a chassis dynamometer, a ripple generator and a detection device, wherein the vehicle to be tested is placed on the chassis dynamometer, the chassis dynamometer is used to monitor the operating parameters of the vehicle to be tested, the ripple generator is connected to the vehicle to be tested, the ripple generator is used to inject an interference ripple signal into the vehicle to be tested, the detection device is connected to the vehicle to be tested, and the detection device is used to detect the line signal of the vehicle to be tested under the action of the interference ripple signal; the electromagnetic compatibility test device during driving includes: a vehicle test preparation module, which is used to place the vehicle to be tested Place it on the chassis dynamometer, and set the gear of the vehicle to be tested to neutral; a vehicle position adjustment module is used to control the chassis dynamometer to operate at a low speed to adjust the stable position and posture of the vehicle to be tested on the chassis dynamometer, and fix the vehicle to be tested; a vehicle operation control module is used to control the vehicle to be tested to start and accelerate to a preset speed and then maintain a constant speed; a ripple signal injection module is used to control the ripple generator to generate the interference ripple signal and inject it into the vehicle to be tested; a feedback signal detection module is used to detect the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal; a test result generation module is used to obtain the electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the status signal.

[0011] According to another aspect of the present application, a driving electromagnetic compatibility testing system is provided, comprising: a vehicle to be tested; a chassis dynamometer, on which the vehicle to be tested is placed, and for monitoring operating parameters of the vehicle to be tested; a ripple generator, connected to the vehicle to be tested, and for injecting an interference ripple signal into the vehicle to be tested; a detection device, connected to the vehicle to be tested, and for detecting a line signal of the vehicle to be tested under the action of the interference ripple signal; and a driving electromagnetic compatibility testing device, wherein the driving electromagnetic compatibility testing device is as described above.

[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 for executing any of the above methods.

[0014] The present application provides an electromagnetic compatibility test method, device, system, medium and equipment during driving, which comprises the following steps: placing a vehicle to be tested on a chassis dynamometer and setting the gear of the vehicle to be tested to neutral; controlling the chassis dynamometer to operate at a low speed to adjust the stable position and posture of the vehicle to be tested on the chassis dynamometer, and fixing the vehicle to be tested; controlling the vehicle to be tested to start and accelerate to a preset speed and then maintain a constant speed; controlling a ripple generator to generate an interference ripple signal and inject it into the vehicle to be tested; detecting the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal; and obtaining an electromagnetic compatibility test result of the vehicle to be tested based on the line signal and status signal; that is, utilizing a chassis dynamometer and combining the steady-state operation of the vehicle to be tested to simulate the operating conditions of the vehicle to be tested, and utilizing a ripple generator to generate an interference ripple signal and inject it into the vehicle to be tested, detecting the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal, so as to obtain the electromagnetic compatibility test result of the vehicle to be tested, thereby testing the electromagnetic compatibility capability of the vehicle under the influence of the interference ripple during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other purposes, features, and advantages of the present application will become more apparent through a more detailed description of the embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are intended 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 drawings, the same reference numerals generally represent the same components or steps.

[0016] Figure 1 It is a schematic diagram of the internal structure of an electromagnetic compatibility testing system during driving provided by an exemplary embodiment of the present application.

[0017] Figure 2 It is a schematic diagram of the external structure of an electromagnetic compatibility testing system during driving provided by an exemplary embodiment of the present application.

[0018] Figure 3 It is a flowchart of an electromagnetic compatibility testing method during driving provided by an exemplary embodiment of the present application.

[0019] Figure 4 It is a structural schematic diagram of an electromagnetic compatibility testing device during driving provided by an exemplary embodiment of the present application.

[0020] Figure 5 It is a structural diagram of an electronic device provided by an exemplary embodiment of the present application.

[0021] Explanation of the accompanying symbols: 1. Vehicle to be tested; 2. Chassis dynamometer; 3. Ripple generator; 4. Testing equipment; 5. Battery pack; 6. Electric drive system; 7. Coupling transformer; 8. High-voltage differential probe; 9. Insulation support plate. DETAILED DESCRIPTION

[0022] 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 herein.

[0023] Figure 1 It is a schematic diagram of the internal structure of an electromagnetic compatibility testing system during driving provided by an exemplary embodiment of the present application. Figure 2 This is a schematic diagram of the external structure of an electromagnetic compatibility test system during driving provided by an exemplary embodiment of the present application. Figure 1 and Figure 2 As shown, the electromagnetic compatibility test system during driving includes: a vehicle to be tested 1, a chassis dynamometer 2, a ripple generator 3 and a detection device 4; wherein the vehicle to be tested 1 is placed on the chassis dynamometer 2, the chassis dynamometer 2 is used to monitor the operating parameters of the vehicle to be tested 1, the ripple generator 3 is connected to the vehicle to be tested 1, the ripple generator 3 is used to inject an interference ripple signal into the vehicle to be tested 1, the detection device 4 is connected to the vehicle to be tested 1, and the detection device 4 is used to detect the line signal of the vehicle to be tested 1 under the action of the interference ripple signal. This application uses the chassis dynamometer 2 to simulate the operating conditions of the vehicle to be tested 1, and uses the ripple generator 3 to inject an interference ripple signal into the vehicle to be tested 1 to simulate the interference ripple signal generated by the vehicle to be tested 1 during operation, and uses the detection device 4 to detect the vehicle state and parameter signals of the vehicle to be tested 1 during the test process to determine the anti-ripple interference capability of the vehicle to be tested 1.

[0024] Preferably, if Figure 1 and Figure 2 As shown, the vehicle to be tested 1 of the present application includes a battery pack 5 and an electric drive system 6, and the battery pack 5 provides the electric energy required for the operation of the electric drive system 6; the electromagnetic compatibility test system during the driving process of the present application may also include a coupling transformer 7, which connects the battery pack 5 and the electric drive system 6, and the coupling transformer 7 is connected to the ripple generator 3. The coupling transformer 7 couples the interference ripple signal generated by the ripple generator 3 and injects it into the drive circuit of the vehicle to be tested 1, that is, injects the interference ripple signal into the vehicle to be tested 1.

[0025] Preferably, if Figure 1 As shown, the detection equipment of the present application includes a current detection device and a voltage detection device, and the voltage detection device is connected to the electric drive circuit of the vehicle to be tested 1 through a high-voltage differential probe 8 to detect the current signal and voltage signal of the vehicle to be tested 1 in real time.

[0026] Preferably, if Figure 2As shown, the electromagnetic compatibility test system during driving of the present application may also include an insulating support plate 9, which is arranged below the connecting line between the vehicle to be tested 1 (specifically, the high-voltage busbar or other equipotential point of the battery pack 5 of the vehicle to be tested 1) and the coupling transformer 7 to achieve insulation between the connecting line and the ground, thereby improving the test accuracy and effect.

[0027] Figure 3 This is a flow chart of an electromagnetic compatibility test method during driving provided by an exemplary embodiment of the present application. The electromagnetic compatibility test method during driving is applied to the electromagnetic compatibility test system during driving, such as Figure 3 As shown, the electromagnetic compatibility testing method during driving includes the following steps:

[0028] Step 310: Place the vehicle to be tested on the chassis dynamometer, and set the gear position of the vehicle to be tested to neutral.

[0029] Before the test, the present application drives the vehicle to be tested onto the chassis dynamometer so that the wheels of the vehicle to be tested are placed above the chassis dynamometer, and the vehicle to be tested is set to neutral gear so that the rotation of the dynamometer drives the vehicle to be tested to rotate.

[0030] Step 320: Control the chassis dynamometer to operate at a low speed to adjust the stable position and posture of the vehicle to be tested on the chassis dynamometer, and fix the vehicle to be tested.

[0031] This application utilizes a chassis dynamometer running at low speed to adjust the vehicle posture of the vehicle to be tested to achieve a stable posture between the vehicle to be tested and the chassis dynamometer, and after the adjustment is completed, the position of the vehicle to be tested is fixed by ropes or the like.

[0032] Step 330: Control the vehicle to be tested to start and accelerate to a preset speed and then maintain a constant speed.

[0033] After the test vehicle is secured, the vehicle is driven to start and slowly accelerate to a preset speed (e.g., 50 km / h), then maintain a constant speed. The vehicle drives the chassis dynamometer to monitor the vehicle's operating status in real time. Furthermore, the chassis dynamometer can be used to simulate the frictional resistance of the test vehicle during actual operation, thereby improving the simulation accuracy of the test.

[0034] Step 340: Control the ripple generator to generate an interference ripple signal and inject it into the vehicle to be tested.

[0035] After the operating state of the vehicle to be tested is stabilized, the present application generates an interference ripple signal by controlling the ripple generator and injects it into the vehicle to be tested using a coupling transformer to simulate the interference ripple that may be generated by the vehicle to be tested during actual operation, thereby testing the safety threshold of the vehicle to be tested against the interference ripple and determining the electromagnetic interference quality of the vehicle to be tested.

[0036] Step 350: Detecting the line signal and the status signal of the vehicle to be tested under the influence of the interference ripple signal.

[0037] After injecting the interference ripple signal, the present application detects the line signal and status information of the vehicle to be tested under the action of the interference ripple signal to determine whether there is any abnormal phenomenon in the vehicle to be tested under the interference of the interference ripple signal, thereby realizing the judgment of the electromagnetic interference performance of the vehicle to be tested.

[0038] Step 360: Obtain the electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the status signal.

[0039] This application determines whether the vehicle to be tested has abnormal phenomena under the influence of the interference ripple signal based on the line signal and status signal obtained by detection, and determines the electromagnetic compatibility test result of the vehicle to be tested according to whether the abnormal phenomenon exists and the degree of the abnormal phenomenon.

[0040] The present application provides an electromagnetic compatibility testing method during driving, which comprises the following steps: placing a vehicle to be tested on a chassis dynamometer and setting the gear of the vehicle to be tested to neutral; controlling the chassis dynamometer to operate at a low speed to adjust the stable position and posture of the vehicle to be tested on the chassis dynamometer, and fixing the vehicle to be tested; controlling the vehicle to be tested to start and accelerate to a preset speed and then maintain a constant speed; controlling a ripple generator to generate an interference ripple signal and injecting it into the vehicle to be tested; detecting the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal; and obtaining an electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the status signal; that is, utilizing the chassis dynamometer and combining the steady-state operation of the vehicle to be tested to simulate the operating conditions of the vehicle to be tested, and utilizing the ripple generator to generate an interference ripple signal and injecting it into the vehicle to be tested, detecting the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal, so as to obtain the electromagnetic compatibility test result of the vehicle to be tested, thereby testing the electromagnetic compatibility capability of the vehicle under the influence of the interference ripple during operation.

[0041] In one embodiment, the detection device includes a voltage detection device, which is connected to the wiring harness of the vehicle to be tested and is used to detect the line voltage of the vehicle to be tested; wherein, before step 330, the above-mentioned electromagnetic compatibility testing method during driving may also include: controlling the ripple generator to generate a calibration ripple signal, and using the voltage detection device to detect the voltage ripple signal; based on the calibration ripple signal and the voltage ripple signal detected by the voltage detection device, performing open-circuit calibration on the electromagnetic compatibility testing system during driving.

[0042] Specifically, the voltage detection device in the present application can be an oscilloscope, which is combined with a corresponding high-voltage differential probe to realize the voltage value (i.e., line voltage) on the wiring harness of the vehicle to be tested. Before the test begins, the present application can also control the ripple generator to generate a calibration ripple signal under the load open-circuit condition, and use a voltage detection device to detect the voltage ripple signal to achieve open-circuit calibration. If the difference between the voltage ripple signal detected by the voltage detection device and the calibration ripple signal generated by the ripple generator during the open-circuit calibration is large, it means that there is an abnormality or fault in the electromagnetic compatibility test system during driving. At this time, the electromagnetic compatibility test system during driving needs to be adjusted to ensure the accuracy of the subsequent test. Specifically, the present application can use the calibration ripple signal shown in the following table for open-circuit calibration:

[0043] Table 1 Calibration ripple signal parameters

[0044]

[0045] In one embodiment, the detection device also includes a current detection device, which is connected to the wiring harness of the vehicle to be tested and is used to detect the line current of the vehicle to be tested; wherein, the specific implementation method of the above-mentioned step 350 can be: using the current detection device to detect the line current signal after the interference ripple signal is injected; using the voltage detection device to detect the line voltage signal after the interference ripple signal is injected; calculating the first signal difference between the line current signal and the interference ripple signal, and the second signal difference between the line voltage signal and the interference ripple signal; if the first signal difference and the second signal difference are both less than or equal to the preset difference threshold, then the line current signal or the line voltage signal is used as the line signal.

[0046] The current detection device in the present application can be a current probe connected to an oscilloscope, which collects the line current of the vehicle to be tested through the current probe and displays it on the oscilloscope. After using a current detection device and a voltage detection device to respectively detect the line current signal and voltage signal after the interference ripple signal is injected, the present application calculates the first signal difference between the line current signal and the interference ripple signal, and the second signal difference between the line voltage signal and the interference ripple signal to determine the difference between the line signal detected by the detection device and the interference ripple signal, so as to judge whether there are other interference signals in the wiring harness of the vehicle to be tested in addition to the interference ripple signal generated by the ripple generator. If not, the first signal difference and the second signal difference should both be less than or equal to the difference threshold. At this time, the line current signal or the circuit voltage signal can be used as the line signal, so that it can be better discovered whether there are other interference signals in the vehicle to be tested during the test process to ensure the accuracy of the test.

[0047] In one embodiment, the specific implementation of the above step 350 may be: if the first signal difference is greater than the difference threshold, the line current signal is used as the line signal; if the second signal difference is greater than the difference threshold, the line voltage signal is used as the line signal.

[0048] If it exists, it will cause the first signal difference and / or the second signal difference to be large. If the first signal difference is large, the line voltage signal is used as the line signal. Similarly, if the second signal difference is large, the line current signal is used as the line signal to reduce the impact of other interference signals on the test results.

[0049] In one embodiment, before step 340, the electromagnetic compatibility testing method during driving may further include: setting the operating state of the electrical equipment of the vehicle to be tested to a specific state; before step 360, the electromagnetic compatibility testing method during driving may further include: obtaining the current operating state of the electrical equipment of the vehicle to be tested; if the current operating state is consistent with the specific state, or the difference between the operating parameter value corresponding to the current operating state and the operating parameter value of the specific state is less than a preset difference, then determining that the status signal is normal.

[0050] Before injecting the interference ripple signal, the present application sets the operating state of the electrical equipment of the vehicle to be tested to a specific state, and obtains the current operating state of each electrical equipment in real time during the test. If the current operating state is inconsistent with the specific state, it means that the operating state of the electrical equipment has changed under the action of the interference ripple signal, and the threshold value of the anti-electromagnetic interference ability of the electrical equipment or the vehicle to be tested can be determined. If the current operating state is consistent with the specific state, or the difference between the operating parameter value corresponding to the current operating state and the operating parameter value of the specific state is less than the preset difference, it is determined that the state signal is normal, indicating that the anti-electromagnetic interference ability of the vehicle to be tested is better. Specifically, the specific state of the electrical equipment involved in this application and the criteria for judging its abnormality are as follows:

[0051] Table 2 Status signal abnormality judgment criteria

[0052]

[0053] In one embodiment, the specific implementation of the above step 360 may be: if the difference between the line signal and the interference ripple signal is less than a preset difference threshold and the status signal is normal, then determining that the electromagnetic compatibility test result of the vehicle to be tested is qualified.

[0054] If the difference between the line signal and the interference ripple signal is less than the preset difference threshold, it means that there is no other interference signal in the drive circuit of the vehicle to be tested. If the status signal of the vehicle to be tested is normal, it means that there is no abnormality in the electrical equipment of the vehicle to be tested. When the difference between the line signal and the interference ripple signal is less than the difference threshold and the status signal is normal, it can be determined that the electromagnetic compatibility test result of the vehicle to be tested is qualified.

[0055] Figure 4 Schematic diagram of the structure of the electromagnetic compatibility test device during driving provided by an exemplary embodiment of the present application. The electromagnetic compatibility test device during driving is arranged in the electromagnetic compatibility test system during driving, such as Figure 4As shown, the electromagnetic compatibility testing device 40 during the driving process includes: a vehicle test preparation module 41, which is used to place the vehicle to be tested on the chassis dynamometer and set the gear position of the vehicle to be tested to neutral; a vehicle position adjustment module 42, which is used to control the chassis dynamometer to operate at a low speed to adjust the stable position and posture of the vehicle to be tested on the chassis dynamometer, and fix the vehicle to be tested; a vehicle operation control module 43, which is used to control the vehicle to be tested to start and accelerate to a preset speed and then maintain a constant speed; a ripple signal injection module 44, which is used to control the ripple generator to generate an interference ripple signal and inject it into the vehicle to be tested; a feedback signal detection module 45, which is used to detect the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal; and a test result generation module 46, which is used to obtain the electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the status signal.

[0056] The electromagnetic compatibility testing device provided by the present application during driving is characterized in that the vehicle to be tested is placed on the chassis dynamometer through the vehicle test preparation module 41, and the gear position of the vehicle to be tested is set to neutral; the vehicle position adjustment module 42 controls the chassis dynamometer to operate at a low speed to adjust the stable position and posture of the vehicle to be tested on the chassis dynamometer, and fixes the vehicle to be tested; the vehicle operation control module 43 controls the vehicle to be tested to start and accelerate to a preset speed and then maintain a constant speed; the ripple signal injection module 44 controls the ripple generator to generate an interference ripple signal and inject it into the vehicle to be tested; the feedback signal detection module 45 detects Measure the line signal and state signal of the vehicle to be tested under the action of the interference ripple signal; the test result generation module 46 obtains the electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the state signal; that is, utilize the chassis dynamometer and combine with the steady-state operation of the vehicle to be tested to simulate the operating condition of the vehicle to be tested, and utilize the ripple generator to generate the interference ripple signal to inject into the vehicle to be tested, detect the line signal and state signal of the vehicle to be tested under the action of the interference ripple signal, so as to obtain the electromagnetic compatibility test result of the vehicle to be tested, thereby testing the electromagnetic compatibility capability of the vehicle under the influence of the interference ripple during operation.

[0057] In one embodiment, the detection equipment includes a voltage detection equipment, which is connected to the wiring harness of the vehicle to be tested and is used to detect the line voltage of the vehicle to be tested; wherein, the electromagnetic compatibility testing device 40 during the above-mentioned driving process can be further configured to: control the ripple generator to generate a calibration ripple signal, and use the voltage detection equipment to detect the voltage ripple signal; based on the calibration ripple signal and the voltage ripple signal detected by the voltage detection equipment, perform open-circuit calibration on the electromagnetic compatibility testing system during driving.

[0058] In one embodiment, the detection device also includes a current detection device, which is connected to the wiring harness of the vehicle to be tested and is used to detect the line current of the vehicle to be tested; wherein the above-mentioned feedback signal detection module 45 can be further configured as: using the current detection device to detect the line current signal after the interference ripple signal is injected; using the voltage detection device to detect the line voltage signal after the interference ripple signal is injected; calculating the first signal difference between the line current signal and the interference ripple signal, and the second signal difference between the line voltage signal and the interference ripple signal; if the first signal difference and the second signal difference are both less than or equal to the preset difference threshold, then the line current signal or the line voltage signal is used as the line signal.

[0059] In one embodiment, the feedback signal detection module 45 may be further configured to: if the first signal difference is greater than a difference threshold, use the line current signal as the line signal; if the second signal difference is greater than the difference threshold, use the line voltage signal as the line signal.

[0060] In one embodiment, during the above-mentioned driving process, the electromagnetic compatibility testing device 40 can be further configured to: set the operating state of the electrical equipment of the vehicle to be tested to a specific state; obtain the current operating state of the electrical equipment of the vehicle to be tested; if the current operating state is consistent with the specific state, or the difference between the operating parameter value corresponding to the current operating state and the operating parameter value of the specific state is less than a preset difference, then determine that the status signal is normal.

[0061] In one embodiment, the test result generating module 46 may be further configured to determine that the electromagnetic compatibility test result of the vehicle to be tested is qualified if the difference between the line signal and the interference ripple signal is less than a preset difference threshold and the status signal is normal.

[0062] Below, reference Figure 5 The electronic device according to the embodiment of the present application is described. The electronic device may be either or both of the first device and the second device, or a standalone device independent of them, and the standalone device may communicate with the first device and the second device to receive collected input signals from them.

[0063] Figure 5 The figure shows a block diagram of an electronic device according to an embodiment of the present application.

[0064] like Figure 5 As shown, the electronic device 10 includes one or more processors 11 and a memory 12 .

[0065] 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.

[0066] 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, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), a hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may execute 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, and noise components may also be stored in the computer-readable storage medium.

[0067] 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).

[0068] When the electronic device is a stand-alone device, the input device 13 may be a communication network connector, configured to receive collected input signals from the first device and the second device.

[0069] In addition, the input device 13 may also include, for example, a keyboard, a mouse, and the like.

[0070] The output device 14 can output various information to the outside, including 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.

[0071] Of course, to simplify, Figure 5 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, the electronic device 10 may further include any other appropriate components according to specific application scenarios.

[0072] 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.

[0073] The computer program product may be written in any combination of one or more programming languages ​​to implement the program code for performing the operations of the embodiments of the present application, including object-oriented programming languages ​​such as Java, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0074] In addition, an embodiment of the present application may also be a computer-readable storage medium having computer program instructions stored thereon, 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 "Exemplary Method" section of this specification.

[0075] The computer-readable storage medium may be any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples (a 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 thereof.

[0076] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0077] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0078] 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, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0079] 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 be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0080] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. The electromagnetic compatibility test method during driving is characterized by: The electromagnetic compatibility test system used in driving comprises a vehicle to be tested, a chassis dynamometer, a ripple generator, a detection device, a coupling transformer and an insulating support plate. The vehicle to be tested is placed on the chassis dynamometer, and the chassis dynamometer is used to monitor the operating parameters of the vehicle to be tested. The ripple generator is connected to the vehicle to be tested and is used to inject an interference ripple signal into the vehicle to be tested. The detection device is connected to the vehicle to be tested and is used to detect the line signal of the vehicle to be tested under the action of the interference ripple signal. The coupling transformer is connected to the ripple generator and is used to couple the interference ripple signal generated by the ripple generator into the drive circuit of the vehicle to be tested. The insulating support plate is arranged below the connecting line between the vehicle to be tested and the coupling transformer to achieve insulation between the connecting line and the ground. The electromagnetic compatibility testing method during driving includes: Placing the vehicle to be tested on the chassis dynamometer, and setting the gear position of the vehicle to be tested to neutral; Controlling the chassis dynamometer to operate at a low speed to adjust the stable position and posture of the vehicle to be tested on the chassis dynamometer, and fixing the vehicle to be tested; Controlling the vehicle to be tested to start and accelerate to a preset speed and then maintain a constant speed; Controlling the ripple generator to generate the interference ripple signal and injecting the interference ripple signal into the vehicle to be tested; detecting a line signal and a status signal of the vehicle to be tested under the action of the interference ripple signal; Obtaining an electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the status signal; The detection device includes a voltage detection device, which is connected to the wiring harness of the vehicle to be tested and is used to detect the line voltage of the vehicle to be tested; wherein, before controlling the vehicle to be tested to start and accelerate to a preset speed and then maintain a constant speed, the electromagnetic compatibility testing method during driving further includes: controlling the ripple generator to generate a calibration ripple signal, and using the voltage detection device to detect the voltage ripple signal; performing an open-circuit calibration on the electromagnetic compatibility test system during the driving process based on the calibration ripple signal and the voltage ripple signal detected by the voltage detection device; The detection device further includes a current detection device, which is connected to the wiring harness of the vehicle to be tested and is used to detect the line current of the vehicle to be tested; wherein, detecting the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal includes: Using the current detection device to detect the line current signal after the interference ripple signal is injected; Using the voltage detection device to detect the line voltage signal after the interference ripple signal is injected; calculating a first signal difference between the line current signal and the interference ripple signal, and a second signal difference between the line voltage signal and the interference ripple signal; If the first signal difference and the second signal difference are both smaller than or equal to a preset difference threshold, the line current signal or the line voltage signal is used as the line signal.

2. The electromagnetic compatibility testing method during driving according to claim 1, characterized in that: The detecting of the line signal and the state signal of the vehicle to be tested under the action of the interference ripple signal comprises: If the first signal difference is greater than the difference threshold, taking the line voltage signal as the line signal; If the second signal difference is greater than the difference threshold, the line current signal is used as the line signal.

3. The electromagnetic compatibility testing method during driving according to claim 1, characterized in that: Before controlling the ripple generator to generate the interference ripple signal and injecting the interference ripple signal into the vehicle to be tested, the electromagnetic compatibility testing method during driving further includes: Setting the operating state of the electrical equipment of the vehicle to be tested to a specific state; Before obtaining the electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the status signal, the electromagnetic compatibility test method during driving further includes: Obtaining the current operating status of the electrical equipment of the vehicle to be tested; If the current operating state is consistent with the specific state, or the difference between the operating parameter value corresponding to the current operating state and the operating parameter value of the specific state is less than a preset difference, it is determined that the state signal is normal.

4. The electromagnetic compatibility testing method during driving according to claim 3, characterized in that: Obtaining an electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the status signal includes: If the difference between the line signal and the interference ripple signal is smaller than a preset difference threshold, and the status signal is normal, it is determined that the electromagnetic compatibility test result of the vehicle to be tested is qualified.

5. The electromagnetic compatibility test device during driving is characterized by: An electromagnetic compatibility test system is provided during driving, and the electromagnetic compatibility test system during driving includes a vehicle to be tested, a chassis dynamometer, a ripple generator, a detection device, a coupling transformer and an insulating support plate. The vehicle to be tested is placed on the chassis dynamometer, and the chassis dynamometer is used to monitor the operating parameters of the vehicle to be tested. The ripple generator is connected to the vehicle to be tested and is used to inject an interference ripple signal into the vehicle to be tested. The detection device is connected to the vehicle to be tested and is used to detect the line signal of the vehicle to be tested under the action of the interference ripple signal. The coupling transformer is connected to the ripple generator and is used to couple the interference ripple signal generated by the ripple generator into the drive circuit of the vehicle to be tested. The insulating support plate is provided below the connecting line between the vehicle to be tested and the coupling transformer to achieve insulation between the connecting line and the ground. The electromagnetic compatibility testing device during driving includes: A vehicle test preparation module is used to place the vehicle to be tested on the chassis dynamometer and set the gear position of the vehicle to be tested to neutral; a vehicle position adjustment module, configured to control the chassis dynamometer to operate at a low speed so as to adjust the stable position and posture of the vehicle to be tested on the chassis dynamometer and to fix the vehicle to be tested; A vehicle operation control module is used to control the vehicle to be tested to start and accelerate to a preset speed and then maintain a constant speed; a ripple signal injection module, configured to control the ripple generator to generate the interference ripple signal and inject the interference ripple signal into the vehicle to be tested; A feedback signal detection module, configured to detect a line signal and a status signal of the vehicle to be tested under the action of the interference ripple signal; A test result generating module, configured to obtain an electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the status signal; The detection equipment includes a voltage detection device, which is connected to the wiring harness of the vehicle to be tested and is used to detect the line voltage of the vehicle to be tested; the electromagnetic compatibility test device during driving is further configured as follows: controlling the ripple generator to generate a calibration ripple signal, and using the voltage detection device to detect the voltage ripple signal; performing an open-circuit calibration on the electromagnetic compatibility test system during the driving process based on the calibration ripple signal and the voltage ripple signal detected by the voltage detection device; The detection device further includes a current detection device, which is connected to the wiring harness of the vehicle to be tested and is used to detect the line current of the vehicle to be tested; wherein the feedback signal detection module is configured as follows: Using the current detection device to detect the line current signal after the interference ripple signal is injected; Using the voltage detection device to detect the line voltage signal after the interference ripple signal is injected; calculating a first signal difference between the line current signal and the interference ripple signal, and a second signal difference between the line voltage signal and the interference ripple signal; If the first signal difference and the second signal difference are both smaller than or equal to a preset difference threshold, the line current signal or the line voltage signal is used as the line signal.

6. The electromagnetic compatibility test system during driving is characterized by: include: Vehicles to be tested; A chassis dynamometer, on which the vehicle to be tested is placed, and the chassis dynamometer is used to monitor operating parameters of the vehicle to be tested; a ripple generator, the ripple generator being connected to the vehicle to be tested and being used to inject an interference ripple signal into the vehicle to be tested; A detection device, the detection device being connected to the vehicle to be tested, and the detection device being used to detect a line signal of the vehicle to be tested under the action of the interference ripple signal; An electromagnetic compatibility testing device during driving, wherein the electromagnetic compatibility testing device during driving is as described in claim 5.

7. 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 4.

8. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the method according to any one of claims 1 to 4.

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