CN113721092A - Method, device, equipment and medium for detecting electromagnetic compatibility radiation emission of whole vehicle - Google Patents
Method, device, equipment and medium for detecting electromagnetic compatibility radiation emission of whole vehicle Download PDFInfo
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Abstract
The embodiment of the invention discloses a method, a device, equipment and a medium for detecting electromagnetic compatibility radiation emission of a whole vehicle, wherein the method comprises the following steps: when an instruction for carrying out radiation emission detection on at least one part to be detected of a target vehicle is detected, controlling the at least one part to be detected to be in a working state; scanning the target vehicle in real time in a preset scanning frequency range within preset scanning time to obtain frequency scanning data; and analyzing the sweep frequency data according to a radiation emission test application program to determine whether the radiation emission intensity of the at least one part to be detected is in a normal state. By the technical scheme of the embodiment of the invention, the whole vehicle can be scanned in real time in the frequency band, and the technical effect of improving the accuracy of electromagnetic compatibility radiation detection is further achieved.
Description
Technical Field
The embodiment of the invention relates to a vehicle electromagnetic detection technology, in particular to a method, a device, equipment and a medium for detecting electromagnetic compatibility radiation emission of a whole vehicle.
Background
At present, when the whole vehicle is subjected to an electromagnetic compatibility radiation emission test, a 10-meter method or a 3-meter method is generally used, and the frequency range is 30MHz to 1 GHz. And opening the long-term working parts to enable the whole vehicle to be in the working state of the maximum load, and carrying out the radiation emission test.
However, in research and development experiments, the electromagnetic compatibility of all electronic and electrical components and systems of the vehicle needs to be more comprehensively examined. The existing testing method scans the radiation emission signals of the vehicle section by section according to a certain step length and residence time in a frequency range, and for the detection of certain intermittently working long-time working parts on the vehicle or the radiation emission signals when the short-time working parts work, the problem that when a receiver scans a certain frequency band, the corresponding signal energy cannot be captured, so that the detection accuracy is low can occur.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a medium for detecting electromagnetic compatibility radiation emission of a whole vehicle, so as to realize real-time scanning of the whole vehicle in a frequency band and further improve the accuracy of electromagnetic compatibility radiation detection.
In a first aspect, an embodiment of the present invention provides a method for detecting electromagnetic compatibility radiation emission of a finished vehicle, where the method includes:
when an instruction for carrying out radiation emission detection on at least one part to be detected of a target vehicle is detected, controlling the at least one part to be detected to be in a working state;
scanning the target vehicle in real time in a preset scanning frequency range within preset scanning time to obtain frequency scanning data;
and analyzing the sweep frequency data according to a radiation emission test application program to determine whether the radiation emission intensity of the at least one part to be detected is in a normal state.
In a second aspect, an embodiment of the present invention further provides a device for detecting electromagnetic compatibility radiation emission of a finished vehicle, where the device includes:
the control module of the part to be detected is used for controlling at least one part to be detected to be in a working state when detecting an instruction for carrying out radiation emission detection on at least one part to be detected of a target vehicle;
the sweep frequency data acquisition module is used for scanning the target vehicle in real time in a preset scanning frequency range within preset scanning time to obtain sweep frequency data;
and the state determination module is used for analyzing the sweep frequency data according to a radiation emission test application program and determining whether the radiation emission intensity of the at least one part to be detected is in a normal state.
In a third aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement a method for detecting vehicle emc emissions as described in any of the embodiments of the present invention.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for detecting electromagnetic compatibility radiation emission of a complete vehicle according to any one of the embodiments of the present invention.
According to the technical scheme of the embodiment of the invention, when an instruction for carrying out radiation emission detection on at least one part to be detected of a target vehicle is detected, the at least one part to be detected is controlled to be in a working state so as to be convenient for detecting the part to be detected, real-time scanning in a preset scanning frequency band is carried out on the target vehicle within a preset scanning time to obtain sweep frequency data, the sweep frequency data is analyzed according to a radiation emission test application program to determine whether the radiation emission intensity of the at least one part to be detected is in a normal state, the problem of low detection accuracy caused by inaccurate detection on intermittently working parts working for a long time or short working parts is solved, real-time scanning of the whole vehicle within the frequency band is realized, and the technical effect of the accuracy of electromagnetic compatibility radiation detection is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, a brief description is given below of the drawings used in describing the embodiments. It should be clear that the described figures are only views of some of the embodiments of the invention to be described, not all, and that for a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 is a schematic flowchart of a method for detecting electromagnetic compatibility radiation emission of a finished vehicle according to a first embodiment of the present invention;
fig. 2 is a schematic flowchart of a method for detecting electromagnetic compatibility radiation emission of a finished vehicle according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a radiation emission testing system according to a third embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a principle of a radiation emission frequency sweep real-time scanning test according to a third embodiment of the present invention;
fig. 5 is a signal data diagram in a scanning process according to a third embodiment of the present invention;
fig. 6 is a data diagram of an abnormal signal in a scanning process according to a third embodiment of the present invention;
fig. 7 is a schematic structural diagram of a detection apparatus for electromagnetic compatibility radiation emission of a finished vehicle according to a fourth embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic flowchart of a method for detecting electromagnetic compatibility radiation emission of a finished vehicle according to an embodiment of the present invention, where this embodiment is applicable to a situation where electromagnetic compatibility radiation emission detection is performed on the finished vehicle, and the method may be performed by a device for detecting electromagnetic compatibility radiation emission of the finished vehicle, where the device may be implemented in the form of software and/or hardware, and the hardware may be electronic equipment, and optionally, the electronic equipment may be a mobile terminal, and the like.
As shown in fig. 1, the method of this embodiment specifically includes the following steps:
and S110, controlling at least one part to be detected to be in a working state when an instruction for detecting radiation emission of at least one part to be detected of the target vehicle is detected.
Wherein the target vehicle may be a vehicle to be subjected to radiation emission detection. The component to be detected may be an electrical component on the target vehicle, for example: wiper motor, cooling fan, electric horn, glass elevator motor etc..
Specifically, when the target vehicle is subjected to radiation emission detection, a corresponding instruction can be generated and sent. When an instruction for carrying out radiation emission detection on at least one part to be detected of the target vehicle is detected, the at least one part to be detected related in the instruction can be started, and the part to be detected is kept in a working state, so that the electromagnetic energy of the at least one part to be detected can be acquired by a subsequent frequency sweep test.
And S120, scanning the target vehicle in real time in a preset scanning frequency range within preset scanning time to obtain frequency scanning data.
The preset scanning time may be a preset scanning time period, or a scanning time period determined according to at least one component to be detected. The preset sweep frequency band may be a preset frequency band for limiting the frequency band of the sweep test, for example: the preset scanning frequency segment may be 30MHz-1GHz, etc. The frequency sweep data may be electromagnetic signal data obtained by a real-time frequency sweep test, or the like.
Specifically, within a preset scanning time, repeated scanning is performed from high to low (or from low to high) within a preset scanning frequency range through a radiation emission test application program, so as to obtain electromagnetic signal data of at least one part to be detected at each frequency point.
It should be noted that parameters such as a frequency range (preset scanning frequency band), a limit requirement, a progressive step length of a scanning frequency, a residence time of each scanning point, and the like may be set in advance in the application test system, so as to perform real-time frequency sweep detection.
It should be noted that, when the preset scanning frequency segment is repeatedly scanned, if the scanning speed is fast enough, the scanning speed can be regarded as a real-time change data set corresponding to each frequency point.
S130, analyzing the sweep frequency data according to the radiation emission test application program, and determining whether the radiation emission intensity of at least one part to be detected is in a normal state.
The radiation emission test application may be test software for acquiring and analyzing electromagnetic signals. The radiation emission intensity can be the signal energy value of the part to be detected at each frequency point.
Specifically, the obtained sweep frequency data can be correspondingly converted and calculated according to the radiation emission test application program, and can be automatically analyzed, and the sweep frequency data can be displayed in the terminal device, for example, in the form of a sweep frequency data graph. Furthermore, the automatic analysis result can be displayed in the terminal device, so that a user can preliminarily obtain the detection result of the electromagnetic compatibility radiation emission of the target vehicle and determine whether the radiation emission intensity of at least one part to be detected of the target vehicle is in a normal state or not when the part to be detected works.
It should be noted that, the user can autonomously analyze whether the radiation emission intensity of the current target vehicle is in a normal state through the sweep frequency data displayed in the terminal device, so as to integrate with the automatic analysis result, and obtain an accurate detection result of the electromagnetic compatibility radiation emission.
According to the technical scheme of the embodiment of the invention, when an instruction for carrying out radiation emission detection on at least one part to be detected of a target vehicle is detected, the at least one part to be detected is controlled to be in a working state so as to be convenient for detecting the part to be detected, real-time scanning in a preset scanning frequency band is carried out on the target vehicle within a preset scanning time to obtain sweep frequency data, the sweep frequency data is analyzed according to a radiation emission test application program to determine whether the radiation emission intensity of the at least one part to be detected is in a normal state, the problem of low detection accuracy caused by inaccurate detection on intermittently working parts working for a long time or short working parts is solved, real-time scanning of the whole vehicle within the frequency band is realized, and the technical effect of the accuracy of electromagnetic compatibility radiation detection is further improved.
Example two
Fig. 2 is a schematic flow chart of a method for detecting electromagnetic compatibility radiation emission of a whole vehicle according to a second embodiment of the present invention, and on the basis of the foregoing embodiments, the present embodiment may refer to the technical solution of the present embodiment for a determination manner of a preset scanning time and a determination manner of an increased abnormal component. The same or corresponding terms as those in the above embodiments are not explained in detail herein.
As shown in fig. 2, the method of this embodiment specifically includes the following steps:
s210, when an instruction for carrying out radiation emission detection on at least one part to be detected of the target vehicle is detected, controlling the at least one part to be detected to be in a working state.
Specifically, when an instruction for detecting radiation emission of at least one component to be detected of the target vehicle is detected, the at least one component to be detected related to the instruction is turned on, and the component to be detected is kept in a working state.
It should be noted that the parts to be detected can be divided into parts to be detected for long-time operation and parts to be detected for short-time operation. The to-be-detected long-time working part can be a part to be detected which is continuously or intermittently operated after being started, but does not stop operating when receiving a closing signal, for example: wiper motors, cooling fans, etc. The part to be detected which works for a short time may be a part to be detected which stops working after reaching a certain target after being opened, for example: an electric horn, a glass lifting motor and the like.
Optionally, if the part to be detected includes a part to be detected that works for a long time, then control at least one part to be detected to be in a working state, including:
and opening at least one long-time working part to be detected.
Specifically, the long-term working part to be detected can be in a working state by opening the long-term working part to be detected.
Optionally, if the component to be detected includes a component to be detected that works for a short time, then controlling at least one component to be detected to be in a working state, including:
starting at least one short-time working part to be detected; and for each short-time working part to be detected, if the short-time working part to be detected stops working within the preset scanning time, restarting the short-time working part to be detected.
Specifically, the short-time working part to be detected is started, and the short-time working part to be detected is kept in a working state within a preset scanning time, namely, when the short-time working part to be detected stops working, the short-time working part to be detected is restarted. By the mode, the part to be detected for short-time working can be ensured to be in a continuous working state within the preset scanning time.
For example, if the short-time working component to be detected is an electric horn, the electric horn can continuously make a sound through program control or long-time pressing of a switch and the like. If the short-time working part to be detected is a glass lifting motor, the glass can be controlled to be lifted to the highest position and then be reversely controlled to be lowered to the lowest position immediately through modes such as program control and the like, and the control is continued so as to control the glass lifting motor to be continuously started. The above-mentioned manner may be referred to as the control manner of other to-be-detected short-time operating components, and other manners may also be adopted, which is not specifically limited in this embodiment.
And S220, determining the working time interval corresponding to each part to be detected.
The working time interval may be a time interval between two activations of the component to be detected.
Specifically, for each part to be detected, the working time interval corresponding to each part to be detected may be determined. If the long-time working part to be detected has the idle time in the middle of working, the idle time can be used as the working time interval. If a time interval exists between two times of opening of the working part to be detected immediately, the time interval can be used as a working time interval.
And S230, determining preset scanning time according to the working time interval of each part to be detected.
Specifically, after the working time intervals of the parts to be detected are determined, the longest working time interval in the working time intervals may be used as the basic scanning time, the preset working time may be added on the basis of the basic scanning time, and the time greater than or equal to the calculated time may be used as the preset scanning time. The preset operating time may be a preset time period, and may be, for example, 10 seconds, 30 seconds, or the like.
Illustratively, the working time interval of the parts a to be detected is 5 seconds, the working time interval of the parts B to be detected is 15 seconds, and the working time interval of the parts C to be detected is 0.5 seconds, then the basic scanning time may be determined to be 15 seconds for the working time intervals of the parts A, B and C to be detected. If the preset operation time is 10 seconds, the preset scanning time may be determined to be a time greater than or equal to 25 seconds, for example, 25 seconds, 30 seconds, and the like.
It should be noted that, the purpose of determining the preset scanning time according to the working time interval of each component to be detected is as follows: in the subsequent frequency sweep test process, each part to be detected can be ensured to have certain working time, and the problem of inaccurate test caused by the fact that the part to be detected is in an interval rest state in the frequency sweep test process due to the fact that the preset scanning time is too short is avoided.
And S240, scanning the target vehicle in real time in a preset scanning frequency range within preset scanning time to obtain frequency scanning data.
Specifically, within a preset scanning time, repeated scanning is performed from high to low (or from low to high) within a preset scanning frequency range through a radiation emission test application program, so as to obtain electromagnetic signal data of at least one part to be detected at each frequency point.
Optionally, the real-time scanning of the target vehicle in the preset scanning frequency band within the preset scanning time may be implemented in the following manner, so as to obtain the frequency scanning data:
scanning the target vehicle in sequence from small to large by adopting each preset scanning frequency point in a preset scanning frequency section as one-time real-time scanning; and scanning the target vehicle at least twice in real time within preset scanning time to obtain frequency scanning data.
The preset scanning frequency point may be a frequency point when data is collected in a preset scanning frequency segment, for example, a preset scanning frequency point is determined every 1 Hz.
Specifically, when the frequency sweep test is performed, each preset scanning frequency point in the preset scanning frequency band may be sequentially scanned from small to large as one real-time scanning, and multiple real-time scanning of the target vehicle is realized within the preset scanning time, that is, multiple frequency sweep data corresponding to each preset scanning frequency point are also provided. Accordingly, the sweep frequency data of multiple real-time scanning can be obtained for subsequent analysis of the electromagnetic compatibility radiation emission state.
And S250, analyzing the sweep frequency data according to the radiation emission test application program, and determining whether the radiation emission intensity of at least one part to be detected is in a normal state.
Specifically, the sweep frequency data is displayed and statistically analyzed according to the radiation emission test application program, and the statistical analysis result is displayed in the terminal device, so that a user can preliminarily obtain the detection result of the electromagnetic compatibility radiation emission of the target vehicle, and whether the radiation emission intensity of at least one part to be detected of the target vehicle is in a normal state or not when the part to be detected works is determined.
Optionally, because the radiation emission intensity of the whole vehicle is limited by corresponding mandatory standards, whether the radiation emission intensity of at least one to-be-detected component of the target vehicle is in a normal state during operation can be judged according to the limitation. The specific steps may include:
step one, processing the sweep frequency data according to a radiation emission test application program to obtain the target radiation emission intensity.
The target emission intensity may be a signal intensity obtained by processing the sweep data, for example: the maximum value or the average value of the signal intensity corresponding to each preset scanning frequency point, and the like.
Specifically, the target emission intensity corresponding to each preset scanning frequency point can be calculated according to a preset calculation formula according to the radiation emission test application program. Furthermore, the target emission intensity of at least one component to be detected in the preset scanning frequency band can be obtained. Optionally, the target radiation emission frequency obtained through analysis and processing may be displayed on the terminal device in the form of a data map, so that a user can visually see the signal intensities of different preset scanning frequency points.
And step two, comparing the target radiation emission intensity with a radiation emission intensity threshold preset in a radiation emission test application program.
Wherein the radiation emission intensity threshold may be an intensity threshold preset according to mandatory criteria.
Specifically, the target radiation emission intensity may be compared with a radiation emission intensity threshold preset in the radiation emission test application. Because the sweep test is data acquisition performed for the whole preset scanning frequency band, the comparison process may be to compare the radiation emission intensity threshold corresponding to each preset scanning frequency point with the target radiation emission intensity corresponding to each preset scanning frequency point.
It should be noted that, if the target radiation emission intensity is the maximum signal intensity value corresponding to each preset scanning frequency point, the radiation emission intensity threshold may be the maximum intensity value preset according to a mandatory standard. If the target radiation emission intensity is the average of the signal intensities corresponding to each preset scanning frequency point, the radiation emission intensity threshold may be an average of the intensities preset according to a mandatory standard.
And step three, if the radiation emission intensity of the target is greater than the radiation emission intensity threshold value, determining that the radiation emission intensity of at least one part to be detected is in an abnormal state, and otherwise, determining that the radiation emission intensity of at least one part to be detected is in a normal state.
Specifically, if the target radiation emission intensity is greater than the radiation emission intensity threshold, it may be determined that at least one abnormal component having a problem exists in at least one component to be detected of the target vehicle, so that the current radiation emission intensity is in an abnormal state. If the target radiation emission intensity is less than or equal to the radiation emission intensity threshold, it can be determined that at least one part to be detected currently participating in detection meets the limitation of the standard requirement, and the current radiation emission intensity is in a normal state.
And S260, if the radiation emission intensity of at least one part to be detected is in an abnormal state, determining an abnormal part in the at least one part to be detected.
The abnormal part can be a part to be detected which causes electromagnetic compatibility radiation emission abnormity in the detection process.
Specifically, if the radiation emission intensity of at least one component to be detected is in an abnormal state, it is necessary to further determine which component to be detected is abnormal. The frequency sweep test can be respectively carried out on each part to be detected, and the part to be detected which enables the radiation emission intensity to be in an abnormal state is determined to be an abnormal part.
Optionally, if only one abnormal component exists, the abnormal component in the at least one component to be detected may be determined by:
sequentially closing each part to be detected, scanning the target vehicle again, and determining whether the current radiation emission intensity is in a normal state; if the current radiation emission intensity is in an abnormal state when the part to be detected is closed, the part to be detected is a normal part; and if the current radiation emission intensity is in a normal state when the part to be detected is closed, determining that the part to be detected is an abnormal part.
Specifically, the running parts to be detected can be closed one by one, and the sweep frequency data obtained by scanning again is analyzed according to the radiation emission test application program to determine whether the current radiation emission intensity is in a normal state. If the radiation emission intensity is still in an abnormal state when a certain part to be detected is turned off, the abnormal part can be determined to be included in the remaining parts to be detected in the working state. If the radiation emission intensity is changed from the abnormal state to the normal state when a certain part to be detected is turned off, the part to be detected which is just turned off can be determined to be an abnormal part.
It should be noted that, if there is more than one abnormal component, the frequency sweep detection may be performed on the closed at least one component to be detected again on the basis of the above manner, so as to further screen the abnormal component.
According to the technical scheme of the embodiment, when an instruction for carrying out radiation emission detection on at least one part to be detected of a target vehicle is detected, the at least one part to be detected is controlled to be in a working state, a working time interval corresponding to the part to be detected is determined for each part to be detected, a preset scanning time is determined according to the working time interval of each part to be detected, so that the time of a frequency sweep test can cover the working time of each part to be detected, real-time scanning in a preset scanning frequency range is carried out on the target vehicle within the preset scanning time to obtain frequency sweep data, the frequency sweep data is analyzed according to a radiation emission test application program to determine whether the radiation emission intensity of the at least one part to be detected is in a normal state, and if the radiation emission intensity of the at least one part to be detected is in an abnormal state, the abnormal part in the at least one part to be detected is determined, the problem of low detection accuracy caused by inaccurate detection of the intermittently working long-time working part or the short-time working part is solved, the accuracy of electromagnetic compatibility radiation detection is improved, and the technical effect of quickly and accurately searching the abnormal part is achieved when the abnormality occurs.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a radiation emission testing system according to a third embodiment of the present invention.
As shown in fig. 3, the system comprises a shielded anechoic chamber filled with wave-absorbing materials, a receiving antenna (composite receiving antenna), a receiver, a coaxial cable, a wall plate connector, a data recording terminal and a vehicle to be tested (target vehicle). A test control room, an antenna mount, a turntable hub, a vehicle condition monitoring system, electromagnetic compatibility test program software, etc., not shown in fig. 3, may also be included.
According to the national standard requirement, the receiving antenna is adjusted to be 3 +/-0.05 m away from the ground, the nearest distance between the center of the antenna and a vehicle is 10 +/-0.2 m or 3 +/-0.2 m, the receiving antenna is connected with a receiver through a coaxial cable and a wall plate connector of a shielding anechoic chamber wall surface filled with wave-absorbing materials, the receiver is connected with a data recording terminal, and the vehicle to be detected is parked on a turntable in the shielding anechoic chamber filled with the wave-absorbing materials.
Fig. 4 is a schematic diagram of a principle of a radiation emission frequency sweep real-time scanning test according to a third embodiment of the present invention.
As shown in fig. 4, before the scan test, it is necessary to perform a background scan on a darkroom and prepare the vehicle under test, for example: functional checking and fault clearing, etc. Next, a test arrangement is performed for the anechoic chamber and the control room, which may include: 1. the receiving antenna is arranged above the antenna bracket, the antenna bracket can automatically adjust the height of the antenna from the ground and the polarity of the antenna, and a pulse amplitude limiter and a preamplifier are connected in series between the receiving antenna and the receiver; 2. the shielding anechoic chamber filled with the wave-absorbing material comprises a lighting system, an air conditioning system, a tail gas discharge system and a rotary table and rotary hub system, and all the systems are started and adjusted; 3. the vehicle state monitoring system comprises a voice monitoring microphone, a video camera and a display; 4. the rotary hub of the rotary table can adjust the tested vehicle parked on the rotary hub by 360 degrees, so that each direction of the tested vehicle can face to the receiving antenna, the electromagnetic compatibility test program software is installed in the data recording terminal, and the test standard limit value and the corresponding test parameters can be set from the test program software.
Optionally, after adjusting the vehicle state and the polarity and position of the receiving antenna as required, the tester connects the test system, opens the receiver and the data recording terminal, opens the electromagnetic compatibility test program software, opens the corresponding radiation emission test application program, can display the current antenna position, the antenna center point distance from the ground and the antenna polarity in the adjustment program, and sets parameters such as the corresponding frequency range, the limit value requirement, the progressive step length of the scanning frequency, the residence time of each scanning point and the like in the program according to the test standard of the test application.
For example, the relevant test parameters in the test program software may be set as follows:
1. scanning frequency: 30MHz to 1 GHz;
2. scanning detector type: peak detection (MaxPeak) and Average detection (Average);
3. resolution Bandwidth (RBW): set to 120 kHz;
4. video Bandwidth (VBW): set to 1 MHz;
5. scanning frequency Points (sweet Points): set to 10001;
6. scan Time (SWEEP Time): set to 2.5 ms;
7. preamplifier (Preamplifier): 20 dB;
8. radio frequency attenuation setting (RF attenuation): 0 dB;
9. reference level setting (reference level): 72dB μ V;
and setting and storing the test parameters, and starting a scanning start command in an application program interface after the test parameters are successfully set, so that SWEEP real-time scanning can be performed.
In the real-time scanning test implementation part, standard real-time scanning test and short-time part operation scanning test are applied.
Standard real-time scan test: the tested vehicle opens all the long-term working parts (parts to be tested) according to the standard requirements, the receiving antenna receives wide and narrow-band electromagnetic signals sent by the vehicle in the frequency range, the signals are transmitted to the receiver through the coaxial cable, the receiver carries out corresponding conversion and calculation on the received corresponding analog signals according to the corresponding parameters set in the front, and finally the analog signals are displayed in the data recording terminal display, so that the testers can observe the test record data. Further, abnormal signal analysis may be performed in comparison with the test standard limit value to determine whether the scanning device is in a normal state, and a signal data graph in the scanning process is shown in fig. 5.
Short-time part operation scan test: in addition to the opening of the parts required by the standard, at the moment, another tester needs to enter a shielding electric wave darkroom filled with wave-absorbing materials, the tester cannot carry any electronic equipment, the short-time parts (to-be-detected short-time working parts) of the vehicle are operated one by one inside and outside the tested vehicle, so that the load operation or the working state of the short-time parts are opened, the tester in the control room guides the tester in the darkroom through a voice and video monitoring system, the tester continuously operates the corresponding parts to operate, the parts are ensured to be in the operating state in the real-time scanning process, meanwhile, the tester in the control room observes the data change of a test program in a data recording terminal in the running process of the parts, and whether the radiation emission intensity of the parts exceeds the limit value at the moment is analyzed. And the short-time parts can be controlled to be in a continuous working state through an external program, so that the human resources can be saved.
The analysis and judgment of the test result can comprise an abnormal signal investigation test: through the sweet real-time scanning test, if the detected vehicle sends an abnormal radiation emission signal exceeding the standard limit value, an abnormal signal data graph in the scanning process is shown in fig. 6. The test system can be continuously applied to carry out problem troubleshooting, and then the emission source is locked. The control room testing personnel guides the testing personnel in the darkroom through the voice and video monitoring system, or closes the running parts one by one through an external program, and observes the data change of the testing program in the data recording terminal, if the abnormal signal disappears after a certain part is closed or a corresponding system power supply is disconnected, the on-off operation of the part can be repeatedly carried out to confirm so as to determine an abnormal signal emission source, and the problem part (abnormal part) is preliminarily locked. The hand-held spectrometer may then be used to further investigate and verify the locked transmission source.
The technical scheme of the embodiment carries out the radiation emission sweep frequency real-time scanning test through the radiation emission test system, all electronic and electric parts on the tested vehicle are scanned with the radiation emission signals in real time in the corresponding frequency band, and when the radiation emission signals of the long-time working parts of the target vehicle are scanned, the radiation emission signal scanning is carried out on the short-time working parts under the condition of function execution so as to ensure the comprehensiveness of test investigation, and can analyze abnormal signals, check the signals and finally lock the emission source of the abnormal radiation emission signals, thereby solving the problem of long-time working parts working intermittently, or the detection accuracy rate is low due to inaccurate detection of short-time working parts, the accuracy rate of electromagnetic compatibility radiation detection is improved, and the technical effect of quickly and accurately finding abnormal parts when the abnormal parts occur is achieved.
Example four
Fig. 7 is a schematic structural diagram of a detection apparatus for electromagnetic compatibility radiation emission of a finished vehicle according to a fourth embodiment of the present invention, where the apparatus includes: a component under inspection control module 310, a sweep data acquisition module 320, and a status determination module 330.
The to-be-detected component control module 310 is configured to control at least one to-be-detected component of a target vehicle to be in a working state when an instruction for performing radiation emission detection on the at least one to-be-detected component is detected; the sweep frequency data acquisition module 320 is configured to perform real-time scanning within a preset scanning frequency band on the target vehicle within a preset scanning time to obtain sweep frequency data; the state determination module 330 is configured to analyze the sweep frequency data according to a radiation emission test application program, and determine whether the radiation emission intensity of the at least one component to be detected is in a normal state.
Optionally, if the component to be detected includes a component to be detected that works for a long time, the component to be detected controls the module 310, and is further configured to start the at least one component to be detected that works for a long time; if the to-be-detected part comprises the to-be-detected short-time working part, the to-be-detected part control module 310 is further configured to start the at least one to-be-detected short-time working part; and for each short-time working part to be detected, if the short-time working part to be detected stops working within the preset scanning time, restarting the short-time working part to be detected.
Optionally, the apparatus further comprises: the scanning time determining module is used for determining a working time interval corresponding to each part to be detected; and determining preset scanning time according to the working time interval of each part to be detected.
The sweep frequency data acquisition module 320 is further configured to scan the target vehicle sequentially according to a sequence from small to large by using each preset scanning frequency point in a preset scanning frequency band, and use the scanning as one real-time scanning; and scanning the target vehicle at least twice in real time within preset scanning time to obtain frequency scanning data.
Optionally, the state determining module 330 is further configured to process the sweep frequency data according to a radiation emission test application program to obtain a target radiation emission intensity; comparing the target radiation emission intensity with a radiation emission intensity threshold preset in the radiation emission test application; and if the target radiation emission intensity is greater than the radiation emission intensity threshold value, determining that the radiation emission intensity of the at least one part to be detected is in an abnormal state, otherwise, determining that the radiation emission intensity of the at least one part to be detected is in a normal state.
Optionally, the apparatus further comprises: and the abnormal part determining module is used for determining the abnormal part in the at least one part to be detected if the radiation emission intensity of the at least one part to be detected is in an abnormal state.
Optionally, the abnormal component determining module is further configured to sequentially turn off each component to be detected, scan the target vehicle again, and determine whether the current radiation emission intensity is in a normal state; if the current radiation emission intensity is in an abnormal state when the part to be detected is closed, the part to be detected is a normal part; and if the current radiation emission intensity is in a normal state when the part to be detected is closed, determining that the part to be detected is an abnormal part.
According to the technical scheme of the embodiment of the invention, when an instruction for carrying out radiation emission detection on at least one part to be detected of a target vehicle is detected, the at least one part to be detected is controlled to be in a working state so as to be convenient for detecting the part to be detected, real-time scanning in a preset scanning frequency band is carried out on the target vehicle within a preset scanning time to obtain sweep frequency data, the sweep frequency data is analyzed according to a radiation emission test application program to determine whether the radiation emission intensity of the at least one part to be detected is in a normal state, the problem of low detection accuracy caused by inaccurate detection on intermittently working parts working for a long time or short working parts is solved, real-time scanning of the whole vehicle within the frequency band is realized, and the technical effect of the accuracy of electromagnetic compatibility radiation detection is further improved.
The detection device for the electromagnetic compatibility radiation emission of the whole vehicle provided by the embodiment of the invention can execute the detection method for the electromagnetic compatibility radiation emission of the whole vehicle provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
It should be noted that, the units and modules included in the apparatus are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the embodiment of the invention.
EXAMPLE five
Fig. 8 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present invention. FIG. 8 illustrates a block diagram of an exemplary electronic device 40 suitable for use in implementing embodiments of the present invention. The electronic device 40 shown in fig. 8 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiment of the present invention.
As shown in fig. 8, electronic device 40 is embodied in the form of a general purpose computing device. The components of electronic device 40 may include, but are not limited to: one or more processors or processing units 401, a system memory 402, and a bus 403 that couples the various system components (including the system memory 402 and the processing unit 401).
The system memory 402 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)404 and/or cache memory 405. The electronic device 40 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 406 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 8, and commonly referred to as a "hard drive"). Although not shown in FIG. 8, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 403 by one or more data media interfaces. System memory 402 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 408 having a set (at least one) of program modules 407 may be stored, for example, in system memory 402, such program modules 407 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 407 generally perform the functions and/or methods of the described embodiments of the invention.
The electronic device 40 may also communicate with one or more external devices 409 (e.g., keyboard, pointing device, display 410, etc.), with one or more devices that enable a user to interact with the electronic device 40, and/or with any devices (e.g., network card, modem, etc.) that enable the electronic device 40 to communicate with one or more other computing devices. Such communication may be through input/output (I/O) interface 411. Also, the electronic device 40 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the internet) via the network adapter 412. As shown, the network adapter 412 communicates with the other modules of the electronic device 40 over the bus 403. It should be appreciated that although not shown in FIG. 8, other hardware and/or software modules may be used in conjunction with electronic device 40, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
The processing unit 401 executes the program stored in the system memory 402 to execute various functional applications and data processing, for example, to implement the method for detecting electromagnetic compatibility radiation emission of the entire vehicle provided by the embodiment of the present invention.
EXAMPLE six
An embodiment of the present invention further provides a storage medium containing computer-executable instructions, where the computer-executable instructions are executed by a computer processor to perform a method for detecting electromagnetic compatibility radiation emission of a finished vehicle, and the method includes:
when an instruction for carrying out radiation emission detection on at least one part to be detected of a target vehicle is detected, controlling the at least one part to be detected to be in a working state;
scanning the target vehicle in real time in a preset scanning frequency range within preset scanning time to obtain frequency scanning data;
and analyzing the sweep frequency data according to a radiation emission test application program to determine whether the radiation emission intensity of the at least one part to be detected is in a normal state.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for embodiments of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method for detecting electromagnetic compatibility radiation emission of a whole vehicle is characterized by comprising the following steps:
when an instruction for carrying out radiation emission detection on at least one part to be detected of a target vehicle is detected, controlling the at least one part to be detected to be in a working state;
scanning the target vehicle in real time in a preset scanning frequency range within preset scanning time to obtain frequency scanning data;
and analyzing the sweep frequency data according to a radiation emission test application program to determine whether the radiation emission intensity of the at least one part to be detected is in a normal state.
2. The method according to claim 1, wherein if the component to be detected comprises a component to be detected which works for a long time, the controlling the at least one component to be detected to be in a working state comprises:
opening the at least one long-term working part to be detected;
if the part to be detected comprises a part to be detected which works for a short time, the step of controlling the at least one part to be detected to be in a working state comprises the following steps:
opening the at least one short-time working part to be detected;
and for each short-time working part to be detected, if the short-time working part to be detected stops working within the preset scanning time, restarting the short-time working part to be detected.
3. The method of claim 1, wherein before performing real-time scanning on the target vehicle within a preset scanning frequency band within the preset scanning time to obtain the sweep data, the method further comprises:
determining a working time interval corresponding to each part to be detected;
and determining preset scanning time according to the working time interval of each part to be detected.
4. The method of claim 1, wherein the scanning the target vehicle in real time within a predetermined scanning frequency band within a predetermined scanning time to obtain sweep data comprises:
scanning the target vehicle in sequence from small to large by adopting each preset scanning frequency point in a preset scanning frequency section as one-time real-time scanning;
and scanning the target vehicle at least twice in real time within preset scanning time to obtain frequency scanning data.
5. The method of claim 1, wherein the analyzing the swept frequency data according to a radiation emission test application to determine whether the radiation emission intensity of the at least one component to be detected is in a normal state comprises:
processing the sweep frequency data according to a radiation emission test application program to obtain target radiation emission intensity;
comparing the target radiation emission intensity with a radiation emission intensity threshold preset in the radiation emission test application;
and if the target radiation emission intensity is greater than the radiation emission intensity threshold value, determining that the radiation emission intensity of the at least one part to be detected is in an abnormal state, otherwise, determining that the radiation emission intensity of the at least one part to be detected is in a normal state.
6. The method of claim 1, wherein after the analyzing the frequency sweep data according to the radiation emission test application program to determine whether the radiation emission intensity of the at least one component to be detected is in a normal state, the method further comprises:
and if the radiation emission intensity of the at least one part to be detected is in an abnormal state, determining an abnormal part in the at least one part to be detected.
7. The method according to claim 6, wherein the determining the abnormal component of the at least one component to be inspected comprises:
sequentially closing each part to be detected, scanning the target vehicle again, and determining whether the current radiation emission intensity is in a normal state;
if the current radiation emission intensity is in an abnormal state when the part to be detected is closed, the part to be detected is a normal part;
and if the current radiation emission intensity is in a normal state when the part to be detected is closed, determining that the part to be detected is an abnormal part.
8. The utility model provides a detection apparatus for whole car electromagnetic compatibility radiation emission which characterized in that includes:
the control module of the part to be detected is used for controlling at least one part to be detected to be in a working state when detecting an instruction for carrying out radiation emission detection on at least one part to be detected of a target vehicle;
the sweep frequency data acquisition module is used for scanning the target vehicle in real time in a preset scanning frequency range within preset scanning time to obtain sweep frequency data;
and the state determination module is used for analyzing the sweep frequency data according to a radiation emission test application program and determining whether the radiation emission intensity of the at least one part to be detected is in a normal state.
9. An electronic device, characterized in that the electronic device comprises:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement a method for detecting full vehicle emc emissions as set forth in any one of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out a method for detecting emc emissions of a vehicle according to any one of claims 1 to 7.
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