Vehicle lightning effect test method, system, device and medium

Abstract

The invention discloses a vehicle lightning effect test method, system and device and a medium, and relates to the field of electromagnetic compatibility testing, and the method comprises the steps: obtaining a lightning effect test type when a tested vehicle meets a test condition; determining lightning effect test parameters corresponding to the lightning effect test type; according to the lightning effect test parameter, controlling a lightning interference generation device to emit a current signal to the test vehicle so as to generate lightning interference to the test vehicle; the tested vehicle is located on the conductive grounding plane, the lightning interference generating device is connected with the tested vehicle through an input connecting line and connected with the conductive grounding plane through a grounding return line, and a tire metal assembly of the tested vehicle is connected with the conductive grounding plane through an output connecting line; and performing an electromagnetic immunity test on the test vehicle, detecting vehicle state information of the test vehicle under lightning interference, and obtaining a test result. According to the scheme, the lightning effect of the test vehicle can be comprehensively and accurately tested.

Description

Technical Field

[0001] The present invention generally relates to the technical field of electromagnetic compatibility testing, and in particular to a vehicle lightning effect testing method, system, device and medium. Background Art

[0002] With the rapid development of modern science and technology, the degree of electrification and intelligence of vehicles is increasing day by day. A large number of electronic devices and complex electronic systems are widely used in vehicles. These systems play a vital role in the normal operation, safety and comfort of vehicles. However, in the use environment of vehicles, lightning, as a powerful natural electromagnetic interference source, poses a serious threat to the electronic system of vehicles. Its discharge process will generate strong current, electric field and magnetic field. When a vehicle is directly hit by lightning, the high energy of lightning will pass through the metal structure, antenna and other conductive parts of the vehicle, and instantly introduce huge current into the vehicle. This will not only cause instantaneous overvoltage and overcurrent in the electronic equipment of the vehicle, causing damage to the hardware of the equipment, such as the ignition system, cooling system, speed indicator, etc., but may also cause malfunction of the electronic system, interfere with the normal control logic of the vehicle, and thus affect the driving safety of the vehicle.

[0003] At present, with the development of intelligent automotive electronic and electrical systems, vehicles are more susceptible to interference from electromagnetic environments such as lightning. In order to ensure the safe operation of vehicles in lightning environments and prevent serious consequences such as damage to electronic systems and fires caused by lightning, how to conduct electromagnetic compatibility testing on direct lightning effects on vehicles is an urgent problem to be solved. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a vehicle lightning effect testing method, system, device and medium.

[0005] In a first aspect, the present invention provides a vehicle lightning effect testing method, the method comprising: When the test vehicle meets the test conditions, a lightning effect test type is obtained; the lightning effect test type includes a lightning direct effect test type and a lightning indirect effect test type; Determining lightning effect test parameters corresponding to the lightning effect test type; According to the lightning effect test parameters, the lightning interference generating device is controlled to emit a current signal to the test vehicle to generate lightning interference to the test vehicle; the test vehicle is located on a conductive ground plane, the lightning interference generating device is connected to the test vehicle through an input connection line, the lightning interference generating device is connected to the conductive ground plane through a ground return line, and the tire metal component of the test vehicle is connected to the conductive ground plane through an output connection line; An electromagnetic immunity test is performed on the test vehicle, vehicle status information of the test vehicle under the lightning interference is detected, and a test result is obtained according to the vehicle status information.

[0006] In one embodiment, performing an electromagnetic immunity test on the test vehicle to detect vehicle status information of the test vehicle under the lightning interference includes: When the lightning effect test type is a lightning direct effect test type, detecting whether the test vehicle has a fire phenomenon and whether the door is in a normal open state; When the lightning effect test type is a lightning indirect effect test type, it is detected whether the vehicle integrated system of the test vehicle is in a normal state.

[0007] In one embodiment, the test result includes a direct test result and an indirect test result; and the test result is obtained according to the vehicle status information, including: When there is no fire in the test vehicle and the door is in a normally open state, determining that the direct test result is a test pass; When the vehicle integrated system of the test vehicle is in a normal state, determining the indirect test result as a test pass; If both the direct test result and the indirect test result are test passed, the test result is determined to be test passed.

[0008] In one embodiment, obtaining a test result according to the vehicle status information includes: When the test vehicle is on fire and / or the door is in an abnormally open state, determining that the direct test result is a test failure; When the vehicle integrated system of the test vehicle is in an abnormal state, determining the indirect test result as a test failure; If at least one of the direct test result and the indirect test result is a test failure, the test result is determined to be a test failure.

[0009] In one embodiment, before transmitting the current signal to the test vehicle to generate lightning interference to the test vehicle, the method further includes: checking whether the test vehicle is in an unloaded mode; When in the no-load mode, the test vehicle is controlled to be in a powered-on state and the power source of the test vehicle is in a powered-off state.

[0010] In one embodiment, according to the lightning effect test parameters, controlling the lightning interference generating device to transmit a current signal to the test vehicle to generate lightning interference to the test vehicle includes: According to the lightning effect test parameters, controlling the lightning interference generating device to perform parameter configuration; When the parameter configuration is completed, the current generator in the lightning interference generating device is controlled to transmit the current signal to the test vehicle through the input connection line, and flow out to the reference ground plane through the output connection line to generate lightning interference to the test vehicle.

[0011] In one embodiment, before obtaining the lightning effect test type, the method further includes: The lightning interference generating device is calibrated to ensure that the lightning interference generating device is in a normal working state.

[0012] In a second aspect, an embodiment of the present application provides a vehicle lightning effect testing system, the system comprising: A main control device and a lightning interference generating device; the main control device establishes a communication connection with the lightning interference generating device; The main control device is used to: when the test vehicle meets the test conditions, obtain the lightning effect test type and determine the lightning effect test parameters corresponding to the lightning effect test type; According to the lightning effect test parameters, the lightning interference generating device is controlled to transmit a current signal to the test vehicle to generate lightning interference to the test vehicle; the electromagnetic immunity test is performed on the test vehicle, the vehicle state information of the test vehicle under the lightning interference is detected, and the test result is obtained according to the vehicle state information; the test vehicle is located on a conductive ground plane, the lightning interference generating device is connected to the test vehicle through an input connection line, the lightning interference generating device is connected to the conductive ground plane through a ground return line, and the tire metal component of the test vehicle is connected to the conductive ground plane through an output connection line; The lightning interference generating device is used to transmit a current signal to the test vehicle to generate lightning interference to the test vehicle.

[0013] In a third aspect, an embodiment of the present application provides a main control device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method provided in the above embodiment.

[0014] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method provided in the above embodiment is implemented.

[0015] The vehicle lightning effect test method, system, device and medium provided by the embodiments of the present application include: when the test vehicle meets the test conditions, obtaining the lightning effect test type and determining the lightning effect test parameters corresponding to the lightning effect test type; according to the lightning effect test parameters, controlling the lightning interference generating device to transmit a current signal to the test vehicle to generate lightning interference to the test vehicle; the test vehicle is located on a conductive ground plane; the lightning interference generating device is connected to the test vehicle through an input connection line; the tire metal component of the test vehicle is connected to the conductive ground plane through an output connection line; and the test vehicle is subjected to an electromagnetic immunity test, the vehicle status information of the test vehicle under lightning interference is detected, and the test result is obtained according to the vehicle status information. Compared with the prior art, on the one hand, this technical solution places the test vehicle on a conductive grounding plane, and the lightning interference generating device is connected to the test vehicle through an input connecting line, the lightning interference generating device is connected to the conductive grounding plane through a grounding return line, and its tire assembly is connected to the conductive grounding plane through an output connecting line, so that the test vehicle can avoid tire blowout, and the generated current signal can be more stably transmitted to the conductive grounding plane through the lightning interference generating device, thereby simulating a more realistic lightning interference environment for the test vehicle; on the other hand, by detecting the vehicle status information of the test vehicle under lightning interference, the electromagnetic immunity of the lightning effect of the test vehicle can be more comprehensively evaluated, so that potential risk points can be identified in advance, the risk of lightning accidents is reduced, and the safety of vehicle driving is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 A schematic diagram of the structure of a vehicle lightning effect test system provided in an embodiment of the present application; Figure 2 A schematic diagram of a structure in which a vehicle tire is connected to a conductive ground plane according to an embodiment of the present application; Figure 3 A schematic diagram of a vehicle lightning effect testing method provided in an embodiment of the present application; Figure 4 A schematic diagram of a test pulse waveform generated by a current generator provided in an embodiment of the present application; Figure 5 A flow chart of a method for performing an electromagnetic immunity test on a test vehicle and detecting vehicle status information of the test vehicle under lightning interference provided in an embodiment of the present application; Figure 6 A top view of the connection between a test vehicle and a lightning interference generating device provided in an embodiment of the present application; Figure 7A front view of the connection between the test vehicle and the lightning interference generating device provided in an embodiment of the present application; Figure 8 A schematic diagram of the structure of a main control device provided in an embodiment of the present application; Description of Reference Numerals Lightning interference generating device-10; current generator-11; input connecting line-12; output connecting line-13; conductive ground plane-14; oscilloscope-15; current probe-16; insulator-17; high voltage terminal electrode-18; return terminal electrode-19; main control device-20; ground return line-21; test vehicle-30; tire-31; metal component-311, conductor plate-141; insulating support plate-142; fixing part-143. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0018] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] At present, with the development of intelligent automotive electronic and electrical systems, vehicles are more susceptible to interference from electromagnetic environments such as lightning. In order to ensure the safe operation of vehicles in lightning environments and prevent serious consequences such as damage to electronic systems and fires caused by lightning, how to conduct electromagnetic compatibility testing on direct lightning effects on vehicles is an urgent problem to be solved.

[0020] Based on the above-mentioned defects, the present application provides a vehicle lightning effect testing method, system, device and medium. Compared with the prior art, on the one hand, the technical solution places the test vehicle on a conductive ground plane, and the lightning interference generating device is connected to the test vehicle through an input connecting line, the lightning interference generating device is connected to the conductive ground plane through a grounding return line, and its tire assembly is connected to the conductive ground plane through an output connecting line, so that the test vehicle can avoid tire blowout, and the lightning interference generating device can transmit the generated current signal to the conductive ground plane more stably, thereby simulating a more realistic lightning interference environment for the test vehicle; on the other hand, by detecting the vehicle status information of the test vehicle under lightning interference, the electromagnetic immunity of the lightning effect of the test vehicle can be more comprehensively evaluated, so that potential risk points can be identified in advance, the risk of lightning accidents is reduced, and the safety of vehicle driving is further improved.

[0021] See also Figure 1 As shown, Figure 1 The structure diagram of the vehicle lightning effect test system is shown in FIG. The system includes: a lightning interference generating device 10 and a main control device 20 ; the main control device 20 establishes a communication connection with the lightning interference generating device 10 .

[0022] It should be noted that the lightning interference generating device 10 may include a current generator 11, an input connection line 12, an output connection line 13, a ground return line 21 and a conductive ground plane 14. The vehicle lightning effect test system is used to test the lightning effect of the test vehicle 30, and by simulating a real lightning strike, the reaction of the vehicle under extreme conditions is tested to ensure that the vehicle will not cause serious safety hazards when struck by lightning. Among them, the test vehicle 30 refers to a vehicle that needs to be tested for lightning effects, and the test vehicle 30 may include: a drive system, a braking system, a steering system, a hands-off detection system, etc.

[0023] The lightning interference generating device 10 is a device for generating lightning interference to the test vehicle 30. The lightning interference generating device 10 is used to: emit a current signal to the test vehicle 30 to generate lightning interference to the test vehicle 30. The lightning effect test may include a variety of test methods, such as a small current test, a large current test, and a simulated load test method, wherein the large current test method is not performed independently, but in the small current test and the simulated load test. The vehicle lightning effect test method provided in the embodiment of the present application can be applied to the large current test method. The large current test means that the current value corresponding to the generated current signal is greater than the preset current value. The lightning interference generating device 10 is connected to the test vehicle 30 through the input connection line 12, the lightning interference generating device 10 is connected to the conductive ground plane 14 through the ground return line 21, and the tire metal component 311 of the test vehicle 30 is connected to the conductive ground plane 14 through the output connection line 13.

[0024] The above test vehicle can be one or more than one, and the test vehicle can be an electric vehicle, a fuel vehicle, or a hybrid vehicle. Figure 2 As shown, the test vehicle includes tires 31, and the number of tires 31 can be customized according to actual needs, for example, two, three or more. The conductive ground plane 14 includes a conductor plate 141 and an insulating support plate 142, and the tire 31 can include a metal component 311, and the metal component 311 can be, for example, a screw or a bolt. The metal component 311 of the tire 31 in the test vehicle is connected to the conductive ground plane 14 through the output connection line 13, and the output connection line 13 can be connected to the conductor plate 141 through the fixing member 143.

[0025] The main control device 20 has the functions of processing, receiving and sending data, and may include a server and a terminal that establishes a communication connection with the server. Optionally, the server may be a single server, or a server cluster or distributed system composed of several servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (CDN), and big data and artificial intelligence platforms. An operating system may be running on the terminal, and the operating system may include but is not limited to Android systems, IOS systems, Linux systems, Unix, Windows systems, etc., and may also include a user interface (UI) layer, which may provide data display to the outside through the UI layer. In addition, data may be sent to the lightning interference generating device 10 based on an application programming interface (API), and may be used to receive data transmitted by the lightning interference generating device 10.

[0026] Servers and terminals may be equipped with microprocessors (MCU), memories (ROM, RAM), input / output interfaces (I / O), analog-to-digital converters (A / D), and large-scale integrated circuits such as shaping and driving.

[0027] In order to better understand and illustrate the vehicle lightning effect test method provided in the embodiment of the present application, Figures 3 to 8 Detailed explanation.

[0028] Figure 3 A schematic diagram of a vehicle lightning effect testing method provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the method is executed by a main control device, and the main control device can be implemented as part or all of the main control device by software, hardware, or a combination of software and hardware. The method includes: S101. When the test vehicle meets the test conditions, obtain a lightning effect test type; the lightning effect test type includes a lightning direct effect test type and a lightning indirect effect test type.

[0029] It should be noted that the above test conditions refer to the conditions that the test vehicle needs to meet before conducting the lightning effect test. They can be customized according to actual needs and may include the vehicle status information of the test vehicle and the line connection information of the test vehicle. The above lightning direct effect test type refers to the phenomenon that lightning directly conducts current to the test vehicle and affects the test vehicle; the lightning indirect effect test type refers to the phenomenon that when lightning strikes the test vehicle or produces discharge in the surrounding environment, it affects the test vehicle through other indirect means instead of directly conducting lightning current to the test vehicle.

[0030] Before determining the test conditions for the test vehicle, it is necessary to first establish a connection between the lightning interference generating device and the test device through the vehicle lightning test system. Figure 1 As shown, the test vehicle 30 is placed at the center of the conductive ground plane 14, for example, at the geometric center of the conductive ground plane 14. In order to reduce the influence of the edge effect, the distance between the edge of the conductive ground plane 14 and the test vehicle 30 needs to be greater than a preset distance threshold. The preset distance threshold can be customized according to actual needs, for example, it can be 15 cm or a value greater than 15 cm.

[0031] The conductive ground plane may be a good conductor with low resistance, generally a metal plate such as a copper plate, etc. The thickness of the conductive ground plane may be customized according to the actual test scenario and space size.

[0032] Before testing the lightning effect, it is necessary to calibrate the lightning interference generating device so that the lightning interference generating device is in normal working state. Among them, the lightning interference generating device is in normal working state means that under different states, the current waveform generated by the lightning interference generating device meets the requirements of the corresponding state. The lightning interference generating device includes a current generator. Taking the lightning test as a large current test method as an example, the calibration equipment can be prepared first, and the calibration environment can be set, and then the calibration steps can be performed. The calibration equipment can include a current monitoring device that can accurately measure large currents and an oscilloscope. The current monitoring device is used to measure the lightning current, and the oscilloscope is used to display the current waveform generated by the current generator. In the process of setting the calibration environment, since the current generator will generate a strong electromagnetic field when working, it may interfere with the normal operation of the calibration equipment. Therefore, the calibration operation can be performed in an electromagnetic shielding room to reduce the impact of electromagnetic interference on the test results. Connect the current sensor in series in the output loop of the current generator, connect the oscilloscope to the current monitoring device, and set the acquisition parameters, such as sampling frequency, acquisition time, etc., and then repeat the no-load calibration, short-circuit calibration and other operations in sequence. Turn on the current generator, record the corresponding current waveform, analyze the acquired current waveform, and mainly measure the key parameters such as the rise time, peak current, and pulse width of the waveform. Compare the measurement results with the required standard waveform parameters. If they do not meet the requirements, the high current generator needs to be adjusted until they meet the requirements, thereby completing the calibration operation. Among them, the test pulse waveform generated by the current generator can be seen, for example, Figure 4 As shown, the horizontal axis is time and the vertical axis is current value. Among them, I represents the highest current value, O1 is the origin of the impact current, T1 is the impact current wave head time, T2 is the impact current wave tail time, t is time, and 10% in the figure represents 10% of the current value, 50% represents 50% of the current value, and 90% represents 90% of the current value.

[0033] After placing the test vehicle on a conductive ground plane, a current injection point and a current outflow point are selected on the test vehicle. The current injection point can be understood as a lightning strike point. The current injection point refers to the location where the actual lightning current is emitted. It can be customized according to the overall structure of the vehicle. For example, it can be the highest metal position of the metal part of the vehicle shell, the position of the metal shell on the roof, or the position of the vehicle's external antenna. The embodiment of the present application does not impose any limitation on the position of the current injection point.

[0034] The above-mentioned test vehicle can be a fully enclosed vehicle or a convertible vehicle. When the vehicle is a fully enclosed vehicle, the current injection point can be the center of the vehicle; when the vehicle is a convertible vehicle, the current injection point can be the intersection of the upper panel surface of the vehicle windshield and the center plane of the vehicle, or it can be the highest metal position in contact with the windshield.

[0035] After setting the current injection point on the test vehicle, the paint layer on the surface of the current injection point needs to be polished off to ensure that the current can be injected into the test vehicle. The current generator is connected to the test vehicle through an input connecting line. The input connecting line can usually be a copper braid or a large-diameter wire. For example, the input connecting line of the current generator can be fixed to the current injection point of the test vehicle by fixings such as screws or bolts.

[0036] The current outflow point can be set at the metal component of the test vehicle tire, such as the screw of the test vehicle tire or the bolt of the test vehicle tire. The output connection line is a short connection jumper, and the metal component of the wheel tire is connected to the conductive ground plane through the connection jumper. The tire of the test vehicle may include a rubber part. Although the rubber part of the wheel tire is not conductive, during the actual lightning strike of the wheel, the lightning current will flash through the metal component along the rubber part of the tire to the ground, or break through the rubber part of the tire, and then the inside of the tire, and finally flow to the ground. If a large current passes without an output connection line, the tire may burst. During the test, all tires of the test vehicle are grounded at the same time. When the test vehicle is a four-wheel vehicle, that is, it includes four tires, the four tires can be grounded at the same time, or each tire can be grounded separately; when the test vehicle is not a four-wheel vehicle, that is, it does not include four tires, it can be grounded in other ways, which can be determined by negotiation between the manufacturer and the testing agency.

[0037] Please continue to see Figure 2 As shown, Figure 2 This is a schematic diagram of the connection between the tire metal component and the conductive grounding plane in the embodiment of the present application. Taking the conductive grounding plane 14 including the conductor plate 141 and the insulating support plate 142, and the tire metal component 311 being the tire bolt as an example, the current outflow path is from the tire bolt to the conductor plate 141 of the conductive grounding plane 14. The conductor plate 141 is located on the insulating support plate 142, and the tire 31 of the test vehicle is in contact with the conductor plate 141. The tire bolt and the conductor plate 141 are connected via the output connecting wire 13. The output connecting wire 13 is a high-current-carrying fluid with a large current-carrying capacity. Since the lightning current has a fast rate of change and a relatively high amplitude, the current will generate a large electric force during the conduction process. Therefore, all connection positions at both ends of the output connecting wire 13 need to be fixed with the fixing parts 143 to prevent the output connecting wire 13 from falling off due to the large current. Considering the current parameters to be used, it is necessary to select a grounding wire with the ability to carry the corresponding current, such as a 100mm 2 A copper braided tape of a cross-sectional area conductor, wherein the fixing member 143 may include a bolt and a nut.

[0038] In this embodiment, the metal components of the test vehicle tire are connected to the conductive ground plane by setting an output connection line. On the one hand, it is to protect the tire from bursting. On the other hand, it can provide a low-impedance conductive path at the current outflow location while simulating the lightning current distribution as realistically as possible.

[0039] In this embodiment, the above-mentioned current generator can release the current signal charged in the capacitor to the test vehicle through the starting switch, thereby generating a current simulating lightning. The starting switch can be, for example, a CR circuit type switch. Since the large current simulating direct lightning strike lasts for a long time, in order to generate a current waveform, the current generator generally uses a freewheeling circuit generator, so that even if it simulates direct lightning, this circuit can be used at a current of tens of kA. The current generator should be a large current pulse generator, whose current can be greater than the preset current value, and is used to generate a 10 / 350μs current of a preset current level. The preset current level can be a different current level customized according to actual needs. The lightning interference generating device can also include a current monitoring device, which can include a flexible current probe, a current transformer or a shunt. The current transformer or shunt is used to measure the lightning current using a flexible current probe. The oscilloscope is used to obtain the waveform generated by the current generator. The bandwidth of the oscilloscope can be set to a preset parameter, and the preset parameter can be, for example, 25MHz. The lightning interference generating device may further include other measuring instruments, such as CT, high-voltage probes, etc., and corresponding parameters, such as the measuring frequency band and the maximum measuring level, may be measured by the other measuring instruments.

[0040] In this embodiment, by connecting the lightning interference generating device to the test vehicle through the input connecting line, and connecting the tire metal component of the test vehicle to the conductive grounding plane through the output connecting line, the current can flow from the current injection point on the test vehicle to the current outflow point of the tire metal component, thereby simulating a more realistic lightning environment. It is convenient to perform lightning effect testing on the test vehicle while avoiding tire blowout.

[0041] S102: Determine lightning effect test parameters corresponding to the lightning effect test type.

[0042] It can be understood that the above-mentioned lightning effect test parameters refer to the parameters corresponding to the lightning effect test required. Different lightning effect test types correspond to different lightning effect test parameters, which may specifically include different test levels, frequency bandwidths and other parameters, which can be customized according to test requirements.

[0043] When a direct lightning effect test is required, the lightning effect direct test parameters corresponding to the lightning direct effect test type are obtained; when an indirect lightning effect test is required, the lightning effect indirect test parameters corresponding to the lightning indirect effect test type are obtained. There is no restriction on the order of different types of lightning effect tests, as long as the lightning effect direct test and the lightning effect indirect test are completed.

[0044] Optionally, the lightning effect test parameters may include current waveform parameters, lightning energy parameters and lightning frequency parameters. Current waveform parameters may include pulse rise time, peak time, pulse width, peak current or peak voltage; lightning energy parameters may include current signal transfer amount and specific energy; lightning frequency parameters may include frequency parameters, etc.

[0045] S103. According to the lightning effect test parameters, control the lightning interference generating device to transmit a current signal to the test vehicle to generate lightning interference to the test vehicle; the test vehicle is located on a conductive ground plane, the lightning interference generating device is connected to the test vehicle through an input connecting line, and the tire metal component of the test vehicle is connected to the conductive ground plane through an output connecting line.

[0046] After determining the lightning effect test parameters, the lightning interference generating device can be controlled to perform parameter configuration according to the lightning effect test parameters. When the parameter configuration is completed, the current generator in the lightning interference generating device is controlled to transmit the generated current signal to the test vehicle through the input connection line, and the current signal is flowed out from the reference ground plane through the output connection line to generate lightning interference to the test vehicle.

[0047] Taking the lightning interference generating device as a current generator and the tire metal component as a bolt as an example, the current generator generates a current signal according to the lightning effect test parameters and releases it to the test vehicle through the input connection line, and then flows out from the output connection line to generate a current simulating lightning, thereby generating lightning interference to the test vehicle.

[0048] In this step, by emitting a current signal to the test vehicle, lightning interference can be generated on the test vehicle, thereby simulating a real lightning interference environment for the test vehicle, so that an environment more in line with the actual application scenario is imposed on the test vehicle, which facilitates the subsequent electromagnetic immunity test of the lightning effect of the test vehicle.

[0049] S104, performing an electromagnetic immunity test on the test vehicle, detecting vehicle status information of the test vehicle under lightning interference, and obtaining a test result based on the vehicle status information.

[0050] Specifically, after generating lightning interference to the test vehicle, the electromagnetic immunity test is performed on the test vehicle to detect the vehicle status information of the test vehicle under lightning interference, and the vehicle status information may include the door opening status and the status of the comprehensive system of the test vehicle. The vehicle comprehensive system includes: engine system, drive system, brake system, steering system, driving system, etc. The test result is used to indicate whether the electromagnetic immunity test of the lightning effect of the test vehicle has passed or failed.

[0051] After obtaining the vehicle status information, it can be determined whether it meets the normal status conditions based on the vehicle status information. When it meets the normal status conditions, the test result of the test vehicle is determined to be a passed test; when it does not meet the normal status conditions, the test result of the test vehicle is determined to be a failed test.

[0052] In one embodiment, after the above steps S101 to S103, the present application also provides a specific implementation method for performing an electromagnetic immunity test on the test vehicle and detecting the vehicle status information of the test vehicle under lightning interference. Figure 5 As shown, Figure 5 A flow chart of a method for performing an electromagnetic immunity test on a test vehicle and detecting vehicle status information of the test vehicle under lightning interference provided in an embodiment of the present application, the method comprising: S201, when the lightning effect test type is a lightning direct effect test type, detecting whether there is a fire phenomenon in the test vehicle and whether the door is in a normally open state.

[0053] S202: When the lightning effect test type is a lightning indirect effect test type, detect whether the vehicle integrated system of the test vehicle is in a normal state.

[0054] It is understandable that the above test results may include direct test results and indirect test results. The test results corresponding to the lightning direct effect test type are taken as direct test results, and the test results corresponding to the lightning indirect effect test type are taken as indirect test results.

[0055] As an implementable method, when the lightning effect test type is a lightning direct effect test type, the image information of the test vehicle can be collected, and the image information can be used to determine whether the test vehicle has a fire phenomenon, and the detection device can be used to determine whether the door is in a normal open state. When the test vehicle has no fire phenomenon and the door is in a normal open state, the direct test result is characterized as a test pass. When the test vehicle has a fire phenomenon, the direct test result is characterized as a test failure; when the door of the test vehicle is in an abnormally open state, the direct test result is characterized as a test failure.

[0056] As another achievable manner, when the lightning effect test type is a lightning indirect effect test type, the detection device can be used to determine whether the vehicle integrated system of the test vehicle is in a normal state. When the vehicle integrated system of the test vehicle is in a normal state, the indirect test result is determined to be a test pass; when the vehicle integrated system of the test vehicle is in an abnormal state, the indirect test result is determined to be a test fail.

[0057] If both the direct test result and the indirect test result are test passed, the test result is determined to be test passed. If at least one of the direct test result and the indirect test result is test failed, the test result is determined to be test failed.

[0058] Optionally, after obtaining the test results, the main control device can generate a test report according to the test results, and the test report records the state information of the test vehicle under the condition of lightning interference, whether the test has passed or failed the test, and can also include information such as the test plan, test purpose, test vehicle information, test location, test environment, test layout, test equipment, test conditions, measurement waveforms, test steps, etc. When the test passes, it indicates that the electromagnetic interference resistance of the lightning effect of the test vehicle is normal under the condition of lightning interference; when the test fails, it indicates that the electromagnetic interference resistance of the lightning effect of the test vehicle is abnormal under the condition of lightning interference.

[0059] A vehicle lightning effect test method provided by an embodiment of the present application includes: when a test vehicle meets the test conditions, obtaining a lightning effect test type, and determining a lightning effect test parameter corresponding to the lightning effect test type; according to the lightning effect test parameter, controlling a lightning interference generating device to transmit a current signal to the test vehicle to generate lightning interference to the test vehicle; the test vehicle is located on a conductive ground plane; the lightning interference generating device is connected to the test vehicle through an input connection line; a tire metal component of the test vehicle is connected to the conductive ground plane through an output connection line; an electromagnetic immunity test is performed on the test vehicle; vehicle status information of the test vehicle under lightning interference is detected; and a test result is obtained based on the vehicle status information. Compared with the prior art, on the one hand, this technical solution places the test vehicle on a conductive ground plane, and the lightning interference generating device is connected to the test vehicle through an input connecting line, and its tire assembly is connected to the conductive ground plane through an output connecting line, so that the test vehicle can avoid tire blowout and transmit the generated current signal to the conductive ground plane more stably through the lightning interference generating device, thereby simulating a more realistic lightning interference environment for the test vehicle; on the other hand, by detecting the vehicle status information of the test vehicle under lightning interference, the electromagnetic immunity of the lightning effect of the test vehicle can be more comprehensively evaluated, potential risk points can be identified in advance, the risk of lightning accidents is reduced, and the safety of vehicle driving is further improved.

[0060] In another embodiment of the present application, before performing a lightning interference test on a test vehicle, the test vehicle needs to be inspected, specifically, to check whether the test vehicle is in no-load mode; when in no-load mode, the test vehicle is controlled to be in a powered-on state and the power source of the test vehicle is in an off state.

[0061] The no-load mode refers to a mode in which the test vehicle is not loaded with passengers, cargo, liquid fuel, or gas fuel, and the tire pressure is within a preset pressure range, which is a custom setting based on actual needs. In the process of checking whether the test vehicle is in the no-load mode, the main control device may collect image information of the test vehicle and make a judgment, or may collect weight information of the test vehicle and make a judgment whether it is in the no-load mode. When the test vehicle is in the no-load mode, a control instruction is generated according to the vehicle type of the test vehicle, so that the test vehicle receives and responds to the control instruction, and the test vehicle is controlled to be in a powered-on state and the power source of the test vehicle is in a powered-off state.

[0062] It should be noted that the power source of the above-mentioned test vehicle may include: an engine or a drive motor. For example, when the vehicle type is a fuel vehicle, the control key is inserted into the ignition switch and turned to the "ON" position. At this time, the vehicle's electrical system is powered on, and the indicator lights on the dashboard (such as the battery indicator light, oil pressure indicator light, etc.) will light up, indicating that the vehicle's electronic equipment has started to power on, and then make sure that the engine is in the off state, that is, no sound of the engine starting is heard, and no vibration of the engine is felt.

[0063] Optionally, when the test vehicle is an electric vehicle, it is also necessary to determine whether the state of charge (SOC) of the test vehicle is at a preset power level. If it is not at the preset power level, it needs to be adjusted to the preset power level, which can be, for example, 20% to 80%. The SOC is used to represent the ratio of the remaining power in the battery to the total capacity of the battery, usually expressed as a percentage. For an electric vehicle battery with a SOC of 50%, it means that half of the power is left in the battery.

[0064] See also Figure 6 and Figure 7 As shown, Figure 6 A top view of the connection between the test vehicle and the lightning interference generating device provided in an embodiment of the present application, Figure 7A front view of the connection between the test vehicle and the lightning interference generating device provided in the embodiment of the present application. Taking the test vehicle 30 as a four-wheel vehicle and the tire metal component 311 as a tire bolt as an example, the current injection point of the test vehicle 30 is set to the highest metal position of the metal part of the vehicle shell, and the current outflow point is the tire bolt. Four tires are set at the four bypass positions of the four-wheel vehicle. The bolts of the four tires are connected to the conductor plate 141 of the conductive grounding plane through the output connection line 13. The four tires are grounded at the same time. The lightning interference generating device includes a current generator 11, an input connection line 12, an output connection line 13, an oscilloscope 15, a ground return line 21, a current probe 16, an insulator 17, a high-voltage terminal electrode 18, and a return line terminal electrode 19. The conductive grounding plane 14 includes a conductor plate 141 and an insulating support plate 142. The insulator 17 is located on the top of the test vehicle 30. The current generator 11 includes a high-voltage terminal electrode 18 and a return terminal electrode 19. The high-voltage terminal electrode 18 is connected to the insulator 17 through the input connection line 12. The return terminal electrode 19 is connected to the conductor plate 141 through the ground return line 21. The insulator 17 is connected to the test vehicle 30 through the connection line. The input connection line 12 can be understood as a large pulse application line. The output connection line 13 is fixed to the conductor plate 141 through a fixing member 143. The output connection line 13 is a braided line. The conductor plate 141 is isolated from the ground by an insulating support plate 142, and the insulating support plate can include insulating material. The current probe 16 is electrically connected to the oscilloscope 15.

[0065] Among them, the current generator 11 is used to generate current pulses, the input connection line 12 is used to transmit the generated current pulses to the test vehicle 30, the oscilloscope 15 is used to monitor the current pulses, the ground return line 21 is used to form a current loop to ensure that the current can flow through the test vehicle 30, and the current probe 16 is used to monitor the generated current waveform and transmit the current waveform to the oscilloscope 15. The insulator 17 is a hanging wire to ensure that the wire has no other position in contact with the test vehicle 30 to avoid affecting the test results. The conductor plate 141 is used to simulate the earth and receive the current flowing through the test vehicle. The insulating support plate 142 is used for insulation to prevent the current from flowing directly into the real earth. The high-voltage end electrode 18 is the positive electrode, and the return line end electrode 19 is the negative electrode.

[0066] The current generator 11 generates a current signal and transmits it to the test vehicle 30 through the high-voltage terminal electrode 18, the input connection line 12, and the insulator 17 in sequence. The metal component 311 of the tire 31 is connected to the conductor plate 141 through the output connection line 13, and flows out through the ground return line 21 and the return line terminal electrode 19. At the same time, the current pulse waveform is monitored by the current probe 16 and transmitted to the oscilloscope 15, thereby forming a loop to ensure that the current can flow through the test vehicle 30. The exposed metal at the end of the high-voltage terminal electrode 18 of the current generator 11 is not less than 50 mm away from the discharge position. A thin copper wire with a diameter of 0.2 mm can be connected between the discharge electrode and the discharge position as an induction lead to the lightning strike point of the vehicle. The return line end of the current generator 11 is connected to the conductor plate 141, so that a large current passes through the vehicle; the high-voltage copper braided wire is set up using the insulator 17 to ensure that it is higher than the ground wire, and then the current generator 11 is operated to perform multiple current pulse tests to output and record waveforms, which are displayed through the oscilloscope 15. During the test, the vehicle status information of the test vehicle under lightning interference is detected.

[0067] When the lightning effect test type is a lightning direct effect test type, detect whether the test vehicle has a fire phenomenon and whether the door is in a normal open state; when the lightning effect test type is a lightning indirect effect test type, detect whether the vehicle integrated system of the test vehicle is in a normal state. When the test vehicle does not have a fire phenomenon and the door is in a normal open state, the direct test result is determined to be a test pass; when the vehicle integrated system of the test vehicle is in a normal state, the indirect test result is determined to be a test pass; if both the direct test result and the indirect test result are test pass, the test result is determined to be a test pass.

[0068] The vehicle lightning effect test method provided in this embodiment connects the lightning interference generating device to the test vehicle through the input connection line, and connects the tire metal component to the conductive ground plane through the output connection line, which can simulate the real lightning environment, monitor the vehicle status information in real time, and test the vehicle's tolerance under extreme lightning conditions, including not only the physical damage of the vehicle body structure, but also the stability and functional integrity of the electrical system, so that the manufacturer can understand the specific performance of the vehicle after being struck by lightning, and ensure that the vehicle can still maintain basic functions and safety when encountering such extreme weather. And it can provide good data guidance information for subsequent vehicle product design and development, and can adjust the vehicle body structure, antenna position, circuit layout, etc. in time according to the test results to improve the vehicle's lightning resistance. For example, improve the vehicle's grounding system, strengthen the protection measures of key electronic modules, etc., to ensure that the vehicle is more reliable when facing lightning strikes.

[0069] On the other hand, please continue to see Figure 1As shown, the embodiment of the present application provides a vehicle lightning effect test system, which includes: a main control device 20 and a lightning interference generating device 10; the main control device 20 establishes a communication connection with the lightning interference generating device 10; The main control device 20 is used to: when the test vehicle 30 meets the test conditions, obtain the lightning effect test type and determine the lightning effect test parameters corresponding to the lightning effect test type; According to the lightning effect test parameters, the lightning interference generating device 10 is controlled to transmit a current signal to the test vehicle to generate lightning interference to the test vehicle 30; the electromagnetic immunity test is performed on the test vehicle 30, the vehicle state information of the test vehicle under lightning interference is detected, and the test result is obtained according to the vehicle state information; the test vehicle 30 is located on a conductive ground plane, the lightning interference generating device is connected to the test vehicle through an input connection line, and the tire metal component of the test vehicle is connected to the conductive ground plane through an output connection line; The lightning interference generating device 10 is used to transmit a current signal to a test vehicle to generate lightning interference to the test vehicle.

[0070] The vehicle lightning effect test system provided in this embodiment can quickly identify potential risk points of the vehicle through direct lightning strike tests and indirect lightning strike tests, and avoid them in time. By improving the lightning protection design of the vehicle and strengthening the anti-interference ability of the vehicle, the risk of failure caused by lightning is reduced, driving safety is improved, and data support and basis are provided for subsequent product development, further improving the market competitiveness of the product. At the same time, it can be applied to all lightning strike effect tests of vehicles, and its application scenarios are relatively wide.

[0071] Figure 8 FIG. 1 is a schematic diagram of the structure of a main control device provided by an embodiment of the present invention. Figure 8 As shown, it shows a structural schematic diagram of a main control device 20 suitable for implementing an embodiment of the present application.

[0072] like Figure 8 As shown, the main control device 20 includes a central processing unit (CPU) 401, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 402 or the program loaded from the storage part 408 to the random access memory (RAM) 403. In the RAM 403, various programs and data required for system operation are also stored. The CPU 401, the ROM 402, and the RAM 403 are connected to each other through a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0073] The following components are connected to the I / O interface 405: an input section 406 including a keyboard, a mouse, etc.; an output section 407 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 408 including a hard disk, etc.; and a communication section 409 including a network interface card such as a LAN card, a modem, etc. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to the I / O interface 405 as needed. A removable medium 411, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 410 as needed, so that a computer program read therefrom is installed into the storage section 408 as needed.

[0074] In particular, according to the embodiments of the present disclosure, the above reference Figure 3 The described processes may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program comprising a computer program for executing Figure 3 In such an embodiment, the computer program may be downloaded and installed from a network via the communication section 409 and / or installed from the removable medium 411.

[0075] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of the code, and the aforementioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0076] The units or modules involved in the embodiments described in this application may be implemented by software or hardware, and the units or modules described may also be set in a processor.

[0077] As another aspect, the present application also provides a computer-readable medium, which may be included in the processing device described in the above embodiment; or may exist independently without being assembled into the main control device. The above computer-readable medium carries one or more programs, and when the above one or more programs are executed by a main control device, the main control device implements the vehicle lightning effect test method described in the above embodiment.

[0078] As yet another aspect, the present application further provides a computer program product, including a computer program, which, when executed by a processor, implements the vehicle lightning effect testing method provided in the above embodiment.

[0079] For example, the main control device can be implemented as follows Figure 3 As shown in: Step S101, when the test vehicle meets the test conditions, obtain the lightning effect test type; the lightning effect test type includes a lightning direct effect test type and a lightning indirect effect test type; Step S102, determine the lightning effect test parameters corresponding to the lightning effect test type; Step S103, according to the lightning effect test parameters, control the lightning interference generating device to transmit a current signal to the test vehicle to generate lightning interference to the test vehicle; the test vehicle is located on a conductive ground plane, the lightning interference generating device is connected to the test vehicle through an input connection line, and the tire metal component of the test vehicle is connected to the conductive ground plane through an output connection line; Step S104, perform an electromagnetic immunity test on the test vehicle, detect the vehicle status information of the test vehicle under the lightning interference, and obtain the test result according to the vehicle status information. For another example, the main control device can also implement the following Figure 5 The steps shown in .

[0080] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be embodied.

[0081] In addition, although the steps of the method in the present disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc. Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware.

[0082] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A vehicle lightning effect testing method, characterized in that: The method includes: When the test vehicle meets the test conditions, a lightning effect test type is obtained; the lightning effect test type includes a lightning direct effect test type and a lightning indirect effect test type; Determining lightning effect test parameters corresponding to the lightning effect test type; According to the lightning effect test parameters, the lightning interference generating device is controlled to emit a current signal to the test vehicle to generate lightning interference to the test vehicle; the test vehicle is located on a conductive ground plane, the lightning interference generating device is connected to the test vehicle through an input connection line, the lightning interference generating device is connected to the conductive ground plane through a ground return line, and the tire metal component of the test vehicle is connected to the conductive ground plane through an output connection line; An electromagnetic immunity test is performed on the test vehicle, vehicle status information of the test vehicle under the lightning interference is detected, and a test result is obtained according to the vehicle status information.

2. The method according to claim 1, characterized in that Performing an electromagnetic immunity test on the test vehicle to detect vehicle status information of the test vehicle under the lightning interference includes: When the lightning effect test type is a lightning direct effect test type, detecting whether the test vehicle has a fire phenomenon and whether the door is in a normal open state; When the lightning effect test type is a lightning indirect effect test type, it is detected whether the vehicle integrated system of the test vehicle is in a normal state.

3. The method according to claim 2, characterized in that The test results include direct test results and indirect test results; According to the vehicle status information, a test result is obtained, including: When there is no fire in the test vehicle and the door is in a normally open state, determining that the direct test result is a test pass; When the vehicle integrated system of the test vehicle is in a normal state, determining the indirect test result as a test pass; If both the direct test result and the indirect test result are test passed, the test result is determined to be test passed.

4. The method according to claim 3, characterized in that According to the vehicle status information, a test result is obtained, including: When the test vehicle is on fire and / or the door is in an abnormally open state, determining that the direct test result is a test failure; When the vehicle integrated system of the test vehicle is in an abnormal state, determining the indirect test result as a test failure; If at least one of the direct test result and the indirect test result is a test failure, the test result is determined to be a test failure.

5. The method according to claim 3, characterized in that: Before transmitting a current signal to the test vehicle to generate lightning interference to the test vehicle, the method further includes: checking whether the test vehicle is in an unloaded mode; When in the no-load mode, the test vehicle is controlled to be in a powered-on state and the power source of the test vehicle is in a powered-off state.

6. The method according to claim 1, characterized in that According to the lightning effect test parameters, controlling the lightning interference generating device to transmit a current signal to the test vehicle to generate lightning interference to the test vehicle includes: According to the lightning effect test parameters, controlling the lightning interference generating device to perform parameter configuration; When the parameter configuration is completed, the current generator in the lightning interference generating device is controlled to transmit the current signal to the test vehicle through the input connection line, and flow out to the reference ground plane through the output connection line to generate lightning interference to the test vehicle.

7. The method according to claim 1, characterized in that Before obtaining the lightning effect test type, the method further includes: The lightning interference generating device is calibrated to ensure that the lightning interference generating device is in a normal working state.

8. A vehicle lightning effect test system, characterized in that: include: A main control device and a lightning interference generating device; the main control device establishes a communication connection with the lightning interference generating device; The main control device is used to: when the test vehicle meets the test conditions, obtain the lightning effect test type and determine the lightning effect test parameters corresponding to the lightning effect test type; According to the lightning effect test parameters, controlling the lightning interference generating device to transmit a current signal to the test vehicle to generate lightning interference to the test vehicle; An electromagnetic immunity test is performed on the test vehicle, vehicle status information of the test vehicle under the lightning interference is detected, and a test result is obtained according to the vehicle status information; the test vehicle is located on a conductive ground plane, the lightning interference generating device is connected to the test vehicle via an input connecting line, the lightning interference generating device is connected to the conductive ground plane via a ground return line, and a tire metal component of the test vehicle is connected to the conductive ground plane via an output connecting line; The lightning interference generating device is used to transmit a current signal to the test vehicle to generate lightning interference to the test vehicle.

9. A main control device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the vehicle lightning effect testing method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the vehicle lightning effect testing method according to any one of claims 1 to 7 is implemented.

Images