CN118191484A - Automobile electromagnetic interference immunity test method and equipment based on whole automobile electromagnetic reverberation room - Google Patents
Automobile electromagnetic interference immunity test method and equipment based on whole automobile electromagnetic reverberation room Download PDFInfo
- Publication number
- CN118191484A CN118191484A CN202410598667.XA CN202410598667A CN118191484A CN 118191484 A CN118191484 A CN 118191484A CN 202410598667 A CN202410598667 A CN 202410598667A CN 118191484 A CN118191484 A CN 118191484A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic
- automobile
- test
- whole
- reverberation chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000036039 immunity Effects 0.000 title claims abstract description 37
- 238000010998 test method Methods 0.000 title claims abstract description 17
- 238000012360 testing method Methods 0.000 claims abstract description 85
- 238000003756 stirring Methods 0.000 claims abstract description 70
- 238000006073 displacement reaction Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 239000000523 sample Substances 0.000 claims description 41
- 238000004590 computer program Methods 0.000 claims description 14
- 230000006870 function Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 description 4
- 230000005670 electromagnetic radiation Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000012827 research and development Methods 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses an automobile electromagnetic interference immunity test method and equipment based on an automobile electromagnetic reverberation room, and relates to the technical field of automobile electromagnetic compatibility tests. The method comprises the following steps: acquiring sampling data received by a receiving antenna during the rotation period of a stirring paddle of an electromagnetic reverberation chamber of the whole vehicle according to a rated rotation speed; calculating autocorrelation coefficients when the stirring paddles rotate to different displacement amounts based on the sampling data; determining the sampled independent sample intervals based on the autocorrelation coefficients; determining a test rotation angle of the maximum size paddle based on the independent sample intervals; verifying that the electromagnetic reverberation chamber of the whole vehicle meets the standard field uniformity requirement according to the test rotation angle of the maximum-size stirring paddle and calculating field intensity calibration data; and carrying out electromagnetic disturbance rejection test on the basis of the field intensity calibration data. The automobile electromagnetic interference immunity test method and equipment based on the whole automobile electromagnetic reverberation room can effectively shorten the time of automobile electromagnetic interference immunity test and improve the test efficiency.
Description
Technical Field
The invention relates to the technical field of automobile electromagnetic compatibility testing, in particular to an automobile electromagnetic disturbance rejection testing method and equipment based on an automobile electromagnetic reverberation room.
Background
The development of the intellectualization, networking and electric control of the automobile enables the chassis control system of the automobile to be controlled by the traditional hydraulic machinery to gradually steer. To achieve a perception of the environment, vehicles are often fitted with a large number of sensors, and the sensor locations are distributed around the vehicle. Electronic sensors, controllers, actuators, and wiring harnesses connecting them are extremely susceptible to interference from wireless electromagnetic radiation, which can affect safe driving of the vehicle. Therefore, the electromagnetic interference resistance of the vehicle needs to be fully tested and verified in the development stage of the vehicle, so that the vehicle is ensured not to fail and degrade after being interfered.
The whole-vehicle electromagnetic reverberation room is a brand new laboratory for verifying electromagnetic radiation immunity of vehicles. The resonance simulation vehicle of the electromagnetic reverberation indoor interference signal of the whole vehicle is subjected to interference signals from all directions and all polarization modes, so that the anti-interference performance of a large number of electronic and electric systems in the intelligent network-connected vehicle is fully tested. However, the traditional testing method for the electromagnetic reverberation chamber of the whole vehicle by step stirring and continuous stirring is long in time consumption, and cannot meet the requirement of shortening the development period of the vehicle.
Disclosure of Invention
The invention aims to provide an automobile electromagnetic immunity test method and equipment based on an automobile electromagnetic reverberation room, which can effectively shorten the time of automobile electromagnetic immunity test and improve the test efficiency.
In order to achieve the above object, the present invention provides the following solutions:
An automobile electromagnetic interference immunity test method based on an entire automobile electromagnetic reverberation room comprises the following steps:
acquiring sampling data received by a receiving antenna during the rotation period of a stirring paddle of an electromagnetic reverberation chamber of the whole vehicle according to a rated rotation speed; the sampling data are electromagnetic signal intensities when the stirring paddles rotate to different displacement amounts;
calculating autocorrelation coefficients when the stirring paddles rotate to different displacement amounts based on the sampling data;
Determining the sampled independent sample intervals based on the autocorrelation coefficients;
Determining a test rotation angle of the maximum size paddle based on the independent sample intervals;
verifying that the electromagnetic reverberation chamber of the whole vehicle meets the standard field uniformity requirement according to the test rotation angle of the maximum-size stirring paddle and calculating field intensity calibration data;
and carrying out electromagnetic disturbance rejection test on the basis of the field intensity calibration data.
Optionally, the acquiring the sampling data received by the receiving antenna during the rotation of the whole electromagnetic reverberation chamber stirring paddle according to the rated rotation speed specifically includes:
Setting a rated rotation speed according to the maximum rotation speed of a stirring paddle in an electromagnetic reverberation chamber of the whole vehicle;
controlling the stirring paddle of the electromagnetic reverberation chamber of the whole vehicle to rotate according to the rated rotating speed;
injecting an interference signal into the whole vehicle electromagnetic reverberation chamber in a sweep frequency mode through a transmitting antenna;
sampling data when the stirring paddles rotate to different displacement amounts are received through the receiving antenna.
Optionally, the calculating the autocorrelation coefficients when the stirring paddles rotate to different displacement amounts based on the sampling data specifically includes:
Based on the sampled data, passing through a formula Calculating autocorrelation coefficients/>, when the stirring paddles rotate to different displacement amounts l; Wherein N is the number of samples of the sampled data; /(I)A sampled data sequence for the ith sample; /(I)The average value of all samples of the sampled data; mod is a remainder function; l is the displacement of the rotation of the stirring paddle.
Optionally, the determining the sampling independent sample interval based on the autocorrelation coefficient specifically includes:
Based on autocorrelation coefficients Determining a displacement corresponding to an optimal autocorrelation coefficient smaller than a preset autocorrelation coefficient threshold as a sample interval/>；
Based on sample spacingDetermining independent sample interval/>, greater than or equal to the sample interval。
Optionally, the determining the test rotation angle of the maximum size stirring paddle based on the independent sample interval specifically includes:
Based on independent sample spacing And a preset independent number of samples/>By the formula/>Calculating to obtain the minimum sequence length/>；
According to minimum sequence lengthBy the formula/>Determining test rotation angle/>, of maximum size stirring paddle。
Optionally, the test rotation angle of the maximum-size stirring paddle verifies that the electromagnetic reverberation chamber of the whole vehicle meets the standard field uniformity requirement and calculates field intensity calibration data, and specifically comprises the following steps:
arranging a plurality of field intensity probes in an electromagnetic reverberation chamber of the whole vehicle;
rotating the stirring paddle according to the rated rotation speed, and simultaneously injecting an interference signal into the electromagnetic reverberation chamber of the whole vehicle by using the transmitting antenna and keeping the preset time; the preset time is the maximum size stirring paddle rotation test rotation angle The time required;
The receiving antenna collects field intensity data measured by a plurality of field intensity probes at each frequency point;
after confirming that the whole electromagnetic reverberation chamber meets the ISO 11451-5 standard field uniformity requirement based on field intensity data, placing the tested automobile in the whole electromagnetic reverberation chamber;
rotating the stirring paddle according to the rated rotation speed, and simultaneously injecting an interference signal into the electromagnetic reverberation chamber of the whole vehicle by using the transmitting antenna and keeping the preset time;
recording field intensity data measured by a plurality of field intensity probes acquired by a receiving antenna at each frequency point and the power of the interference signals injected into each frequency point;
And calculating field intensity calibration data based on the power of the injected interference signals of each frequency point and the field intensity data measured by each frequency point.
Optionally, the electromagnetic disturbance rejection test for the automobile based on the field intensity calibration data specifically comprises:
Determining the test power of an interference signal to be injected during the test according to the field intensity calibration data;
Setting the tested automobile to a working state required by testing, rotating the stirring paddle according to a rated rotating speed, simultaneously injecting an interference signal consistent with the testing power into the electromagnetic reverberation room of the whole automobile by using the transmitting antenna, and maintaining the preset time to test the electromagnetic anti-interference performance of the tested automobile.
A computer device, comprising: the system comprises a memory, a processor and a computer program which is stored in the memory and can be run on the processor, wherein the processor executes the computer program to realize the automobile electromagnetic immunity testing method based on the whole automobile electromagnetic reverberation room.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
The invention provides an automobile electromagnetic anti-interference test method and equipment based on an automobile electromagnetic reverberation room, which are used for obtaining optimal test parameters during an automobile electromagnetic anti-interference test by calculating a test rotation angle of a maximum-size stirring paddle, confirming standard field uniformity and calculating field intensity calibration data, and effectively shortening the time of the automobile electromagnetic anti-interference test and improving test efficiency by carrying out the automobile electromagnetic anti-interference test according to the optimal test parameters.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of an automobile electromagnetic immunity test method based on an entire automobile electromagnetic reverberation chamber;
Fig. 2 is a schematic diagram of an execution process of an electromagnetic immunity test method of an automobile based on an electromagnetic reverberation chamber of the whole automobile;
fig. 3 is a schematic structural diagram of an electromagnetic immunity test device for an automobile.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide an automobile electromagnetic immunity test method and equipment based on an automobile electromagnetic reverberation room, which can effectively shorten the time of automobile electromagnetic immunity test and improve the test efficiency.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 and fig. 2, the method for testing electromagnetic immunity of an automobile based on an electromagnetic reverberation chamber of the whole automobile disclosed by the invention comprises the following steps:
Step 1: and acquiring sampling data received by a receiving antenna during the rotation period of the stirring paddle of the electromagnetic reverberation chamber of the whole vehicle according to the rated rotation speed.
As shown in fig. 3, the electromagnetic immunity test equipment for the automobile provided by the invention mainly comprises an electromagnetic reverberation room of the whole automobile, an electromagnetic radiation immunity test system, a receiving antenna, a field intensity probe and a control computer. The whole electromagnetic reverberation room is a test site implemented by an integral scheme, and all steps are executed in the whole electromagnetic reverberation room. When the field intensity is calibrated, the receiving antenna and the field intensity probe are arranged at the required positions according to the requirements, the electromagnetic radiation immunity test system is controlled to inject interference signals into the reverberation room by using test software running on a computer, and the control instrument reads data of the receiving antenna and the field intensity probe. And then, running test software on the computer to develop a rapid stirring test.
And setting a reasonable rated rotation speed of the stirring paddles according to the maximum rotation speed of each stirring paddle in the whole vehicle electromagnetic reverberation chamber, wherein the test time is shorter as the rated rotation speed is faster. The rated rotational speed is a rotational speed at which long-time operation is maintained, and is less than the maximum rotational speed. The rated rotation speed is determined by the motion mechanical structure of the stirring paddle. The rated rotation speed set at this time is kept unchanged in the following standard field uniformity verification step, field intensity calibration data acquisition step and rapid stirring test process.
Specifically, a receiving antenna is placed at any selected point in a cubic working space designed for the whole car electromagnetic reverberation chamber, and the electromagnetic signal intensity received by the point is measured by using a spectrometer. And then rotating all stirring paddles in the electromagnetic reverberation chamber of the whole vehicle according to a set rated speed, and injecting interference signals into the electromagnetic reverberation chamber of the whole vehicle in a frequency sweep mode through a transmitting antenna arranged in the reverberation chamber, wherein the holding time of each frequency point is the time required by one rotation of the maximum-size stirring paddles of the electromagnetic reverberation chamber of the whole vehicle. And when the interference signals are injected, acquiring electromagnetic signal intensity data when the stirring paddles rotate to different displacement amounts by using the receiving antenna as sampling data.
Step 2: and calculating autocorrelation coefficients when the stirring paddles rotate to different displacement amounts based on the sampling data.
Taking out a frequency point, acquiring electromagnetic signal intensity data acquired by a receiving antenna when the stirring paddles rotate to different displacement amounts during the rotation period of the stirring paddles at the frequency point, and calculating autocorrelation coefficients when the stirring paddles rotate to different displacement amounts l by using a formula (1)：
（1）
Wherein N is the number of samples of the sampled data; a sampled data sequence for the ith sample; /(I) The average value of all samples of the sampled data; mod is a remainder function; l is the displacement of the rotation of the stirring paddle.
Step 3: the sampled independent sample intervals are determined based on the autocorrelation coefficients.
Calculating autocorrelation coefficients when the stirring paddles rotate to different displacement amountsThen, the uncorrelated angle is determined by presetting an autocorrelation coefficient threshold. The irrelevant angle means that after the stirring paddle moves beyond the irrelevant angle, the electromagnetic field distribution in the electromagnetic reverberation chamber of the whole vehicle is obviously changed, and the situation is considered to be irrelevant. Based on autocorrelation coefficient/>Determining a displacement corresponding to an optimal autocorrelation coefficient smaller than a preset autocorrelation coefficient threshold as a sample interval/>Optimal autocorrelation coefficient/>, which is less than a preset autocorrelation coefficient thresholdExpressed as:
（2）
Based on sample spacing Determining a sample interval/or greater than or equal toIndependent sample interval/>。
Step 4: the test rotation angle of the maximum size paddle is determined based on the independent sample spacing.
Based on independent sample spacingCalculating to obtain the minimum sequence length/>, by using the formula (3)：
（3）
Wherein,Is a preset number of independent samples, and is given by a test plan.
According to minimum sequence lengthDetermining the test rotation angle/>, of the maximum-size stirring paddle through a formula (4)I.e., the range of motion of the paddles in fig. 2, thereby ensuring that the number of independent samples can still be met for less than one cycle of paddle motion.
（4）
Step 5: and verifying that the electromagnetic reverberation chamber of the whole vehicle meets the standard field uniformity requirement according to the test rotation angle of the maximum-size stirring paddle and calculating field intensity calibration data.
Specifically, a field intensity probe is respectively arranged at 8 vertexes of a cubic working space designed in the whole-vehicle electromagnetic reverberation chamber, the stirring paddles are rotated according to the rated rotation speed set in the step 1, meanwhile, an interference signal is injected into the whole-vehicle electromagnetic reverberation chamber by using a transmitting antenna, and each frequency point keeps a preset time as a rotation test rotation angle of the maximum-size stirring paddles in the whole-vehicle electromagnetic reverberation chamberThe time required. The receiving antenna collects field intensity data measured by 8 field intensity probes at each frequency point, and the field intensity data is read through the controller. And calculating the field uniformity of the whole electromagnetic reverberation chamber according to a method specified by the ISO 11451-5 standard, and confirming that the whole electromagnetic reverberation chamber meets the ISO 11451-5 standard field uniformity requirement.
And then arranging the tested automobile into the whole automobile electromagnetic reverberation chamber, rotating the stirring paddle according to the rated rotation speed, and simultaneously injecting an interference signal into the whole automobile electromagnetic reverberation chamber by using the transmitting antenna and keeping the preset time. Recording the power of the injected interference signal of each frequency point and the field intensity data measured by a plurality of field intensity probes at each frequency point, which are acquired by a receiving antenna, and calculating the field intensity calibration data by using an ISO 11451-5 standard method.
Step 6: and carrying out electromagnetic disturbance rejection test on the basis of the field intensity calibration data.
And (3) determining the test power of the interference signal to be injected during the test by using the field intensity calibration data and the test grade obtained by the step (5), then arranging the tested automobile into the whole automobile electromagnetic reverberation room, and arranging required automobile state monitoring equipment such as a camera, a CAN bus transceiver, a field intensity probe and the like. Setting the tested automobile to a working state required by testing, rotating the stirring paddle according to a rated rotating speed, simultaneously injecting an interference signal consistent with the testing power into the electromagnetic reverberation room of the whole automobile by using the transmitting antenna, and maintaining the preset time to test the electromagnetic anti-interference performance of the tested automobile.
In summary, according to the automobile electromagnetic immunity test method based on the whole automobile electromagnetic reverberation chamber, on one hand, the test time is reduced by rapidly stirring the whole automobile electromagnetic immunity test method, so that the research and development period can be shortened, the research and development cost is saved, and the development period of the whole automobile is reduced. The problem that a single frequency point needs to move for one period by a stirring paddle in the existing step stirring and continuous stirring method of the whole automobile electromagnetic reverberation chamber is solved, so that the test time is long. By improving the rotation speed of the stirring paddles, the movement range of the single frequency point stirring paddles is reduced, and the test time is shortened. Therefore, the invention can greatly reduce the time of the electromagnetic immunity test of the automobile based on the whole automobile electromagnetic reverberation room method, thereby improving the electromagnetic immunity test efficiency of the automobile, realizing the purpose of reducing the test time and shortening the research and development period of the electromagnetic compatibility of the automobile while fully verifying the electromagnetic immunity performance of the automobile by using the whole automobile electromagnetic reverberation room method. Meanwhile, the test environment in the electromagnetic reverberation room test method is more similar to the road electromagnetic environment, so that the electromagnetic disturbance rejection test can be more objective. In addition, the automobile electromagnetic immunity test method based on the whole automobile electromagnetic reverberation chamber can be applied to the whole automobile electromagnetic reverberation chamber to perform immunity test on other samples.
In addition, the invention also provides a computer program product, which comprises a computer program, wherein the computer program is executed by a processor to realize the automobile electromagnetic immunity test method based on the whole automobile electromagnetic reverberation room.
Further, the invention also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, realizes the method for testing the electromagnetic immunity of the automobile based on the whole automobile electromagnetic reverberation room.
Furthermore, the invention also provides a computer device, which comprises a processor, a memory, an Input/Output interface (I/O for short), a communication interface and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the computer program to realize the electromagnetic immunity test method of the automobile based on the whole automobile electromagnetic reverberation chamber.
The processor, the memory and the input/output interface are connected through a system bus, and the communication interface is connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer device is used to store the pending transactions. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by the processor to realize the automobile electromagnetic immunity testing method based on the whole automobile electromagnetic reverberation room.
It should be noted that, the object information (including, but not limited to, object device information, object personal information, etc.) and the data (including, but not limited to, data for analysis, stored data, presented data, etc.) related to the present invention are both information and data authorized by the object or sufficiently authorized by each party, and the collection, use and processing of the related data need to comply with the related laws and regulations and standards of the related countries and regions.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magneto-resistive random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (PHASE CHANGE Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as Static Random access memory (Static Random access memory AccessMemory, SRAM) or dynamic Random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present invention may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. An automobile electromagnetic disturbance rejection test method based on an automobile electromagnetic reverberation room is characterized by comprising the following steps of:
acquiring sampling data received by a receiving antenna during the rotation period of a stirring paddle of an electromagnetic reverberation chamber of the whole vehicle according to a rated rotation speed; the sampling data are electromagnetic signal intensities when the stirring paddles rotate to different displacement amounts;
calculating autocorrelation coefficients when the stirring paddles rotate to different displacement amounts based on the sampling data;
Determining the sampled independent sample intervals based on the autocorrelation coefficients;
Determining a test rotation angle of the maximum size paddle based on the independent sample intervals;
verifying that the electromagnetic reverberation chamber of the whole vehicle meets the standard field uniformity requirement according to the test rotation angle of the maximum-size stirring paddle and calculating field intensity calibration data;
and carrying out electromagnetic disturbance rejection test on the basis of the field intensity calibration data.
2. The method for testing the electromagnetic immunity of the automobile based on the whole automobile electromagnetic reverberation chamber according to claim 1, wherein the step of acquiring the sampling data received by the receiving antenna during the rotation of the stirring paddle of the whole automobile electromagnetic reverberation chamber according to the rated rotation speed comprises the following steps:
Setting a rated rotation speed according to the maximum rotation speed of a stirring paddle in an electromagnetic reverberation chamber of the whole vehicle;
controlling the stirring paddle of the electromagnetic reverberation chamber of the whole vehicle to rotate according to the rated rotating speed;
injecting an interference signal into the whole vehicle electromagnetic reverberation chamber in a sweep frequency mode through a transmitting antenna;
sampling data when the stirring paddles rotate to different displacement amounts are received through the receiving antenna.
3. The method for testing the electromagnetic immunity of the automobile based on the whole automobile electromagnetic reverberation chamber according to claim 2, wherein the calculating the autocorrelation coefficients when the stirring paddles rotate to different displacement amounts based on the sampling data specifically comprises:
Based on the sampled data, passing through a formula Calculating autocorrelation coefficients/>, when the stirring paddles rotate to different displacement amounts l; Wherein N is the number of samples of the sampled data; /(I)A sampled data sequence for the ith sample; /(I)The average value of all samples of the sampled data; mod is a remainder function; l is the displacement of the rotation of the stirring paddle.
4. The method for testing electromagnetic immunity of a vehicle based on a whole vehicle electromagnetic reverberation chamber according to claim 3, wherein the determining the sampling independent sample interval based on the autocorrelation coefficient specifically comprises:
Determining a displacement corresponding to an optimal autocorrelation coefficient smaller than a preset autocorrelation coefficient threshold as a sample interval based on the autocorrelation coefficient ；
Determining an independent sample interval greater than or equal to the sample interval based on the sample interval。
5. The method for testing the electromagnetic immunity of the automobile based on the whole automobile electromagnetic reverberation chamber according to claim 4, wherein the determining the test rotation angle of the maximum-size stirring paddle based on the independent sample interval comprises the following steps:
Based on independent sample spacing And a preset independent number of samples/>By the formula/>Calculating to obtain the minimum sequence length/>；
According to minimum sequence lengthBy the formula/>Determining a test rotation angle of a maximum size stirring paddle。
6. The method for testing the electromagnetic immunity of the automobile based on the whole automobile electromagnetic reverberation chamber according to claim 5, wherein the test rotation angle of the maximum-size stirring paddle verifies that the whole automobile electromagnetic reverberation chamber meets the standard field uniformity requirement and calculates field strength calibration data, and specifically comprises the following steps:
arranging a plurality of field intensity probes in an electromagnetic reverberation chamber of the whole vehicle;
rotating the stirring paddle according to the rated rotation speed, and simultaneously injecting an interference signal into the electromagnetic reverberation chamber of the whole vehicle by using the transmitting antenna and keeping the preset time; the preset time is the maximum size stirring paddle rotation test rotation angle The time required;
The receiving antenna collects field intensity data measured by a plurality of field intensity probes at each frequency point;
after confirming that the whole electromagnetic reverberation chamber meets the ISO 11451-5 standard field uniformity requirement based on field intensity data, placing the tested automobile in the whole electromagnetic reverberation chamber;
rotating the stirring paddle according to the rated rotation speed, and simultaneously injecting an interference signal into the electromagnetic reverberation chamber of the whole vehicle by using the transmitting antenna and keeping the preset time;
recording field intensity data measured by a plurality of field intensity probes acquired by a receiving antenna at each frequency point and the power of the interference signals injected into each frequency point;
And calculating field intensity calibration data based on the power of the injected interference signals of each frequency point and the field intensity data measured by each frequency point.
7. The method for testing the electromagnetic immunity of the automobile based on the whole automobile electromagnetic reverberation room of claim 6, which is characterized by specifically comprising the following steps of:
Determining the test power of an interference signal to be injected during the test according to the field intensity calibration data;
Setting the tested automobile to a working state required by testing, rotating the stirring paddle according to a rated rotating speed, simultaneously injecting an interference signal consistent with the testing power into the electromagnetic reverberation room of the whole automobile by using the transmitting antenna, and maintaining the preset time to test the electromagnetic anti-interference performance of the tested automobile.
8. A computer device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the method for electromagnetic immunity testing of a vehicle based on a whole vehicle electromagnetic reverberation chamber according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410598667.XA CN118191484B (en) | 2024-05-15 | 2024-05-15 | Automobile electromagnetic interference immunity test method and equipment based on whole automobile electromagnetic reverberation room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410598667.XA CN118191484B (en) | 2024-05-15 | 2024-05-15 | Automobile electromagnetic interference immunity test method and equipment based on whole automobile electromagnetic reverberation room |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118191484A true CN118191484A (en) | 2024-06-14 |
| CN118191484B CN118191484B (en) | 2024-07-23 |
Family
ID=91406604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410598667.XA Active CN118191484B (en) | 2024-05-15 | 2024-05-15 | Automobile electromagnetic interference immunity test method and equipment based on whole automobile electromagnetic reverberation room |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118191484B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101417919B1 (en) * | 2014-03-05 | 2014-07-10 | 국방과학연구소 | Stirrer system in reverberation chamber |
| CN104407248A (en) * | 2014-11-27 | 2015-03-11 | 中国人民解放军军械工程学院 | Reverberation room platform based method for testing electromagnetic environment effects of electronic system |
| CN106294998A (en) * | 2016-08-09 | 2017-01-04 | 中国计量科学研究院 | A kind of dimensionally-optimised method and device of electromagnetic reverberation room cavity |
| KR20190022960A (en) * | 2017-08-23 | 2019-03-07 | 한국전자통신연구원 | Method and system for measuring radiated emission based reverberation chamber |
| CN109541512A (en) * | 2018-12-20 | 2019-03-29 | 北京无线电计量测试研究所 | A kind of blender and reverberation chamber device for reverberation chamber device |
| CN112485538A (en) * | 2020-11-03 | 2021-03-12 | 飞特质科(北京)计量检测技术有限公司 | System for improving calibration precision of radio frequency radiation sensitivity of reverberation room |
| CN115508626A (en) * | 2022-10-25 | 2022-12-23 | 西安交通大学 | Amplitude-only measurement antenna directional pattern reconstruction method and system in reverberation room |
| US20230168286A1 (en) * | 2021-11-29 | 2023-06-01 | Tdk Corporation | Reverberation chamber and antenna device |
| KR20230134293A (en) * | 2022-03-14 | 2023-09-21 | 한국전자통신연구원 | Method and system for measuring radio channel characteristics using electromagnetic reverberation chamber |
| CN117590090A (en) * | 2024-01-18 | 2024-02-23 | 中国计量科学研究院 | Device, method and equipment for quickly confirming uniformity of electromagnetic reverberation room field |
-
2024
- 2024-05-15 CN CN202410598667.XA patent/CN118191484B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101417919B1 (en) * | 2014-03-05 | 2014-07-10 | 국방과학연구소 | Stirrer system in reverberation chamber |
| CN104407248A (en) * | 2014-11-27 | 2015-03-11 | 中国人民解放军军械工程学院 | Reverberation room platform based method for testing electromagnetic environment effects of electronic system |
| CN106294998A (en) * | 2016-08-09 | 2017-01-04 | 中国计量科学研究院 | A kind of dimensionally-optimised method and device of electromagnetic reverberation room cavity |
| KR20190022960A (en) * | 2017-08-23 | 2019-03-07 | 한국전자통신연구원 | Method and system for measuring radiated emission based reverberation chamber |
| CN109541512A (en) * | 2018-12-20 | 2019-03-29 | 北京无线电计量测试研究所 | A kind of blender and reverberation chamber device for reverberation chamber device |
| CN112485538A (en) * | 2020-11-03 | 2021-03-12 | 飞特质科(北京)计量检测技术有限公司 | System for improving calibration precision of radio frequency radiation sensitivity of reverberation room |
| US20230168286A1 (en) * | 2021-11-29 | 2023-06-01 | Tdk Corporation | Reverberation chamber and antenna device |
| KR20230134293A (en) * | 2022-03-14 | 2023-09-21 | 한국전자통신연구원 | Method and system for measuring radio channel characteristics using electromagnetic reverberation chamber |
| CN115508626A (en) * | 2022-10-25 | 2022-12-23 | 西安交通大学 | Amplitude-only measurement antenna directional pattern reconstruction method and system in reverberation room |
| CN117590090A (en) * | 2024-01-18 | 2024-02-23 | 中国计量科学研究院 | Device, method and equipment for quickly confirming uniformity of electromagnetic reverberation room field |
Non-Patent Citations (2)
| Title |
|---|
| 胡德洲;魏光辉;潘晓东;纪凯夫;: "混响室与均匀场临界辐射干扰场强等效测试方法", 北京理工大学学报, no. 09, 15 September 2018 (2018-09-15) * |
| 马明宇;郭建东;姜成龙;孙凯燚;国晨;陈磊;: "新能源汽车动力电池及其管理***的EMC测试与整改案例", 中国汽车, no. 07, 22 July 2020 (2020-07-22) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118191484B (en) | 2024-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113484851B (en) | Simulation test system and method for vehicle-mounted laser radar and complete vehicle in-loop test system | |
| JP3545535B2 (en) | Semiconductor memory test method and apparatus | |
| CN118191484B (en) | Automobile electromagnetic interference immunity test method and equipment based on whole automobile electromagnetic reverberation room | |
| CN115146431B (en) | Vehicle-mounted antenna simulation method and device | |
| CN1867835A (en) | System and method for magnetic resonance imaging | |
| CN110068771B (en) | High-precision battery model parameter identification method and system based on output response reconstruction | |
| CN105678021B (en) | The parameter determination method and system of auto model | |
| CN113189529A (en) | Calibration method and device for current sensor | |
| CN117607555A (en) | Electromagnetic parameter testing method, system and storage medium for microwave antenna | |
| CN112329920B (en) | Unsupervised training method and unsupervised training device for magnetic resonance parameter imaging model | |
| CN111856307B (en) | Method and device for estimating battery SoH, storage medium and intelligent device | |
| CN105259795A (en) | Internal impedance parameter expansion method for power battery simulator | |
| Lauer et al. | XPU technology for fast and efficient FDTD Simulations using modern CPUs Cache Memory Bandwidth | |
| CN115981284A (en) | Vehicle simulation test method, apparatus, computer device, medium, and program product | |
| CN106154049B (en) | Method and system for testing dielectric property of thin film material | |
| CN114992258A (en) | Method, device and equipment for calibrating position of half-joint point of clutch and storage medium | |
| CN113654888A (en) | Method for rapidly predicting permanent deformation of carbonaceous mudstone | |
| CN116434821B (en) | System and method for testing LPDDR4 particles | |
| CN118191485B (en) | Method, system, medium and product for verifying signal transmission characteristics of electromagnetic environment of reverberation room | |
| CN116400219A (en) | Motor back electromotive force measuring method, equipment, device and computer equipment | |
| CN114993883B (en) | Method for describing magnetic resonance imaging signal expansion exponential decay and application thereof | |
| CN114003453B (en) | Test method, electronic equipment, system and computer storage medium | |
| CN118013217B (en) | Internet of things communication data missing processing method and system | |
| CN115142964B (en) | Engine control method, engine control device, vehicle and storage medium | |
| CN115421205A (en) | Method and device for determining T2 spectrum bound water cut-off value of igneous rock nuclear magnetic resonance logging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |