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Radiation prediction method based on frequency-domain common-mode current measurement

A common-mode current and prediction method technology, which is applied in the field of automotive electronic radiation emission, can solve the problem of high measurement cost, achieve wide dynamic range, reduce measurement time and measurement arrangement complexity, and reduce measurement cost.

Inactive Publication Date: 2017-09-22
CHINA AUTOMOTIVE ENG RES INST
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Problems solved by technology

A method that can quickly check out the frequency points beyond the standard and solve the high cost of the existing half-wave anechoic chamber method

Method used

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  • Radiation prediction method based on frequency-domain common-mode current measurement
  • Radiation prediction method based on frequency-domain common-mode current measurement
  • Radiation prediction method based on frequency-domain common-mode current measurement

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Embodiment Construction

[0032] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0033] The technical scheme that the present invention solves the problems of the technologies described above is:

[0034] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be mechanical connection or electrical connection, or two The internal communication of each element may be directly connected or indirectly connected through an intermediary. Those skilled in the art can understand the specific meanings of the above terms according to specific situations.

[0035] The present invention provides a radiation prediction method based...

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Abstract

The invention provides a phase reconstruction method based on current frequency-domain amplitude measurement. The method can quickly obtain missed phase information of the frequency-domain current, and can quickly predict the electromagnetic radiation level of an automobile wire harness by utilizing the current measurement amplitude and the calculated current phase information. The method can obtain common-mode current distribution and radiation prediction of a 30 MHz-1000 MHz cable and mainly comprises two parts: 1) obtaining of wire harness common-mode current: measuring the common-mode current, fitting the measurement results to obtain a smooth measurement curve, calculating common-mode parameters by utilizing a TRR optimization function and calculating phase distribution by utilizing a transmission line current calculation expression; and 2) prediction of common-mode radiation: serving the common-mode current obtained in the step 1) as a radiation source, calculating common-mode radiation of the wire harness by utilizing a wire harness multi-dipole antenna, calculating common-mode radiation of a finite conductive surface by utilizing a surface current method, and adding the two radiations to obtain the total radiation level.

Description

technical field [0001] The invention relates to the field of automotive electronic radiation emission, in particular to a radiation prediction method based on wire harness common-mode current measurement. Background technique [0002] With the high integration of automotive electronics and the rapid development of smart car networking technology. The mutual interference of automotive electronics is a problem that cannot be ignored, causing hidden dangers to driving safety and interference to the statutory frequency bands in the surrounding space. Therefore, automotive electronic components are required to pass relevant radiation emission limits, such as the national standard GB18655. In this standard, automotive electronic components are required to connect a 1.5m-2m wire harness, and must be measured in a half-wave anechoic chamber. The test cost of the half-wave anechoic chamber is too high for most parts manufacturers, and the delivery test period is long. Typically, r...

Claims

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Application Information

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IPC IPC(8): G01R29/08G01R31/00
CPCG01R29/0814G01R31/007
Inventor 贾晋赖志达李彪黄雪梅雷剑梅
Owner CHINA AUTOMOTIVE ENG RES INST
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