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The anti-interference technology of thermocouple channel used in rocket engine test system(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2009年03期
Page:
55-60
Research Field:
测控与试验
Publishing date:

Info

Title:
The anti-interference technology of thermocouple channel used in rocket engine test system
Author(s):
Liu Cha01; Feng Bin2; Wang Lixinl; Zhang Jinminl
1 School of Electrical Engineering and Automation，Harbin Institute of Technology，Harbin 150001，China 2 Beijing Aerospace Test Technology Institute，Beijing 100074，China
Keywords:
thermocouple channel; mix——earth; EMI filter; isolation module
PACS:
V416.6
DOI:
-
Abstract:
The thermocouple data collection channel，used for temperature measuring，is an im· portant part of rocket engine test system．Researching its immunity technology is helpful to improve the electromagnetic compatibility of the whole system．The structure of the thermoeouple data collec— tion channel，the analyses on the sensitive points of the channel are introduced in this paper．The generating mechanism and characteristic of EFT interference which is easily coupled into the thermoeouple channel are also presented in this paper．Three methods including mixed-ground，adding EMl filter，adding isolation module，are used to reduce the intensity of core-wired coupling EFT interference， and the system anti-interference capability is improved．At last，some other anti-interfer-ence measures and attention points are also introduced．All of these provide some valuable references for anti-interference design of thermocouple channel．

References:

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[3]史银建，袁春，刘云鸽．通信电缆屏蔽层EMC接地设计 分析．电力系统通信[J]．2005，26(157)：72—74．
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[5]J Basilio Simoes，M C Rui，Silva．ne optical coupling of analog signals，IEEE transactions on nuclear science[J]． 1996，43(3)-1672—1674．

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Last Update: 1900-01-01