Complete vehicle electromagnetic compatibility design method, device, equipment and medium

Abstract

The invention relates to the technical field of whole vehicle electromagnetic compatibility design, in particular to a whole vehicle electromagnetic compatibility design method, device and equipment and a medium. Preliminary design, arrangement and planning of parts and whole vehicle wire harnesses of the whole vehicle electronic and electrical parts are completed; building a test scene of a vehicle rack or a body-in-white according to the planned arrangement design; starting an electronic appliance; selecting a plurality of test positions according to the arrangement of the parts; sequentially placing the directional antenna at a plurality of test positions for testing, and recording test data; when the test result of any test position exceeds the judgment criterion, it is regarded that an electromagnetic risk exists; and the electromagnetic risk is rectified until the electromagnetic compatibility design of the whole vehicle is completed. According to the invention, EMC vehicle arrangement is introduced into quantifiable risk analysis from empirical evaluation; the whole vehicle design arrangement risk is preposed, and the later change risk is saved; the electromagnetic compatibility risk which cannot be identified in the deep-level use process is reduced to a certain extent; and the test cost and human resource investment of research and development laboratories are saved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electromagnetic compatibility design of a whole vehicle, and in particular to a method, device, equipment and medium for electromagnetic compatibility design of a whole vehicle. Background Art

[0002] With the progress of society and the extreme popularity of electrical equipment, the rapid deterioration of the electromagnetic environment in space has put forward more stringent EMC design requirements for our electrical equipment.

[0003] As the most widespread and complex means of transportation, cars have inherited countless electronic and electrical components, and the electromagnetic environment is extremely complex. This also puts higher requirements on our vehicle EMC electromagnetic compatibility design, especially new energy vehicles.

[0004] With the intensification of market competition, the development cycle of vehicles is generally shortened. How to effectively complete the design and performance evaluation of vehicle EMC within a certain development cycle has become an increasingly serious problem. At present, the common method is to conduct EMC experiments and performance tests in the laboratory after the vehicle design is completed to evaluate the quality of the vehicle's EMC environment.

[0005] Existing technologies ignore the design itself and are always in a patching process, lacking a pre-emptive means that can truly play a guiding role in the design process. In the layout design stage, it is possible to identify the interference between components and wiring harnesses, adjust components and layout in time, greatly save the design and later verification cycle, and save ineffective manpower and material investment.

[0006] In summary, there is an urgent need for a vehicle EMC design solution based on directional antennas. Summary of the invention

[0007] In view of the above problems, the present disclosure provides a vehicle electromagnetic compatibility design method, device, equipment and medium, which are used to solve the problem of electromagnetic risk assessment of the layout position during the vehicle layout stage.

[0008] In a first aspect, a vehicle electromagnetic compatibility design method is provided, the method comprising:

[0009] Complete the preliminary design and layout planning of vehicle electronic and electrical components and vehicle wiring harnesses according to the requirements of electromagnetic compatibility (EMC) design theory;

[0010] Build the vehicle test bench or body-in-white test scene according to the planned layout design;

[0011] The vehicle or test bench is powered on, and all the electronic appliances are started;

[0012] Selecting a number of test positions according to the arrangement of components, wherein the test positions cover the position area of ​​the arrangement of components;

[0013] Place the directional antenna in several test positions in turn for testing and record the test data;

[0014] When the test result of any test location exceeds the evaluation criteria, it is considered that there is an electromagnetic risk;

[0015] Rectify the electromagnetic risks until the electromagnetic compatibility design of the entire vehicle is completed.

[0016] Furthermore, the judging criteria include:

[0017] According to the design and development requirements and the electromagnetic compatibility acceptance conditions of each host manufacturer's parts, the acceptance criteria for radiated emission and radiated immunity are analyzed, and 70% of the acceptance criteria are used as the judgment standard for the electromagnetic risk measured by the directional antenna; when the test value exceeds 70%, it is considered that there is an electromagnetic risk at this location.

[0018] Furthermore, the test scene of the vehicle test bench or body in white is built according to the planned layout design, including:

[0019] Conducted in an anechoic chamber.

[0020] Furthermore, all the electronic devices installed are started, including:

[0021] The operating power of all arranged electronics shall not be less than 70% of the designed rated power and shall be maintained in operation for more than 10 minutes before testing.

[0022] Further, several test locations are selected according to the component layout, including:

[0023] The parts have 6 positions: front, back, up, down, left, and right.

[0024] Furthermore, the directional antenna is placed in several test positions in turn for testing and the test data is recorded, including:

[0025] Place the directional antenna in the front, back, top, bottom, left, and right directions of the component and test them in turn. Keep the test at each position for more than 3 minutes and save the frequency domain spectrum of the test.

[0026] Furthermore, the electromagnetic risks are rectified until the electromagnetic compatibility design of the whole vehicle is completed, including:

[0027] For locations with electromagnetic risks, reselect locations, perform electromagnetic shielding at the locations, and / or find the interference source and rectify it.

[0028] Re-select the location, perform electromagnetic shielding, and / or rectify the disturbance source and then re-test until the test result does not exceed the judgment standard.

[0029] In a second aspect, a whole vehicle electromagnetic compatibility design device includes: a preliminary design unit, a test environment construction unit, a test unit and a rectification unit;

[0030] The preliminary design unit is used to complete the preliminary design and layout planning of the vehicle's electronic and electrical components and vehicle wiring harnesses according to the requirements of electromagnetic compatibility (EMC) design theory;

[0031] The test environment construction unit is used to build the test scene of the vehicle test bench or body-in-white according to the planned layout design;

[0032] The test unit is used to power on the vehicle or test bench, and all the arranged electronic appliances are started; a number of test positions are selected according to the arrangement of the components, wherein the test positions cover the position area where the components are arranged; the directional antenna is placed in a number of test positions in turn for testing and the test data is recorded;

[0033] The rectification unit is used to determine if an electromagnetic risk exists when the test result at any test location exceeds the evaluation criteria; the electromagnetic risk is rectified until the electromagnetic compatibility design of the entire vehicle is completed.

[0034] In a third aspect, an electronic device includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus;

[0035] a memory storing a computer program;

[0036] The processor is used to implement the above-mentioned electromagnetic compatibility design method for a whole vehicle when executing the computer program stored in the memory.

[0037] In a fourth aspect, a computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned electromagnetic compatibility design method for a whole vehicle is implemented.

[0038] The present disclosure at least includes the following beneficial effects:

[0039] The present disclosure introduces the EMC vehicle layout from traditional empirical evaluation to quantifiable risk analysis, so that the vehicle EMC layout has a basis to rely on.

[0040] Traditionally, after the whole vehicle is laid out, it is necessary to wait until the whole vehicle is produced and then test it in a standard laboratory to assess the risk. Once a risk occurs, the early layout work will face the risk of being scrapped and started over again. Therefore, it is very necessary to carry out advance risk testing in the layout stage, which greatly reduces the later risks.

[0041] In addition to meeting the corresponding regulatory requirements in the laboratory stage, the design risk investigation of electromagnetic compatibility is also to minimize some unknown and deep-level electromagnetic compatibility risks caused by electromagnetic compatibility during the actual use of customers.

[0042] If EMC electromagnetic compatibility problems arise during the vehicle stage, it will be not only time-consuming and laborious to investigate, but also difficult to rectify. It may require the redesign of hardware and the re-release of vehicle data, which greatly restricts the development and implementation of the vehicle project. Therefore, conducting risk identification during the vehicle layout stage can greatly save the risk costs of later projects.

[0043] Other features and advantages of the present disclosure will be described in the following description, and partly become apparent from the description, or be understood by implementing the present disclosure. The purpose and other advantages of the present disclosure can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 A schematic diagram of a design method flow chart for an embodiment of the present disclosure;

[0046] Figure 2 A schematic diagram of the structure of a device designed for an embodiment of the present disclosure;

[0047] Figure 3 It is a schematic diagram of the structure of an electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0049] like Figure 1 As shown, a vehicle electromagnetic compatibility design method, the method comprising:

[0050] S101, complete the preliminary design and layout planning of vehicle electronic and electrical components and vehicle wiring harnesses according to the requirements of electromagnetic compatibility (EMC) design theory;

[0051] S102, constructing a test scene of a vehicle test bench or body-in-white according to the planned layout design;

[0052] S103, the vehicle or test bench is powered on, and all the electronic appliances are started;

[0053] S104, selecting a number of test positions according to the arrangement of components, wherein the test positions cover the position area where the components are arranged;

[0054] S105, placing the directional antenna in a number of test positions in sequence for testing and recording the test data;

[0055] S106: When the test result of any test position exceeds the evaluation criteria, it is considered that there is an electromagnetic risk;

[0056] S107, rectify the electromagnetic risks until the electromagnetic compatibility design of the whole vehicle is completed.

[0057] The specific implementation is as follows:

[0058] Vehicle safety is the most important in the design and development stage. Effective and reasonable selection of component locations and accurate wiring harness layout are important means to reduce electromagnetic interference failures within the vehicle. By optimizing the in-vehicle layout, it is not only possible to reduce the interference of components, but also to prevent interference in the vehicle signal transmission process, and to reduce and shorten component development costs, giving the vehicle a greater cost advantage.

[0059] During the vehicle development phase of vehicle component distribution and wiring harness layout:

[0060] Equipment used: Handheld directional antenna, frequency range from 9KHz to 26.5GHz;

[0061] Environmental requirements: anechoic chamber / shielded room;

[0062] Vehicle requirements: vehicle test bench or body in white;

[0063] Constructing the judging criteria:

[0064] According to the design and development requirements and the electromagnetic compatibility acceptance conditions of the components of each host manufacturer, the acceptance criteria of the radiation emission and radiation immunity of the acceptance clauses are analyzed, and 70% of the acceptance criteria is used as the evaluation basis for the interference measured by the directional antenna. If the test value is lower than 70%, it is considered that the location has low risk, and if the test value exceeds 70%, it is considered that there is an electromagnetic risk at the location, and other locations should be selected for layout;

[0065] Components and wiring harness layout design:

[0066] Complete the preliminary design and layout planning of vehicle electronic and electrical components and vehicle wiring harnesses according to the requirements of EMC design theory. Reasonable layout planning can avoid coupling interference between wiring harnesses;

[0067] Test bench / body-in-white layout:

[0068] Build the vehicle test bench or body-in-white test scene according to the planned layout design;

[0069] Test site selection:

[0070] The test should be conducted in an anechoic chamber to avoid metal reflection and data deviation introduced by the external environment;

[0071] Test location selection:

[0072] The test bench should be divided into 30cm*30cm areas. The test positions should cover the area where the components are arranged. The six positions of the position, front, back, top, bottom, left, and right, should be measured separately.

[0073] Stable operation:

[0074] When the vehicle / test bench is powered on, all the arranged electronics should be started, and the operating power should not be less than 70% of the design rated power. To ensure the operating stability, it should be kept running for more than 10 minutes before the test;

[0075] Select a test location:

[0076] Select the position to be tested according to the arrangement of components, and place the directional antenna in the front, back, top, bottom, left, and right directions of the component for testing in sequence. Each position should be tested for more than 3 minutes, and the frequency domain spectrum of the test should be saved.

[0077] Data Analysis:

[0078] Record the test data of each point. The six-direction data of each point must be compared with the evaluation criteria. If the test result of any direction exceeds the evaluation criteria, it is considered that there is an electromagnetic risk;

[0079] For locations with electromagnetic risks, it is necessary to reselect the location or implement an electromagnetic shielding solution at the location, find the interference source, and rectify the interference source;

[0080] like Figure 2 As shown, a vehicle electromagnetic compatibility design device includes: a preliminary design unit 201, a test environment construction unit 202, a test unit 203 and a rectification unit 204;

[0081] The preliminary design unit 201 is used to complete the preliminary design layout planning of the electronic and electrical components of the vehicle and the wiring harness of the vehicle according to the requirements of electromagnetic compatibility (EMC) design theory;

[0082] A test environment construction unit 202 is used to construct a test scene of a vehicle test bench or a body-in-white according to a planned layout design;

[0083] The test unit 203 is used to power on the vehicle or the test bench, and all the arranged electronic appliances are started; select a number of test positions according to the arrangement of components, wherein the test positions cover the position area where the components are arranged; place the directional antennas in turn at the several test positions for testing and record the test data;

[0084] The rectification unit 204 is used to regard the electromagnetic risk as existing when the test result of any test position exceeds the evaluation standard; and rectify the electromagnetic risk until the electromagnetic compatibility design of the whole vehicle is completed.

[0085] The specific implementation is as follows:

[0086] According to the component test standards of each host manufacturer, 70% of the standard requirements is used as the evaluation basis for the interference measured by the directional antenna;

[0087] Complete the preliminary design of components and vehicle wiring harness layout according to EMC theory requirements;

[0088] Build the vehicle bench or body-in-white test scene according to the layout design;

[0089] The test should place the directional antenna at the location to be evaluated, and the six positions of the location, front, back, top, bottom, left, and right, should be measured respectively;

[0090] The vehicle operating conditions should maximize the power of each electrical appliance;

[0091] If the measurement results at any location exceed the assessment requirements, it is considered that there is a risk and it is necessary to reselect the location and find the source of interference and rectify the interference source.

[0092] This disclosure introduces EMC vehicle layout from empirical evaluation to quantifiable risk analysis; it front-ends the risk of vehicle design layout to save the risk of later changes; it reduces the electromagnetic compatibility risks that cannot be identified during in-depth use to a certain extent; and it saves R&D laboratory testing costs and human resource investment.

[0093] like Figure 3 As shown, the present disclosure provides an electronic device, including a processor 301, a communication interface 302, a memory 303 and a communication bus 304, wherein the processor 301, the communication interface 302 and the memory 303 communicate with each other through the communication bus 304;

[0094] Memory 303, storing computer programs;

[0095] The processor 301 is configured to implement the above method when executing the computer program stored in the memory 303 .

[0096] The present disclosure provides a computer-readable storage medium storing a computer program, wherein the computer program implements the above method when executed by a processor.

[0097] The computer-readable storage medium may be included in the device / apparatus described in the above embodiment; or it may exist independently without being assembled into the device / apparatus. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present disclosure is implemented.

[0098] According to an embodiment of the present disclosure, a computer-readable storage medium may be a non-volatile computer-readable storage medium, for example, may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0099] Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A vehicle electromagnetic compatibility design method, characterized in that: The method comprises: Complete the preliminary design and layout planning of vehicle electronic and electrical components and vehicle wiring harnesses according to the requirements of electromagnetic compatibility (EMC) design theory; Build the vehicle test bench or body-in-white test scene according to the planned layout design; The vehicle or test bench is powered on, and all the electronic appliances are started; Selecting a number of test positions according to the arrangement of components, wherein the test positions cover the position area of ​​the arrangement of components; Place the directional antenna in several test positions in turn for testing and record the test data; When the test result of any test location exceeds the evaluation criteria, it is considered that there is an electromagnetic risk; Rectify the electromagnetic risks until the electromagnetic compatibility design of the entire vehicle is completed.

2. A vehicle electromagnetic compatibility design method according to claim 1, characterized in that: Judging criteria include: According to the design and development requirements and the electromagnetic compatibility acceptance conditions of each host manufacturer's parts, the acceptance criteria for radiated emission and radiated immunity are analyzed, and 70% of the acceptance criteria are used as the judgment standard for the electromagnetic risk measured by the directional antenna; when the test value exceeds 70%, it is considered that there is an electromagnetic risk at this location.

3. The electromagnetic compatibility design method for a whole vehicle according to claim 1, characterized in that: The test scene of the vehicle test bench or body in white is built according to the planned layout design, including: Conducted in an anechoic chamber.

4. The electromagnetic compatibility design method for a whole vehicle according to claim 1, characterized in that: All electronic devices are started, including: The operating power of all arranged electronics shall not be less than 70% of the designed rated power and shall be maintained in operation for more than 10 minutes before testing.

5. The electromagnetic compatibility design method for a whole vehicle according to claim 1, characterized in that: Several test locations are selected based on component layout, including: The parts have 6 positions: front, back, up, down, left, and right.

6. The electromagnetic compatibility design method for a whole vehicle according to claim 1, characterized in that: Place the directional antenna in several test positions in turn to test and record the test data, including: Place the directional antenna in the front, back, top, bottom, left, and right directions of the component and test them in turn. Keep the test at each position for more than 3 minutes and save the frequency domain spectrum of the test.

7. The electromagnetic compatibility design method for a whole vehicle according to claim 1, characterized in that: Rectify the electromagnetic risks until the electromagnetic compatibility design of the whole vehicle is completed, including: For locations with electromagnetic risks, reselect locations, perform electromagnetic shielding at the locations, and / or find the interference source and rectify it. Re-select the location, perform electromagnetic shielding, and / or rectify the disturbance source and then re-test until the test result does not exceed the judgment standard.

8. A vehicle electromagnetic compatibility design device, characterized in that: include: Preliminary design unit, test environment construction unit, test unit and rectification unit; The preliminary design unit is used to complete the preliminary design and layout planning of the vehicle's electronic and electrical components and vehicle wiring harnesses according to the requirements of electromagnetic compatibility (EMC) design theory; The test environment construction unit is used to build the test scene of the vehicle test bench or body-in-white according to the planned layout design; The test unit is used to power on the vehicle or test bench, and all the arranged electronic appliances are started; a number of test positions are selected according to the arrangement of the components, wherein the test positions cover the position area where the components are arranged; the directional antenna is placed in a number of test positions in turn for testing and the test data is recorded; The rectification unit is used to determine if an electromagnetic risk exists when the test result at any test location exceeds the evaluation criteria; the electromagnetic risk is rectified until the electromagnetic compatibility design of the entire vehicle is completed.

9. An electronic device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; a memory storing a computer program; The processor is used to implement a vehicle electromagnetic compatibility design method as described in any one of claims 1 to 7 when executing a computer program stored in a memory.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, a vehicle electromagnetic compatibility design method according to any one of claims 1 to 7 is implemented.

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