CN102183696B - Surface current injection method substituted for electromagnetic compatibility radiation test - Google Patents
Surface current injection method substituted for electromagnetic compatibility radiation test Download PDFInfo
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- CN102183696B CN102183696B CN 201110051086 CN201110051086A CN102183696B CN 102183696 B CN102183696 B CN 102183696B CN 201110051086 CN201110051086 CN 201110051086 CN 201110051086 A CN201110051086 A CN 201110051086A CN 102183696 B CN102183696 B CN 102183696B
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Abstract
The invention discloses a surface current injection (SCI) technology substituted for an electromagnetic compatibility radiation test. By compact organic combination of a typical electromagnetic field theory and a calculation and engineering test method, a novel method for calculating a quantitative relation between the SCI and a radiation electromagnetic stress specified according to a test standard is deducted at first, and a novel, practical and complete test method is provided. Radio frequency inductive surface current on a tested piece is calculated by analyzing emission of an electromagnetic field in an electromagnetic compatibility test, transmission and declination of an electromagnetic wave, and interactive mechanism and a road between the tested piece and an external electromagnetic stress according to the electromagnetic field theory; and an electromagnetic field emission test is converted into a circuit conduction test, the cost of a test facility, an instrument and a test process is reduced obviously, and the practicability is enhanced.
Description
Technical field
The present invention relates to the test of a kind of high-level radiation substitute technology, specially refer to a kind of surface current method for implanting for substituting the Electro Magnetic Compatibility radiation test.
Background technology
In the electromagnetic compatibility energy-rich radiation class test of increasing various " platform " rank (such as aircraft, spacecraft, naval vessel, vehicle etc.) or large system level (such as HIRF, RS, thunder and lightning etc.), especially under the platform environment in kind of outfield, often run into proof stress and be difficult to generation or costly, experimental enviroment is difficult to satisfy, testing crew is stayed danger, process of the test can not operate, the problem of the technology that the relatively poor grade of test findings repeatability is difficult to overcome, economy, safe aspect.Engineering statistics electromagnetic environment field intensity magnitude mean value has thousands of V/m at present, and peak value reaches tens thousand of V/m; Lightning effects voltage reaches thousands of KV, and electric current reaches hundreds of KA.These high energy levels far exceed present actual tests ability level, namely are difficult to adapt to these requirements with the traditional experiment method.
In sum, for the limitation of prior art, need especially a kind of alternate test method addressing this problem, and surface current implantttion technique of the present invention is exactly a practical approach.
Summary of the invention
The purpose of this invention is to provide a kind of surface current method for implanting for substituting the Electro Magnetic Compatibility radiation test, according to Theory of Electromagnetic Field, emission, electromagnetic wave propagation and decline by analyzing electromagnetic field in the electromagnetic compatibility test, be subjected to test specimen and the interaction mechanism, the approach that add electromagnetic stress, the radio frequency induction surface current that is subjected on the test specimen is obtained in calculating, and the electromagnetic field emissions test is converted to circuit conduction test.
Technical matters solved by the invention can adopt following technical scheme to realize:
1) determines that radiation test is stipulated or the high strength field intensity of customer requirements
2) according to the emitting antenna of radiation test regulation to the distance that is subjected to the test specimen surface, radiating antenna directivity, utilize the communication distance equation to calculate and be subjected to test specimen surface electromagnetism intensity:
In the formula:
To be subjected to test specimen surface radiation field intensity, P
tThe output power of emitting antenna, G
tThe gain of emitting antenna, d be emitting antenna to the distance of test specimen surface, λ is the wavelength of radiation field;
3) electromagnetism and the magnetic field dependence calculating by far zone field in the free space is subjected to test specimen surface magnetic field intensity:
In the formula:
To be subjected to test specimen surface radiation field intensity,
It is radiation field direction of propagation unit vector;
4) polarised direction according to radiation field is subjected to the surperficial tangential magnetic field component of test specimen surface with the space angle relation calculating that is subjected to the test specimen surface:
In the formula:
Be to be subjected to test specimen surface radiation field tangential component, θ is the polarised direction of radiation field and is subjected to the angle on test specimen surface;
5) calculate the surface current value that injected by the test specimen surface:
6) by the surface current J of surface current probe to calculated by the test specimen injection
Inject, finish test.
In one embodiment of the invention, described method substitutes the electromagnetic field radiation coupling scheme with the Injection Current coupling scheme.
Key of the present invention is to have derived theoretically the transition function between the sensitive surface electric current on radiation field intensity and the metal surface, obtained the computing formula of surface current value, solved " surface current injection " the method for substitution key parameter of " electromagnetic field radiation test ", be definite problem that surface current injects value, lay a good foundation for realizing the research that substitutes high radiation field test method of substitution with the surface current implantttion technique.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below further set forth the present invention.
In the test of high-level radiation electromagnetic susceptibility, open electromagnetic radiation field strength, weaken except being inversely proportional to the spatial square distance, only have very little part energy to be radiated at and be subjected on the test specimen (containing housing, cable), and these energy also major part be reflected, diffraction, only have the refraction of fraction energy to penetrate into and be subjected to test specimen inside to be converted into induction current/voltage, so on this meaning, the Energy Efficiency Ratio of electromagnetic radiation sensitivity testing is extremely low.The surface current substitute technology is exactly that electric current is injected on the cabinet or cable that is subjected to test specimen, substitutes the electromagnetic radiation coupling scheme with the Injection Current coupling scheme, produces same distribution of current at casing or wire, is subjected to test specimen to produce same response thereby make.Obviously current injection is more much higher than the efficient of electromagnetic field radiation.Add the electromagnetic radiation field strength and to be transmitted to quantitative relation---transport function between the induction current/voltage that is subjected to test specimen inside if grasp, just can be directly to being subjected to test specimen to apply corresponding induction current/voltage, and obtain same electromagnetic stress effect, so the key of problem is exactly to seek the transition function between the sensitive surface electric current on radiation field intensity and the metal surface.
Can think the good conductor surface electrical line of force and surperficial quadrature on the engineering, the magnetic line of force is tangent with the surface.By the basic boundary relation of electromagnetic field the radiation field magnetic field intensity is arranged
Conductive surface mirror field magnetic field intensity
Vow with conductive surface line of induction current density
The pass be
The total electromagnetic wave magnetic field intensity of conductor external space tangential component H
CutEqual conductive surface line of induction current density amplitude J on the numerical value
LineThe general total electromagnetic field of the conductor external space is the result of the interaction balance of radiation field and conductor reflecting surface, reflection wave, asks total magnetic intensity
It is complicated boundary value problem.The radiation field source all is not in infinitely great ideal space with being subjected to test specimen in the practical problems, near object planform, material behavior etc. will cause the distortion of radiation field, essential some disturbance corrections of introducing when analytical calculation, be difficult to obtain problem result's analytical expression, can only seek help from the high-speed computer numerical evaluation.The uncertainty of disturbance also is not easy accurately to obtain, revise on engineering in addition.Find the solution conductive surface line of induction current density amplitude J line so be difficult to accurate Calculation.If the reflecting body dimension and be good conductor when surperficial much larger than wavelength under the far field condition fortunately, can adopt the conclusion of equation (1) on the engineering: the line of induction current density amplitude J of conductive surface point
LineEqual the twice 2H of this incident field magnetic field intensity tangential component on the value
Enter to cut, this is good being similar to, so that problem is greatly simplified.This is likely that also theory finds the solution optimal path and the breakthrough point that injects the conductive surface electric current.According to the distance on radiation field source amplitude/polarization, radiating antenna directivity, source to surface interested, can be easier to calculate the radiation field magnetic field intensity of conductor outside surface by the communication equation
And tangential component H
Enter to cut
In one embodiment of the invention, comprise the steps:
1) determines that radiation test is stipulated or the high strength field intensity of customer requirements
2) according to the emitting antenna of radiation test regulation to the distance that is subjected to the test specimen surface, radiating antenna directivity, utilize the communication distance equation to calculate and be subjected to test specimen surface electromagnetism intensity:
In the formula:
To be subjected to test specimen surface radiation field intensity, P
tThe output power of emitting antenna, G
tThe gain of emitting antenna, d be emitting antenna to the distance of test specimen surface, λ is the wavelength of radiation field;
3) electromagnetism and the magnetic field dependence calculating by far zone field in the free space is subjected to test specimen surface magnetic field intensity:
In the formula:
To be subjected to test specimen surface radiation field intensity,
It is radiation field direction of propagation unit vector;
4) polarised direction according to radiation field is subjected to the surperficial tangential magnetic field component of test specimen surface with the space angle relation calculating that is subjected to the test specimen surface:
In the formula:
Be to be subjected to test specimen surface radiation field tangential component, θ is the polarised direction of radiation field and is subjected to the angle on test specimen surface;
5) calculate the surface current value that injected by the test specimen surface:
6) by the surface current J of surface current probe to calculated by the test specimen injection
Inject, finish test.
Above demonstration and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; all in the claimed scope of the invention, the claimed scope of the present invention is defined by appending claims and equivalent thereof these changes and improvements.
Claims (2)
1. a surface current method for implanting that is used for substituting the Electro Magnetic Compatibility radiation test is characterized in that, described method comprises the steps:
1) determines that radiation test is stipulated or the high strength field intensity of customer requirements
2) according to the emitting antenna of radiation test regulation to the distance that is subjected to the test specimen surface, radiating antenna directivity, utilize the communication distance equation to calculate and be subjected to test specimen surface electromagnetism intensity:
In the formula:
To be subjected to test specimen surface radiation field intensity, P
tThe output power of emitting antenna, G
tThe gain of emitting antenna, d be emitting antenna to the distance of test specimen surface, λ is the wavelength of radiation field;
3) electromagnetism and the magnetic field dependence calculating by far zone field in the free space is subjected to test specimen surface magnetic field intensity:
In the formula:
To be subjected to test specimen surface radiation field intensity,
It is radiation field direction of propagation unit vector;
4) polarised direction according to radiation field is subjected to the surperficial tangential magnetic field component of test specimen surface with the space angle relation calculating that is subjected to the test specimen surface:
In the formula:
Be to be subjected to test specimen surface radiation field tangential component, θ is the polarised direction of radiation field and is subjected to the angle on test specimen surface;
5) calculate the surface current value that injected by the test specimen surface:
6) by the surface current J of surface current probe to calculated by the test specimen injection
Inject, finish test.
2. the surface current method for implanting for substituting the Electro Magnetic Compatibility radiation test as claimed in claim 1, described method substitutes the electromagnetic field radiation coupling scheme with the Injection Current coupling scheme.
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| CN 201110051086 CN102183696B (en) | 2011-03-03 | 2011-03-03 | Surface current injection method substituted for electromagnetic compatibility radiation test |
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| CN102183696B true CN102183696B (en) | 2013-03-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102426310B (en) * | 2011-10-09 | 2014-03-19 | 中国航空无线电电子研究所 | Novel full aircraft high-strength irradiation test method |
| CN105044494A (en) * | 2015-06-29 | 2015-11-11 | 中国航空无线电电子研究所 | Surface current injection measurement method used for electromagnetic compatibility test |
| CN108872739B (en) * | 2018-05-10 | 2020-11-13 | 中国人民解放军陆军工程大学 | Equivalent test method for electromagnetic radiation effect of glowing bridge wire type electric explosion device |
| CN109655670B (en) * | 2018-11-21 | 2021-04-02 | 上海无线电设备研究所 | Low-level direct-drive high-intensity radiation field effect test system and test method |
| CN114167148A (en) * | 2021-12-03 | 2022-03-11 | 中国工程物理研究院流体物理研究所 | System for simulating X-ray irradiation satellite to generate electromagnetic field |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5440316A (en) * | 1991-07-30 | 1995-08-08 | Andrew Podgorski | Broadband antennas and electromagnetic field simulators |
| EP0982594A1 (en) * | 1998-08-24 | 2000-03-01 | BRITISH TELECOMMUNICATIONS public limited company | Method and apparatus for electromagnetic emissions testing |
| CN101191806A (en) * | 2006-11-29 | 2008-06-04 | 比亚迪股份有限公司 | Apparatus and method for testing automobile electromagnetic sensitivity |
| CN101915877A (en) * | 2010-07-02 | 2010-12-15 | 北京航空航天大学 | Bus technology-based universal electromagnetic susceptibility testing device and method |
| CN201690239U (en) * | 2010-03-04 | 2010-12-29 | 北京博电新力电力系统仪器有限公司 | Precision program-controlled high-current injector for super-high-voltage power transmission and transformation system |
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2011
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5440316A (en) * | 1991-07-30 | 1995-08-08 | Andrew Podgorski | Broadband antennas and electromagnetic field simulators |
| EP0982594A1 (en) * | 1998-08-24 | 2000-03-01 | BRITISH TELECOMMUNICATIONS public limited company | Method and apparatus for electromagnetic emissions testing |
| CN101191806A (en) * | 2006-11-29 | 2008-06-04 | 比亚迪股份有限公司 | Apparatus and method for testing automobile electromagnetic sensitivity |
| CN201690239U (en) * | 2010-03-04 | 2010-12-29 | 北京博电新力电力系统仪器有限公司 | Precision program-controlled high-current injector for super-high-voltage power transmission and transformation system |
| CN101915877A (en) * | 2010-07-02 | 2010-12-15 | 北京航空航天大学 | Bus technology-based universal electromagnetic susceptibility testing device and method |
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