Vehicle frequency domain evaluation method and device, electronic equipment and storage medium

Abstract

The invention relates to the technical field of magnetic variable measurement, in particular to a vehicle frequency domain evaluation method and device, electronic equipment and a storage medium, and the method comprises the steps: controlling a test vehicle to execute a corresponding magnetic field radiation test in a test scene meeting a preset condition, so as to collect a magnetic field radiation signal under various driving scenes, testing the test data of the magnetic field radiation test of the target point location of the vehicle; extracting a peak value of the test data, and screening actual magnetic induction intensity from the test data based on the peak value; and in combination with the actual magnetic induction intensity and a preset electromagnetic induction intensity limit value, obtaining frequency domain evaluation results of the target point location in the multiple test scenes, so as to obtain a comprehensive frequency domain evaluation result of the test vehicle based on the frequency domain evaluation results of the target point location in the multiple test scenes. Therefore, the technical problem that the evaluation result is too conservative and cannot truly reflect the overall electromagnetic emission characteristics of the equipment due to the fact that the worst situation of a single frequency point affects the overall evaluation in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measuring magnetic variables, and in particular to a frequency domain evaluation method and device for a vehicle, an electronic device and a storage medium. BACKGROUND

[0002] In related technologies, a core defect of frequency domain evaluation is that the worst case of a single frequency point affects the overall evaluation, and the comprehensive radiation level of the measured device in the entire frequency band cannot be scientifically and comprehensively reflected.

[0003] As shown in FIG. 1, although the radiation intensity of Figures 1 to 3 (the minimum margin 29.9 dB) is higher than that of Figure 1 (the minimum margin 27.5 dB) at most frequencies in the entire frequency band, the test evaluation result of Figure 2 is even worse than that of Figure 2 , as shown in FIG. 2, only because the radiation peak value at a certain frequency point is higher than that of Figure 1 . Figure 3 Figure 2 This evaluation method may cause the evaluation result to be too conservative and cannot truly reflect the overall electromagnetic emission characteristics of the device, and needs to be improved. Figure 1 SUMMARY

[0004] The present application provides a frequency domain evaluation method and device for a vehicle, an electronic device and a storage medium, to solve the technical problem in related technologies that the worst case of a single frequency point affects the overall evaluation, resulting in an evaluation result that is too conservative and cannot truly reflect the overall electromagnetic emission characteristics of the device. SUMMARY

[0005] The present application provides a frequency domain evaluation method and device for a vehicle, an electronic device and a storage medium, to solve the technical problem in related technologies that the worst case of a single frequency point affects the overall evaluation, resulting in an evaluation result that is too conservative and cannot truly reflect the overall electromagnetic emission characteristics of the device.

[0006] The first aspect of the present application provides a frequency domain evaluation method for a vehicle, comprising the following steps: in a test scene meeting a preset condition, controlling a test vehicle to perform a corresponding magnetic field radiation test to collect test data of a magnetic field radiation test of a target point of the test vehicle under a plurality of driving scenes; extracting a peak value of the test data, and filtering out an actual magnetic induction intensity from the test data based on the peak value; combining the actual magnetic induction intensity and a preset electromagnetic induction intensity limit value to obtain a frequency domain evaluation result of the target point under the plurality of test scenes, and obtaining a comprehensive frequency domain evaluation result of the test vehicle based on the frequency domain evaluation result of the target point under the plurality of test scenes.

[0007] ​Optionally, in an embodiment of the present application, the filtering the actual magnetic induction intensity from the test data based on the peak value comprises: filtering target data from the test data based on a preset filtering condition; determining a frequency point corresponding to the peak value in the target data to delete the frequency point from the target data to obtain the actual magnetic induction intensity.

[0008] Optionally, in an embodiment of the present application, the filtering the actual magnetic induction intensity from the test data based on the peak value comprises: obtaining an inherent frequency point of a test device; filtering magnetic induction intensity data with a frequency point value greater than the inherent frequency point from the target data as the actual magnetic induction intensity.

[0009] Optionally, in an embodiment of the present application, the combining the actual magnetic induction intensity and a preset electromagnetic induction intensity limit value to obtain the frequency domain evaluation result of the target point in the multiple test scenarios, and obtaining the comprehensive frequency domain evaluation result of the test vehicle based on the frequency domain evaluation result of the target point in the multiple test scenarios comprises: calculating a corresponding magnetic induction intensity value based on the actual magnetic induction intensity and a voltage value obtained by the magnetic field radiation test; calculating a full-band comprehensive energy value by using the magnetic induction intensity value, and combining the full-band comprehensive energy value and the preset electromagnetic induction intensity limit value to perform frequency domain evaluation on the test vehicle.

[0010] Optionally, in an embodiment of the present application, the calculation expression of the full-band comprehensive energy value is: , wherein, B represents the full-band comprehensive energy value, Bj represents a magnetic induction intensity value of a jth frequency on a measurement spectrum, Bj represents a preset electromagnetic induction intensity limit value of the jth frequency.

[0011] An embodiment of the second aspect of the present application provides a frequency domain evaluation device of a vehicle, comprising: a test module configured to control a test vehicle to perform a corresponding magnetic field radiation test in a test scenario satisfying a preset condition to collect test data of a magnetic field radiation test of a target point of the test vehicle in multiple driving scenarios; a filtering module configured to extract a peak value of the test data and filter an actual magnetic induction intensity from the test data based on the peak value; and an evaluation module configured to combine the actual magnetic induction intensity and a preset electromagnetic induction intensity limit value to obtain a frequency domain evaluation result of the target point in the multiple test scenarios, and obtain a comprehensive frequency domain evaluation result of the test vehicle based on the frequency domain evaluation result of the target point in the multiple test scenarios.

[0012] Optionally, in an embodiment of the present application, the screening module comprises: a first screening unit configured to screen target data from the test data based on a preset screening condition; and a determination unit configured to determine a frequency point corresponding to the peak value in the target data, delete the frequency point from the target data, and obtain the actual magnetic induction intensity.

[0013] Optionally, in an embodiment of the present application, the screening module comprises: an acquisition unit configured to acquire an inherent frequency point of a test device; and a second screening unit configured to screen magnetic induction intensity data with a frequency point value greater than the inherent frequency point from the target data as the actual magnetic induction intensity.

[0014] Optionally, in an embodiment of the present application, the evaluation module comprises: a comparison unit configured to calculate a corresponding magnetic induction intensity value based on the actual magnetic induction intensity and a voltage value obtained by the magnetic field radiation test; and a calculation unit configured to calculate a full-band comprehensive energy value by using the magnetic induction intensity value, and perform frequency domain evaluation on the test vehicle by combining the full-band comprehensive energy value and the preset electromagnetic induction intensity limit value.

[0015] Optionally, in an embodiment of the present application, the calculation expression of the full-band comprehensive energy value is: , wherein, B represents the full-band comprehensive energy value, Bj represents a magnetic induction intensity value of a jth frequency on a measurement spectrum, Bj represents a preset electromagnetic induction intensity limit value of the jth frequency.

[0016] The third aspect embodiment of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the frequency domain evaluation method of the vehicle as described in the above embodiments.

[0017] The fourth aspect embodiment of the present application provides a computer readable storage medium, which stores computer instructions for making the computer execute the frequency domain evaluation method of the vehicle as described in the above embodiments.

[0018] The fifth aspect embodiment of the present application provides a computer program product comprising a computer program, which, when executed, is configured to implement the frequency domain evaluation method of the vehicle as described above.

[0019] The embodiment of the present application can first test the obtained magnetic field radiation test data, and screen the test data to pass the automatically extracted peak value for the magnetic induction intensity data for evaluation, so as to avoid the highlight influence of a single frequency point on the overall evaluation, and then evaluate the test vehicle according to the actual magnetic induction intensity and the comprehensive intensity, so as to realize automatic data processing and evaluation, improve the data processing speed, and help to reduce the overall radiation level, rather than only the radiation value of a certain frequency point. Thus, the technical problem that the worst case of a single frequency point affects the overall evaluation in the related art, resulting in that the evaluation result is too conservative and cannot truly reflect the overall electromagnetic emission characteristics of the equipment is solved.

[0020] Additional aspects and advantages of the present application will be set forth in part in the description which follows, and in part will become apparent to those having ordinary skill in the art upon examination of the following or can be learned from practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which: Figure 1 The schematic diagram of the frequency domain evaluation principle of the minimum margin of 29.9dB in the related art; Figure 2 The schematic diagram of the frequency domain evaluation principle of the minimum margin of 27.5dB in the related art; Figure 3 The contrast schematic diagram of the frequency domain evaluation in the related art; Figure 4 The flow chart of the frequency domain evaluation method of a vehicle provided according to the embodiment of the present application; Figure 5 The schematic diagram of the signal screening principle provided according to one embodiment of the present application; Figure 6 The schematic diagram of the device inherent frequency point value test principle provided according to one embodiment of the present application; Figure 7 The structural schematic diagram of the frequency domain evaluation device of a vehicle provided according to the embodiment of the present application; Figure 8 The structural schematic diagram of the electronic device provided according to the embodiment of the present application. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0023] A vehicle frequency domain evaluation method, device, electronic equipment and storage medium are described below with reference to the accompanying drawings. In view of the technical problems in the related art that the worst case of a single frequency point affects the overall evaluation, resulting in an overly conservative evaluation result and an inability to truly reflect the overall electromagnetic emission characteristics of the device, the present application provides a vehicle frequency domain evaluation method. In this method, the test data obtained from the magnetic field radiation test can be first screened to extract the peak value for evaluation of the magnetic induction intensity data to avoid the prominent influence of a single frequency point on the overall evaluation. Then, the test vehicle is evaluated according to the actual magnetic induction intensity and the comprehensive intensity, which realizes automatic data processing and evaluation, improves the data processing speed, and helps to reduce the overall radiation level, rather than just the radiation value of a certain frequency point. Thus, the technical problems in the related art that the worst case of a single frequency point affects the overall evaluation, resulting in an overly conservative evaluation result and an inability to truly reflect the overall electromagnetic emission characteristics of the device are solved.

[0024] Specifically, Figure 4 A flowchart of a vehicle frequency domain evaluation method provided by an embodiment of the present application is shown.

[0025] As Figure 4 shown, the vehicle frequency domain evaluation method includes the following steps: In step S401, in a test scenario that meets a preset condition, a test vehicle is controlled to perform a corresponding magnetic field radiation test to collect test data of a magnetic field radiation test of a target point of the test vehicle under a plurality of driving scenarios.

[0026] It can be understood that the magnetic field radiation test of the vehicle has extremely strict requirements on the test environment. The core goal is to create a pure, known, and controllable electromagnetic environment to ensure that the measured magnetic field signal comes entirely from the test vehicle (or its components) and not from external interference or other irrelevant factors.

[0027] The vehicle magnetic field radiation test is usually performed in an anechoic chamber. Depending on the test object, different test environments can be used in the embodiments of the present application.

[0028] For example, a whole vehicle anechoic chamber is a large shielded room with walls, ceilings, and floors large enough to accommodate a whole vehicle, all lined with wave-absorbing materials, to form a Faraday cage that completely isolates the external environment from electromagnetic interference (such as radio broadcasts, mobile phone signals, power grid interference, etc.), ensuring that the test is not affected by external factors.

[0029] The interior can be lined with wave-absorbing materials to absorb electromagnetic waves and prevent electromagnetic waves from reflecting back and forth inside the room to form multipath interference, simulating a reflection-free "free space" environment to ensure that the antenna receives only the direct wave emitted by the vehicle.

[0030] For example, a component anechoic chamber is used to test single electronic components of a vehicle, such as a motor, a controller, a DC-DC converter, etc., which also needs to have perfect shielding and wave absorbing functions, but the structure size can be smaller than that of the whole vehicle anechoic chamber.

[0031] Further, when performing the magnetic field radiation test, the embodiment of the present application can first perform preparation of the test vehicle, wherein the test vehicle is usually empty, but the fuel tank / battery should be at a certain proportion (such as more than 90%) of the rated capacity, all liquids (engine oil, coolant) are at the standard liquid level; adjusted to the standard value; all vehicle electrical appliances that can normally work (such as lights, air conditioners, sound, wipers, etc.) should be in the off state, unless the test plan has special requirements; the vehicle doors, covers (engine cover, trunk cover) should be closed.

[0032] Secondly, according to the test purpose, the embodiment of the present application can set the working mode of the vehicle. For example, a static working mode in which the vehicle is powered on but not driven; a driving working mode in which the vehicle runs at a constant speed on a rotating drum; a working mode of sudden acceleration, regenerative braking, charging mode, etc.

[0033] Then, the test equipment is calibrated and arranged, for example, the magnetic field probe is positioned; the probe is fixed; the measurement receiver is connected, etc.

[0034] Finally, the vehicle magnetic field radiation test is performed. In the case that the vehicle is not powered on and not running, start all test equipment (including the rotating drum, the cooling fan). Use the measurement receiver to scan in the full frequency band to confirm that the electromagnetic noise in the environment is at least 6dB (usually more than 10dB) lower than the expected measurement value. If the background noise is too high, the test is invalid and the interference source needs to be checked.

[0035] Start the vehicle and make it enter the preset working mode (such as static, uniform speed driving). Repeat the scanning measurement under various working conditions of the vehicle to obtain test data to comprehensively evaluate the magnetic field radiation characteristics.

[0036] Based on the above test environment, the test method of the embodiment of the present application can include: 1) The magnetic field measurement equipment simulation output port is connected with the spectrum analysis equipment through a shielding cable. During the test, since the magnetic field probe is a three-axis omnidirectional probe, there will be three channels of voltage signal data in the frequency domain; 2) The mean square value of each frequency point of the three channels is calculated to obtain the comprehensive voltage value of each frequency point; 3) The magnetic induction intensity value of each frequency point, i.e. the test data, is obtained according to the conversion relationship between the voltage value and the magnetic induction intensity.

[0037] In step S402, the peak value of the test data is extracted, and the actual magnetic induction intensity is selected from the test data based on the peak value.

[0038] As a possible implementation manner, the embodiment of the present application performs frequency point screening on the frequency domain test value, finds out the peak value, and filters out the influence of the environmental noise according to the peak value to obtain the actual magnetic induction intensity.

[0039] Optionally, in an embodiment of the present application, the actual magnetic induction intensity is screened from the test data based on the peak value, comprising: screening target data from the test data based on a preset screening condition; determining the frequency point corresponding to the peak value in the target data to delete the frequency point from the target data to obtain the actual magnetic induction intensity.

[0040] In the embodiment of the present application, the test data can be filtered to screen useful signals and eliminate invalid data segments caused by test environment, equipment or operation errors. The spectrum of formal test can be compared with the previously measured background noise spectrum to filter the background noise and ensure that the measured signal is indeed from the vehicle rather than environmental interference. Then, the embodiment of the present application can also check the abnormal mutation, breakpoint or saturation value (for example, receiver range overrun) of the data curve, eliminate data segments caused by factors such as loose probe connection, power interruption, vehicle not running in the predetermined working condition, etc., and ensure the integrity and correctness of the data.

[0041] Optionally, in an embodiment of the present application, the actual magnetic induction intensity is screened from the test data based on the peak value, comprising: obtaining the inherent frequency point of the test equipment; and screening the magnetic induction intensity data with a frequency point value greater than the inherent frequency point from the target data as the actual magnetic induction intensity.

[0042] Further, the embodiment of the present application can eliminate the inherent frequency point in the test equipment, that is, test the noise floor of the test equipment in a darkroom and record the margin value of each frequency point noise floor, and then select the data higher than the noise floor value from the screened effective data as the value of actual signal emission, that is, the actual magnetic induction intensity.

[0043] In step S403, the actual magnetic induction intensity and the preset electromagnetic induction intensity limit value are combined to obtain the frequency domain evaluation result of the target point in multiple test scenes, so as to obtain the comprehensive frequency domain evaluation result of the test vehicle based on the frequency domain evaluation result of the target point in multiple test scenes.

[0044] In some embodiments, the embodiment of the present application can adopt an isotropic magnetic field probe, connect the analog output port with a device having a frequency domain analysis function, test to obtain a voltage value, and then calculate a magnetic induction intensity value based on the corresponding relationship between the voltage value and the magnetic induction intensity. On this basis, the embodiment of the present application can obtain a frequency domain evaluation result of a target point in multiple test scenarios in combination with the actual magnetic induction intensity and a preset electromagnetic induction intensity limit value, obtain a comprehensive frequency domain evaluation result of the test vehicle based on the frequency domain evaluation result of the target point in the multiple test scenarios, and if all test frequencies are lower than the limit value, the test result is qualified, and the comprehensive energy value Wn of the full frequency band is <1; if a certain frequency value is higher than the limit value, the test result is unqualified, and the comprehensive energy value Wn of the full frequency band is >1. At this time, the radiation source needs to be positioned for rectification and optimization and then measured again to verify whether it meets the requirements.

[0045] Optionally, in an embodiment of the present application, the frequency domain evaluation result of the target point in the multiple test scenarios is obtained in combination with the actual magnetic induction intensity and the preset electromagnetic induction intensity limit value, and the comprehensive frequency domain evaluation result of the test vehicle is obtained based on the frequency domain evaluation result of the target point in the multiple test scenarios, including: calculating the corresponding magnetic induction intensity value based on the actual magnetic induction intensity and the voltage value obtained by the magnetic field radiation test; calculating the comprehensive energy value of the full frequency band by using the magnetic induction intensity value, and combining the comprehensive energy value of the full frequency band and the preset electromagnetic induction intensity limit value to perform frequency domain evaluation on the test vehicle.

[0046] Specifically, the embodiment of the present application can compare the actual magnetic induction intensity with the electromagnetic induction intensity limit value to obtain the percentage of each frequency point, and perform summation calculation according to the following formula to obtain the comprehensive percentage of the entire frequency band.

[0047] The calculation expression of the comprehensive energy value of the full frequency band is: , wherein, the comprehensive energy value of the full frequency band is represented by Wn, the magnetic induction intensity value of the jth frequency on the measurement frequency spectrum is represented by Hj, the preset electromagnetic induction intensity limit value of the jth frequency is represented by Hlimj.

[0048] In combination with Figure 5 and Figure 6 , the working principle of the frequency domain evaluation method of the vehicle of the embodiment of the present application is described in detail.

[0049] The embodiment of the present application can include the following steps: Step S1, as shown in Figure 5As shown, since the fundamental amplitude of the signal is usually the highest and accompanied by multiple harmonics, the peak frequency point is first considered for screening, and the value is higher than the value of the previous frequency point and at the same time higher than the value of the next frequency point. However, it is considered that simple screening cannot exclude the influence of false peaks generated by noise; therefore, the influence of environmental and equipment noise also needs to be considered for secondary screening. The embodiment of the present application can screen useful signals, perform frequency point screening on the frequency domain test value, find all peak frequency points (i.e. the value of the frequency point is higher than the value of the previous frequency point, and at the same time higher than the value of the next frequency point), to filter out the influence of environmental noise.

[0050] Step S2, connect the test equipment in the test environment, and ensure that the test vehicle is in a power-off state to prevent electromagnetic interference, and the magnetic induction intensity value of each frequency point is obtained in this case, that is, the inherent frequency point is obtained. For example, Figure 6 As shown, the embodiment of the present application can eliminate the inherent frequency point in the test equipment, that is, test the noise floor of the test equipment in a darkroom and record the margin value of each frequency point noise floor.

[0051] Step S3, the embodiment of the present application can obtain the actual signal emission value which is higher than the noise floor value in step S2 from the effective frequency point value obtained in step S1, that is, the actual magnetic induction intensity.

[0052] Step S4, the embodiment of the present application can compare the actual signal emission value with the limit value, obtain the percentage of each frequency point, and perform summation calculation, thereby obtaining the comprehensive percentage of the entire frequency band, that is, the full-band comprehensive energy value.

[0053] Further, the test process and the magnetic field radiation level evaluation process of the embodiment of the present application can include the following steps: Step S1, set the state of charge of the test vehicle and the state of the on-board electrical equipment according to the test task; Step S2, first set the test vehicle to a Ready high-voltage state, test each seat position point with a magnetic field measuring device + spectrum analysis device, and record the frequency domain data, calculate the comprehensive percentage of each position based on the embodiment of the present application, and find the maximum percentage data of the test vehicle in the static state by comparison, and record it as P 静止 ; Step S3, the test vehicle is driven at a constant speed, each seat position point is tested with a measuring device, and the frequency domain data is recorded, the comprehensive percentage of each position is calculated based on the embodiment of the present application, and the maximum percentage data of the test vehicle in the uniform speed driving state is found by comparison, and is recorded as P 匀速 ; Step S4, the test vehicle is accelerated at a constant acceleration from 0, each seat position point is tested with a measuring device, and the frequency domain data is recorded, the comprehensive percentage of each position is calculated based on the embodiment of the present application, and the maximum percentage data of the test vehicle in the acceleration driving state is found by comparison, and is recorded as P 加速 ; Step S5, the test vehicle is decelerated at a constant deceleration, each seat position point is tested by a measuring device, and frequency domain data is recorded, each position comprehensive percentage is calculated based on the embodiment of the application, and the maximum percentage data of the test vehicle in the deceleration driving state is found by comparison, and is recorded as P 减速 ; Step S6, the test vehicle is conducted by a conductive charging, each seat position point and the charging interface are tested by a measuring device, and frequency domain data is recorded, each position comprehensive percentage is calculated based on the embodiment of the application, and the maximum percentage data of the test vehicle in the conductive charging state is found by comparison, and is recorded as P 充电 ; Step S7, the test vehicle is conducted by a conductive charging, each seat position point and the charging interface are tested by a measuring device, and frequency domain data is recorded, each position comprehensive percentage is calculated based on the embodiment of the application, and the maximum percentage data of the test vehicle in the conductive charging state is found by comparison, and is recorded as P 放电 ; Step S8, according to the weight of the test vehicle in different states, the overall radiation level of the test vehicle is calculated, as shown in the following formula:

[0054] Among them, .

[0055] Step S9, wherein the lower the percentage P, the lower the radiation level of the test vehicle, and the better the performance of the test vehicle.

[0056] According to the vehicle frequency domain evaluation method provided by the embodiment of the application, the test data of the obtained magnetic field radiation test can be first screened, and the magnetic induction intensity data for evaluation is extracted automatically through the peak value, so as to avoid the influence of a single frequency point on the overall evaluation, and then the test vehicle is evaluated according to the actual magnetic induction intensity and the comprehensive intensity, so as to realize automatic data processing and evaluation, improve the data processing speed, and help to reduce the overall radiation level, rather than only a certain frequency point. Thus, the technical problem that the worst case of a single frequency point affects the overall evaluation in the related art, resulting in an overly conservative evaluation result and an inability to truly reflect the overall electromagnetic emission characteristics of the device, is solved.

[0057] Secondly, the vehicle frequency domain evaluation device according to the embodiment of the application is described with reference to the accompanying drawings.

[0058] Figure 7 is a block schematic diagram of the vehicle frequency domain evaluation device according to the embodiment of the application.

[0059] As Figure 7 shown, the vehicle frequency domain evaluation device 10 includes a test module 100, a screening module 200, and an evaluation module 300.

[0060] Specifically, the test module 100 is configured to control the test vehicle to perform corresponding magnetic field radiation tests in test scenes meeting preset conditions, so as to collect test data of the target point of the test vehicle in various driving scenes.

[0061] The screening module 200 is configured to extract a peak value of the test data and screen actual magnetic induction intensity from the test data based on the peak value.

[0062] The evaluation module 300 is configured to obtain frequency domain evaluation results of the target point in various test scenes by combining the actual magnetic induction intensity and a preset electromagnetic induction intensity limit value, and obtain a comprehensive frequency domain evaluation result of the test vehicle based on the frequency domain evaluation results of the target point in various test scenes.

[0063] Optionally, in an embodiment of the present application, the screening module 200 includes a first screening unit and a determination unit.

[0064] The first screening unit is configured to screen target data from the test data based on a preset screening condition.

[0065] The determination unit is configured to determine a frequency point corresponding to the peak value in the target data, delete the frequency point from the target data, and obtain the actual magnetic induction intensity.

[0066] Optionally, in an embodiment of the present application, the screening module 200 includes an acquisition unit and a second screening unit.

[0067] The acquisition unit is configured to acquire an inherent frequency point of the test device.

[0068] The second screening unit is configured to screen magnetic induction intensity data with a frequency point value greater than the inherent frequency point from the target data as the actual magnetic induction intensity.

[0069] Optionally, in an embodiment of the present application, the evaluation module 300 includes a comparison unit and a calculation unit.

[0070] The comparison unit is configured to calculate a corresponding magnetic induction intensity value based on the actual magnetic induction intensity and a voltage value obtained by the magnetic field radiation test.

[0071] The calculation unit is configured to calculate a full-band comprehensive energy value by using the magnetic induction intensity value, and perform frequency domain evaluation on the test vehicle by combining the full-band comprehensive energy value and the preset electromagnetic induction intensity limit value.

[0072] Optionally, in an embodiment of the present application, the calculation expression of the full-band comprehensive energy value is as follows: , wherein, represents a full-band comprehensive energy value, represents a magnetic induction value of the jth frequency on the measured spectrum, represents a preset magnetic induction limit value of the jth frequency.

[0073] It should be noted that the above explanation of the vehicle frequency domain evaluation method embodiment is also applicable to the vehicle frequency domain evaluation device of the embodiment, which will not be repeated here.

[0074] The vehicle frequency domain evaluation device provided by the embodiment of the present application can first test the obtained magnetic field radiation test data, and filter the test data to extract the magnetic induction data for evaluation by the peak value, so as to avoid the influence of a single frequency point on the overall evaluation, and then evaluate the test vehicle according to the actual magnetic induction and the comprehensive intensity, so as to realize automatic data processing and evaluation, improve the data processing speed, and help to reduce the overall radiation level, rather than only the radiation value of a certain frequency point. Thus, the technical problem in the related art that the worst case of a single frequency point affects the overall evaluation, resulting in an overly conservative evaluation result and an inability to truly reflect the overall electromagnetic emission characteristics of the device is solved.

[0075] Figure 8 The electronic device provided by the embodiment of the present application is shown in the structural schematic diagram of the electronic device. The electronic device can include: The memory 801, the processor 802, and the computer program stored in the memory 801 and executable on the processor 802.

[0076] The processor 802 implements the vehicle frequency domain evaluation method provided in the above embodiments when executing the program.

[0077] Further, the electronic device further includes: The communication interface 803 is used for communication between the memory 801 and the processor 802.

[0078] The memory 801 is used to store the computer program executable on the processor 802.

[0079] The memory 801 can include a high-speed RAM memory, and can also include a non-volatile memory, such as at least one disk memory.

[0080] If the memory 801, the processor 802 and the communication interface 803 are implemented independently, the communication interface 803, the memory 801 and the processor 802 can be connected with each other through a bus and complete communication between each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, Figure 8 Only one thick line is used to represent the bus in the figure, but it does not mean that there is only one bus or only one type of bus.

[0081] Optionally, in a specific implementation, if the memory 801, the processor 802 and the communication interface 803 are integrated on a chip, the memory 801, the processor 802 and the communication interface 803 can complete communication between each other through an internal interface.

[0082] The processor 802 can be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present application.

[0083] The embodiment further provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the frequency domain evaluation method of the vehicle.

[0084] The embodiment of the present application further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the frequency domain evaluation method of the vehicle provided by the embodiment of the present application.

[0085] In the description of the application, reference to "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. In addition, the usage of "first", "second" and the like does not indicate any order but rather serves merely to name various components. Moreover, the usage of "top", "bottom", and the like is made for the purpose of illustration only and does not indicate any orientation. The terms "coupled" and "connected", along with their derivatives, can be used. It should be understood that these terms are not intended as synonyms for each other. Rather, particular features are described as being coupled or connected where the feature is in some way present, for example through shared use of one or more components, and can be communicatively, electrically, structurally, and / or mechanically connected, for example. Similarly, "coupled" or "connected" can be used to indicate that two or more members are either directly in contact or indirectly in contact through one or more intermediate members.

[0086] Furthermore, the terms "first", "second", and the like, merely denote different categories, and do not imply a relative importance or a specific order. Thus, features defined with "first", "second" and the like can include at least one of the features, either explicitly or implicitly. In the description of the application, the term "N" means at least two, for example two, three, etc., unless explicitly specified otherwise.

[0087] Any process or method descriptions or blocks in flow charts or otherwise described herein represent embodiments of modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps, and alternate implementations are possible. In some embodiments, the processes or methods described can be accomplished by the functional equivalent in hardware, firmware, software, and / or combinations thereof, including the foregoing and potentially including parallel processing of information as described in connection with at least one of the above-referenced drawings. It should be understood that the order of steps or order for executing the processes or methods described above are not required to achieve the desired results associated with the functionality described, and that one skilled in the art can provide alternative ordering and / or adapt other structures and protocols with essentially similar functionality.

[0088] The logic and / or steps represented in flow diagrams or otherwise described herein, for example, can be considered as a sequence of executable instructions, and can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer-readable medium can be a product of the manufacturing and / or processing. The computer-readable medium can include, but is not limited to, the following: an electronic connection (an electronic device with one or N wires), a portable computer diskette (a magnetic device), a RAM (random access memory), a ROM (read-only memory), an EPROM (erasable programmable ROM) or a Flash memory, an optical fiber, and a portable CD ROM. In addition, the computer-readable medium can even be paper or another suitable medium upon which the program can be printed, as the program can be electronically captured, via the optically scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and stored in the computer memory.

[0089] It should be understood that aspects of the application can be implemented in hardware, software, firmware or combinations thereof. In the above embodiments, the N steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As such, if implemented in hardware and in another embodiment, any of the following technologies, known in the art, or their combinations can be used: discrete logic circuitry having logic gates for implementing logic functions on data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), and the like.

[0090] Those of ordinary skill in the art can understand that all or part of the steps carried out by the above-mentioned embodiment methods can be completed by programs instructing relevant hardware, and the programs can be stored in a computer-readable storage medium. When the programs are executed, one or a combination of the steps of the method embodiments is included.

[0091] In addition, each function unit in each embodiment of the present application can be integrated in one processing module, or each unit can be physically present separately, or two or more units can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of a software function module. When the integrated module is realized in the form of a software function module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0092] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A frequency domain evaluation method of a vehicle, characterized by, The method comprises the following steps: In a test scene meeting a preset condition, a corresponding magnetic field radiation test is performed on a test vehicle to collect test data of a target point of the test vehicle in a plurality of driving scenes; A peak value of the test data is extracted, and actual magnetic induction intensity is screened from the test data based on the peak value; The actual magnetic induction intensity and a preset electromagnetic induction intensity limit value are combined to obtain a frequency domain evaluation result of the target point in the plurality of test scenes, and a comprehensive frequency domain evaluation result of the test vehicle is obtained based on the frequency domain evaluation result of the target point in the plurality of test scenes.

2. The frequency domain evaluation method of a vehicle according to claim 1, characterized by, The actual magnetic induction intensity is screened from the test data based on the peak value, comprising: Target data is screened from the test data based on a preset screening condition; A frequency point corresponding to the peak value is determined in the target data, and the frequency point is deleted from the target data to obtain the actual magnetic induction intensity.

3. The frequency domain evaluation method of a vehicle according to claim 2, characterized by, The actual magnetic induction intensity is screened from the test data based on the peak value, comprising: An inherent frequency point of a test device is obtained; Magnetic induction intensity data with a frequency point value greater than the inherent frequency point is screened from the target data as the actual magnetic induction intensity.

4. The frequency domain evaluation method of a vehicle according to claim 1, characterized by, The actual magnetic induction intensity and a preset electromagnetic induction intensity limit value are combined to obtain a frequency domain evaluation result of the target point in the plurality of test scenes, comprising: A corresponding magnetic induction intensity value is calculated based on the actual magnetic induction intensity and a voltage value obtained by the magnetic field radiation test; A full-band comprehensive energy value is calculated using the magnetic induction intensity value, and the test vehicle is evaluated in the frequency domain by combining the full-band comprehensive energy value and the preset electromagnetic induction intensity limit value.

5. The frequency domain evaluation method of a vehicle according to claim 4, characterized by, The calculation expression of the full-band comprehensive energy value is: ， wherein, represents a full-band comprehensive energy value, represents a magnetic induction intensity value of the jth frequency on the measured spectrum, represents a preset electromagnetic induction intensity limit value of the jth frequency.

6. A frequency domain evaluation device of a vehicle, characterized by comprising: Comprising: A test module is configured to control a test vehicle to perform a corresponding magnetic field radiation test in a test scene meeting a preset condition to collect test data of a target point of the test vehicle in a plurality of driving scenes; A screening module is configured to extract a peak value of the test data and screen actual magnetic induction intensity from the test data based on the peak value; An evaluation module is configured to combine the actual magnetic induction intensity and a preset electromagnetic induction intensity limit value to obtain a frequency domain evaluation result of the target point in the plurality of test scenes, and obtain a comprehensive frequency domain evaluation result of the test vehicle based on the frequency domain evaluation result of the target point in the plurality of test scenes.

7. The frequency domain evaluation device of a vehicle according to claim 6, characterized by The screening module comprises: A first screening unit is configured to screen target data from the test data based on a preset screening condition; A determination unit is configured to determine a frequency point corresponding to the peak value in the target data to delete the frequency point from the target data to obtain the actual magnetic induction intensity.

8. An electronic device, comprising: Comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the frequency domain evaluation method of the vehicle according to any one of claims 1-5.

9. A computer readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the frequency domain evaluation method of the vehicle according to any one of claims 1-5.

10. A computer program product comprising a computer program, characterized in that, The computer program, when executed, is for implementing a frequency domain evaluation method of a vehicle as claimed in any one of claims 1-5.

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