CN101710160B - Method for measuring electromagnetic compatibility margin of electronic and electric equipment - Google Patents
Method for measuring electromagnetic compatibility margin of electronic and electric equipment Download PDFInfo
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- CN101710160B CN101710160B CN2009102733896A CN200910273389A CN101710160B CN 101710160 B CN101710160 B CN 101710160B CN 2009102733896 A CN2009102733896 A CN 2009102733896A CN 200910273389 A CN200910273389 A CN 200910273389A CN 101710160 B CN101710160 B CN 101710160B
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Abstract
The invention provides a method for measuring electromagnetic compatibility margin of electronic and electric equipment. An electromagnetic ambient level capable of being born by the equipment is adopted to quantitatively express the electromagnetic sensitivity characteristic of the equipment, the electromagnetic ambient level at a work area of the equipment is adopted to quantitatively express the positioned actual working condition of the equipment, and the actually reached compatible working degree of the equipment is quantitatively described through a logarithmic value of two ambient level data ratios, wherein the electromagnetic ambient level capable of being born by the equipment adopts the level in an electromagnetic compatibility detection sensitivity project checking test in a standard GJB151A-97. The electromagnetic compatibility detection sensitivity project checking test is called as EMS for short and is a test using the tested equipment as an interfered object and applying interference to the tested equipment through a testing instrument to test the anti-interference capability thereof. The invention can quantitatively and exactly express the electromagnetic compatibility margin of the electronic and electric equipment, and can provide exact evaluation and judgment for the electromagnetic interference capability formed by any thing in the positioned electromagnetic environment of the equipment.
Description
Technical field
The invention belongs to engineering electromagnetic compatibility technology field, be specifically related to a kind of quantivative approach of weighing electronic electric equipment electromagnetic compatibility degree.
Background technology
Electromagnetic compatibility one speech derives from Electromagnetic Compatibility (abbreviation EMC), and the given definition of International Electrotechnical Commissio (IEC) is: equipment or system can operate as normal in its electromagnetic environment and the ability of the electromagnetic interference (EMI) that can not bear anything formation in this environment.Electromagnetic interference (EMI)-ElectroMagnetic Interference (abbreviation EMI) refers to anyly may interrupt, hinder, even the conduction of reduction, restricts radio communication or other electronic electric equipment performance or the electromagnetic energy of radiation.For radio communication equipment, when interfering energy met or exceeded the communication facilities receiving sensitivity, the effect that will cause receiving sensitivity to descend had in the use promptly produced interference.To be subjected to annoyance level in order reflecting, to adopt interference margins to represent usually, that is: interference margins=interfering energy (dB)-receiving sensitivity (dB).The notion of interference margins comes from the AD of U.S. government report " IEMCAP ".According to this definition, when interfering energy during greater than receiving sensitivity, with the interference margins that occurs greater than 0; When interference margins increases, reflect that the degree that equipment is interfered increases; When interference margins is negative, show that equipment is in compatible state.Therefore, adopt interference margins to go out the compatibility of apparatus state by quantificational expression.
The calculating of interference margins is often more suitable to the receiver with selecting frequency characteristic, because the technical parameters such as sensitivity of receiver are more definite, and for general electronic electric equipment, the comparison difficulty then becomes.In actual engineering,, and have influence on comprehensive evaluation to equipment and system's electromagnetic compatibility state often owing to lack the electromagnetic compatibility degree of related characteristics data can not the quantitative Analysis equipment work time.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of method of measuring electromagnetic compatibility margin of electronic and electric equipment, electromagnetic compatibility nargin that can the quantitative expression electronic electric equipment.
The present invention solves the problems of the technologies described above the technical scheme of being taked to be: a kind of method of measuring electromagnetic compatibility margin of electronic and electric equipment is characterized in that: it may further comprise the steps:
Determine the electromagnetic ambient level that equipment can bear;
Determine the actual working environment level of this equipment;
According to formula:
Calculate the compatible nargin of this equipment.Press such scheme, the electromagnetic ambient level that the electromagnetic ambient level that described equipment can bear is applied in electromagnetic compatibility detection sensitive items certification test for this equipment.
Press such scheme, described actual working environment level is directly tested in the electromagnetic environment of equipment work zone and is obtained.
Press such scheme, described actual working environment level obtains according to the electromagnetic environment prediction of equipment work zone.
Principle of work of the present invention is: the electromagnetic ambient level that employing equipment can bear comes the electromagnetic susceptibility characteristic of quantificational expression equipment, adopt this equipment work zone electromagnetic ambient level to come its residing actual operating conditions of quantificational expression, by the logarithm value of two kinds of ambient level data ratios, quantitative description equipment is actual reach can compatible working level.Wherein the equipment electromagnetic ambient level that can bear adopts the level in the electromagnetic compatibility detection sensitive items certification test in the GJB151A-97 standard.Electromagnetic compatibility detection sensitive items certification test is called for short EMS, is to be disturbed object with equipment under test, by testing tool it is applied interference, tests the test of its antijamming capability.
Beneficial effect of the present invention is: electromagnetic compatibility nargin that 1, can the quantitative expression electronic electric equipment; 2, the result can accurately reflect the electromagnetic compatibility degree of electronic electric equipment; 3, can provide the electromagnetic interference capability of anything formation in its electromagnetic environment of living in for equipment and estimate accurately and judge.
Embodiment
The electromagnetic ambient level that equipment can bear is the electromagnetic ambient level that equipment under test is applied in electromagnetic compatibility detection sensitive items certification test, can adopt electromagnetic compatibility detection sensitive items certification test in the GJB151A-97 standard, when equipment has passed through the susceptibility examination, show that then the electromagnetic ambient level that this equipment can bear can be determined by the above-mentioned level that applies; Also can determine according to this type of parameter that equipment producer provides.
Described actual working environment level can directly be tested in the electromagnetic environment of equipment work zone and obtain, also can be according to equipment work zone electromagnetic environment by predicting and calculating.
According to the definition of compatible nargin, in the time can bearing ambient level and be higher than the actual environment level, the compatible nargin that calculates on the occasion of.Compatible nargin is big more, and it is many more to show that ability to bear exceeds actual environment, and the possibility that interference phenomenon promptly occurs is more little.Therefore, adopt compatible nargin index, can express electromagnetic compatibility degree that each relevant electronic electric equipment is had under the designated environment condition or the possibility size of being disturbed clearly.
With certain type ruggedized computer is example, and itself and other multiple devices are worked in a certain cabin simultaneously.By overall electromagnetic environment test, when each equipment operate as normal, the electric field environment level of ruggedized computer present position is 1.5V/m; Because ruggedized computer has passed through the RS103 project check of GJB151A-97 standard, the electric field environment level that can bear is 5V/m; According to the computing method of " compatible nargin ", the compatible nargin of this equipment under this working condition is:
When practical engineering project was used, the control of the magnitude of hardware compatibility nargin generally was to determine according to the importance of equipment.Can be with reference to the limit value of related standards to margin of safety, as: important system should have the margin of safety of 6dB, the defense preparations that contain the electric initiation device should have the margin of safety of 16.5dB.
Claims (1)
1. the method for a measuring electromagnetic compatibility margin of electronic and electric equipment, it is characterized in that: it may further comprise the steps:
Determine the electromagnetic ambient level that equipment can bear;
Determine the actual working environment level of this equipment;
According to formula:
Calculate the compatible nargin of this equipment;
The electromagnetic ambient level that the electromagnetic ambient level that described equipment can bear is applied in electromagnetic compatibility detection sensitive items certification test for this equipment;
Described actual working environment level is directly tested in the electromagnetic environment of equipment work zone and is obtained, and perhaps obtains according to the electromagnetic environment prediction of equipment work zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102733896A CN101710160B (en) | 2009-12-25 | 2009-12-25 | Method for measuring electromagnetic compatibility margin of electronic and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102733896A CN101710160B (en) | 2009-12-25 | 2009-12-25 | Method for measuring electromagnetic compatibility margin of electronic and electric equipment |
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| Publication Number | Publication Date |
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| CN101710160A CN101710160A (en) | 2010-05-19 |
| CN101710160B true CN101710160B (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102733896A Active CN101710160B (en) | 2009-12-25 | 2009-12-25 | Method for measuring electromagnetic compatibility margin of electronic and electric equipment |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106314822B (en) * | 2014-03-17 | 2018-08-10 | 中国航空无线电电子研究所 | Aircraft electromagnetic environment Safety Margin code method |
| CN107228987B (en) * | 2017-06-09 | 2020-03-20 | 中国电器科学研究院股份有限公司 | Special capability verification method for electric vehicle electromagnetic field test and comb signal generator |
| CN109239490B (en) * | 2018-08-29 | 2021-02-09 | 中国空间技术研究院 | EMC margin test method of satellite-borne receiver |
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2009
- 2009-12-25 CN CN2009102733896A patent/CN101710160B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| 宋文武等.EMC安全裕度评估方法探讨.《船舶电子工程》.1998,(第4期),44,48-52. * |
| 宋海峰等.信息系统电磁环境效应(E3)评估研究.《中国电子科学研究院学报》.2008,第3卷(第4期),364-369. * |
| 齐杏林等.电点火系统在电磁辐射下的安全裕度测量.《火工品》.2004,(第4期),11-18. * |
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| CN101710160A (en) | 2010-05-19 |
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