CN114217141B - Vehicle electromagnetic compatibility testing method, system, storage medium and testing equipment - Google Patents
Vehicle electromagnetic compatibility testing method, system, storage medium and testing equipment Download PDFInfo
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Abstract
The invention provides a vehicle electromagnetic compatibility testing method, a system, a storage medium and testing equipment, which are applied to an ECM testing system, wherein the method comprises the following steps: after the whole vehicle is electrified, acquiring target vehicle information, placing a field generating device on a theoretical position according to the target vehicle information, and acquiring field intensity values of a plurality of preset points in a test area; screening out a maximum field intensity value and a minimum field intensity value from field intensity values corresponding to a plurality of preset points, and judging whether the difference value of the maximum field intensity value and the minimum field intensity value is smaller than a preset field intensity threshold value or not; if not, the output power of the field generating device is finely adjusted according to a preset calibration rule, so that the difference value between the finely adjusted maximum field intensity value and the finely adjusted minimum field intensity value is within a preset field intensity threshold value, and an ECM test is started. The vehicle electromagnetic compatibility testing method provided by the invention can provide a uniform electromagnetic field for the automobile to test, does not need to frequently adjust the position of the field generating device, and has lower testing cost.
Description
Technical Field
The present invention relates to the field of electromagnetic compatibility testing technologies, and in particular, to a vehicle electromagnetic compatibility testing method, system, storage medium, and testing device.
Background
The electromagnetic compatibility test of automobiles is performed to examine the sensitivity of the tested electrical and electronic products or systems (collectively referred to as test pieces) to external electromagnetic fields. In the test, the transmitting antenna for electromagnetic compatibility test needs to generate a uniform electromagnetic field in the tested area, and the whole vehicle needs to be in the range of the main lobe of the antenna.
According to the relevant test standard, the field generating device (transmitting antenna) used for electromagnetic compatibility test needs to be arranged 2 meters in front of the vehicle. Although this method has been listed as an international and domestic standard test method, it is often not guaranteed that the vehicle is in a uniform electromagnetic field due to the limitations of the actual vehicle size.
In the prior art, in order to ensure that all the vehicles are covered by the lobes of the transmitting antenna, a plurality of arrangement positions are generally selected in sequence to repeat the test, but the transmitting antenna needs to be frequently moved in the test mode, and the test needs to be repeated, so that the test time is longer and the test cost is higher.
Disclosure of Invention
Based on the above, the invention aims to provide a vehicle electromagnetic compatibility testing method, a system, a storage medium and testing equipment, so as to solve the problems of long testing time and high testing cost caused by repeated testing in the traditional mode.
According to the vehicle electromagnetic compatibility testing method provided by the invention, the method is applied to an ECM testing system, the ECM testing system is respectively in communication connection with a target vehicle and a field generating device, and the method comprises the following steps:
After the whole vehicle is electrified, acquiring target vehicle information, placing the field generating device on a theoretical position according to the target vehicle information, and acquiring field intensity values of a plurality of preset points in a test area, wherein the test area is used for placing a target vehicle;
screening out a maximum field intensity value and a minimum field intensity value from field intensity values corresponding to a plurality of preset points, and judging whether the difference value between the maximum field intensity value and the minimum field intensity value is smaller than a preset field intensity threshold value or not;
If not, the output power of the field generating device is finely adjusted according to a preset calibration rule, so that the difference value between the finely adjusted maximum field intensity value and the minimum field intensity value is within the preset field intensity threshold value, and an ECM test is started.
In summary, according to the above-mentioned vehicle electromagnetic compatibility testing method, first, obtain the target vehicle information, and set up the field generator on the theoretical position according to the target vehicle information, then obtain the field intensity value of a plurality of preset points in the test area, and screen out the maximum field intensity value and minimum field intensity value from this, judge whether the electromagnetic field in the test area is even according to the difference of maximum field intensity value and minimum field intensity value, if judge that the difference of maximum field intensity value and minimum field intensity value is greater than the preset field intensity threshold value, fine-tune the output power of the field generator according to the calibration rule of presetting, so as to make the difference within the preset field intensity threshold value, namely within the error, thus realize the required uniform electromagnetic field of electromagnetic compatibility fast, need not to choose a plurality of positions to carry on the repeated test successively, greatly raise the test efficiency, and reduce the test cost.
Further, the step of acquiring the target vehicle information and placing the field generating device at a theoretical position according to the target vehicle information includes:
Acquiring size information and vehicle type information of a target vehicle, and setting a test area according to the size information of the target vehicle;
and according to the vehicle type information, a corresponding preset test field intensity range when the target vehicle is subjected to ECM test is adjusted and taken out from a preset database, so that the output power of the field generating device is estimated according to the preset test field intensity range, and the shortest distance between the field generating device and the test area is calculated according to the size of the test area.
Further, the step of adjusting the corresponding preset test field intensity range when the target vehicle performs ECM test according to the vehicle type information from the preset database to estimate the output power of the field generating device according to the preset test field intensity range, and calculating the shortest distance between the field generating device and the test area according to the size of the test area further includes:
Adjusting and fixing the position of the field generating device according to the shortest distance between the field generating device and the test area and a preset height value;
And establishing a corresponding plane contour model according to the test area, wherein the height of the plane contour model is the same as that of the field generating device, and a preset number of test points are selected from the contour model at equal intervals, and field intensity values of all the test points are sequentially obtained.
Further, before the step of screening out the maximum field intensity value and the minimum field intensity value from the field intensity values corresponding to the preset points and judging whether the difference between the maximum field intensity value and the minimum field intensity value is smaller than the preset field intensity threshold value, the method further comprises the steps of:
sequentially arranging field intensity values corresponding to all the test points according to ascending order, and judging whether the field intensity values corresponding to all the test points are in a preset test field intensity range or not;
if not, generating fault reminding information and sending the fault reminding information to an administrator of the electromagnetic compatibility test of the vehicle.
Further, if not, the output power of the field generating device is finely adjusted according to a preset calibration rule, so that the difference value between the finely adjusted maximum field intensity value and the minimum field intensity value is within the preset field intensity threshold, and the step of starting the ECM test includes:
The output frequency of the field generating device is increased once according to a preset proportion, and the field intensity value of each preset point is detected in real time to screen out the maximum field intensity value, and the maximum field intensity value is recorded as the maximum field intensity value of the period;
Acquiring a test field intensity upper limit value according to the preset test field intensity range, and judging whether the maximum field intensity value of the period is larger than the test field intensity upper limit value;
If not, the output frequency of the field generating device in the period is increased again according to the preset proportion.
Further, after the step of obtaining the upper limit value of the test field intensity according to the preset test field intensity range and judging whether the maximum field intensity value of the period is greater than the upper limit value of the test field intensity, the method further includes:
If the maximum field intensity value of the period is larger than the upper limit value of the test field intensity, taking the output power of the field generating device in the previous period as the final test power of the ECM test, and judging whether the difference value between the maximum field intensity value and the minimum field intensity value in the final test power is smaller than a preset field intensity threshold value or not;
If yes, the ECM test is started.
Further, the method further comprises:
If the difference value between the maximum field intensity value and the minimum field intensity value under the final test power is larger than the preset field intensity threshold value, field intensity early warning information is generated to prompt that the preset test field intensity range currently set by the administrator of the electromagnetic compatibility test of the vehicle is wrong.
According to an embodiment of the invention, a vehicle electromagnetic compatibility test system is applied to an ECM test system, the ECM test system is respectively in communication connection with a target vehicle and a field generating device, and the system comprises:
The field intensity monitoring module is used for acquiring target vehicle information after the whole vehicle is electrified, placing the field generating device on a theoretical position according to the target vehicle information, and acquiring field intensity values of a plurality of preset points in the test area;
The field intensity analysis module is used for screening out a maximum field intensity value and a minimum field intensity value from field intensity values corresponding to a plurality of preset points and judging whether the difference value between the maximum field intensity value and the minimum field intensity value is smaller than a preset field intensity threshold value or not;
And the field intensity calibration module is used for carrying out fine adjustment on the output power of the field generating device according to a preset calibration rule if not, so that the difference value between the maximum field intensity value and the minimum field intensity value after fine adjustment is within the preset field intensity threshold value, and starting an ECM test.
Another aspect of the present invention also provides a storage medium including the storage medium storing one or more programs that when executed implement the vehicle electromagnetic compatibility testing method as described above.
In another aspect, the present invention also provides a test apparatus comprising a memory and a processor, wherein:
the memory is used for storing a computer program;
the processor is used for realizing the vehicle electromagnetic compatibility testing method when executing the computer program stored in the memory.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a flow chart of a method for testing electromagnetic compatibility of a vehicle according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a method for testing electromagnetic compatibility of a vehicle according to a second embodiment of the present invention;
Fig. 3 is a theoretical calculation simulation diagram in the second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a vehicle electromagnetic compatibility testing system according to a third embodiment of the present invention.
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a flowchart of a vehicle electromagnetic compatibility testing method according to a first embodiment of the present invention is shown, and is applied to an ECM testing system, which is communicatively connected to a target vehicle and a field generating device, respectively, and the method includes steps S01 to S03, wherein:
Step S01: after the whole vehicle is electrified, acquiring target vehicle information, placing the field generating device on a theoretical position according to the target vehicle information, and acquiring field intensity values of a plurality of preset points in a test area, wherein the test area is used for placing a target vehicle;
in this step, the target vehicle is the vehicle to be tested, after the vehicle to be tested is powered on, the ECM test system establishes communication with the vehicle-mounted terminal of the vehicle to be tested to receive the target vehicle information uploaded by the vehicle-mounted terminal, and then the ECM test system adjusts the field generating device to a theoretical position according to the target vehicle information and starts to receive field intensity values of a plurality of preset points in the test area, and it is to be noted that the field intensity values under the preset points can be measured by moving the field probe to the corresponding preset points.
Step S02: screening out a maximum field intensity value and a minimum field intensity value from field intensity values corresponding to a plurality of preset points, and judging whether the difference value between the maximum field intensity value and the minimum field intensity value is smaller than a preset field intensity threshold value or not;
In order to accurately judge whether the magnetic field covered by the field generating device at the theoretical position to the test area is uniform or not, in the step, the field intensity values corresponding to all preset points are tested, the maximum field intensity value and the minimum field intensity value are screened out, the difference value of the maximum field intensity value and the minimum field intensity value is compared with a preset field intensity threshold value, if the difference value is smaller than the preset field intensity threshold value, the field intensity difference in the test area is not large, and if the difference value is within the error range, the field intensity is uniform, otherwise, the field intensity is not uniform.
In this embodiment, the preset field strength threshold is related to the actual requirement of the electromagnetic compatibility test, and thus, in this embodiment, a value greater than the preset field strength threshold is not particularly limited.
Step S03: if not, the output power of the field generating device is finely adjusted according to a preset calibration rule, so that the difference value between the finely adjusted maximum field intensity value and the minimum field intensity value is within the preset field intensity threshold value, and an ECM test is started.
It can be appreciated that when the difference between the maximum field intensity value and the minimum field intensity value is detected to be greater than the preset field intensity threshold value, the output power of the field generating device is adjusted based on the preset calibration rule, that is, the output power of the field generating device is continuously increased, so that the field intensity of the preset point is synchronously increased, the difference between the maximum field intensity value and the minimum field intensity value is reduced, the electromagnetic field in the test area is uniform, and then the ECM test is started.
In summary, according to the above-mentioned vehicle electromagnetic compatibility testing method, first, obtain the target vehicle information, and set up the field generator on the theoretical position according to the target vehicle information, then obtain the field intensity value of a plurality of preset points in the test area, and screen out the maximum field intensity value and minimum field intensity value from this, judge whether the electromagnetic field in the test area is even according to the difference of maximum field intensity value and minimum field intensity value, if judge that the difference of maximum field intensity value and minimum field intensity value is greater than the preset field intensity threshold value, fine-tune the output power of the field generator according to the calibration rule of presetting, so as to make the difference within the preset field intensity threshold value, namely within the error, thus realize the required uniform electromagnetic field of electromagnetic compatibility fast, need not to choose a plurality of positions to carry on the repeated test successively, greatly raise the test efficiency, and reduce the test cost.
Referring to fig. 2, a vehicle electromagnetic compatibility testing method according to a second embodiment of the invention is applied to an ECM testing system, and the method includes steps S11 to S21, wherein:
step S11: acquiring size information and vehicle type information of a target vehicle, and setting a test area according to the size information of the target vehicle;
Specifically, in this step, the ECM test system obtains the size information and the vehicle type information of the target vehicle uploaded by the vehicle-mounted terminal, so that the size of the test area, that is, the range required to be covered by the field generating device, can be quickly locked according to the size information of the target vehicle.
Step S12: and according to the vehicle type information, a corresponding preset test field intensity range when the target vehicle is subjected to ECM test is adjusted and taken out from a preset database, so that the output power of the field generating device is estimated according to the preset test field intensity range, and the distance between the field generating device and the target vehicle is calculated according to the size of a test area.
Before the electromagnetic compatibility test is performed on the vehicle, a vehicle factory will pre-establish a database, the database includes test data required by the electromagnetic compatibility test for all vehicle types, and the test data corresponding to the target vehicle, namely, a preset test field intensity range, can be adjusted from the preset database by acquiring the vehicle type information of the target vehicle, and then the output power of the field generating device is estimated according to the preset test field intensity range.
Further, referring to fig. 3, which shows a theoretical calculation simulation diagram, the ECM test system calculates a formula of a distance between the field generating device and the target vehicle according to a size of a test area, where the formula is:
d＝0.5*L/tan a3dB
Where d represents the distance between the field generating device and the target vehicle, L represents the width of the test area, and a 3dB represents the angle of the field generating device at 3dB bandwidth.
Step S13: adjusting and fixing the position of the field generating device according to the shortest distance between the field generating device and the test area and a preset height value;
After the shortest distance between the field generating device and the test area is obtained through calculation, the setting position of the field generating device can be effectively locked, and then the three-dimensional coordinates of the field generating device are determined according to the preset height, so that the position adjustment and the fixation of the field generating device are realized.
Step S14: establishing a corresponding plane contour model according to the test area, wherein the height of the plane contour model is the same as that of the field generating device, and a preset number of test points are selected from the contour model at equal intervals, and field intensity values of all the test points are sequentially obtained;
It can be understood that after the field generating device is turned on, in order to determine whether the magnetic field of the field generating device for estimating the output power covered in the test area is uniform, the ECM test system establishes a completely corresponding contour model according to the test area, then selects a plurality of field strength test points in the contour model, where the field strength test points are preset points, and then monitors the field strengths of the test points sequentially.
In this embodiment, 16 preset points are set in total and are equidistantly arranged in 4*4 square arrays to ensure testing accuracy, and it can be understood that in other embodiments of the present invention, other numbers of test points can be set, so that the purpose of effectively monitoring the magnetic field intensity of the test area can be achieved.
Step S15: sequentially arranging field intensity values corresponding to all the test points according to ascending order, and judging whether the field intensity values corresponding to all the test points are in a preset test field intensity range or not;
It can be understood that after the field strengths of all the test points are monitored respectively, all the obtained field strength values are arranged in order from large to small, and in order to verify whether the output power of the field generating device is greatly deviated or not through the preset test field strength range, the field strength values corresponding to all the test points are analyzed in the step so as to ensure that all the field strength values are within the preset field strength value range.
Step S16: if not, generating fault reminding information and sending the fault reminding information to an administrator of the electromagnetic compatibility test of the vehicle.
If the field intensity values corresponding to one or more test points are not within the preset test field intensity range, the prediction before the description has larger deviation, and at the moment, the ECM test system can generate fault reminding information and send the information to an administrator so as to achieve the aim of reminding.
Step S17: screening out a maximum field intensity value and a minimum field intensity value from field intensity values corresponding to a plurality of preset points, and judging whether the difference value between the maximum field intensity value and the minimum field intensity value is smaller than a preset field intensity threshold value or not;
It should be noted that, in the actual electromagnetic compatibility testing process, the difference between the maximum field intensity value and the minimum field intensity value is within the preset field intensity threshold, which cannot indicate that the field intensities of all the test points are within the preset test field intensity range, and because the difference between the upper limit value and the lower limit value of the preset test field intensity range is generally greater than the preset field intensity threshold, it is necessary to monitor whether the field intensities of the test points are within the preset test field intensity range and monitor whether the difference between the maximum field intensity value and the minimum field intensity value is smaller than the preset field intensity threshold.
Step S18: the output frequency of the field generating device is increased once according to a preset proportion, and the field intensity value of each preset point is detected in real time to screen out the maximum field intensity value, and the maximum field intensity value is recorded as the maximum field intensity value of the period;
It should be noted that, when the ECM test system monitors that the difference between the maximum field intensity value and the minimum field intensity value is greater than the preset field intensity threshold, it indicates that the magnetic field in the test area is not uniform, based on this, in order to quickly adjust the magnetic field in the test area uniformly, the ECM test system increases the output frequency of the field generating device according to the preset proportion, and increases the output frequency of the field generating device, so that the field intensities corresponding to the test points are also continuously increased, thereby effectively reducing the difference between the field intensities of the test points, and ensuring that the magnetic field in the test area is uniform.
Further, the ECM test system monitors the field strength values of each test point after increasing the output frequency of the field generator once.
Step S19: acquiring a test field intensity upper limit value according to the preset test field intensity range, and judging whether the maximum field intensity value of the period is larger than the test field intensity upper limit value;
It should be noted that, while increasing the output power of the field generating device, it is also required to synchronously monitor whether the field intensity value of each corresponding test point exceeds the upper limit value in the preset test field intensity range, if not, returning to step S18 to perform repeated increase until it is monitored that the maximum field intensity value of the current period has exceeded the upper limit value of the test field intensity.
Step 20: if the maximum field intensity value of the period is larger than the upper limit value of the test field intensity, taking the output power of the field generating device in the previous period as the final test power of the ECM test;
It can be understood that when the maximum field intensity value of the current period is monitored to exceed the upper limit value of the test field intensity, the field intensity values of all the test points of the previous period are still within the preset test field intensity range, and the ECM test system defaults to the output power of the field generating device of the previous period as the final test power required by the electromagnetic compatibility test.
Further, after the ECM test system obtains the final test power, the process returns to step S17, where it is repeatedly monitored whether the difference between the maximum field intensity value and the minimum field intensity value of all the test points is less than the preset field intensity threshold.
Step S21: if yes, the ECM test is started.
It can be appreciated that when it is monitored that the difference between the maximum field strength value and the minimum field strength value in all the test points is less than the preset field strength threshold value at the final test frequency, the magnetic field in the test area is determined to be uniform, and at this time, ECM test can be started and relevant test data is recorded.
It should be noted that, if the difference between the maximum field intensity value and the minimum field intensity value is still greater than the preset field intensity threshold under the final test frequency, field intensity early warning information is generated to prompt that the preset test field intensity range currently set by the administrator of the electromagnetic compatibility test of the vehicle may have errors, and the preset test field intensity range needs to be adjusted.
In summary, according to the above-mentioned vehicle electromagnetic compatibility testing method, first, obtain the target vehicle information, and set up the field generator on the theoretical position according to the target vehicle information, then obtain the field intensity value of a plurality of preset points in the test area, and screen out the maximum field intensity value and minimum field intensity value from this, judge whether the electromagnetic field in the test area is even according to the difference of maximum field intensity value and minimum field intensity value, if judge that the difference of maximum field intensity value and minimum field intensity value is greater than the preset field intensity threshold value, fine-tune the output power of the field generator according to the calibration rule of presetting, so as to make the difference within the preset field intensity threshold value, namely within the error, thus realize the required uniform electromagnetic field of electromagnetic compatibility fast, need not to choose a plurality of positions to carry on the repeated test successively, greatly raise the test efficiency, and reduce the test cost.
Referring to fig. 4, a schematic structural diagram of a vehicle electromagnetic compatibility testing system according to a third embodiment of the present invention is shown, and the system is applied to an ECM testing system, wherein the ECM testing system is communicatively connected with a target vehicle and a field generating device, respectively, and the system includes:
the field intensity monitoring module 11 is used for acquiring target vehicle information after the whole vehicle is electrified, placing the field generating device on a theoretical position according to the target vehicle information, and acquiring field intensity values of a plurality of preset points in the test area;
Further, the field strength monitoring module 11 further includes:
The information acquisition unit is used for acquiring the size information and the vehicle type information of the target vehicle and setting a test area according to the size information of the target vehicle;
The calculation unit is used for adjusting out a corresponding preset test field intensity range when the target vehicle is subjected to ECM test from a preset database according to the vehicle type information so as to estimate the output power of the field generating device according to the preset test field intensity range and calculate the shortest distance between the field generating device and the test area according to the size of the test area;
the position adjusting unit is used for adjusting and fixing the position of the field generating device according to the shortest distance between the field generating device and the test area and a preset height value;
The field intensity detection unit is used for establishing a corresponding plane contour model according to the test area, wherein the height of the plane contour model is the same as that of the field generating device, a preset number of test points are selected from the contour model at equal intervals, and field intensity values of all the test points are sequentially obtained;
The field strength analysis module 12 is used for screening out a maximum field strength value and a minimum field strength value from field strength values corresponding to a plurality of preset points, and judging whether the difference value between the maximum field strength value and the minimum field strength value is smaller than a preset field strength threshold value;
And the field intensity calibration module 13 is configured to, if not, perform fine adjustment on the output power of the field generating device according to a preset calibration rule, so that the difference between the maximum field intensity value after fine adjustment and the minimum field intensity value is within the preset field intensity threshold, and start ECM test.
Further, the field strength calibration module 13 further comprises:
the frequency strengthening unit is used for increasing the output frequency of the field generating device once according to a preset proportion, detecting the field intensity value of each preset point in real time to screen out a maximum field intensity value, and recording the maximum field intensity value as the maximum field intensity value of the period;
the first detection unit is used for acquiring a test field intensity upper limit value according to the preset test field intensity range and judging whether the maximum field intensity value of the period is larger than the test field intensity upper limit value or not;
The repeated strengthening unit is used for increasing the output frequency of the period of the field generating device again according to a preset proportion if not;
the second detection unit is used for taking the output power of the field generating device in the previous period as the final test power of the ECM test if the maximum field intensity value in the current period is larger than the upper limit value of the test field intensity, and judging whether the difference value between the maximum field intensity value and the minimum field intensity value in the final test power is smaller than a preset field intensity threshold value or not;
and the test execution unit is used for starting the ECM test if yes.
Further, in some alternative embodiments of the present invention, the system further comprises:
The field intensity early warning module is used for generating field intensity early warning information to prompt that a preset test field intensity range currently set by an administrator of the electromagnetic compatibility test of the vehicle is wrong if the difference value between the maximum field intensity value and the minimum field intensity value under the final test power is larger than a preset field intensity threshold value;
further, in some alternative embodiments of the present invention, the system further comprises:
the first detection module is used for sequentially arranging the field intensity values corresponding to all the test points in an ascending order and judging whether the field intensity values corresponding to all the test points are in a preset test field intensity range or not;
And the fault prompting module is used for generating fault prompting information if not, and sending the fault prompting information to an administrator of the electromagnetic compatibility test of the vehicle.
In summary, according to the vehicle electromagnetic compatibility test system, firstly, target vehicle information is obtained, the field generating device is arranged at a theoretical position according to the target vehicle information, then, field intensity values of a plurality of preset points in a test area are obtained, the maximum field intensity value and the minimum field intensity value are screened out, whether the electromagnetic field in the test area is uniform or not is judged according to the difference value of the maximum field intensity value and the minimum field intensity value, if the difference value of the maximum field intensity value and the minimum field intensity value is judged to be larger than the preset field intensity threshold value, the output power of the field generating device is finely adjusted according to a preset calibration rule, so that the difference value is within the preset field intensity threshold value, namely within an error, even electromagnetic field required by electromagnetic compatibility is rapidly realized, repeated test is not required to be sequentially selected at a plurality of positions, the test efficiency is greatly improved, and the test cost is reduced.
In another aspect, the present invention also provides a computer storage medium having one or more programs stored thereon, which when executed by a processor, implement the above-described vehicle electromagnetic compatibility testing method.
The invention also provides a testing device, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor is used for executing the computer program stored on the memory so as to realize the vehicle electromagnetic compatibility testing method.
Those of skill in the art will appreciate that the logic and/or steps represented in the flow diagrams or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, 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 the purposes of this description, a "computer-readable medium" can be any means that can contain or store the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (8)
1. A method of testing electromagnetic compatibility of a vehicle, applied to an ECM testing system communicatively coupled to a target vehicle and a field generating device, respectively, the method comprising:
After the whole vehicle is electrified, acquiring target vehicle information, placing the field generating device on a theoretical position according to the target vehicle information, and acquiring field intensity values of a plurality of preset points in a test area, wherein the test area is used for placing a target vehicle and comprises the following steps:
Acquiring size information and vehicle type information of a target vehicle, setting a test area according to the size information of the target vehicle,
According to the vehicle type information, a corresponding preset test field intensity range when the target vehicle is subjected to ECM test is adjusted from a preset database so as to estimate the output power of the field generating device according to the preset test field intensity range, and the shortest distance between the field generating device and the test area is obtained through calculation according to the size of the test area;
screening out a maximum field intensity value and a minimum field intensity value from field intensity values corresponding to a plurality of preset points, and judging whether the difference value between the maximum field intensity value and the minimum field intensity value is smaller than a preset field intensity threshold value or not;
If not, fine tuning the output power of the field generating device according to a preset calibration rule, so that the difference value between the fine-tuned maximum field intensity value and the minimum field intensity value is within the preset field intensity threshold value, and starting an ECM test, including:
The output frequency of the field generating device is increased once according to the preset proportion, the field intensity value of each preset point is detected in real time to screen out the maximum field intensity value, the maximum field intensity value is recorded as the maximum field intensity value of the period,
Acquiring an upper limit value of the test field intensity according to a preset test field intensity range, judging whether the maximum field intensity value of the period is larger than the upper limit value of the test field intensity,
If not, the output frequency of the field generating device in the period is increased again according to the preset proportion.
2. The method according to claim 1, wherein the step of retrieving a predetermined test field intensity range corresponding to the target vehicle for ECM test from a predetermined database according to the vehicle type information, estimating the output power of the field generating device according to the predetermined test field intensity range, and calculating the shortest distance between the field generating device and the test area according to the size of the test area further comprises:
Adjusting and fixing the position of the field generating device according to the shortest distance between the field generating device and the test area and a preset height value;
And establishing a corresponding plane contour model according to the test area, wherein the height of the plane contour model is the same as that of the field generating device, and a preset number of test points are selected from the contour model at equal intervals, and field intensity values of all the test points are sequentially obtained.
3. The method for testing electromagnetic compatibility of a vehicle according to claim 2, wherein the step of screening out a maximum field strength value and a minimum field strength value from field strength values corresponding to a plurality of preset points and judging whether a difference between the maximum field strength value and the minimum field strength value is smaller than a preset field strength threshold value further comprises:
sequentially arranging field intensity values corresponding to all the test points according to ascending order, and judging whether the field intensity values corresponding to all the test points are in a preset test field intensity range or not;
if not, generating fault reminding information and sending the fault reminding information to an administrator of the electromagnetic compatibility test of the vehicle.
4. The method for testing electromagnetic compatibility of a vehicle according to claim 3, wherein after the step of obtaining the upper limit value of the test field intensity according to the preset test field intensity range and judging whether the maximum field intensity value of the present period is greater than the upper limit value of the test field intensity, the method further comprises:
If the maximum field intensity value of the period is larger than the upper limit value of the test field intensity, taking the output power of the field generating device in the previous period as the final test power of the ECM test, and judging whether the difference value between the maximum field intensity value and the minimum field intensity value in the final test power is smaller than a preset field intensity threshold value or not;
If yes, the ECM test is started.
5. The vehicle electromagnetic compatibility testing method of claim 4, further comprising:
If the difference value between the maximum field intensity value and the minimum field intensity value under the final test power is larger than the preset field intensity threshold value, field intensity early warning information is generated to prompt that the preset test field intensity range currently set by the administrator of the electromagnetic compatibility test of the vehicle is wrong.
6. A vehicle electromagnetic compatibility detection system for use with an ECM testing system communicatively coupled to a target vehicle and a field generating device, respectively, the system comprising:
The field intensity monitoring module is used for acquiring target vehicle information after the whole vehicle is electrified, placing the field generating device on a theoretical position according to the target vehicle information, and acquiring field intensity values of a plurality of preset points in a test area, and comprises the following steps:
Acquiring size information and vehicle type information of a target vehicle, setting a test area according to the size information of the target vehicle,
According to the vehicle type information, a corresponding preset test field intensity range when the target vehicle is subjected to ECM test is adjusted from a preset database so as to estimate the output power of the field generating device according to the preset test field intensity range, and the shortest distance between the field generating device and the test area is obtained through calculation according to the size of the test area;
The field intensity analysis module is used for screening out a maximum field intensity value and a minimum field intensity value from field intensity values corresponding to a plurality of preset points and judging whether the difference value between the maximum field intensity value and the minimum field intensity value is smaller than a preset field intensity threshold value or not;
The field intensity calibration module is used for carrying out fine adjustment on the output power of the field generating device according to a preset calibration rule if not, so that the difference value between the maximum field intensity value after fine adjustment and the minimum field intensity value is within the preset field intensity threshold value, and ECM test is started, and the method comprises the following steps:
The output frequency of the field generating device is increased once according to the preset proportion, the field intensity value of each preset point is detected in real time to screen out the maximum field intensity value, the maximum field intensity value is recorded as the maximum field intensity value of the period,
Acquiring an upper limit value of the test field intensity according to a preset test field intensity range, judging whether the maximum field intensity value of the period is larger than the upper limit value of the test field intensity,
If not, the output frequency of the field generating device in the period is increased again according to the preset proportion.
7. A storage medium, comprising: the storage medium stores one or more programs that when executed by a processor implement the vehicle electromagnetic compatibility testing method of any one of claims 1-5.
8. A test apparatus comprising a memory and a processor, wherein:
the memory is used for storing a computer program;
the processor is configured to implement the vehicle electromagnetic compatibility testing method of any one of claims 1-5 when executing the computer program stored on the memory.
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