Electromagnetic compatibility test method, device, system, medium and equipment in driving process

Abstract

The invention provides an electromagnetic compatibility test method, device, system, medium and equipment in a driving process, and the method comprises the steps: placing a to-be-tested vehicle on a chassis dynamometer, controlling the chassis dynamometer to operate at a low speed so as to adjust the steady state of the to-be-tested vehicle on the chassis dynamometer, and controlling the to-be-tested vehicle to start and keep driving at a constant speed; controlling a ripple generator to generate an interference ripple signal and injecting the interference ripple signal into the to-be-tested vehicle; detecting a line signal and a state signal of the to-be-tested vehicle under the action of the interference ripple signal to obtain an electromagnetic compatibility test result of the to-be-tested vehicle; the method comprises the following steps: simulating the operation condition of a to-be-tested vehicle by using a chassis dynamometer and combining the steady-state operation of the to-be-tested vehicle, generating an interference ripple signal by using a ripple generator, injecting the interference ripple signal into the to-be-tested vehicle, and detecting a line signal and a state signal of the to-be-tested vehicle under the action of the interference ripple signal; therefore, the electromagnetic compatibility test result of the to-be-tested vehicle is obtained, and the electromagnetic compatibility of the to-be-tested vehicle under the influence of the interference ripples in the running process of the vehicle is tested.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic compatibility testing for new energy vehicles, and particularly to an electromagnetic compatibility testing method, device, system, medium and equipment during driving. Background Art

[0002] With the rapid growth of the production and sales volume of electric vehicles, their safety issues have also attracted much attention. The electronic and electrical components related to perception, communication, control, and entertainment carried by the vehicles have increased sharply. Under certain extreme conditions, the ripple on the vehicle may exceed the safety threshold of the entire vehicle system, which is extremely likely to affect driving safety and thus 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 periodically or continuously generated by the semiconductor periodic switching in the system. The ripple voltage is superimposed on the DC voltage. Excessive ripple voltage will not only cause serious electromagnetic interference, but also affect 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 and 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 injection of interference ripple during the operation of the entire vehicle system. Summary of the Invention

[0003] In order to solve the above technical problems, the present application is proposed. Embodiments of the present application provide an electromagnetic compatibility testing method, device, system, medium and equipment 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. The electromagnetic compatibility testing system during driving includes a vehicle to be tested, a chassis dynamometer, a ripple generator, and a detection device. 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 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 method for electromagnetic compatibility testing during driving 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 run at a low speed to adjust the stable position and attitude 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 vehicle 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 status 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 status signal.

[0005] In one embodiment, the detection device includes a voltage detection device. The voltage detection device is connected to the wire 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 vehicle speed and then maintain a constant speed, the method for electromagnetic compatibility testing 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; and performing open-circuit calibration on the electromagnetic compatibility testing system during driving based on the calibration ripple signal and the voltage ripple signal detected by the voltage detection device.

[0006] In one embodiment, the detection device further includes a current detection device. The current detection device is connected to the wire 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 the 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 injecting the interference ripple signal; using the voltage detection device to detect the line voltage signal after injecting the interference ripple signal; 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; and if both the first signal difference and the second signal difference are less than or equal to a preset difference threshold, using the line current signal or the line voltage signal as the line signal.

[0007] In one embodiment, detecting the line signal and the state signal of the vehicle under test 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 under test, the electromagnetic compatibility test method during driving further includes: setting the operating state of the electrical equipment of the vehicle under test to a specific state; before obtaining the electromagnetic compatibility test result of the vehicle under test based on the line signal and the state signal, the electromagnetic compatibility test method during driving further includes: obtaining the current operating state of the electrical equipment of the vehicle under test; 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, determining that the state signal is normal.

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

[0010] According to another aspect of the present application, there is provided an electromagnetic compatibility test device during driving, which is arranged in an electromagnetic compatibility test system during driving. The electromagnetic compatibility test system during driving includes a vehicle to be tested, a chassis dynamometer, a ripple generator, and a detection device. 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, and 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 on the chassis dynamometer and set the gear of the vehicle to be tested to neutral; a vehicle position adjustment module, which is used to control the chassis dynamometer to run at a low speed to adjust the stable position and attitude of the vehicle to be tested on the chassis dynamometer and fix the vehicle to be tested; a vehicle operation control module, which is used to control the vehicle to be tested to start and accelerate to a preset vehicle speed and then maintain a constant speed; a ripple signal injection module, which 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, 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; a test result generation module, 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.

[0011] According to another aspect of the present application, there is provided an electromagnetic compatibility test system during driving, including: a vehicle to be tested; a chassis dynamometer, on which the vehicle to be tested is placed, and the chassis dynamometer is used to monitor the operating parameters of the vehicle to be tested; a ripple generator, which is connected to the vehicle to be tested, and the ripple generator is used to inject an interference ripple signal into the vehicle to be tested; a detection device, which 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; an electromagnetic compatibility test device during driving, and the electromagnetic compatibility test device during driving is as described above.

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

[0013] According to another aspect of the present application, there is provided an electronic device, including: a processor; a memory for storing executable instructions of the processor; and the processor is used to execute the method described in any one of the above.

[0014] The electromagnetic compatibility testing method, device, system, medium and equipment provided in this application, by placing the 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 run at a low speed to adjust the stable position and attitude 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 vehicle 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; obtaining the electromagnetic compatibility test result of the vehicle to be tested based on the line signal and status signal; that is, using the chassis dynamometer and combining with the steady-state operation of the vehicle to be tested to simulate the operating conditions of the vehicle to be tested, and using 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, so as to obtain the electromagnetic compatibility test result of the vehicle to be tested, thereby testing the electromagnetic compatibility ability of the vehicle during operation under the influence of interference ripples. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By describing the embodiments of the present application in more detail with reference to the accompanying drawings, the above and other objects, features and advantages of the present application will become more obvious. 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 to the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

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

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

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

[0019] Figure 4 It is a schematic structural 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] Description of the reference numerals: 1, vehicle to be tested; 2, chassis dynamometer; 3, ripple generator; 4, detection device; 5, battery pack; 6, electric drive system; 7, coupling transformer; 8, high-voltage differential probe; 9, insulating support plate. Detailed Implementation Manner

[0022] Next, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. It should be understood that the present application is not limited by the exemplary embodiments described herein.

[0023] Figure 1 is a schematic internal structure diagram of an electromagnetic compatibility test system during driving provided by an exemplary embodiment of the present application. Figure 2 is a schematic external structure diagram of an electromagnetic compatibility test system during driving provided by an exemplary embodiment of the present application. As Figure 1 and Figure 2 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, and 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, and 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. The present 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 during the operation of the vehicle to be tested 1, and uses the detection device 4 to detect the vehicle state and parameter signals, etc. of the vehicle to be tested 1 during the test to determine the anti-ripple interference ability of the vehicle to be tested 1.

[0024] Preferably, as Figure 1 and Figure 2 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 driving of the present application may further include a coupling transformer 7, the coupling transformer 7 is connected to the battery pack 5 and the electric drive system 6, and the coupling transformer 7 is connected to the ripple generator 3, and the coupling transformer 7 couples and injects the interference ripple signal generated by the ripple generator 3 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, as Figure 1 shown, the detection device of the present application includes a current detection device and a voltage detection device, and the voltage detection device accesses 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, as Figure 2As shown in the figure, the electromagnetic compatibility test system during the driving process of the present application may further include an insulating support plate 9. The insulating support plate 9 is arranged below the connecting line between the vehicle to be tested 1 (specifically, the high-voltage bus or other equipotential points 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 FIG. is a schematic flowchart of an electromagnetic compatibility test method during the driving process provided by an exemplary embodiment of the present application. This electromagnetic compatibility test method during the driving process is applied to the above-mentioned electromagnetic compatibility test system during the driving process, as Figure 3 shown, this electromagnetic compatibility test method during the driving process includes the following steps: Step 310: Place the vehicle to be tested on the chassis dynamometer and set the gear of the vehicle to be tested to neutral.

[0028] Before the test of the present application, drive 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 set the vehicle to be tested to neutral to enable the dynamometer to drive the vehicle to rotate when it rotates.

[0029] Step 320: Control the chassis dynamometer to run at a low speed to adjust the stable position and attitude of the vehicle to be tested on the chassis dynamometer, and fix the vehicle to be tested.

[0030] The present application uses the chassis dynamometer to run at a low speed to adjust the vehicle attitude of the vehicle to be tested to achieve a stable attitude between the vehicle to be tested and the chassis dynamometer. After the adjustment is completed, fix the position of the vehicle to be tested with ropes or the like.

[0031] Step 330: Control the vehicle to be tested to start and accelerate to a preset vehicle speed and then maintain a constant speed.

[0032] After the vehicle to be tested is fixed, control the vehicle to be tested to start and slowly accelerate to a preset vehicle speed (such as 50 km / h) and then maintain a constant speed by driving the vehicle to be tested, and drive the chassis dynamometer to rotate through the vehicle to be tested to monitor the running state of the vehicle to be tested in real time. And the present application can also use the chassis dynamometer to simulate the frictional resistance and the like of the vehicle to be tested during the actual operation process to improve the simulation accuracy of the test.

[0033] Step 340: Control the ripple generator to generate an interference ripple signal and inject it into the vehicle to be tested.

[0034] After the operating state of the vehicle under test is stable, the present application controls a ripple generator to generate an interference ripple signal, and injects the interference ripple signal into the vehicle under test by using a coupling transformer, so as to simulate the interference ripple that may be generated during the actual operation of the vehicle under test, thereby testing the safety threshold of the vehicle under test against the interference ripple and determining the electromagnetic interference quality of the vehicle under test.

[0035] Step 350: Detect the line signal and the status signal of the vehicle under test under the action of the interference ripple signal.

[0036] After injecting the interference ripple signal, the present application detects the line signal and the status information of the vehicle under test under the action of the interference ripple signal to determine whether there are any abnormal phenomena in the vehicle under test under the interference of the interference ripple signal, thereby realizing the determination of the electromagnetic interference performance of the vehicle under test.

[0037] Step 360: Obtain the electromagnetic compatibility test result of the vehicle under test based on the line signal and the status signal.

[0038] The present application determines whether there are any abnormal phenomena in the vehicle under test under the action of the interference ripple signal based on the detected line signal and status signal, and determines the electromagnetic compatibility test result of the vehicle under test according to the presence or absence of abnormal phenomena and the degree of abnormal phenomena.

[0039] The electromagnetic compatibility test method provided by the present application places the vehicle under test on a chassis dynamometer, and sets the gear of the vehicle under test to neutral; controls the chassis dynamometer to run at a low speed to adjust the stable position and attitude of the vehicle under test on the chassis dynamometer, and fixes the vehicle under test; controls the vehicle under test to start and accelerate to a preset vehicle speed and then maintain a constant speed; controls the ripple generator to generate an interference ripple signal and inject it into the vehicle under test; detects the line signal and the status signal of the vehicle under test under the action of the interference ripple signal; obtains the electromagnetic compatibility test result of the vehicle under test based on the line signal and the status signal; that is, uses the chassis dynamometer and combines the steady-state operation of the vehicle under test to simulate the operating conditions of the vehicle under test, and uses the ripple generator to generate an interference ripple signal and inject it into the vehicle under test, and detects the line signal and the status signal of the vehicle under test under the action of the interference ripple signal to obtain the electromagnetic compatibility test result of the vehicle under test, thereby testing the electromagnetic compatibility ability of the vehicle during operation under the influence of interference ripples.

[0040] In one embodiment, the detection device includes a voltage detection device. The voltage detection device 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. Among them, before step 330, the above electromagnetic compatibility test method during driving may further include: controlling a 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 test system during driving.

[0041] Specifically, the voltage detection device in the present application may be an oscilloscope. The oscilloscope is combined with a corresponding high-voltage differential probe to achieve the voltage value (i.e., the line voltage) on the wiring harness of the vehicle to be tested. Before the test starts, the present application may also control the ripple generator to generate a calibration ripple signal under the condition of an open load, and use the 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 is large during the open-circuit calibration, it indicates that there are abnormalities or faults in the electromagnetic compatibility test system during driving. At this time, it is necessary to adjust the electromagnetic compatibility test system during driving to ensure the accuracy of subsequent tests. Specifically, the present application may perform open-circuit calibration using the calibration ripple signal shown in the following table: Table 1 Calibration Ripple Signal Parameters

[0042] In one embodiment, the detection device further includes a current detection device. The current detection device 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. Among them, the specific implementation manner of the above step 350 may be: using the current detection device to detect the line current signal after injecting the interference ripple signal; using the voltage detection device to detect the line voltage signal after injecting the interference ripple signal; 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 both the first signal difference and the second signal difference are less than or equal to a preset difference threshold, then use the line current signal or the line voltage signal as the line signal.

[0043] The current detection device in this application can be a current probe connected to an oscilloscope. The line current of the vehicle to be tested is collected by the current probe and displayed on the oscilloscope. After this application uses the current detection device and the voltage detection device to detect the line current signal and the voltage signal after injecting the interference ripple signal respectively, by 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, 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 wire harness of the vehicle to be tested except 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 as to better detect whether there are other interference signals during the test of the vehicle to be tested and ensure the accuracy of the test.

[0044] In one embodiment, the specific implementation of the above step 350 can 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.

[0045] If there is, 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 influence of other interference signals on the test result.

[0046] In one embodiment, before step 340, the above electromagnetic compatibility test method during driving can further include: setting the operating state of the electrical equipment of the vehicle to be tested to a specific state; before step 360, the above electromagnetic compatibility test method during driving can further include: obtaining the current operating state of the electrical equipment of the vehicle to be tested; if the current operating state is the same as 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.

[0047] Before injecting the interfering 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 indicates that the operating state of the electrical equipment has changed under the action of the interfering ripple signal, and then the threshold value of the electromagnetic interference resistance 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 status signal is normal, indicating that the electromagnetic interference resistance of the vehicle to be tested is relatively good. Specifically, the specific state of the electrical equipment involved in the present application and the criteria for judging its abnormality are as follows in the table: Table 2 Abnormality determination criteria table for status signals

[0048] In one embodiment, the specific implementation manner of the above step 360 may be: if the difference between the line signal and the interfering ripple signal is less than the 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.

[0049] If the difference between the line signal and the interfering ripple signal is less than the preset difference threshold, it indicates that there are no other interfering signals in the drive circuit of the vehicle to be tested. If the status signal of the vehicle to be tested is normal, it indicates that no abnormal phenomena have occurred in the electrical equipment of the vehicle to be tested. When the difference between the line signal and the interfering 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.

[0050] Figure 4 is a schematic structural diagram of an 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 above-mentioned electromagnetic compatibility test system during driving, such as Figure 4 shown, the electromagnetic compatibility test device 40 during driving includes: a vehicle test preparation module 41 for placing the vehicle to be tested on a chassis dynamometer and setting the gear of the vehicle to be tested to neutral; a vehicle position adjustment module 42 for controlling the chassis dynamometer to run at a low speed to adjust the stable position and attitude of the vehicle to be tested on the chassis dynamometer and fixing the vehicle to be tested; a vehicle operation control module 43 for controlling the vehicle to be tested to start and accelerate to a preset vehicle speed and then maintain a constant speed; a ripple signal injection module 44 for controlling a ripple generator to generate an interfering ripple signal and injecting it into the vehicle to be tested; a feedback signal detection module 45 for detecting the line signal and status signal of the vehicle to be tested under the action of the interfering ripple signal; a test result generation module 46 for obtaining the electromagnetic compatibility test result of the vehicle to be tested based on the line signal and status signal.

[0051] The electromagnetic compatibility test device during driving provided by this application places the vehicle to be tested on a chassis dynamometer through the vehicle test preparation module 41, and sets the gear of the vehicle to be tested to neutral; the vehicle position adjustment module 42 controls the chassis dynamometer to run at a low speed to adjust the stable position and attitude 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 vehicle 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 the line signal and status 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 status signal; that is, it 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, and detects the line signal and status signal of the vehicle to be tested under the action of the interference ripple signal to obtain the electromagnetic compatibility test result of the vehicle to be tested, so as to test the electromagnetic compatibility ability of the vehicle during operation under the influence of interference ripples.

[0052] In one embodiment, the detection device includes a voltage detection device, and the voltage detection device is connected to the wiring harness of the vehicle to be tested for detecting the line voltage of the vehicle to be tested; wherein, the above-mentioned electromagnetic compatibility test device 40 during driving can be further configured to: control the ripple generator to generate a calibration ripple signal, and use 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, perform open-circuit calibration on the electromagnetic compatibility test system during driving.

[0053] In one embodiment, the detection device further includes a current detection device, and the current detection device is connected to the wiring harness of the vehicle to be tested for detecting the line current of the vehicle to be tested; wherein, the above-mentioned feedback signal detection module 45 can be further configured to: use the current detection device to detect the line current signal after injecting the interference ripple signal; use the voltage detection device to detect the line voltage signal after injecting the interference ripple signal; calculate 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 both the first signal difference and the second signal difference are less than or equal to a preset difference threshold, then use the line current signal or the line voltage signal as the line signal.

[0054] In one embodiment, the above-mentioned feedback signal detection module 45 can be further configured to: if the first signal difference is greater than the difference threshold, then use the line current signal as the line signal; if the second signal difference is greater than the difference threshold, then use the line voltage signal as the line signal.

[0055] In one embodiment, the electromagnetic compatibility test device 40 during the driving process may 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 the same as 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, determine that the status signal is normal.

[0056] In one embodiment, the above-mentioned test result generation module 46 may be further configured to: 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, determine that the electromagnetic compatibility test result of the vehicle to be tested is qualified.

[0057] Next, with reference to Figure 5 an electronic device according to an embodiment of the present application will be described. The electronic device may be either 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 input signals collected from them.

[0058] Figure 5 The block diagram of the electronic device according to the embodiment of the present application is illustrated.

[0059] As Figure 5 shown, the electronic device 10 includes one or more processors 11 and a memory 12.

[0060] The processor 11 may be a central processing unit (CPU) or other forms of processing units with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.

[0061] The memory 12 may include one or more computer program products, and the computer program products 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, etc. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage media, 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, and noise components may also be stored in the computer-readable storage media.

[0062] In one example, the electronic device 10 may further include: an input device 13 and an output device 14, and these components are interconnected through a bus system and / or other forms of connection mechanisms (not shown).

[0063] When the electronic device is a stand-alone device, the input device 13 can be a communication network connector for receiving the collected input signals from the first device and the second device.

[0064] In addition, the input device 13 can also include, for example, a keyboard, a mouse, and so on.

[0065] 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, and a communication network and its connected remote output devices, and so on.

[0066] Of course, for simplicity, Figure 5 only some of the components of the electronic device 10 related to this application are shown in the figure, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application scenarios, the electronic device 10 can also include any other appropriate components.

[0067] In addition to the above methods and devices, an embodiment of the present application can also be a computer program product, which includes computer program instructions that, when run by a processor, cause the processor to execute the steps in the methods according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0068] The computer program product can be written in any combination of one or more programming languages to write program code for performing the operations of the embodiments of the present application. The programming languages include object-oriented programming languages such as Java, C++, etc., and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed completely on the user's computing device, partially on the user's device, executed as an independent software package, partially on the user's computing device and partially on a remote computing device, or completely executed on a remote computing device or server.

[0069] In addition, an embodiment of the present application can also be a computer-readable storage medium, on which computer program instructions are stored, and the computer program instructions, when run by a processor, cause the processor to execute the steps in the methods according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0070] The computer-readable storage medium may adopt any combination of one or more readable media. The readable media 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, apparatus, or device, or any combination of the above. More specific examples (a non-exhaustive list) of the readable storage medium 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.

[0071] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for illustrative and easy-to-understand purposes, rather than limitations. These details do not limit the present application to necessarily adopt the above specific details for implementation.

[0072] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present application are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open-ended words, meaning "including but not limited to", and can be used interchangeably with each other. The word "or" and "and" used herein refer to the word "and / or", and can be used interchangeably with each other, 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 with each other.

[0073] It should also be noted that in the devices, equipment, and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present application.

[0074] The above description of the disclosed aspects enables any person skilled in the art to make or use the present application. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can 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 broadest scope consistent with the principles and novel features disclosed herein.

[0075] The foregoing description has been presented for purposes of illustration and description. In addition, this description is not intended to limit embodiments of the present application to the form disclosed herein. Although several example aspects and embodiments have been discussed above, those skilled in the art will recognize some of their variations, modifications, alterations, additions, and subcombinations.

Claims

1. The electromagnetic compatibility test method during driving is characterized by: Applicable to an electromagnetic compatibility test system during driving, the electromagnetic compatibility test system during driving comprises a vehicle to be tested, a chassis dynamometer, a ripple generator and a detection device, 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 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 keep traveling at 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 the line signal and the state signal of the vehicle to be tested under the action of the interference ripple signal; Based on the line signal and the state signal, an electromagnetic compatibility test result of the vehicle to be tested is obtained.

2. The electromagnetic compatibility testing method during driving according to claim 1, characterized in that: 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 the vehicle to be tested is controlled to start and accelerate to a preset speed and then maintain a constant speed, the electromagnetic compatibility test 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, an open-circuit calibration is performed on the electromagnetic compatibility test system during the driving process.

3. The electromagnetic compatibility testing method during driving according to claim 2, characterized in that: 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 detection of the line signal and the state 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.

4. The electromagnetic compatibility testing method during driving according to claim 3, 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 current signal 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.

5. 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 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 test method during driving further includes: Acquiring 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.

6. The electromagnetic compatibility testing method during driving according to claim 5, characterized in that: The obtaining of the electromagnetic compatibility test result of the vehicle to be tested based on the line signal and the state signal includes: If the difference between the line signal and the interference ripple signal is smaller than a preset difference threshold, and the state signal is normal, it is determined that the electromagnetic compatibility test result of the vehicle to be tested is qualified.

7. The electromagnetic compatibility test device during driving is characterized by: An electromagnetic compatibility test system is provided during driving, wherein the electromagnetic compatibility test system during driving comprises 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 device during driving includes: A vehicle test preparation module, used for placing the vehicle to be tested on the chassis dynamometer and setting the gear position of the vehicle to be tested to neutral; A vehicle position adjustment module, used for 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 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, used for controlling the ripple generator to generate the interference ripple signal and injecting it into the vehicle to be tested; A feedback signal detection module, used to detect the line signal and state signal of the vehicle to be tested under the action of the interference ripple signal; The test result generating 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.

8. 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 the operating parameters of the vehicle to be tested; A ripple generator, the ripple generator is connected to the vehicle to be tested, and the ripple generator is used to inject an interference ripple signal into the vehicle to be tested; A detection device, 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; An electromagnetic compatibility testing device during driving, wherein the electromagnetic compatibility testing device during driving is as described in claim 7.

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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