CN114217141A - Vehicle electromagnetic compatibility test method, system, storage medium and test equipment - Google Patents
Vehicle electromagnetic compatibility test method, system, storage medium and test equipment Download PDFInfo
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Abstract
The invention provides a vehicle electromagnetic compatibility test method, a vehicle electromagnetic compatibility test system, a storage medium and test equipment, which are applied to an ECM test 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 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 of the maximum field intensity value and the minimum field intensity value after fine adjustment is within a preset field intensity threshold value, and the ECM test is started. The vehicle electromagnetic compatibility testing method provided by the invention can provide a uniform electromagnetic field for testing the vehicle, does not need to frequently adjust the position of the field generating device, and has lower testing cost.
Description
Technical Field
The invention relates to the technical field of electromagnetic compatibility testing, in particular to a vehicle electromagnetic compatibility testing method, a vehicle electromagnetic compatibility testing system, a vehicle electromagnetic compatibility testing storage medium and a vehicle electromagnetic compatibility testing device.
Background
Electromagnetic compatibility testing of automobiles is performed to verify the sensitivity of the electrical and electronic products or systems under test (collectively referred to as test pieces) to external electromagnetic fields. In the test, the transmitting antenna for the electromagnetic compatibility test needs to generate a uniform electromagnetic field in the area of a tested piece, and the whole vehicle needs to be in the range of the antenna main lobe.
According to the relevant test standards, the field generating device (transmitting antenna) used for the electromagnetic compatibility test needs to be arranged 2 meters in front of the vehicle. Although this method has been classified as an international and domestic standard test method, it is often not possible to ensure 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 vehicles are covered by lobes of transmitting antennas, a plurality of arrangement positions are generally selected in sequence and repeatedly tested, but the transmitting antennas need to be frequently moved in the testing mode and the testing needs to be repeatedly carried out, so that the testing time is long and the testing cost is high.
Disclosure of Invention
Based on this, the invention aims to provide a vehicle electromagnetic compatibility testing method, a vehicle electromagnetic compatibility testing system, a vehicle electromagnetic compatibility testing storage medium and a vehicle electromagnetic compatibility testing device, so as to solve the problems of long testing time and high testing cost caused by repeated testing in the traditional mode.
The vehicle electromagnetic compatibility testing method provided by the invention 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 target vehicles;
screening 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 of the maximum field intensity value and the minimum field intensity value after fine adjustment is within the preset field intensity threshold value, and an ECM test is started.
In summary, according to the vehicle electromagnetic compatibility testing method, first, target vehicle information is obtained, the field generating device is arranged at a theoretical position according to the target vehicle information, then, field strength values of a plurality of preset points in a testing area are obtained, a maximum field strength value and a minimum field strength value are screened out, whether an electromagnetic field in the testing area is uniform is judged according to a difference value of the maximum field strength value and the minimum field strength value, if the difference value of the maximum field strength value and the minimum field strength value is judged to be larger than a preset field strength threshold value, 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 strength threshold value, namely within an error, uniform electromagnetic fields required by electromagnetic compatibility are quickly realized, repeated testing is not required to be selected at a plurality of positions successively, testing efficiency is greatly improved, and testing cost is reduced.
Further, the step of obtaining the target vehicle information and placing the field generating device at the 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 calling a corresponding preset test field intensity range of the target vehicle for ECM test from a preset database according to the vehicle type information, estimating 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, the step of retrieving a preset field intensity range corresponding to the ECM test of the target vehicle from a preset database according to the vehicle type information to estimate the output power of the field generating device according to the preset 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, selecting a preset number of test points at equal intervals in the contour model, and sequentially acquiring the field intensity value of each test point.
Further, the step of screening out a maximum field strength value and a minimum field strength value from the field strength values corresponding to the plurality of preset points, and judging whether a difference value between the maximum field strength value and the minimum field strength value is smaller than a preset field strength threshold value further includes:
sequentially arranging the field intensity values corresponding to all the test points according to an ascending order, and judging whether the field intensity value corresponding to each test point is within a preset test field intensity range;
and if not, generating fault reminding information, and sending the fault reminding information to an administrator of the vehicle electromagnetic compatibility test at this time.
Further, if not, the step of finely adjusting the output power of the field generating device according to a preset calibration rule so that the difference value between the finely adjusted maximum field strength value and the minimum field strength value is within the preset field strength threshold value, and starting the ECM test includes:
increasing the output frequency of the field generating device once according to a preset proportion, and detecting the field intensity value of each preset point in real time to screen out the maximum field intensity value, and recording the maximum field intensity value 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 greater than the test field intensity upper limit value or not;
if not, the output frequency of the field generating device in the period is increased again according to the preset proportion.
Further, the step of obtaining the upper limit value of the test field strength according to the preset test field strength range and judging whether the maximum field strength value of the period is greater than the upper limit value of the test field strength further comprises the following steps:
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 of 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 under 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:
and 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, generating field intensity early warning information to prompt that the preset test field intensity range currently set by an administrator of the vehicle electromagnetic compatibility test is wrong.
The vehicle electromagnetic compatibility test system according to the embodiment of the invention 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 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;
and the field intensity calibration module is used for finely tuning the output power of the field generating device according to a preset calibration rule if the output power of the field generating device is not tuned according to the preset calibration rule, so that the difference value between the finely tuned maximum field intensity value and the minimum field intensity value is within the preset field intensity threshold value, and starting an ECM test.
In another aspect, the present invention further provides a storage medium, which includes one or more programs stored in the storage medium, and when executed, the programs implement the vehicle electromagnetic compatibility testing method.
Another aspect of the present invention also provides a test apparatus comprising a memory and a processor, wherein:
the memory is used for storing computer programs;
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 flowchart of a vehicle electromagnetic compatibility testing method according to a first embodiment of the present invention;
FIG. 2 is a flowchart of a vehicle electromagnetic compatibility testing method according to a second embodiment of the present invention;
fig. 3 is a diagram of a theoretical calculation simulation in a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a vehicle electromagnetic compatibility test system according to a third embodiment of the present invention.
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. 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 "secured to" 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 as used herein are 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 in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" 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, applied to an ECM testing system, the ECM testing system being in communication with a target vehicle and a field generating device, respectively, the method including steps S01 to S03, where:
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 target vehicles;
in this step, the target vehicle is the vehicle to be tested, after the vehicle to be tested is powered on, the ECM testing 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, then the ECM testing system adjusts the field generating device to the theoretical position according to the target vehicle information and starts to receive field strength values of a plurality of preset points in the testing area, and it needs to be stated that the field strength values at the preset points can be measured by moving the field probes to the corresponding preset points.
Step S02: screening 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;
it should be noted that, because the vehicle needs to perform the electromagnetic compatibility test in a uniform electromagnetic field, in order to accurately judge whether the magnetic field covered by the field generating device placed at the theoretical position to the test area is uniform, in this step, the field strength values corresponding to all the preset points are tested, and the maximum field strength value and the minimum field strength value are screened out from the field strength values, and the difference value between the maximum field strength value and the minimum field strength value is compared with the preset field strength threshold value, if the difference value is smaller than the preset field strength threshold value, the field strength difference in the test area is not large, and within the error range, the field strength is the uniform field strength area, otherwise, the field strength is not the uniform field strength area.
In this embodiment, the predetermined field strength threshold is related to the actual requirement of the electromagnetic compatibility test, and therefore, the threshold value greater than the predetermined field strength is not particularly limited in this embodiment.
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 of the maximum field intensity value and the minimum field intensity value after fine adjustment is within the preset field intensity threshold value, and an ECM test is started.
It can be understood that, when the difference between the maximum field strength value and the minimum field strength value is greater than the preset field strength 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 strength of the preset point is synchronously increased, the difference between the maximum field strength value and the minimum field strength value is reduced, the electromagnetic field in the test area is uniform, and then the ECM test is started.
In summary, according to the vehicle electromagnetic compatibility testing method, first, target vehicle information is obtained, the field generating device is arranged at a theoretical position according to the target vehicle information, then, field strength values of a plurality of preset points in a testing area are obtained, a maximum field strength value and a minimum field strength value are screened out, whether an electromagnetic field in the testing area is uniform is judged according to a difference value of the maximum field strength value and the minimum field strength value, if the difference value of the maximum field strength value and the minimum field strength value is judged to be larger than a preset field strength threshold value, 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 strength threshold value, namely within an error, uniform electromagnetic fields required by electromagnetic compatibility are quickly realized, repeated testing is not required to be selected at a plurality of positions successively, testing efficiency is greatly improved, and testing cost is reduced.
Referring to fig. 2, a vehicle electromagnetic compatibility testing method according to a second embodiment of the present 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 testing system obtains the size information and the model information of the target vehicle uploaded by the vehicle-mounted terminal, so that the size of the test area, that is, the range that the field generating device needs to cover, can be quickly locked according to the size information of the target vehicle.
Step S12: and calling a corresponding preset test field intensity range of the target vehicle for ECM test from a preset database according to the vehicle type information, estimating the output power of the field generating device according to the preset test field intensity range, and calculating the distance between the field generating device and the target vehicle according to the size of a test area.
It should be noted that, before the vehicle is subjected to the electromagnetic compatibility test, a vehicle manufacturer may pre-establish a database, where the database includes test data required by the electromagnetic compatibility test for all vehicle types, and by obtaining the vehicle type information of the target vehicle, the test data corresponding to the target vehicle, that is, the preset test field intensity range, may be retrieved from the preset database, and then the output power of the field generating device may be estimated according to the preset test field intensity range.
Further, referring to fig. 3, which is a theoretical calculation simulation diagram, the ECM testing system calculates the distance between the field generating device and the target vehicle according to the size of the test area according to the following formula:
d＝0.5*L/tan a3dB
wherein d represents the distance between the field generating device and the target vehicle, L represents the width of the test area, a3dBRepresenting the angle of the field generating means at a 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;
it should be noted that 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 coordinate of the field generating device is determined according to the preset height, so as to adjust and fix the position of the field generating device, it can be understood that the output power and the position of the field generating device are all determined, and at this time, the field generating device is turned on, in this embodiment, the preset height is generally set to be more than 0.25 m.
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, selecting a preset number of test points at equal intervals in the contour model, and sequentially obtaining the field intensity value of each test point;
it can be understood that, after the field generating device is turned on, in order to judge whether the magnetic field of the field generating device with the estimated output power covered in the test area is uniform, at this moment, the ECM test system establishes a completely corresponding profile model according to the test area, then selects a plurality of field strength test points in the profile model, the field strength test points are preset points, and then monitors the field strength of each test point in sequence.
In this embodiment, a total of 16 preset points are set and arranged in a 4 × 4 square matrix at equal intervals to ensure the test accuracy, and it can be understood that in other embodiments of the present invention, other numbers of test points may be set, and the purpose of effectively monitoring the magnetic field strength in the test area can also be achieved.
Step S15: sequentially arranging the field intensity values corresponding to all the test points according to an ascending order, and judging whether the field intensity value corresponding to each test point is within a preset test field intensity range;
it can be understood that after the field strengths of all the test points are respectively monitored, all the obtained field strength values are arranged from large to small, and in order to verify whether the output power of the field generating device is estimated to have large deviation 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: and if not, generating fault reminding information, and sending the fault reminding information to an administrator of the vehicle electromagnetic compatibility test at this time.
It should be noted that, if the field strength value corresponding to one or more test points is not within the preset test field strength range, it is indicated that a large deviation exists in the estimation before, and at this time, the ECM test system generates a fault prompting message and sends the message to an administrator, so as to achieve the purpose of prompting.
Step S17: screening 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;
it should be noted that, in the actual electromagnetic compatibility testing process, the difference between the maximum field strength value and the minimum field strength value within the preset field strength threshold value cannot indicate that the field strengths of all the testing points are within the preset testing field strength range, and because the difference between the upper limit value and the lower limit value of the preset testing field strength range is generally greater than the preset field strength threshold value, it is very necessary to monitor whether the field strength of each testing point is within the preset testing field strength range and to monitor whether the difference between the maximum field strength value and the minimum field strength value is less than the preset field strength threshold value.
Step S18: increasing the output frequency of the field generating device once according to a preset proportion, and detecting the field intensity value of each preset point in real time to screen out the maximum field intensity value, and recording the maximum field intensity value as the maximum field intensity value of the period;
it should be noted that, when the ECM testing system monitors that the difference between the maximum field strength value and the minimum field strength value is greater than the preset field strength threshold, it indicates that the magnetic field in the testing area is not uniform, and based on this, in order to quickly adjust the magnetic field in the testing area uniformly, at this time, the ECM testing system increases the output frequency of the field generating device according to the preset proportion, and by increasing the output frequency of the field generating device, the field strength corresponding to each testing point is also continuously increased, so that the difference between the field strengths of each testing point is effectively reduced, and the magnetic field in the testing area is ensured to be uniform.
Furthermore, after the output frequency of the field generating device is increased once, the ECM testing system still monitors the field intensity value of each testing point.
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 greater than the test field intensity upper limit value or not;
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 strength value of each corresponding test point exceeds the upper limit value in the preset test field strength range, and if not, go back to step S18 to increase repeatedly until it is monitored that the maximum field strength value of the current period exceeds the upper limit value of the test field strength.
Step 20: if the maximum field intensity value of the period is larger than the upper limit value of the test field intensity, the output power of the field generating device in the previous period is used as the final test power of the ECM test;
it can be understood that, when it is monitored that the maximum field strength value of the current period exceeds the upper limit value of the test field strength, it indicates that the field strength values of all the test points of the previous period are still within the preset test field strength range, and at this time, 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 testing system obtains the final test power, the step S17 is returned to, and whether the difference between the maximum field strength value and the minimum field strength value of all the test points is smaller than the preset field strength threshold value is repeatedly monitored.
Step S21: if yes, the ECM test is started.
It can be understood that, when it is monitored that the difference value between the maximum field strength value and the minimum field strength value in all the test points is smaller than the preset field strength threshold value under the final test frequency, the magnetic field in the test area is judged to be uniform, at this moment, the ECM test can be started, and relevant test data can be recorded.
It should be noted that, if the difference between the maximum field strength value and the minimum field strength value is still greater than the preset field strength threshold value at the final test frequency, field strength early warning information is generated to prompt that the preset test field strength range currently set by the administrator of the vehicle electromagnetic compatibility test may have an error, and the preset test field strength range needs to be adjusted.
In summary, according to the vehicle electromagnetic compatibility testing method, first, target vehicle information is obtained, the field generating device is arranged at a theoretical position according to the target vehicle information, then, field strength values of a plurality of preset points in a testing area are obtained, a maximum field strength value and a minimum field strength value are screened out, whether an electromagnetic field in the testing area is uniform is judged according to a difference value of the maximum field strength value and the minimum field strength value, if the difference value of the maximum field strength value and the minimum field strength value is judged to be larger than a preset field strength threshold value, 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 strength threshold value, namely within an error, uniform electromagnetic fields required by electromagnetic compatibility are quickly realized, repeated testing is not required to be selected at a plurality of positions successively, testing efficiency is greatly improved, and testing cost is reduced.
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, which is applied to an ECM testing system, the ECM testing system is respectively connected to a target vehicle and a field generating device in a communication manner, 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 detection 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 calling out a corresponding preset test field intensity range of the target vehicle for ECM test from a preset database according to the vehicle type information, estimating the output power of the field generation device according to the preset test field intensity range, and calculating the shortest distance between the field generation 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;
a field intensity detecting unit used for establishing a corresponding plane outline model according to the test area, wherein the height of the plane outline model is the same as that of the field generating device, selecting a preset number of test points at equal intervals in the outline model, and sequentially acquiring the field intensity value of each test point
The field intensity analysis module 12 is configured to screen a maximum field intensity value and a minimum field intensity value from field intensity values corresponding to a plurality of preset points, and determine whether a difference value between the maximum field intensity value and the minimum field intensity value is smaller than a preset field intensity threshold value;
and the field intensity calibration module 13 is configured to, if not, finely tune the output power of the field generation device according to a preset calibration rule, so that a difference value between the finely tuned maximum field intensity value and the minimum field intensity value is within the preset field intensity threshold, and start an ECM (electronic control model) test.
Further, the field strength calibration module 13 further includes:
the frequency enhancing unit is used for increasing the output frequency of the field generating device once according to a preset proportion, and detecting the field intensity value of each preset point in real time to screen out the maximum field intensity value which is recorded 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 greater than the test field intensity upper limit value or not;
the repeated strengthening unit is used for increasing the output frequency of the field generating device in the period again according to the preset proportion if the output frequency is not increased;
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 strength value in the current period is greater than the upper limit value of the test field strength, and judging whether the difference value between the maximum field strength value and the minimum field strength value under the final test power is smaller than a preset field strength threshold value or not;
and the test execution unit is used for starting the ECM test if the test execution unit is used for starting the ECM test.
Further, in some optional embodiments of the present invention, the system further comprises:
a field intensity early warning module for generating field intensity early warning information 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 so as to prompt that the preset test field intensity range currently set by the administrator of the vehicle electromagnetic compatibility test has error
Further, in some optional 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 ascending order and judging whether the field intensity values corresponding to all the test points are within a preset test field intensity range or not;
and the fault prompting module is used for generating fault prompting information if the fault prompting information is not generated, and sending the fault prompting information to an administrator of the vehicle electromagnetic compatibility test.
In summary, according to the vehicle electromagnetic compatibility testing system, first, target vehicle information is obtained, the field generating device is arranged at a theoretical position according to the target vehicle information, then, field strength values of a plurality of preset points in the testing area are obtained, a maximum field strength value and a minimum field strength value are screened out, whether an electromagnetic field in the testing area is uniform is judged according to a difference value between the maximum field strength value and the minimum field strength value, if the difference value between the maximum field strength value and the minimum field strength value is judged to be larger than a preset field strength threshold value, 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 strength threshold value, namely within an error, uniform electromagnetic fields required by electromagnetic compatibility are quickly realized, repeated testing at a plurality of positions does not need to be selected successively, testing efficiency is greatly improved, and testing cost is reduced.
In another aspect, the present invention further provides a computer storage medium, on which one or more programs are stored, which when executed by a processor implement the vehicle electromagnetic compatibility testing method described above.
In another aspect of the present invention, a testing apparatus is further provided, which includes a memory for storing a computer program and a processor for executing the computer program stored in the memory to implement the vehicle electromagnetic compatibility testing method.
Those of skill in the art will understand that the logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be viewed as 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, store, communicate, propagate, or transport 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). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can 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 should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A vehicle electromagnetic compatibility detection method is applied to an ECM (electronic control machine) test system, wherein the ECM test system is respectively in communication connection with a target vehicle and a field generation 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 target vehicles;
screening 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 of the maximum field intensity value and the minimum field intensity value after fine adjustment is within the preset field intensity threshold value, and an ECM test is started.
2. The vehicle electromagnetic compatibility testing method according to claim 1, wherein the step of obtaining target vehicle information and placing the field generating device in a theoretical position according to the target vehicle information comprises:
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 calling a corresponding preset test field intensity range of the target vehicle for ECM test from a preset database according to the vehicle type information, estimating 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.
3. The vehicle electromagnetic compatibility testing method according to claim 2, wherein the step of retrieving a preset testing field strength range corresponding to the target vehicle when the target vehicle is subjected to the ECM test from a preset database according to the vehicle type information, estimating the output power of the field generating device according to the preset testing field strength range, and calculating the shortest distance between the field generating device and the testing area according to the size of the testing area further comprises the following steps:
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, selecting a preset number of test points at equal intervals in the contour model, and sequentially acquiring the field intensity value of each test point.
4. The vehicle electromagnetic compatibility testing method according to claim 3, wherein the step of screening the maximum field strength value and the minimum field strength value from the field strength values corresponding to the 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 further comprises the steps of:
sequentially arranging the field intensity values corresponding to all the test points according to an ascending order, and judging whether the field intensity value corresponding to each test point is within a preset test field intensity range;
and if not, generating fault reminding information, and sending the fault reminding information to an administrator of the vehicle electromagnetic compatibility test at this time.
5. The vehicle electromagnetic compatibility testing method according to claim 1, wherein the step of if not, finely adjusting the output power of the field generating device according to a preset calibration rule so that the difference between the finely adjusted maximum field strength value and the minimum field strength value is within the preset field strength threshold value, and starting the ECM test comprises:
increasing the output frequency of the field generating device once according to a preset proportion, and detecting the field intensity value of each preset point in real time to screen out the maximum field intensity value, and recording the maximum field intensity value 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 greater than the test field intensity upper limit value or not;
if not, the output frequency of the field generating device in the period is increased again according to the preset proportion.
6. The vehicle electromagnetic compatibility testing method according to claim 5, wherein the step of obtaining a testing field strength upper limit value according to the preset testing field strength range and judging whether the maximum field strength value of the period is greater than the testing field strength upper limit value further comprises the following steps:
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 of 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 under the final test power is smaller than a preset field intensity threshold value or not;
if yes, the ECM test is started.
7. The vehicle electromagnetic compatibility testing method according to claim 6, characterized in that the method further comprises:
and 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, generating field intensity early warning information to prompt that the preset test field intensity range currently set by an administrator of the vehicle electromagnetic compatibility test is wrong.
8. A vehicle electromagnetic compatibility testing 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 the test area;
the field intensity analysis module is used for screening 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;
and the field intensity calibration module is used for finely tuning the output power of the field generating device according to a preset calibration rule if the output power of the field generating device is not tuned according to the preset calibration rule, so that the difference value between the finely tuned maximum field intensity value and the minimum field intensity value is within the preset field intensity threshold value, and starting an ECM test.
9. A storage medium, comprising: the storage medium stores one or more programs which, when executed by a processor, implement the vehicle electromagnetic compatibility testing method according to any one of claims 1 to 7.
10. A test device, comprising a memory and a processor, wherein:
the memory is used for storing computer programs;
the processor is configured to implement the vehicle electromagnetic compatibility testing method according to any one of claims 1 to 7 when executing the computer program stored in the memory.
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