Electromagnetic compatibility testing method, device and computer equipment for circuit system

Abstract

The present application relates to an electromagnetic compatibility testing method, device, computer equipment and storage medium. The method includes: performing radiation emission tests on the circuit system based on different power gears, and determining the target candidate controller connected to the power network in the circuit system according to the excessive signal of the radiation emission test; disconnecting the power supply path between the target candidate controller and the power network, and supplying the target candidate controller with a separate power supply; performing radiation emission tests and obtaining test results for the power-on and power-off states of the target candidate controller respectively; and determining the excessive interference source of the circuit system according to the corresponding test results under the power-on and power-off states. This method can accurately locate the source of the excessive signal of the entire vehicle, so as to guide the developers to make rectifications for specific excessive parts.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to an electromagnetic compatibility testing method, device and computer equipment for a circuit system. Background Art

[0002] At present, with the deepening of vehicle intelligence and electrification, the number of vehicle electronic and electrical controllers has gradually increased, and the electromagnetic compatibility problems of vehicles have also increased. The electromagnetic compatibility test of the whole vehicle is an important item of the automobile announcement test and is a vehicle production requirement that all major vehicle manufacturers need to comply with.

[0003] The vehicle electromagnetic compatibility radiation emission test is an important inspection item in the announcement. The reference standard is the national standard GB34660. All vehicle manufacturers usually use this standard to control the radiation emission performance of the vehicle during the research and development stage. During the development stage, it is inevitable that various types of vehicle radiation emissions will exceed the standard. The common treatment method is to locate the interference source on the vehicle and then carry out problem rectification for specific equipment that exceeds the standard. The common method for locating the exceeding point is to first scan the radiation emission of the vehicle, isolate the possible interference sources identified on the vehicle in turn by disconnecting the fuse, put it in a power-off state, and then scan the radiation emission of the vehicle again.

[0004] The above methods can play a role in preliminarily locating the parts of the vehicle circuit system where the radiation emission exceeds the standard. However, the vehicle electrical system is a complex and large network. A single electrical device has various communication connections with other devices. If a single controller (such as the body controller) is disconnected from the power network, other devices in the related system may malfunction or even fail to work (such as sensors powered by the body controller). This may lead to misjudgment when locating the parts that exceed the standard, increase the rectification cost and cycle, and even affect the discovery of the real source of interference exceeding the standard. Summary of the invention

[0005] Based on this, it is necessary to provide a method and device that can test the electromagnetic compatibility issues of the entire vehicle circuit system in response to the above technical problems.

[0006] A method for testing electromagnetic compatibility problems of a circuit system, the method comprising:

[0007] Performing radiation emission tests on the circuit system based on different power gears for the whole vehicle, and determining a target candidate controller connected to a power network in the circuit system according to an excessive signal of the radiation emission test, wherein the target candidate controller is a controller that causes an excessive electromagnetic compatibility signal;

[0008] Disconnecting the power supply path between the target candidate controller and the power supply network, and supplying power to the target candidate controller with a separate power supply;

[0009] For each of the target candidate controllers, a radiation emission test is performed based on the power-on state and the power-off state of the separate power supply and a test result is obtained;

[0010] The excessive interference source of the vehicle circuit system is determined according to the corresponding test results in the power-on state and the power-off state.

[0011] In one embodiment, the test result includes the presence of an excessive signal and the absence of an excessive signal, and determining the excessive interference source of the vehicle circuit system according to the corresponding test results in the power-on state and the power-off state includes:

[0012] If the test results of the target candidate controller in both the power-off state and the power-on state show that there is no excessive signal, then it is determined that the excessive interference source is the power supply network in the circuit system;

[0013] If the test result shows that there is no exceeding signal when the target candidate controller is in the power-off state, and the test result shows that there is exceeding signal when the target candidate controller is in the power-on state, then it is determined that the interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller.

[0014] In one embodiment, if the target candidate controller is in a powered-on state and the test result is that there is an over-limit signal, the method further includes:

[0015] Disconnecting the communication path between the target candidate controller and all downstream secondary controllers, and simulating the load and network communication nodes of the target candidate controller to enable the target candidate controller to work normally;

[0016] Detecting whether there is an over-standard signal based on the target candidate controller being powered on and operating normally;

[0017] According to the test result, it is determined that the excessive interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller.

[0018] In one embodiment, the test result includes the presence of the exceeding signal and the absence of the exceeding signal, wherein determining, according to the test result, that the exceeding interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller includes:

[0019] If the test result shows that there is an excessive signal, determining the target candidate controller as the interference source;

[0020] If the test result shows that there is no exceeding-standard signal, the downstream secondary controller is determined to be the interference source.

[0021] In one embodiment, the number of the downstream secondary controllers connected to the target candidate controller is multiple, and if the exceeding signal does not exist, determining that the downstream secondary controller is the interference source includes:

[0022] Supplying power to each of the downstream secondary controllers separately in turn;

[0023] Performing radiation emission tests on the power-on state and the power-off state of each of the downstream secondary controllers respectively;

[0024] If the radiation emission test exceeding signal of the candidate downstream secondary controller exists when the candidate downstream secondary controller is powered on, and the exceeding signal does not exist when the candidate downstream secondary controller is powered off, the candidate downstream secondary controller is determined to be the interference source, wherein the candidate downstream secondary controller is one of the multiple downstream secondary controllers.

[0025] In one of the embodiments, if the exceeding-standard signal does not exist when the target candidate controller is in a power-off state and a power-on state, other untested controllers on the circuit system are powered by a separate power supply, and a radiation emission test is performed based on the power-on and power-off of the other untested controllers to re-determine the target candidate controller.

[0026] In one embodiment, the different power gears include at least three gears: off, accessory on, and on. In each power gear, the number of controllers connected to the power network is different, wherein the target candidate controller is one of the multiple controllers.

[0027] In one embodiment, performing a radiation emission test on the circuit system based on different power levels, and determining a target candidate controller connected to a power network in the circuit system according to an over-limit signal of the radiation emission test, includes:

[0028] Performing a radiation emission test on the circuit system based on the closed gear;

[0029] If there is an over-limit signal in the closing gear, the separate power supply is sequentially turned on or off for each of the first candidate controllers in the closing gear, so as to determine the target candidate controller from a plurality of first candidate controllers corresponding to the closing gear;

[0030] If there is no exceeding signal in the closing gear, the target candidate controller is determined from the controller corresponding to the accessory connecting gear or the controller corresponding to the connecting gear.

[0031] In one embodiment, the determining the target candidate controller from the controller corresponding to the accessory switch-on gear position or the controller corresponding to the switch-on gear position comprises:

[0032] Performing a radiated emission test on the circuit system based on the accessory on profile;

[0033] If there is an over-standard signal in the accessory gear, a second candidate controller newly added in the accessory on gear relative to the off gear is selected;

[0034] The separate power supply is sequentially turned on or off for each of the second-selected controllers in the accessory-on gear to determine the target candidate controller from among the second candidate controllers.

[0035] In one embodiment, if there is no over-limit signal in the accessory-on gear, the method further includes:

[0036] Performing a radiation emission test on the circuit system based on the on-mode;

[0037] If there is an over-standard signal in the on-shift gear, a third candidate controller newly added in the on-shift gear relative to the accessory on-shift gear is selected;

[0038] The separate power supply is sequentially turned on or off for each of the third candidate controllers in the on gear to determine the target candidate controller from the third candidate controllers.

[0039] An electromagnetic compatibility testing device for a circuit system, the device comprising:

[0040] A test module, used to perform a radiation emission test on the circuit system based on different power gears of the vehicle, and determine a target candidate controller connected to the power network in the circuit system according to an excessive signal of the radiation emission test, wherein the target candidate controller is a controller that causes an excessive electromagnetic compatibility signal;

[0041] An independent power supply module, used to disconnect the power supply path between the target candidate controller and the power supply network, and to supply power to the target candidate controller with an independent power supply;

[0042] A signal acquisition module, used for performing a radiation emission test on each of the target candidate controllers based on the power-on and power-off states of the separate power supply and obtaining a test result;

[0043] The determination module is used to determine the excessive interference source of the vehicle circuit system according to the corresponding test results in the power-on state and the power-off state.

[0044] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and is characterized in that the processor implements the steps of the electromagnetic compatibility testing method when executing the computer program.

[0045] A computer-readable storage medium stores a computer program, wherein the computer program implements the steps of the electromagnetic compatibility testing method when executed by a processor.

[0046] The above-mentioned electromagnetic compatibility test method, device, computer equipment and storage medium, through performing radiation emission test on the whole vehicle based on different power gears and preliminarily determining the target candidate controller, powering the target candidate controller separately, performing radiation emission test on the power-on and power-off states respectively and detecting whether there is an excessive signal, can determine whether the target candidate controller is the excessive interference source of the whole vehicle based on the excessive signal and the power-on and power-off states, thereby achieving the effect of accurately locating the source of the excessive signal of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 An application environment diagram of an electromagnetic compatibility testing method in an embodiment;

[0048] Figure 2 A schematic diagram of the flow of electromagnetic compatibility test steps in one embodiment;

[0049] Figure 3 A schematic diagram of the flow of electromagnetic compatibility test steps in one embodiment;

[0050] Figure 4 A schematic diagram of the flow of electromagnetic compatibility test steps in one embodiment;

[0051] Figure 5 A schematic diagram of the flow of electromagnetic compatibility test steps in one embodiment;

[0052] Figure 6 A schematic diagram of the flow of electromagnetic compatibility test steps in one embodiment;

[0053] Figure 7 A schematic diagram of the flow of electromagnetic compatibility test steps in one embodiment;

[0054] Figure 8 A schematic diagram of the flow of electromagnetic compatibility test steps in one embodiment;

[0055] Fig. 9 is a structural block diagram of an electromagnetic compatibility testing device in one embodiment;

[0056] Fig.10 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0058] The electromagnetic compatibility test method provided in this application can be applied to Figure 1 In the circuit system shown. The circuit system can be applied to all applicable scenarios such as automobiles, and the circuit system includes a power supply network 100, a target candidate controller 102, a secondary downstream controller 104 connected to the target candidate controller, and a battery 106. Among them, the power supply network 100 can be a vehicle power supply network; the target candidate controller 102 can be a controller directly connected to the vehicle power supply network, such as a body controller, and can also be further confirmed as a downstream controller powered by the controller secondary power; the secondary downstream controller 104 connected to the target candidate controller can be a sensor, various window and door lock actuators, air conditioners, headlights and other systems; the battery 106 is a battery consistent with the actual vehicle power supply, which is used to independently power the target candidate controller.

[0059] In one embodiment, Figure 2 As shown, an electromagnetic compatibility test method is provided, which is applied to Figure 1 The circuit system in is taken as an example to illustrate, including steps 202 to 208.

[0060] Step 202, performing a radiation emission test on the circuit system based on different power levels of the vehicle, and determining a target candidate controller connected to the power network in the circuit system according to an exceeding signal of the radiation emission test, wherein the target candidate controller is a controller that causes an exceeding electromagnetic compatibility signal.

[0061] Among them, all electrical devices on the vehicle may have electromagnetic compatibility problems. The problem of exceeding the standard may come from the controller, or the interference signal generated by a certain electrical device may be amplified and emitted through the vehicle wiring harness, causing the signal to exceed the standard. The whole vehicle contains several different gears, and the controller powered on in each gear is different. The whole vehicle is tested for radiation emission in different gears and whether there is an excessive signal. The target candidate controller that causes the excessive signal can be preliminarily determined. Among them, the excessive signal can be obtained through the test equipment during the radiation emission test.

[0062] Step 204: disconnect the power supply path between the target candidate controller and the power network, and supply power to the target candidate controller with a separate power supply.

[0063] Among them, the interference signal that causes the exceeding of the standard may be on the power supply network, and may be very small and not enough to cause the exceeding of the standard. If it crosstalks to the target candidate controller, it may cause signal amplification through coupling or power supply loop, causing the interference signal to become larger, and then causing the exceeding of the standard. It may also be on the target candidate controller. A separate power supply can isolate the target candidate controller from the power supply network.

[0064] Among them, the separate power supply needs to select the corresponding DC regulated power supply according to the actual power supply voltage, and the power supply needs to meet the electromagnetic compatibility test noise floor requirements. The separate power supply is consistent with the actual vehicle power supply, for example, 12V for passenger cars and 24V for commercial vehicles, so as to ensure the normal operation of the target candidate controller while supplying it with a separate power supply.

[0065] Step 206 , performing a radiation emission test on each of the target candidate controllers based on the on / off status of the individual power supplies and obtaining a test result.

[0066] The separate power supply is provided with a switch to control the power on or off of the target candidate controller. The target candidate controller has different effects on the vehicle radiation emission test when it is powered on or off. The test can be performed based on its power on or off state to detect the presence of excessive signals in the two states. The excessive signal is a signal that exceeds the standard limit requirements in the vehicle radiation emission test.

[0067] Step 208, determining the excessive interference source of the vehicle circuit system according to the corresponding test results in the power-on and power-off states.

[0068] By combining the power-on and power-off status with the acquisition of the exceeding-standard signal, it is possible to analyze whether the target candidate controller is the source of the exceeding-standard signal of the entire vehicle.

[0069] In this embodiment, by performing a radiation emission test on the entire vehicle based on different power levels and preliminarily determining the target candidate controller, the target candidate controller is powered separately, and radiation emission tests are performed on its power-on and power-off states respectively to detect whether an excessive signal exists. Based on the excessive signal and the power-on and power-off states, it can be determined whether the target candidate controller is the excessive interference source of the entire vehicle, thereby achieving the effect of accurately locating the source of the excessive signal of the entire vehicle.

[0070] In one embodiment, the test result includes the presence of an excessive signal and the absence of an excessive signal, and determining the excessive interference source of the vehicle circuit system according to the corresponding test results in the power-on state and the power-off state includes:

[0071] If the target candidate controller is in a power-off state and a power-on state, and the test results show that there is no excessive signal, it is determined that the excessive interference source is the power supply network in the circuit system.

[0072] The target candidate controller is in the power-off state and the power-on state, and there is no exceeding-standard signal in the test results, which means that the exceeding-standard signal may come from the vehicle power network, but the loop between the power network and the target candidate controller is cut off, resulting in the exceeding-standard signal not being emitted. There is no problem with the target candidate controller itself.

[0073] If the target candidate controller is in a power-off state, the test result is that there is no exceeding-standard signal, and if the target candidate controller is in a power-on state, the test result is that there is an exceeding-standard signal, then it is determined that the interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller.

[0074] In this embodiment, by analyzing the corresponding test results in the power-on state and the power-off state of the target candidate controller, the effect of preliminarily confirming the interference source is achieved.

[0075] In one embodiment, Figure 3 As shown, if the target candidate controller is in a powered-on state and the test result is that there is an over-limit signal, the method further includes steps 302 to 306:

[0076] Step 302 , disconnect the communication path between the target candidate controller and all downstream secondary controllers, and simulate the load and network communication nodes of the target candidate controller to enable the target candidate controller to work normally.

[0077] If the exceeding signal still exists when the target candidate controller is powered on, it indicates that the exceeding signal does not originate from the vehicle power network, and the exceeding signal is related to the target candidate controller, and the target candidate controller and its downstream secondary controller are further detected.

[0078] All secondary controllers connected downstream of the target candidate controller are disconnected to eliminate interference from the downstream secondary controllers. Wherein, there are analog loads or digital communication signals on the downstream circuit of the target candidate controller, such as digital signal input, vehicle controller local area network (Controller Area Network, CAN) communication or local interconnect network (Local Interconnect Network, LIN) communication, and it is necessary to build simulated loads and communication networks to ensure their normal operation. Wherein, the simulated load can be realized by external resistors, external pull-up resistors, pull-down resistors, etc., and the communication network node can be connected to the CAN / LIN communication simulation host computer through a CAN / LIN optical bridge for communication simulation.

[0079] Step 304 , detecting whether the exceeding-standard signal exists based on the target candidate controller being powered on and working normally.

[0080] Among them, a switch is provided on the separate power supply. When the separate power supply is connected to the target candidate controller and the switch is turned on, the target candidate controller is in a powered-on state. After the target candidate controller is disconnected from the downstream secondary controller, its load and network communication nodes are simulated to ensure that it is in normal working condition.

[0081] Step 306: Determine, based on the test result, that the excessive interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller.

[0082] A test is performed on a target candidate controller that is in a normal working state and powered on, and based on the test result, it can be analyzed and determined whether the interference source comes from the target candidate controller itself.

[0083] In one embodiment, the test result includes the presence of the exceeding signal and the absence of the exceeding signal, wherein determining the exceeding interference source as the target candidate controller or a downstream secondary controller connected to the target candidate controller based on the test result includes determining that the target candidate controller is the interference source if the exceeding signal exists; and determining that the downstream secondary controller is the interference source if the exceeding signal does not exist.

[0084] When the target candidate controller is powered on and not connected to the downstream secondary load, if the exceeding signal exists, it indicates that the interference source is the target candidate controller itself; if the exceeding signal does not exist, it means that the exceeding signal comes from its downstream secondary controller, and further testing of its downstream secondary controller is required.

[0085] Exemplarily, the target candidate controller is a body controller. If an exceeding signal exists when the body controller is powered on and not connected to a downstream secondary load, it indicates that the interference source is the body controller itself. If the exceeding signal does not exist, it indicates that the exceeding signal comes from its downstream secondary controller, and further testing is required on its downstream secondary controllers, such as window and door lock actuators, air conditioners, lighting, sensors, etc.

[0086] In this embodiment, the target candidate controller is disconnected from the downstream secondary controller to which it is connected and its normal working state is simulated, so that the normal operation of the downstream secondary controller is ensured while the interference of the downstream secondary controller is eliminated. A radiation emission test is performed based on the target candidate controller that is powered on and working normally, thereby achieving the purpose of further analyzing the location of the interference source.

[0087] In one embodiment, Figure 4As shown, the number of the downstream secondary controllers connected to the target candidate controller is multiple, and if the exceeding signal does not exist, the downstream secondary controller is determined to be the interference source, including steps 402 to 406:

[0088] Step 402, supplying power to each of the downstream secondary controllers in turn with a separate power supply.

[0089] There may be multiple downstream secondary controllers connected to the target candidate controller, and it is necessary to supply power to each of the multiple downstream secondary controllers individually and simulate their normal working state.

[0090] Step 404 , performing radiation emission tests on the power-on state and the power-off state of each of the downstream secondary controllers.

[0091] Step 406: If the radiation emission test exceeding signal of the candidate downstream secondary controller exists when the candidate downstream secondary controller is powered on, and the exceeding signal does not exist when the candidate downstream secondary controller is powered off, then the candidate downstream secondary controller is determined to be the interference source, wherein the candidate downstream secondary controller is one of the multiple downstream secondary controllers.

[0092] If the exceeding signal still exists when the downstream secondary controller is powered separately and tested, the downstream secondary controller is not an interference source; if the exceeding signal does not exist, the downstream secondary controller is a candidate downstream secondary controller that causes the exceeding.

[0093] In this embodiment, on the premise that the interference source is determined to be from the downstream secondary controller, each of the downstream secondary controllers is tested in turn, which plays a role in determining the candidate downstream secondary controller that causes the excess.

[0094] In one embodiment, if the exceedance signal does not exist when the target candidate controller is in a power-off state and a power-on state, other untested controllers on the circuit system are powered by a separate power supply, and a radiation emission test is performed based on the power-on and power-off of the other untested controllers to re-determine the target candidate controller.

[0095] If the exceeding signal does not exist when the target candidate controller is in the power-off state and the power-on state, it means that the exceeding signal comes from other untested controllers in the vehicle power network, then each of the other untested controllers is powered by a separate power supply and its normal working state is simulated, and radiation emission tests are performed based on the power-on and power-off states of each of the other untested controllers in turn and the existence of the exceeding signal is analyzed, and the target candidate controller that causes the exceeding can be re-determined based on the exceeding signal, wherein the target candidate controller that causes the exceeding may be one or more.

[0096] In this embodiment, by powering and testing each controller connected to the vehicle power network separately, the effect of preliminarily determining the source of the excessive signal is achieved.

[0097] In one embodiment, the different power gears include at least three gears: off (OFF), accessory connection (ACC), and on (ON). In each power gear, the number of controllers connected to the power network is different, wherein the target candidate controller is one of the multiple controllers.

[0098] The actual vehicle power gears include at least OFF, ACC, and ON. The number of controllers powered on in the OFF, ACC, and ON gears increases successively. The controllers can be subjected to radiation emission tests in different gears in turn to determine the target candidate controllers.

[0099] Among them, Figure 5 As shown, the circuit system is subjected to radiation emission test based on different power levels respectively, and a target candidate controller connected to a power network in the circuit system is determined according to an over-limit signal of the radiation emission test, including steps 502 to 506:

[0100] Step 502: Perform a radiation emission test on the circuit system based on the OFF gear.

[0101] Step 504: if there is an over-standard signal in the OFF gear, the separate power supply is turned on or off in turn for each of the first candidate controllers in the OFF gear, so as to determine the target candidate controller from the multiple first candidate controllers corresponding to the OFF gear.

[0102] If there is an excessive signal in the OFF gear, it means that the excessive signal is related to the first candidate controller in the OFF gear, and the first candidate controller connected in the OFF gear needs to be detected in turn to further confirm the interference source.

[0103] Exemplarily, if there is an exceeding standard signal in the OFF gear, the first controller powered on in the OFF gear can be tested in sequence. For example, the first controller can be an anti-theft controller, a positioning controller, etc. The anti-theft controller is disconnected from the vehicle power network and powered by a separate power supply. The anti-theft controller is ensured to be in normal working state by simulating loads and communication nodes, and the vehicle radiation emission scan is performed based on its power-on state and power-off state respectively. If the exceeding standard signal exists when the anti-theft controller is in the power-on state, and the exceeding standard signal does not exist when the anti-theft controller is in the power-off state, it indicates that the exceeding standard signal comes from the anti-theft controller or the downstream secondary controller connected to the anti-theft controller; if the exceeding standard signal does not exist when the anti-theft controller is in the power-on state and the power-off state, it indicates that the exceeding standard signal does not come from the anti-theft controller, and the positioning controller is tested, and so on.

[0104] Step 506: If there is no exceeding-standard signal in the OFF gear, determine the target candidate controller from the controller corresponding to the ACC gear or the controller corresponding to the ON gear.

[0105] If there is no exceeding signal in the OFF gear, it means that the exceeding signal is irrelevant to the first candidate controller in the OFF gear, and then only the controllers connected to the ACC or ON gear need to be detected in sequence.

[0106] In this embodiment, by sequentially detecting the first candidate controllers connected in the OFF gear based on the OFF gear, it can be determined whether the exceeding-standard signal is related to each controller in the OFF gear.

[0107] In one embodiment, Figure 6 As shown, the target candidate controller is determined from the controller corresponding to the ACC gear position or the controller corresponding to the ON gear position, including steps 602 to 606:

[0108] Step 602: Perform a radiation emission test on the circuit system based on the ACC profile.

[0109] Step 604: If there is an exceeding signal in the ACC gear, a second candidate controller newly added in the ACC gear relative to the OFF gear is selected.

[0110] Among them, the number of controllers connected in the ACC gear is greater than that in the OFF gear. If there is no over-standard signal in the OFF gear but there is an over-standard signal in the ACC gear, it means that the over-standard signal comes from the second candidate controller newly added compared to the OFF gear.

[0111] Step 606 , sequentially powering on or off the separate power supply of each of the second candidate controllers in the ACC gear to determine the target candidate controller from the second candidate controllers.

[0112] The exceeding standard signal comes from the second candidate controller newly added compared to the OFF gear. The second candidate controller needs to be powered by a separate power supply in turn, and the radiation emission scan is performed based on its power-on or power-off status to detect whether the exceeding standard signal exists.

[0113] In this embodiment, by sequentially detecting the second candidate controllers that are connected in the ACC gear based on the ACC gear, the target candidate controller that causes the exceeding of the standard in the ACC gear can be determined.

[0114] In one embodiment, Figure 7 As shown, if there is no exceeding signal in the ACC gear, the method further includes steps 702 to 706:

[0115] Step 702: Perform a radiation emission test on the circuit system based on the ON position.

[0116] Step 704: If there is an over-standard signal in the ON position, a third candidate controller newly added in the ON position relative to the ACC position is screened out.

[0117] Among them, the number of controllers connected in the ON gear is more than that in the ACC gear. If there is no exceeding standard signal in the ACC gear but there is an exceeding standard signal in the ON gear, it means that the exceeding standard signal comes from the third candidate controller newly added compared to the ACC gear.

[0118] Step 706 , sequentially powering on or off the separate power supply of each of the third candidate controllers in the ON position, so as to determine the target candidate controller from the third candidate controllers.

[0119] The exceeding-standard signal comes from the third candidate controller newly added compared to the ACC gear. The third candidate controller needs to be powered by a separate power supply in turn, and the radiation emission scan is performed based on its power-on or power-off status to detect whether the exceeding-standard signal exists.

[0120] In this embodiment, by sequentially detecting the third candidate controllers that are turned on in the ON gear based on the ON gear, the target candidate controller that causes the exceeding of the standard in the ON gear can be determined.

[0121] In one embodiment, Figure 8 As shown, an electromagnetic compatibility test method is provided, and the method is applied to Figure 1 The circuit system shown in FIG. 1 is used as an example to illustrate the invention, including steps 802 to 828:

[0122] Step 802 , performing a radiation emission test on the circuit system based on the OFF gear and determining whether an over-standard signal exists.

[0123] Step 804: if there is an over-standard signal in the OFF gear, the separate power supply is turned on or off in turn for each of the first candidate controllers in the OFF gear, so as to determine the target candidate controller from the multiple first candidate controllers corresponding to the OFF gear.

[0124] Step 806: If there is no exceeding-standard signal in the OFF gear, a radiation emission test is performed on the circuit system based on the ACC gear to determine whether there is an exceeding-standard signal.

[0125] Step 808, if there is an exceeding signal in the ACC gear, a second candidate controller newly added in the ACC gear relative to the OFF gear is screened out, and each of the second candidate controllers in the ACC gear is powered by a separate power supply in turn to determine the target candidate controller from the second candidate controllers.

[0126] Step 810: If there is no exceeding-standard signal in the ACC gear, a radiation emission test is performed on the circuit system based on the ON gear to determine whether there is an exceeding-standard signal.

[0127] Step 812: If there is an exceeding signal in the ON gear, a third candidate controller newly added in the ON gear relative to the ACC gear is screened out, and the separate power supply is turned on or off for each of the third candidate controllers in the ON gear in turn to determine the target candidate controller from the third candidate controllers.

[0128] Step 814, disconnect the power supply path between the target candidate controller and the power network, and supply power to the target candidate controller with a separate power supply, and perform radiation emission tests on the power-on and power-off states of the target candidate controller and determine whether an over-standard signal exists.

[0129] Step 816: If the exceeding signal does not exist, it is necessary to power on and test the undetected controllers of the vehicle network separately to re-determine the target candidate controller.

[0130] Step 818: If the exceeding signal exists, it is determined that the target candidate controller is the interference source causing the exceeding signal.

[0131] Step 820, disconnect the communication path between the target candidate controller and all the downstream secondary controllers, and simulate the load and network communication nodes of the target candidate controller to enable the target candidate controller to work normally.

[0132] Step 822 , detecting whether the exceeding-standard signal exists based on the target candidate controller being powered on and operating normally.

[0133] Step 824: If the exceeding signal exists, determine that the target candidate controller is the interference source.

[0134] Step 826, if the exceeding-standard signal does not exist, each of the downstream secondary controllers is powered by a separate power supply in turn, and a radiation emission test is performed on the power-on state and the power-off state of each of the downstream secondary controllers respectively.

[0135] Step 828: If the radiation emission test exceeding standard signal of the candidate downstream secondary controller exists when the candidate downstream secondary controller is powered on, and the exceeding standard signal does not exist when the candidate downstream secondary controller is powered off, then the candidate downstream secondary controller is determined to be the exceeding standard interference source.

[0136] In this embodiment, by performing radiation emission tests on the whole vehicle based on the three gears of OFF, ACC, and ON respectively, the target candidate controller that causes the excessive interference is preliminarily determined, the target candidate controller is powered by a separate power supply and radiation emission tests are performed based on its power-on and power-off states, and its excessive signal is obtained, which has the effect of accurately locating the excessive interference source through the excessive signal and the power-on and power-off states.

[0137] It should be understood that although Figure 2-8 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2-8 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0138] In one embodiment, Fig. 9 As shown, an electromagnetic compatibility testing device for a circuit system is provided, and the device includes a testing module 902 , an independent power supply module 904 , a signal acquisition module 906 and a determination module 908 .

[0139] The test module 902 is used to perform a radiation emission test on the circuit system based on different power gears of the whole vehicle, and determine a target candidate controller connected to the power network in the circuit system according to the exceeding signal of the radiation emission test, wherein the target candidate controller is the controller that causes the electromagnetic compatibility signal to exceed the standard.

[0140] The independent power supply module 904 is used to disconnect the power supply path between the target candidate controller and the power supply network, and to supply power to the target candidate controller with an independent power supply.

[0141] The signal acquisition module 906 is used to perform radiation emission tests on the power-on and power-off states of the target candidate controllers and obtain test results.

[0142] The determination module 908 is used to determine the excessive interference source of the vehicle circuit system according to the corresponding test results in the power-on state and the power-off state.

[0143] In this embodiment, the test module 902 performs a radiation emission test on the entire vehicle based on different power levels and preliminarily determines the target candidate controller. The independent power supply module 904 supplies power to the target candidate controller separately. The test module 902 performs a radiation emission test on its power-on and power-off states respectively and detects whether there is an excessive signal through the signal acquisition module 906. Based on the excessive signal and the power-on and power-off states, it can be determined whether the target candidate controller is the excessive interference source of the entire vehicle, which has the effect of accurately locating the source of the excessive signal of the entire vehicle through the determination module 908.

[0144] In one embodiment, the test result includes the presence of an excessive signal and the absence of an excessive signal, and the determination module 908 is further configured to determine that the excessive interference source is a power supply network in the circuit system if the target candidate controller is in a power-off state and a power-on state and the test result is that the excessive signal does not exist;

[0145] The determination module 908 is also used to determine that the interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller if the target candidate controller is in a power-off state and the test result is that there is no excessive signal, and if the target candidate controller is in a power-on state and the test result is that there is an excessive signal.

[0146] In one embodiment, if the target candidate controller is in a powered-on state and the test result is that there is an excessive signal, the independent power supply module 904 is also used to disconnect the communication path between the target candidate controller and all the downstream secondary controllers, and simulate the load and network communication nodes of the target candidate controller to enable the target candidate controller to work normally. The test module 902 is also used to perform detection based on the target candidate controller that is in a powered-on state and working normally. The signal acquisition module 906 is also used to obtain the test result. The determination module 908 is also used to determine, based on the test result, that the excessive interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller.

[0147] In one embodiment, the test result includes the presence of the exceeding signal and the absence of the exceeding signal, wherein the determination module 908 is used to determine, according to the test result, that the exceeding interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller, including:

[0148] If the test result is that there is an excessive signal, the determination module 908 is further used to determine that the target candidate controller is the interference source;

[0149] If the test result is that there is no exceeding-standard signal, the determination module 908 is further configured to determine that the downstream secondary controller is the interference source.

[0150] In one embodiment, there are multiple downstream secondary controllers connected to the target candidate controller. If the excess signal does not exist, the determination module 908 is also used to determine that the downstream secondary controller is the interference source. The independent power supply module 904 is also used to supply power to each downstream secondary controller in turn, the test module 902 is also used to perform radiation emission tests on the power-on state and the power-off state of each downstream secondary controller, and the signal acquisition module 906 is also used to obtain the radiation emission test results of the power-on state and the power-off state of each downstream secondary controller. If the radiation emission test excess signal of the candidate downstream secondary controller exists in the power-on state, and the excess signal does not exist in the power-off state, the determination module 908 is also used to determine that the candidate downstream secondary controller is the interference source, wherein the candidate downstream secondary controller is one of the multiple downstream secondary controllers.

[0151] In one embodiment, if the over-standard signal does not exist when the target candidate controller is in a power-off state and a power-on state, the independent power supply module 904 is also used to provide independent power supply to other untested controllers on the circuit system, the test module 902 is also used to perform radiation emission tests based on power-on and power-off of the other untested controllers, the signal acquisition module 906 is also used to obtain the test results, and the determination module 908 is also used to re-determine the target candidate controller.

[0152] In one embodiment, the different power gears include at least three gears: off, accessory on, and on. In each power gear, the number of controllers connected to the power network is different, wherein the target candidate controller is one of the multiple controllers.

[0153] The testing module 902 is further configured to perform a radiation emission test on the circuit system based on the OFF gear.

[0154] The independent power supply module 904 is also used to turn on or off the independent power supply to each of the first candidate controllers in the OFF position in turn if there is an over-standard signal in the OFF position. The determination module 908 is also used to determine the target candidate controller from multiple first candidate controllers corresponding to the OFF position.

[0155] If there is no exceeding-standard signal in the OFF gear, the testing module 902 is further configured to perform a radiation emission test on the circuit system based on the ACC gear.

[0156] If there is an exceeding signal under the ACC gear, a second candidate controller newly added in the accessory connection gear relative to the OFF gear is screened out; the independent power supply module 904 is also used to sequentially power on or off the separate power supply to each of the second-selected controllers under the ACC gear, so that the determination module 908 determines the target candidate controller from the second candidate controllers.

[0157] If there is no exceeding-standard signal in the ACC gear, the testing module 902 is further configured to perform a radiation emission test on the circuit system based on the ON gear.

[0158] If there is an exceeding signal in the ON gear, the third candidate controller newly added in the ON gear relative to the ACC gear is screened out; the independent power supply module 904 is also used to turn on or off the separate power supply to each of the third candidate controllers in the ON gear in turn, so that the determination module 908 determines the target candidate controller from the third candidate controllers.

[0159] For the specific definition of the electromagnetic compatibility test device, please refer to the definition of the electromagnetic compatibility method above, which will not be repeated here. Each module in the above electromagnetic compatibility device can be implemented in whole or in part by software, hardware and their combination. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0160] In one embodiment, a computer device is provided, whose internal structure diagram can be as follows: Fig.10As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, an electromagnetic compatibility test method is implemented.

[0161] Those skilled in the art will understand that Fig.10 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0162] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in each embodiment of the electromagnetic compatibility testing method are implemented.

[0163] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0164] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0165] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for testing electromagnetic compatibility of a vehicle circuit system, characterized in that: The method comprises: Performing radiation emission tests on the circuit system based on different power levels of the vehicle, and determining a target candidate controller connected to a power network in the circuit system according to an excessive signal of the radiation emission test, wherein the target candidate controller is a controller that causes an excessive electromagnetic compatibility signal; Disconnecting the power supply path between the target candidate controller and the power supply network, and supplying power to the target candidate controller with a separate power supply; For each of the target candidate controllers, a radiation emission test is performed based on the on / off state of the separate power supply and a test result is obtained; Determine the excessive interference source of the vehicle circuit system according to the corresponding test results in the power-on state and the power-off state; The test result includes the presence of an excessive signal and the absence of an excessive signal, and the determining of the excessive interference source of the vehicle circuit system according to the corresponding test results in the power-on state and the power-off state includes: If the target candidate controller is in a power-off state and a power-on state, and the test results show that there is no excessive signal, then it is determined that the excessive interference source is a power supply network in the circuit system; If the target candidate controller is in a power-off state, the test result is that there is no exceeding-standard signal, and if the target candidate controller is in a power-on state, the test result is that there is an exceeding-standard signal, then it is determined that the interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller.

2. The method according to claim 1, characterized in that If the target candidate controller is in a powered-on state, the test result is that there is an over-limit signal, the method further includes: Disconnecting the communication path between the target candidate controller and all downstream secondary controllers, and simulating the load and network communication nodes of the target candidate controller to enable the target candidate controller to work normally; Detecting whether the exceeding-standard signal exists based on the target candidate controller being powered on and operating normally; According to the test result, it is determined that the excessive interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller.

3. The method according to claim 2, characterized in that The test result includes the presence of an excessive signal and the absence of an excessive signal, wherein determining, according to the test result, that the excessive interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller includes: If the test result shows that there is an excessive signal, determining the target candidate controller as the interference source; If the test result shows that there is no exceeding-standard signal, the downstream secondary controller is determined to be the interference source.

4. The method according to claim 3, characterized in that The number of the downstream secondary controllers connected to the target candidate controller is multiple, and if the exceeding signal does not exist, determining the downstream secondary controller as the interference source includes: Supplying power to each of the downstream secondary controllers separately in turn; Performing radiation emission tests on the power-on state and the power-off state of each of the downstream secondary controllers respectively; If the radiation emission test exceeding signal of the candidate downstream secondary controller exists when the candidate downstream secondary controller is powered on, and the exceeding signal does not exist when the candidate downstream secondary controller is powered off, the candidate downstream secondary controller is determined to be the interference source, wherein the candidate downstream secondary controller is one of the multiple downstream secondary controllers.

5. The method according to claim 1, characterized in that If the exceedance signal does not exist when the target candidate controller is in the power-off state and the power-on state, the untested controller on the circuit system is powered by a separate power supply, and a radiation emission test is performed based on the power-on and power-off of the untested controller to re-determine the target candidate controller.

6. The method according to claim 1, characterized in that The different power gears of the vehicle include at least three gears: off gear, accessory on gear, and on gear. Under each power gear, the number of controllers connected to the power network is different, wherein the target candidate controller is one of the multiple controllers.

7. The method according to claim 6, characterized in that Performing a radiation emission test on the circuit system based on different power levels of the vehicle, and determining a target candidate controller connected to a power network in the circuit system according to an over-standard signal of the radiation emission test, including: Performing a radiation emission test on the circuit system based on the closed gear; If there is an over-limit signal in the closing gear, the separate power supply is powered on or off in sequence for each first candidate controller in the closing gear, so as to determine the target candidate controller from a plurality of first candidate controllers corresponding to the closing gear; If there is no exceeding signal in the closing gear, the target candidate controller is determined from the controller corresponding to the accessory connecting gear or the controller corresponding to the connecting gear.

8. The method according to claim 7, characterized in that The determining the target candidate controller from the controller corresponding to the accessory on gear position or the controller corresponding to the on gear position comprises: Performing a radiated emission test on the circuit system based on the accessory on profile; If there is an over-standard signal in the accessory on gear, a second candidate controller newly added in the accessory on gear relative to the off gear is selected; The separate power supply is sequentially turned on or off for each of the second candidate controllers in the accessory connection mode to determine the target candidate controller from the second candidate controllers.

9. The method according to claim 8, characterized in that If there is no over-limit signal in the accessory connection gear, the method further includes: Performing a radiation emission test on the circuit system based on the on-mode; If there is an over-standard signal in the on-shift gear, a third candidate controller newly added in the on-shift gear relative to the accessory on-shift gear is selected; The separate power supply is sequentially turned on or off for each of the third candidate controllers in the on gear to determine the target candidate controller from the third candidate controllers.

10. An electromagnetic compatibility test device for a circuit system, characterized in that: The device comprises: A test module, used to perform a radiation emission test on the circuit system based on different power gears of the vehicle, and determine a target candidate controller connected to the power network in the circuit system according to an excessive signal of the radiation emission test, wherein the target candidate controller is a controller that causes an excessive electromagnetic compatibility signal; An independent power supply module, used to disconnect the power supply path between the target candidate controller and the power supply network, and to supply power to the target candidate controller with an independent power supply; A signal acquisition module, used for performing a radiation emission test on each of the target candidate controllers based on the on / off state of the separate power supply and obtaining a test result; A determination module, used to determine the excessive interference source of the vehicle circuit system according to the corresponding test results in the power-on state and the power-off state; The test result includes the presence of an excessive signal and the absence of an excessive signal, and the determination module is further used to determine that the excessive interference source is a power supply network in the circuit system if the target candidate controller is in a power-off state and a power-on state and the test result is that the excessive signal does not exist; If the target candidate controller is in a power-off state, the test result is that there is no exceeding-standard signal, and if the target candidate controller is in a power-on state, the test result is that there is an exceeding-standard signal, then it is determined that the interference source is the target candidate controller or a downstream secondary controller connected to the target candidate controller.

11. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 9 are implemented.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 9 are implemented.

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