CN102749539B - Fast electromagnetic compatibility test and diagnosis system with quantization electromagnetic interference - Google Patents
Fast electromagnetic compatibility test and diagnosis system with quantization electromagnetic interference Download PDFInfo
- Publication number
- CN102749539B CN102749539B CN201210217966.1A CN201210217966A CN102749539B CN 102749539 B CN102749539 B CN 102749539B CN 201210217966 A CN201210217966 A CN 201210217966A CN 102749539 B CN102749539 B CN 102749539B
- Authority
- CN
- China
- Prior art keywords
- frequency
- frequency spectrum
- radiation
- abnormal
- amplitude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a fast electromagnetic compatibility test and diagnosis system with quantization electromagnetic interference. A receiving antenna of the system is arranged on a frequency spectrum tester, a chuck end of a current probe is clamped on a cable through which tested objects are connected, the other end of the current probe is connected on the frequency spectrum tester which is connected with a computer; and the computer is internally provided with a fast electromagnetic compatibility test and diagnosis unit. The fast electromagnetic compatibility test and diagnosis unit is used for fast testing the electromagnetic-transmitted frequency spectrum of the tested objected on site, conducting analysis and diagnosis to the electromagnetic-transmitted frequency spectrum, and judging whether the electromagnetic transmission characteristic exceeds a standard limit value or has abnormality. The fast electromagnetic compatibility test and diagnosis system has important meaning on solving the electromagnetic compatibility problem and monitoring and evaluating the electromagnetic environment.
Description
Technical field
What the present invention relates to is a kind of quick test diagnosis system of electromagnetic compatibility that quantizes electromagnetic interference (EMI) that has, and belongs to the Electromagnetic Interference Test technical field in electromagnetic compatibility technology.
Background technology
Along with scientific and technical development, each corner that increasing electronics, electrical equipment enter society.In limited space, electronic equipment, electrical equipment density increase, and the power of equipment is increasing, and radio-frequency spectrum is day by day crowded, causes the electromagnetic environment of the finite space to go from bad to worse.The in the situation that of how limited in time, space, frequency spectrum resource, electronic equipment, electrical equipment in same electromagnetic environment are not interfere with each other, and normally operation, become an important problem, i.e. the problem of the required solution of electromagnetic compatibility (EMC-Electromagnetic Compatibility).
" engineering electromagnetic compatibility " (author: V.Prasad Kodali that People's Telecon Publishing House published on September 14th, 2006, translator: Chen Shufeng, high formal guiding principle, Soviet Union and Eastern Europe woods, Zhou Bihua) in a book, point out that electromagnetic compatibility refers to that device, equipment or system can either bring into play satisfactorily its function in its residing electromagnetic environment, and meanwhile the electromagnetic disturbance that exceedes tolerance limit is not introduced to any other the ability of device, equipment or system in this environment.Device, equipment or system, in the time of work, inevitably produce external Electromagnetic Launching.In the time that this transmitting exceedes certain tolerance limit, just may cause other devices, equipment or system performance in environment to decline, there is electromagnetic interference (EMI) phenomenon.
For whether the Electromagnetic Launching of checking test specimen exceeds standard, need to carry out Electromagnetic Interference Test.At present, the most frequently used laboratory method of Electromagnetic Interference Test is to use microwave dark room.Microwave dark room is a kind of indoor test facility, and outside electromagnetic environment is had to higher isolation, and therefore microwave dark room is especially applicable to relating to the high sensitivity testing of feeble signal.But the construction cost of microwave dark room is generally very high.
The mechanism that electromagnetic interference (EMI) arrives disturbed equipment from its source is a lot, is mainly radiation and conduction.Radiation-emitting to test specimen is tested, test specimen is placed in to shielded anechoic chamber, receiving antenna is placed in the measuring distance fixing apart from test specimen (1m, 3m or 10m), and the cable of crossing by accurate calibration is connected to the receiver of testing radiation transmitting, the test specimen launching electrical level input computing machine that the receiver of testing radiation transmitting is obtained, in computing machine, compare with corresponding ultimate value, thereby judge whether test specimen radiation-emitting exceeds standard.Conduction transmission test comprises cable conduction transmitting and port conduction transmitting etc., and test thinking and radiation emission test are similar.Different, cable conduction transmission test does not use receiving antenna but uses the conduction of current probe detection streamer, and port conduction transmission test uses direct-connected mode detection port conduction.(see document: engineering electromagnetic compatibility, V.Prasad Kodali, People's Telecon Publishing House, Page(s): 116-120).
These tests all complete in darkroom, test process more complicated.
Summary of the invention
Increasing along with electronics, electrical equipment, the electromagnetic compatibility problem of equipment room becomes increasingly conspicuous, and how to judge whether an equipment (test specimen) produces to external world electromagnetic interference (EMI) and become a major issue.In order to overcome, microwave dark room method cost is high, operation realizes complicated deficiency, the invention provides a kind of quick test diagnosis system of electromagnetic compatibility that quantizes electromagnetic interference (EMI) that has.The software platform combined with hardware equipment that this system is built based on Labview; in order to the Electromagnetic Launching frequency spectrum of field quick detection test specimen; and its Electromagnetic Launching frequency spectrum is carried out to analyzing and diagnosing, judge whether its Electromagnetic Launching characteristic abnormal or the value of going beyond the limit of standard occur.System of the present invention can conveniently be carried out on-the-spot Electromagnetic Interference Test, analysis, diagnosis to test specimen.
A kind of quick test diagnosis system of electromagnetic compatibility that quantizes electromagnetic interference (EMI) that has of the present invention, this system detects test carrying out by computer interactive interface control, obtains frequency spectrum relevant information.Under detection test interface, select test measurement antenna or current probe used and test RF cable used, test-types is set.In the time that line matching is good, the level value that spectrum measurement module reads is the obtained radio-frequency voltage of instrument input port.Equipment is saved to measurement antenna, current probe coefficient and cable waste in database, and in the time detecting test, according to the testing apparatus of selecting, the data that spectrum measurement instrument is obtained are carried out corresponding automatic correction.After experimental test starts, the experimental test information such as typing test specimen, the running parameter of spectrum measurement instrument is set, comprise initial termination frequency, datum, decay, RBW, sweep time etc., spectrum measurement instrument instrument is started working, electromagnetic compatibility is tested fast diagnosis unit software collection data and is revised demonstration, and result is saved to and in computing machine, generates quick diagnosis comparison database.Test by detection, can obtain radiation-emitting frequency spectrum, cable source line conduction emission spectrum, terminal port antennae terminal conduction emission spectrum and the electromagnetic environment electromagnetic spectrum information of test specimen.
The present invention utilizes electromagnetic compatibility that Labview8.5 Programming with Pascal Language obtains to test fast diagnosis unit and includes spectral coefficient correcting module 301, radiation frequency spectrum noise elimination module 302, radiation frequency spectrum filtration module 303, Emanations Analysis diagnostic module 304, the dynamic display module 305 of environment electromagnetics frequency spectrum, cable conduction analyzing and diagnosing module 306, port conduction analyzing and diagnosing module 307; Spectral coefficient correcting module 301 is for carrying out correcting process to the first radiation-emitting frequency spectrum FA (a) receiving, the second radiation-emitting frequency spectrum FA (b), environment electromagnetics frequency spectrum FB, cable conduction frequency spectrum FC and port conduction frequency spectrum FD; Radiation frequency spectrum noise elimination module 302, radiation frequency spectrum filtration module 303 and Emanations Analysis diagnostic module 304 are processed revised the first radiation-emitting frequency spectrum FA (a), the second radiation-emitting frequency spectrum FA (b) in turn; The dynamic display module 305 of environment electromagnetics frequency spectrum is for the revised environment electromagnetics frequency spectrum FB of demonstration directly perceived; Cable conduction analyzing and diagnosing module 306, for revised cable conduction frequency spectrum FC is carried out and typical curve contrast, is found out abnormal frequency; Port conduction analyzing and diagnosing module 307, for revised port conduction frequency spectrum FD is carried out and typical curve contrast on the one hand, is found out abnormal frequency; Carry out on the other hand and CE106 ultimate value curve comparison, find out the frequency that exceeds standard.
The advantage of the quick test diagnosis system of electromagnetic compatibility of the present invention is:
1. the present invention is based on the software platform that Labview8.5 builds, combined with hardware equipment (as computing machine, spectrum measurement instrument), can obtain at the scene radiation-emitting frequency spectrum, cable conduction frequency spectrum and the port conduction frequency spectrum of test specimen, and compare with corresponding ultimate value curve, simplify and fast the electromagnetic compatibility characteristic of test specimen is carried out to testing and diagnosing, judge whether its Electromagnetic Launching exceeds standard, and test without test specimen is delivered to special microwave dark room from scene, save a large amount of time and manpower.Meanwhile, the manufacturing cost and use cost of the quick test diagnosis system of electromagnetic compatibility is more much lower than microwave dark room.
2. the present invention utilizes electromagnetic compatibility that Labview8.5 Programming with Pascal Language obtains to test fast diagnosis unit spectrum measurement instrument and computing machine are integrated together, and small volume, relatively carries transportation, and shockproof, anti-high and low-temp, has stronger environmental suitability.
3. the data conclusion that testing and diagnosing of the present invention obtains is stored in computing machine, conveniently calls and checks.In addition, except comparing with ultimate value curve, the present invention can also compare analysis by the emission spectrum curve under the emission spectrum curve of test specimen and test specimen normal operating conditions, judges whether its Electromagnetic Launching characteristic has occurred extremely.
4. system of the present invention can also detect in real time to electromagnetic environment.
Accompanying drawing explanation
Fig. 1 is the required hardware block diagram of the quick test diagnosis system of electromagnetic compatibility of the present invention.
Fig. 2 is the functional block diagram that electromagnetic compatibility of the present invention is tested diagnosis unit fast.
Fig. 2 A is the dynamic display interface of environment electromagnetics frequency spectrum of the present invention.
Fig. 3 A is the background environment spectrogram under test specimen off-mode.
The spectrogram that Fig. 3 B comprises background environment while being test specimen work.
Fig. 3 C is the test specimen radiation-emitting spectrogram after background filtering.
Fig. 4 is the analyzing and diagnosing figure of antenna terminal conduction transmitting and ultimate value.
Fig. 5 is the analyzing and diagnosing figure of radiation-emitting and historical data.
Fig. 6 is a certain moment background environment electromagnetic spectrum figure.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Shown in Figure 1, a kind of quick test diagnosis system of electromagnetic compatibility that quantizes electromagnetic interference (EMI) that has of the present invention, the hardware device that this system comprises has receiving antenna 11, current probe 12, spectrum measurement instrument 20 and computing machine 30; In described computing machine 30, electromagnetic compatibility is installed and tests fast diagnosis unit; Described electromagnetic compatibility is tested diagnosis unit fast for adopting Labview 8.5 Programming with Pascal Language to obtain.Annexation between hardware device is: receiving antenna 11 is connected on spectrum measurement instrument 20 by RF cable, the chuck end of current probe 12 is clipped on the power cable of test specimen, the output terminal of current probe 12 is connected on spectrum measurement instrument 20 by probe cable, test specimen is connected on spectrum measurement instrument 20 by port cable, and spectrum measurement instrument 20 is connected by data line with computing machine 30.
Receiving antenna 11 for receiving radiation-emitting signal VA and the environment electromagnetics signal VB of space test specimen transmitting on 1m, 3m or 10m fixed range;
In the present invention, in order to realize the object of low interference, high precision measurement, under test specimen outage condition, spectrum measurement instrument 20 converts the radiation-emitting signal VA receiving to electromagnetic compatibility that the first radiation-emitting frequency spectrum FA (a) exports in computing machine 30 and tests fast diagnosis unit; Under test specimen compressor start up condition, spectrum measurement instrument 20 converts the radiation-emitting signal VA receiving to electromagnetic compatibility that the second radiation-emitting frequency spectrum FA (b) exports in computing machine 30 and tests fast diagnosis unit.
In the present invention, current probe 12 is selected the BCP-514 wideband current probe that AHS company produces; The survey frequency scope of this current probe 12 is 10kHz～100MHz.
In the present invention, receiving antenna 11 is selected the omnidirectional antenna that A.H.Systems company produces.In described omnidirectional antenna, include the active telescopic antenna of SAS-550-1, survey frequency scope is 10kHz～60MHz; SAS-542 biconical antenna, survey frequency scope is 20MHz～330MHz; SAS-570 double-ridged horn antenna, survey frequency scope is 170MHz～3GHz; SAS-571 double-ridged horn antenna, survey frequency scope is 700MHz～18GHz.
In the present invention, the MS2726c hand-held spectrum analyzer that spectrum measurement instrument 20 selects Anritsu company to produce, survey frequency scope is 9kHz～43GHz.
In the present invention, computing machine 30 be a kind of can be according to the program of prior storage, automatically, the modernization intelligent electronic device that carries out at high speed massive values computation and various information processings.Minimalist configuration is CPU 2GHz, internal memory 2GB, hard disk 100GB; Operating system is windows XP.Computing machine 30 can move Labview 8.5 programming softwares.In order to realize the Electromagnetic Launching abnormity diagnosis in digitizing electromagnetic compatibility, the Electromagnetic Launching information under test specimen normal operating conditions is kept in the storer of computing machine, described Electromagnetic Launching information has formed quick diagnosis comparison database.The spectrum curve that data in described quick diagnosis comparison database are depicted as is called typical curve.
Shown in Figure 2, electromagnetic compatibility is tested fast diagnosis unit and is included spectral coefficient correcting module 301, radiation frequency spectrum noise elimination module 302, radiation frequency spectrum filtration module 303, Emanations Analysis diagnostic module 304, the dynamic display module 305 of environment electromagnetics frequency spectrum, cable conduction analyzing and diagnosing module 306, port conduction analyzing and diagnosing module 307; Spectral coefficient correcting module 301 is for carrying out correcting process to the first radiation-emitting frequency spectrum FA (a) receiving, the second radiation-emitting frequency spectrum FA (b), environment electromagnetics frequency spectrum FB, cable conduction frequency spectrum FC and port conduction frequency spectrum FD; Radiation frequency spectrum noise elimination module 302, radiation frequency spectrum filtration module 303 and Emanations Analysis diagnostic module 304 are processed revised the first radiation-emitting frequency spectrum FA (a), the second radiation-emitting frequency spectrum FA (b) in turn; The dynamic display module 305 of environment electromagnetics frequency spectrum is for the revised environment electromagnetics frequency spectrum FB of demonstration directly perceived; Cable conduction analyzing and diagnosing module 306, for revised cable conduction frequency spectrum FC is carried out and typical curve contrast, is found out abnormal frequency; Port conduction analyzing and diagnosing module 307, for revised port conduction frequency spectrum FD is carried out and typical curve contrast on the one hand, is found out abnormal frequency; Carry out on the other hand and CE106 ultimate value curve comparison, find out the frequency that exceeds standard.
To describe the function of each module realization in detail below:
(1) spectral coefficient correcting module 301
Spectral coefficient correcting module 301 first aspects adopt the first correction to be related to CFA (a)=FA (a)+K
e (antenna)+ L
f (RF cable)the first radiation-emitting frequency spectrum FA (a) to input revises, and obtains the first correction radiation-emitting frequency spectrum CFA (a); K
e (antenna)represent the antenna damping coefficient of receiving antenna 11; L
f (RF cable)represent the RF cable loss of receiving antenna 11;
Spectral coefficient correcting module 301 second aspects adopt the second correction to be related to CFA (b)=FA (b)+K
e (antenna)+ L
f (RF cable)the second radiation-emitting frequency spectrum FA (b) to input revises, and obtains the second correction radiation-emitting frequency spectrum CFA (b); K
e (antenna)represent the antenna damping coefficient of receiving antenna 11; L
f (RF cable)represent the RF cable loss of receiving antenna 11;
Spectral coefficient correcting module 301 third aspect adopt the 3rd correction to be related to CFB=FB+K
e (antenna)+ L
f(RF cable)environment electromagnetics frequency spectrum FB to input revises, and obtains revising environment electromagnetic spectrum CFB; K
e (antenna)represent the antenna damping coefficient of receiving antenna 11; L
f (RF cable)represent the RF cable loss of receiving antenna 11;
Spectral coefficient correcting module 301 fourth aspects adopt the 4th correction to be related to CFC=FC+K
e (probe)+ L
f (probe cable)cable conduction frequency spectrum FC to input revises, and obtains revising cable conduction frequency spectrum CFC; K
e (probe)represent the attenuation coefficient of current probe 12; L
f (probe cable)represent the probe cable waste of current probe 12;
Spectral coefficient correcting module 301 the 5th aspect adopts the 5th correction to be related to CFD=FD+L
f (port cable)port conduction frequency spectrum FD to input revises, and obtains revising port conduction frequency spectrum CFD; L
f (port cable)represent the port cable waste being connected between test specimen and spectrum measurement instrument 20.
(2) radiation frequency spectrum noise elimination module 302
Radiation frequency spectrum noise elimination module 302 adopts the first correction radiation-emitting frequency spectrum CFA (a) that denoising algorithm is exported spectral coefficient correcting module 301 to carry out denoising Processing on the one hand, obtains the first de-noising radiation-emitting frequency spectrum FA2 (a) output;
Radiation frequency spectrum noise elimination module 302 adopts the second correction radiation-emitting frequency spectrum CFA (b) that denoising algorithm is exported spectral coefficient correcting module 301 to carry out denoising Processing on the other hand, obtains the second de-noising radiation-emitting frequency spectrum FA2 (b) output.
In the present invention, denoising algorithm is that the first correction radiation-emitting frequency spectrum CFA (a) is carried out to maximum value traversal, frequency before and after amplitude is greater than more than minimal value 5dB is defaulted as electromagnetic signal, and other frequencies are defaulted as to the end of making an uproar, and adds up the maximum amplitude at the end of making an uproar.If make an uproar, the maximum amplitude at the end is less than 24dB μ V/m, and without carrying out denoising Processing, radiation-emitting frequency spectrum CFA (a) is FA2 (A) output; If make an uproar, the maximum amplitude at the end is more than or equal to 24dB μ V/m, first the electromagnetic signal screening in CFA (a) is amplified to processing, signal amplitude all increases 20dB, then the amplitude of all frequencies of whole frequency spectrum is all reduced to 20dB, can obtain radiation-emitting frequency spectrum FA2 (A) output after de-noising.
In the present invention, denoising algorithm is that the second correction radiation-emitting frequency spectrum CFA (b) is carried out to maximum value traversal, frequency before and after amplitude is greater than more than minimal value 5dB is defaulted as electromagnetic signal, and other frequencies are defaulted as to the end of making an uproar, and adds up the maximum amplitude at the end of making an uproar.If make an uproar, the maximum amplitude at the end is less than 24dB μ V/m, and without carrying out denoising Processing, radiation-emitting frequency spectrum CFA (b) is FA2 (b) output; If make an uproar, the maximum amplitude at the end is more than or equal to 24dB μ V/m, first the electromagnetic signal screening in CFA (b) is amplified to processing, signal amplitude all increases 20dB, then the amplitude of all frequencies of whole frequency spectrum is all reduced to 20dB, can obtain radiation-emitting frequency spectrum FA2 (b) output after de-noising.
(3) radiation frequency spectrum filtration module 303
The first de-noising radiation-emitting frequency spectrum FA2 (a) that radiation frequency spectrum filtration module 303 first aspects are exported radiation frequency spectrum noise elimination module module 302 carries out maximum value traversal, and the frequency before and after amplitude is greater than more than minimal value 5dB is defaulted as electromagnetic signal FA2 (a)
sA;
The second de-noising radiation-emitting frequency spectrum FA2 (b) that radiation frequency spectrum filtration module 303 second aspects are exported radiation frequency spectrum noise elimination module module 302 carries out maximum value traversal, and the frequency before and after amplitude is greater than more than minimal value 5dB is defaulted as electromagnetic signal FA2 (b)
sA;
Radiation frequency spectrum filtration module 303 third aspect are to FA2 (a)
sAwith FA2 (b)
sAcarry out same frequency signal fusing, if exist with frequency signal, this frequency amplitude in FA2 (b) is carried out to linear interpolation processing based on front and back minimal value, obtain filtering radiation-emitting frequency spectrum FA3 output;
Radiation frequency spectrum filtration module 303 fourth aspects are to FA2 (a)
sAwith FA2 (b)
sAcarry out same frequency signal fusing, if there is not same frequency signal, export FA2 (b) as filtering radiation-emitting frequency spectrum FA3.
(4) Emanations Analysis diagnostic module 304
The filtering radiation-emitting frequency spectrum FA3 that Emanations Analysis diagnostic module 304 is exported radiation frequency spectrum filtration module 303 carries out Emanations Analysis diagnosis, judges that whether the radiation-emitting characteristic of test specimen is qualified or whether abnormal, and concrete steps are:
304-1 step: want summation approach according to RE102 test event in GJB151A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility require " and GJB152A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility test ", obtain RE102 ultimate value curve;
304-2 step: filtering radiation-emitting frequency spectrum FA3 and RE102 ultimate value curve that radiation frequency spectrum filtration module 303 is exported are compared, the radiation-emitting that the extracts test specimen frequency that exceeds standard.The frequency that in FA3, amplitude is greater than RE102 ultimate value curve is the frequency that exceeds standard;
304-3 step: according to whether existing the frequency that exceeds standard to judge that whether the radiation-emitting characteristic of test specimen is qualified, if there is the frequency that exceeds standard, the radiation-emitting characteristic of test specimen does not meet the relevant regulations in GJB151A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility require ", is defective; Otherwise, be qualified;
304-4 step: the filtering radiation-emitting frequency spectrum FA3 that radiation frequency spectrum filtration module 303 is exported and quick diagnosis are compared the typical curve of the information formation in database and compared, and extract the abnormal frequency of radiation-emitting of test specimen; The frequency that in FA3, amplitude and typical curve differ more than 2dB is abnormal frequency;
304-5 step: according to whether existing abnormal frequency to judge that whether the radiation-emitting characteristic of test specimen is abnormal, if there is abnormal frequency, be abnormal; Otherwise, be normal.When the radiation-emitting characteristic of test specimen occurs when abnormal, judge intensity of anomaly according to difference amplitude, if abnormal frequency amplitude and typical curve differ 2dB～4dB in FA3, be mile abnormality; If in FA3, abnormal frequency amplitude and typical curve differ 4dB～8dB, are that moderate is abnormal; If more than in FA3, abnormal frequency amplitude and typical curve differ 8dB, be that severe is abnormal.
(5) the dynamic display module 305 of environment electromagnetics frequency spectrum
The dynamic display module 305 of environment electromagnetics frequency spectrum, by interface as shown in Figure 2 A, carries out demonstration, EMI test, analyzing and diagnosing condition setting, the setting of electromagnetic environment testing conditions of frequency spectrum graphics.
The demonstration of frequency spectrum graphics is mainly that pin correction environment electromagnetic spectrum CFB shows, and constantly refreshes, on computer screen, carries out in real time test result demonstration according to the difference of EMI test, analyzing and diagnosing condition setting, the setting of electromagnetic environment testing conditions.
EMI(Electro-Magnetic Interference, electromagnetic interference (EMI)) test: selection, the test pattern that includes test specimen selected, test parameter setting; Described test pattern selects point three classes to carry out, i.e. radiation test (surveying FA (a), FA (b), FB, FC, FD), power lead conduction test (surveying FC) and antenna terminal conduction test (surveying FD); Described test parameter setting comprises the setting to initial frequency, termination frequency, three kinds of parameters of decay; Only select by test specimen is set for the standard testing that meets army's mark demand, test pattern selection and test parameter setting are not chosen.
Analyzing and diagnosing condition setting: include test curve selection and diagnostic mode and select; Described test curve selects to refer to the lines that generation spectrogram is used; Whether described diagnostic mode is selected at present only for meeting army's target analysis and mark different interference anomaly analysis from army.
The setting of electromagnetic environment testing conditions realizes by test parameter setting.Include initial frequency, stop frequency, decay, RBW(and analyze bandwidth), VBW(shows bandwidth) setting of parameter.
RBW represents the minimum frequency range difference that the signal of two different frequencies can clearly be distinguished, the signal frequency range of two different frequencies is as the RBW lower than spectrum analyzer, now this two signal is by overlapping, indistinguishable, lower RBW no doubt contributes to resolution and the measurement of different frequency signals, low RBW is by the signal composition of filtering upper frequency, while causing signal to show, produce distortion, the RBW of distortion value and setting is closely related, higher RBW no doubt contributes to the detecting of broadband signal, to increase noise bottom value (Noise Floor), reduce and measure sensitivity, easily produce obstruction for the low intensive signal of detecting, therefore suitable RBW width is the vital point that correctly uses spectrum analyzer.VBW, video bandwidth, the precision of expression test, less precision is higher, as VBW is made as to 100KHz, represents that getting a sample every 100KHz tests its level, therefore can see that VBW arranges less its test curve more smooth.
(6) cable conduction analyzing and diagnosing module 306
The correction cable conduction frequency spectrum CFC that cable conduction analyzing and diagnosing module 306 is exported spectral coefficient correcting module 301 carries out cable conduction analyzing and diagnosing, judges that whether the cable transport properties of test specimen is abnormal, and concrete steps are:
306-1 step: correction cable conduction frequency spectrum CFC and the quick diagnosis that spectral coefficient correcting module 301 is exported compared the typical curve of the information formation in database and compared, and extracts the cable conduction abnormalities frequency of test specimen.The frequency that in CFC, amplitude and typical curve differ more than 2dB is abnormal frequency;
306-2 step: according to whether existing abnormal frequency to judge that whether the cable transport properties of test specimen is abnormal, if there is abnormal frequency, be abnormal; Otherwise, be normal.When the cable transport properties of test specimen occurs when abnormal, judge intensity of anomaly according to difference amplitude, if abnormal frequency amplitude and typical curve differ 2dB～4dB in CFC, be mile abnormality; If in CFC, abnormal frequency amplitude and typical curve differ 4dB～8dB, are that moderate is abnormal; If more than in CFC, abnormal frequency amplitude and typical curve differ 8dB, be that severe is abnormal.
(7) port conduction analyzing and diagnosing module 307
The correction port conduction frequency spectrum CFD that port conduction analyzing and diagnosing module 307 is exported spectral coefficient correcting module 301 carries out port conduction analyzing and diagnosing, judges that whether the port transport properties of test specimen is qualified or whether abnormal, and concrete steps are:
307-1 step: want summation approach according to CE106 test event in GJB151A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility require " and GJB152A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility test ", obtain CE106 ultimate value curve;
307-2 step: correction port conduction frequency spectrum CFD and CE106 ultimate value curve that spectral coefficient correcting module 301 is exported are compared, and the port that extracts test specimen conducts the frequency that exceeds standard; The frequency that in CFD, amplitude is greater than CE106 ultimate value curve is the frequency that exceeds standard;
307-3 step: according to whether existing the frequency that exceeds standard to judge that whether the port transport properties of test specimen is qualified, if there is the frequency that exceeds standard, the port transport properties of test specimen does not meet the relevant regulations in GJB151A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility require ", is defective; Otherwise, be qualified;
307-4 step: correction port conduction frequency spectrum CFD and the quick diagnosis that spectral coefficient correcting module 301 is exported compared the typical curve of the information formation in database and compared, and extracts the port conduction abnormalities frequency of test specimen.The frequency that in CFD, amplitude and typical curve differ more than 2dB is abnormal frequency;
307-5 step: according to whether existing abnormal frequency to judge that whether the port transport properties of test specimen is abnormal, if there is abnormal frequency, be abnormal; Otherwise, be normal.When the port transport properties of test specimen occurs when abnormal, judge intensity of anomaly according to difference amplitude, if abnormal frequency amplitude and typical curve differ 2dB～4dB in CFD, be mile abnormality; If in CFD, abnormal frequency amplitude and typical curve differ 4dB～8dB, are that moderate is abnormal; If more than in CFD, abnormal frequency amplitude and typical curve differ 8dB, be that severe is abnormal.
In the present invention, computing machine 30 is the control core of system and carrier and the platform of software operation operation.Operating personnel can propose Detection task by computer interactive interface (as shown in Figure 2 A), and detected parameters is set, and obtain test result and carry out analyzing and diagnosing.Computing machine 30, by transfer control signal and data message between USB transmission line and spectrum measurement instrument 20, is realized the control to spectrum measurement instrument 20, obtains frequency spectrum data with for further analysis from spectrum measurement instrument 20 simultaneously.Test data is stored in computing machine 30, conveniently calls.
Native system is integrated together spectrum measurement instrument 20 and computing machine 30, and volume is little, easy to carry, and has stronger environmental suitability.
Electromagnetic compatibility is tested fast diagnosis unit and is adopted virtual instrument development platform Labview 8.5 to write.The hardware of system is carried out to Control & data acquisition, use specific algorithm to carry out interpretation and computing to the data of collecting, obtain satisfactory electromagnetic spectrum; The electromagnetic spectrum of test specimen and the typical curve that corresponding ultimate value curve or quick diagnosis are compared the Information generation in database are compared, judge the current electromagnetic compatibility characteristic of test specimen; In addition, electromagnetic compatibility is tested fast diagnosis unit and can also effectively be managed test data.
In the present invention, main USB transmission line and the spectrum measurement instrument 20 of adopting of computing machine 30 carries out the transmission of control command and the collection of external data.After program starts, electromagnetic compatibility is tested fast diagnosis unit and is first sent a self-checking command to spectrum measurement instrument 20, receive self-checking command after spectrum measurement instrument 20 return to specific code.If electromagnetic compatibility is tested fast diagnosis unit and is not received this code, show that malunion is normal, electromagnetic compatibility is tested fast diagnosis unit and is reported an error, and need to carry out manual intervention.If electromagnetic compatibility is tested diagnosis unit and receives the code of response fast, show that spectrum measurement instrument 20 is working properly, proceed test.According to testing requirements by specific parameter read-in spectrum measurement instrument 20, spectrum measurement instrument 20 is processed rear feedback data information, judge whether to need to continue to control spectrum measurement instrument 20, if need to, continue to write control parameter to spectrum measurement instrument 20, continue test by above-mentioned steps, if do not needed, end test.
In the present invention, control the carrying out of test by computer interactive interface (as shown in Figure 2 A), obtain spectrum information.Under test interface, select test measurement antenna or current probe used and test RF cable used, test-types is set.In the time testing, according to the testing apparatus of selecting, the data that spectrum measurement instrument 20 is obtained are carried out corresponding correction automatically.After test starts, the detecting informations such as typing test specimen, spectrum measurement instrument 20 running parameters are set, comprise initial termination frequency, datum, decay, RBW, sweep time etc., spectrum measurement instrument 20 is started working, electromagnetic compatibility is tested fast diagnosis unit image data and is revised demonstration, and result is saved in computing machine 30.By test, can obtain radiation-emitting frequency spectrum, cable conduction frequency spectrum, port conduction frequency spectrum and the environment electromagnetics spectrum information of test specimen.
In the time carrying out radiation emission test, the end of making an uproar, may be higher.The test specimen radiation-emitting frequency spectrum obtaining is carried out to denoising Processing, isolated radiation-emitting signal from the end of making an uproar.
In the time carrying out radiation emission test, in environment, may there is certain undesired signal, the radiation-emitting frequency spectrum of the test specimen obtaining is carried out to filtering processing, the radiation-emitting signal of test specimen is extracted from ambient signal.
Electromagnetic compatibility is tested fast the typical curve that the emission spectrum of the test specimen of acquisition and corresponding ultimate value curve or quick diagnosis compared the Information generation in database by diagnosis unit and is compared, and the electromagnetic compatibility characteristic of test specimen is diagnosed.Under analyzing and diagnosing interface, first select the test figure that need to compare, and select diagnosis scheme.In the time selecting to compare with corresponding ultimate value curve, in statistics emission spectrum, amplitude is greater than the frequency of ultimate value, judges whether the electromagnetic compatibility characteristic of test specimen exceeds standard.In the time that the typical curve of selecting to compare the Information generation in database with quick diagnosis compares, add up the frequency that variable quantity in two groups of data exceedes setting value, judge whether the electromagnetic compatibility characteristic of test specimen occurs extremely.
embodiment 1
Hardware device receiving antenna 11, current probe 12, spectrum measurement instrument 20 and computing machine 30 are connected.
Use receiving antenna 11 can obtain the radiation-emitting frequency spectrum of test specimen.In use, system is carried out twice test automatically according to arranging.For the first time, obtain the radiation-emitting frequency spectrum under test specimen outage condition.As shown in Figure 3A, be the radiation-emitting frequency spectrum under test specimen outage condition.As can be seen from the figure, there is a larger ambient signal in 23MHz left and right.For the second time, obtain the radiation-emitting frequency spectrum under test specimen compressor start up condition.As shown in Figure 3 B, be the radiation-emitting frequency spectrum of certain signal generator under compressor start up condition.As can be seen from the figure, frequency spectrum had both comprised that the work of signal generator transmits, and also comprised ambient signal.System, by filtering algorithm, generates the filtered radiation-emitting frequency spectrum of test specimen automatically.As shown in Figure 3 C, be filtered test specimen radiation-emitting frequency spectrum.As can be seen from the figure, ambient signal is by filtering.Use current probe 12, can obtain the cable conduction frequency spectrum of test specimen.By direct-connected mode, can obtain the port conduction frequency spectrum of test specimen.
Obtain after the emission spectrum of test specimen, and then the typical curve that can compare the Information generation in database with corresponding ultimate value curve or quick diagnosis compares analysis, its electromagnetic compatibility characteristic is diagnosed.As shown in Figure 4, the port conduction frequency spectrum of a certain civil radio obtaining and corresponding ultimate value curve (choose here CE106 curve as ultimate value curve) in GJB151A-97 are compared, diagnosis is found, its conduction transmitting value of not going beyond the limit of standard, and Electromagnetic Launching characteristic is qualified.As shown in Figure 5, the typical curve that the radiation-emitting frequency spectrum to a certain civil radio obtaining and quick diagnosis are compared the Information generation in database compares, diagnosis discovery, and its humorous intensity of wave becomes large, and Electromagnetic Launching characteristic has occurred extremely.
Using receiving antenna 11, can carry out real-time detection to electromagnetic environment, as shown in Figure 6, is the environment electromagnetics frequency spectrum under a certain moment background.
Claims (7)
1. have the quick test diagnosis system of electromagnetic compatibility that quantizes electromagnetic interference (EMI), the hardware device that this system comprises has receiving antenna (11), current probe (12), spectrum measurement instrument (20) and computing machine (30); It is characterized in that: in described computing machine (30), adopt Labview Programming with Pascal Language to obtain electromagnetic compatibility and test fast diagnosis unit; Described electromagnetic compatibility is tested fast diagnosis unit and is included spectral coefficient correcting module (301), radiation frequency spectrum noise elimination module (302), radiation frequency spectrum filtration module (303), Emanations Analysis diagnostic module (304), the dynamic display module of environment electromagnetics frequency spectrum (305), cable conduction analyzing and diagnosing module (306), port conduction analyzing and diagnosing module (307);
Spectral coefficient correcting module (301) first aspect adopts the first correction to be related to CFA (a)=FA (a)+K
e (antenna)+ L
f (RF cable)the first radiation-emitting frequency spectrum FA (a) to input revises, and obtains the first correction radiation-emitting frequency spectrum CFA (a); K
e (antenna)represent the antenna damping coefficient of receiving antenna (11); L
f (RF cable)represent the RF cable loss of receiving antenna (11);
Spectral coefficient correcting module (301) second aspect adopts the second correction to be related to CFA (b)=FA (b)+K
e (antenna)+ L
f (RF cable)the second radiation-emitting frequency spectrum FA (b) to input revises, and obtains the second correction radiation-emitting frequency spectrum CFA (b);
Spectral coefficient correcting module (301) third aspect adopts the 3rd correction to be related to CFB=FB+K
e (antenna)+ L
f(RF cable)environment electromagnetics frequency spectrum FB to input revises, and obtains revising environment electromagnetic spectrum CFB;
Spectral coefficient correcting module (301) fourth aspect adopts the 4th correction to be related to CFC=FC+K
e(probe)+ L
f (probe cable)cable conduction frequency spectrum FC to input revises, and obtains revising cable conduction frequency spectrum CFC;
Spectral coefficient correcting module (301) the 5th aspect adopts the 5th correction to be related to CFD=FD+L
f (port cable)port conduction frequency spectrum FD to input revises, and obtains revising port conduction frequency spectrum CFD; L
f (port cable)represent the port cable waste being connected between test specimen and spectrum measurement instrument (20);
Radiation frequency spectrum noise elimination module (302) adopts denoising algorithm to carry out denoising Processing to the first described correction radiation-emitting frequency spectrum CFA (a) on the one hand, obtains the first de-noising radiation-emitting frequency spectrum FA2 (a) output;
Radiation frequency spectrum noise elimination module (302) adopts denoising algorithm to carry out denoising Processing to the second described correction radiation-emitting frequency spectrum CFA (b) on the other hand, obtains the second de-noising radiation-emitting frequency spectrum FA2 (b) output;
Radiation frequency spectrum filtration module (303) first aspect is carried out maximum value traversal to the first described de-noising radiation-emitting frequency spectrum FA2 (a), and the frequency before and after amplitude is greater than more than minimal value 5dB is defaulted as electromagnetic signal FA2 (a)
sA;
Radiation frequency spectrum filtration module (303) second aspect is carried out maximum value traversal to the second described de-noising radiation-emitting frequency spectrum FA2 (b), and the frequency before and after amplitude is greater than more than minimal value 5dB is defaulted as electromagnetic signal FA2 (b)
sA;
Radiation frequency spectrum filtration module (303) third aspect is to FA2 (a)
sAwith FA2 (b)
sAcarry out same frequency signal fusing, if exist with frequency signal, this frequency amplitude in FA2 (b) is carried out to linear interpolation processing based on front and back minimal value, obtain filtering radiation-emitting frequency spectrum FA3 output;
Radiation frequency spectrum filtration module (303) fourth aspect is to FA2 (a)
sAwith FA2 (b)
sAcarry out same frequency signal fusing, if there is not same frequency signal, export FA2 (b) as filtering radiation-emitting frequency spectrum FA3;
Emanations Analysis diagnostic module (304) carries out Emanations Analysis diagnosis to described filtering radiation-emitting frequency spectrum FA3, judges that whether the radiation-emitting characteristic of test specimen is qualified or whether abnormal, and concrete steps are:
304-1 step: want summation approach according to RE102 test event in GJB151A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility require " and GJB152A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility test ", obtain RE102 ultimate value curve;
304-2 step: described filtering radiation-emitting frequency spectrum FA3 and RE102 ultimate value curve are compared, the radiation-emitting that the extracts test specimen frequency that exceeds standard; The frequency that in FA3, amplitude is greater than RE102 ultimate value curve is the frequency that exceeds standard;
304-3 step: according to whether existing the frequency that exceeds standard to judge that whether the radiation-emitting characteristic of test specimen is qualified, if there is the frequency that exceeds standard, the radiation-emitting characteristic of test specimen does not meet the relevant regulations in GJB151A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility require ", is defective; Otherwise, be qualified;
304-4 step: described filtering radiation-emitting frequency spectrum FA3 is compared with the typical curve that quick diagnosis is compared the information formation in database, extract the abnormal frequency of radiation-emitting of test specimen; The frequency that in FA3, amplitude and typical curve differ more than 2dB is abnormal frequency;
304-5 step: according to whether existing abnormal frequency to judge that whether the radiation-emitting characteristic of test specimen is abnormal, if there is abnormal frequency, be abnormal; Otherwise, be normal; When the radiation-emitting characteristic of test specimen occurs when abnormal, judge intensity of anomaly according to difference amplitude, if abnormal frequency amplitude and typical curve differ 2dB～4dB in FA3, be mile abnormality; If in FA3, abnormal frequency amplitude and typical curve differ 4dB～8dB, are that moderate is abnormal; If more than in FA3, abnormal frequency amplitude and typical curve differ 8dB, be that severe is abnormal;
The dynamic display module of environment electromagnetics frequency spectrum (305) is used for showing on the one hand revises environment electromagnetic spectrum CFB, constantly refreshes, on computer screen, carries out in real time test result demonstration on the other hand according to the difference of EMI test, analyzing and diagnosing condition setting, the setting of electromagnetic environment testing conditions;
Cable conduction analyzing and diagnosing module (306) is carried out cable conduction analyzing and diagnosing to described correction cable conduction frequency spectrum CFC, judges that whether the cable transport properties of test specimen is abnormal, and concrete steps are:
306-1 step: correction cable conduction frequency spectrum CFC and the quick diagnosis that spectral coefficient correcting module 301 is exported compared the typical curve of the information formation in database and compared, and extracts the cable conduction abnormalities frequency of test specimen; The frequency that in CFC, amplitude and typical curve differ more than 2dB is abnormal frequency;
306-2 step: according to whether existing abnormal frequency to judge that whether the cable transport properties of test specimen is abnormal, if there is abnormal frequency, be abnormal; Otherwise, be normal; When the cable transport properties of test specimen occurs when abnormal, judge intensity of anomaly according to difference amplitude, if abnormal frequency amplitude and typical curve differ 2dB～4dB in CFC, be mile abnormality; If in CFC, abnormal frequency amplitude and typical curve differ 4dB～8dB, are that moderate is abnormal; If more than in CFC, abnormal frequency amplitude and typical curve differ 8dB, be that severe is abnormal;
Port conduction analyzing and diagnosing module (307) is carried out port conduction analyzing and diagnosing to described correction port conduction frequency spectrum CFD, judges that whether the port transport properties of test specimen is qualified or whether abnormal, and concrete steps are:
307-1 step: want summation approach according to CE106 test event in GJB151A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility require " and GJB152A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility test ", obtain CE106 ultimate value curve;
307-2 step: correction port conduction frequency spectrum CFD and CE106 ultimate value curve that spectral coefficient correcting module 301 is exported are compared, and the port that extracts test specimen conducts the frequency that exceeds standard; The frequency that in CFD, amplitude is greater than CE106 ultimate value curve is the frequency that exceeds standard;
307-3 step: according to whether existing the frequency that exceeds standard to judge that whether the port transport properties of test specimen is qualified, if there is the frequency that exceeds standard, the port transport properties of test specimen does not meet the relevant regulations in GJB151A-1997 " military equipment equipment and subsystem Electromagnetic Launching and susceptibility require ", is defective; Otherwise, be qualified;
307-4 step: correction port conduction frequency spectrum CFD and the quick diagnosis that spectral coefficient correcting module 301 is exported compared the typical curve of the information formation in database and compared, and extracts the port conduction abnormalities frequency of test specimen; The frequency that in CFD, amplitude and typical curve differ more than 2dB is abnormal frequency;
307-5 step: according to whether existing abnormal frequency to judge that whether the port transport properties of test specimen is abnormal, if there is abnormal frequency, be abnormal; Otherwise, be normal; When the port transport properties of test specimen occurs when abnormal, judge intensity of anomaly according to difference amplitude, if abnormal frequency amplitude and typical curve differ 2dB～4dB in CFD, be mile abnormality; If in CFD, abnormal frequency amplitude and typical curve differ 4dB～8dB, are that moderate is abnormal; If more than in CFD, abnormal frequency amplitude and typical curve differ 8dB, be that severe is abnormal.
2. the quick test diagnosis system of electromagnetic compatibility with quantification electromagnetic interference (EMI) according to claim 1, it is characterized in that: denoising algorithm is that the first correction radiation-emitting frequency spectrum CFA (a) is carried out to maximum value traversal, frequency before and after amplitude is greater than more than minimal value 5dB is defaulted as electromagnetic signal, other frequencies are defaulted as to the end of making an uproar, add up the maximum amplitude at the end of making an uproar; If make an uproar, the maximum amplitude at the end is less than 24dB μ V/m, and without carrying out denoising Processing, radiation-emitting frequency spectrum CFA (a) is FA2 (a) output; If make an uproar, the maximum amplitude at the end is more than or equal to 24dB μ V/m, first the electromagnetic signal screening in CFA (a) is amplified to processing, signal amplitude all increases 20dB, then the amplitude of all frequencies of whole frequency spectrum is all reduced to 20dB, can obtain radiation-emitting frequency spectrum FA2 (a) output after de-noising.
3. the quick test diagnosis system of electromagnetic compatibility with quantification electromagnetic interference (EMI) according to claim 1, it is characterized in that: denoising algorithm is that the second correction radiation-emitting frequency spectrum CFA (b) is carried out to maximum value traversal, frequency before and after amplitude is greater than more than minimal value 5dB is defaulted as electromagnetic signal, other frequencies are defaulted as to the end of making an uproar, add up the maximum amplitude at the end of making an uproar; If make an uproar, the maximum amplitude at the end is less than 24dB μ V/m, and without carrying out denoising Processing, radiation-emitting frequency spectrum CFA (b) is FA2 (b) output; If make an uproar, the maximum amplitude at the end is more than or equal to 24dB μ V/m, first the electromagnetic signal screening in CFA (b) is amplified to processing, signal amplitude all increases 20dB, then the amplitude of all frequencies of whole frequency spectrum is all reduced to 20dB, can obtain radiation-emitting frequency spectrum FA2 (b) output after de-noising.
4. the quick test diagnosis system of electromagnetic compatibility with quantification electromagnetic interference (EMI) according to claim 1, is characterized in that: the annexation between receiving antenna (11), current probe (12), spectrum measurement instrument (20) and computing machine (30) in hardware device is; Receiving antenna (11) is connected on spectrum measurement instrument (20) by RF cable, the chuck end of current probe (12) is clipped on the power cable of test specimen, the output terminal of current probe (12) is connected on spectrum measurement instrument (20) by probe cable, it is upper that test specimen is connected to spectrum measurement instrument (20) by port cable, and spectrum measurement instrument (20) is connected by data line with computing machine (30).
5. the quick test diagnosis system of electromagnetic compatibility with quantification electromagnetic interference (EMI) according to claim 1, is characterized in that: it is the hand-held spectrum analyzer of 9kHz～43GHz that described spectrum measurement instrument (20) is selected survey frequency scope.
6. the quick test diagnosis system of electromagnetic compatibility with quantification electromagnetic interference (EMI) according to claim 1, is characterized in that: described receiving antenna (11) is selected omnidirectional antenna; In described omnidirectional antenna, include the active telescopic antenna of SAS-550-1, survey frequency scope is 10kHz～60MHz; SAS-542 biconical antenna, survey frequency scope is 20MHz～330MHz; SAS-570 double-ridged horn antenna, survey frequency scope is 170MHz～3GHz; SAS-571 double-ridged horn antenna, survey frequency scope is 700MHz～18GHz.
7. the quick test diagnosis system of electromagnetic compatibility with quantification electromagnetic interference (EMI) according to claim 1, is characterized in that: the survey frequency scope of described current probe (12) is 10kHz～100MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210217966.1A CN102749539B (en) | 2012-06-27 | 2012-06-27 | Fast electromagnetic compatibility test and diagnosis system with quantization electromagnetic interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210217966.1A CN102749539B (en) | 2012-06-27 | 2012-06-27 | Fast electromagnetic compatibility test and diagnosis system with quantization electromagnetic interference |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102749539A CN102749539A (en) | 2012-10-24 |
| CN102749539B true CN102749539B (en) | 2014-06-18 |
Family
ID=47029889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210217966.1A Active CN102749539B (en) | 2012-06-27 | 2012-06-27 | Fast electromagnetic compatibility test and diagnosis system with quantization electromagnetic interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102749539B (en) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048561B (en) * | 2012-12-11 | 2015-04-08 | 上海卫星工程研究所 | EMC (Electro Magnetic Compatibility) test method of deep space aircraft coupling |
| CN103063962B (en) * | 2012-12-31 | 2015-06-24 | 北京航空航天大学 | Electrical appliance radiation electromagnetic compatibility obtaining method based on living area exposure limiting value |
| CN103076521B (en) * | 2012-12-31 | 2015-02-11 | 北京航空航天大学 | Equipment layout regulating method on basis of exposure measurement on microwave frequency band radiation |
| CN103063964B (en) * | 2012-12-31 | 2015-05-20 | 北京航空航天大学 | Device layout adjustment method based on ultrashort wave frequency range radiation exposure measurement |
| CN103454524B (en) * | 2013-08-22 | 2015-10-07 | 北京航空航天大学 | A kind of emc testing system based on Geographic Information System and programmable attenuator |
| CN103760426B (en) * | 2013-11-28 | 2016-06-08 | 电子信息系统复杂电磁环境效应国家重点实验室 | A kind of complex electromagnetic environment measure based on vector |
| CN105891620A (en) * | 2014-11-17 | 2016-08-24 | 机械工业仪器仪表综合技术经济研究所 | Test system used for testing CMC chip electromagnetic compatibility radiation characteristic |
| CN105044520B (en) * | 2015-08-06 | 2018-06-19 | 西安电子科技大学 | The on-the-spot test method and device of a kind of electronic equipment Electromagnetic Launching characteristic |
| CN105223435B (en) * | 2015-08-31 | 2018-10-09 | 北京航天长征飞行器研究所 | A kind of missile-borne anti-interference antenna Auto-Test System and test method |
| CN105717372B (en) * | 2016-01-05 | 2019-03-29 | 中车南京浦镇车辆有限公司 | A kind of train inside magnetostatic field is tested and running state analysis device and analysis method |
| CN105790863B (en) * | 2016-03-02 | 2017-04-26 | 北京盈想东方科技股份有限公司 | Single-channel frequency spectrum monitoring device |
| CN106053982B (en) * | 2016-05-25 | 2019-02-05 | 北京航空航天大学 | A kind of electromagnetic compatibility analysis method of radio-frequency module backboard |
| CN107543978B (en) * | 2016-06-23 | 2021-08-24 | 是德科技股份有限公司 | System and method for calibrating radiation channel matrix in MIMO via OTA radiation test system |
| CN106526380B (en) * | 2016-11-18 | 2018-03-16 | 北京航空航天大学 | Electromagnetic Launching key element testing and analysis system |
| CN106526390A (en) * | 2016-12-23 | 2017-03-22 | 安徽华东光电技术研究所 | Electronic compatible EMC conduction simple test method |
| CN106932672B (en) * | 2017-03-06 | 2019-06-07 | 吴伟 | A kind of appraisal procedure of radiation of equipment interference |
| CN107121602B (en) * | 2017-03-21 | 2020-03-03 | 广州小鹏汽车科技有限公司 | Interference source searching method for vehicle-mounted central control system |
| CN107478920A (en) * | 2017-05-23 | 2017-12-15 | 东风特汽（十堰）专用车有限公司 | New-energy automobile radiation disturbance risk assessment easily-testing system |
| CN109839553A (en) * | 2017-11-26 | 2019-06-04 | 长沙闽壹湖电子科技有限责任公司 | A kind of EMC Design of Automatic Test System based on virtual instrument |
| CN108152622B (en) * | 2017-12-18 | 2020-06-02 | 中国北方车辆研究所 | Interference degree quantitative evaluation method for vehicle-mounted communication system in wave-absorbing darkroom |
| CN115291022A (en) * | 2018-01-06 | 2022-11-04 | 吴伟 | Quality control method for batch products |
| CN108667506B (en) * | 2018-04-26 | 2020-11-20 | 北京空间飞行器总体设计部 | System and method for testing influence of satellite electric propulsion system on communication signal modulation |
| CN109507488B (en) * | 2019-01-21 | 2021-10-01 | 武汉裕量信息科技有限公司 | Electromagnetic anti-interference performance test system |
| CN110275078B (en) * | 2019-07-16 | 2021-10-15 | 国网江苏省电力有限公司电力科学研究院 | Method and system for distinguishing secondary cable ground loop disturbance of transformer substation and storage medium |
| CN110646668B (en) * | 2019-08-15 | 2024-02-02 | 威凯检测技术有限公司 | Automobile EMI diagnosis device and diagnosis method adopting line array probe |
| CN111327378A (en) * | 2019-11-19 | 2020-06-23 | 北京空间技术研制试验中心 | EMC analysis method for spacecraft rendezvous and take-around flight |
| CN111521958B (en) * | 2020-04-22 | 2022-08-09 | 北京森馥科技股份有限公司 | Low-frequency magnetic field measuring method, device, electronic equipment and storage medium |
| CN112881845B (en) * | 2021-01-26 | 2022-11-04 | 浙江亚太机电股份有限公司 | Device and method for measuring conduction emission current of ECU signal wire |
| CN114839467B (en) * | 2022-05-27 | 2023-12-22 | 苏州浪潮智能科技有限公司 | Test method and device for high-efficiency positioning server conduction super-mark cable |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4224858A1 (en) * | 1992-07-28 | 1994-02-03 | Gunter Dipl Ing Langer | Evaluating tolerance of digital circuits to EM interference - using interference generator with variable pulsed output characteristic to test static and dynamic response of digital circuitry |
| CN101701986A (en) * | 2009-10-27 | 2010-05-05 | 中国舰船研究设计中心 | System for pre-testing and diagnosing electro magnetic interference of electronic equipment and method thereof |
| CN101750545A (en) * | 2009-12-15 | 2010-06-23 | 北京空间飞行器总体设计部 | Electromagnetic compatibility test method for electric propulsion system |
| CN101873144A (en) * | 2010-05-28 | 2010-10-27 | 北京航空航天大学 | Electromagnetic compatibility optimizing method for receiver in targeted frequency ranges |
-
2012
- 2012-06-27 CN CN201210217966.1A patent/CN102749539B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4224858A1 (en) * | 1992-07-28 | 1994-02-03 | Gunter Dipl Ing Langer | Evaluating tolerance of digital circuits to EM interference - using interference generator with variable pulsed output characteristic to test static and dynamic response of digital circuitry |
| CN101701986A (en) * | 2009-10-27 | 2010-05-05 | 中国舰船研究设计中心 | System for pre-testing and diagnosing electro magnetic interference of electronic equipment and method thereof |
| CN101750545A (en) * | 2009-12-15 | 2010-06-23 | 北京空间飞行器总体设计部 | Electromagnetic compatibility test method for electric propulsion system |
| CN101873144A (en) * | 2010-05-28 | 2010-10-27 | 北京航空航天大学 | Electromagnetic compatibility optimizing method for receiver in targeted frequency ranges |
Non-Patent Citations (4)
| Title |
|---|
| Design of the electromagnetic compatibility detection and diagnosis system based on LabVIEW;Yaqi Liu;《Engineering and Technology (S-CET)》;20120530;全文 * |
| Yaqi Liu.Design of the electromagnetic compatibility detection and diagnosis system based on LabVIEW.《Engineering and Technology (S-CET)》.2012,全文. |
| 复杂电磁环境下辐射发射测试系统分析与设计;杨醉;《中国优秀硕士学位论文全文数据库信息科技辑》;20120215;全文 * |
| 杨醉.复杂电磁环境下辐射发射测试系统分析与设计.《中国优秀硕士学位论文全文数据库信息科技辑》.2012,I135-14. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102749539A (en) | 2012-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102749539B (en) | Fast electromagnetic compatibility test and diagnosis system with quantization electromagnetic interference | |
| CN109828162B (en) | Electromagnetic interference prediction method and system | |
| CN104267265A (en) | Evaluating system and method based on radio astronomical instrument device electromagnetic radiation | |
| CN101493486B (en) | Apparatus and method for diagnosing electromagnetic interference | |
| CN102981086B (en) | Analysis and measurement method for electromagnetic radiation of voltage driven radiation source | |
| CN103777048A (en) | Internal chirp generator with time aligned acquisition in a mixed-domain oscilloscope | |
| CN105044520A (en) | Method and device for measuring electromagnetic emission characteristics of electronic device on site | |
| CN105891761A (en) | Scattering parameter-based partial discharge ultrahigh frequency detection system field check method | |
| CN102681009B (en) | Multi-channel transient Rayleigh wave test system and method | |
| CN105425060B (en) | A kind of interference detection method and detecting system of antenna coupling | |
| CN111385036A (en) | Radio frequency performance test method and device of wireless equipment and tester | |
| US9083418B2 (en) | Versatile antenna received signal strength measurement system not affecting antenna pattern and receiver performance | |
| CN204989336U (en) | Microwave subassembly remote control and measurement system based on long -range desktop | |
| CN111458662A (en) | Wireless communication transformer winding deformation frequency response method detection and operation system and method | |
| CN104698443A (en) | Simulation test simulating apparatus and system of complex radiofrequency interference | |
| CN114785432B (en) | Electronic product testing method and system | |
| CN211183962U (en) | Handheld radio frequency radiation immunity fault accurate diagnosis equipment | |
| CN111175640B (en) | Improved integrated circuit TEM cell radiation emission measuring device and method | |
| CN113311258A (en) | Semi-anechoic chamber device and electromagnetic compatibility EMC (electro magnetic compatibility) test method | |
| CN109765424A (en) | A kind of computer communication performance test macro | |
| CN118101084B (en) | Performance detection method and system based on radio frequency device | |
| CN114322917B (en) | Transformer winding detection method and device, electronic equipment and storage medium | |
| CN209878890U (en) | Electromagnetic interference detection system | |
| CN116074216B (en) | Test method and test device for vehicle-mounted Ethernet physical layer and cloud server | |
| US20220337326A1 (en) | Method and apparatus for estimating electromagnetic environmental effects on rf dependent systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |