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Method for eliminating environment electrical level suitable for electromagnetic radiation transmitting automatic test

A technology of electromagnetic radiation emission and environmental level, which is applied in the direction of electromagnetic field characteristics, can solve the problems of judging the radiation emission of the tested product, the accuracy of the test results is reduced, and the electromagnetic compatibility test site is not realistic, so as to improve the test response speed, The effect of saving test cost and improving test efficiency

Active Publication Date: 2009-01-21
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the environmental level is relatively complex, it is impossible to judge the radiation emission of the tested product from the test results, which greatly reduces the accuracy of the test results
[0006] The standard electromagnetic radiation emission test has strict regulations on the test site and so on. The test cost in the standard environment is very expensive, but it is not realistic for most units to build their own electromagnetic compatibility test site. More importantly, in many cases it is necessary Pre-test the electromagnetic radiation emission of the equipment in the field where the environmental level is relatively complicated, so it is solved to extract the radiation emission of the tested product from the electromagnetic radiation emission test results in the complex electromagnetic environment, and exclude the impact of the environmental level on the test results under non-standard test conditions The impact is significant

Method used

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  • Method for eliminating environment electrical level suitable for electromagnetic radiation transmitting automatic test
  • Method for eliminating environment electrical level suitable for electromagnetic radiation transmitting automatic test
  • Method for eliminating environment electrical level suitable for electromagnetic radiation transmitting automatic test

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] Example 1: far field situation

[0108] Receiving antenna, EMI (electromagnetic interference) receiver and PC according to figure 1 The structure shown constitutes an automatic electromagnetic radiation test system. The receiving antenna selects the ZN30505C model logarithmic periodic antenna of Beijing Radio No. 2 Factory. EMI (Electromagnetic Interference) Receiver chooses ESIB 40 of R&S Company. The minimum configuration of the PC is: CPU 2GHz, memory 1GB, hard disk 80GB.

[0109] Tested product: the navigation module of the XXX drone.

[0110] Test frequency band: 100MHz~300MHz; the center frequency f of the test frequency band 0 =200MHz.

[0111] The distance d between the first test point A and the tested product A = 2.2m.

[0112] The distance d between the second test point B and the tested product B = 5.5m.

[0113] According to the "third step" of the method of eliminating the background environment level, the background environment level N is colle...

Embodiment 2

[0117] Example 2: near field situation

[0118] Receiving antenna, EMI (electromagnetic interference) receiver and PC according to figure 1 The structure shown constitutes an automatic electromagnetic radiation test system. The receiving antenna selects the LPDA-9531 model logarithmic periodic antenna of Shenzhen Airlines Huajie Company. EMI (Electromagnetic Interference) Receiver chooses ESIB 40 of R&S Company. The minimum configuration of the PC is: CPU 2GHz, memory 1GB, hard disk 80GB.

[0119] Tested product: Inertial navigation module of XXX UAV.

[0120] Test frequency band: 10MHz~100MHz; the center frequency f of the test frequency band 0 = 55MHz.

[0121] The distance d between the first test point A and the tested product A = 0.6m.

[0122] The distance d between the second test point B and the tested product B = 0.8m.

[0123] According to the "third step" of the method of eliminating the background environment level, the background environment level N is ...

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Abstract

The invention discloses a method for eliminating ambient level in the electromagnetic radiation emission automatic test, which adopts the field superposition principle and a dipole antenna radiation model, collects the correlative quantities of two test points of different distances and utilizes an ambient level elimination module to analyze the far field or near field condition, to find the approximate solution of the radiation emission at the first test point A of a sample. The instruments demanded by the electromagnetic radiation emission automatic comprise a receiving antenna, a EMI receiver and a PC, wherein the receiving antenna is connected with the input interface of the EMI receiver, the PC is connected with the control interface of the EMI receiver and contains an ambient level elimination module composed of a near-far field judgment unit, a far field analysis unit and a near field analysis unit. The method can extract the radiation emission of a sample from the test result under a complex electromagnetic condition, to effectively eliminate the effect of the background ambient level on the test result under a non-standard test condition.

Description

technical field [0001] The invention relates to a method for analyzing electromagnetic radiation test results, more particularly, a method suitable for eliminating environmental levels in automatic testing of electromagnetic radiation emissions. This elimination method can eliminate the influence of the background environment level on the radiation test results. Background technique [0002] Electromagnetic radiation emission refers to the intentional or unintentional electromagnetic energy radiated by a certain component, antenna, cable or connector in the equipment and propagated through space. [0003] The purpose of the electromagnetic radiation emission test is to measure the electromagnetic radiation emitted by electronic, electrical and electromechanical equipment, to detect the interference radiation field strength of the tested product, and to judge its electromagnetic compatibility (EMC). The electromagnetic radiation emission automatic test system is generally co...

Claims

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Application Information

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IPC IPC(8): G01R29/08
Inventor 苏东林戴飞宋振飞谢树果高万峰史德民
Owner BEIHANG UNIV