Design on faint signal processing circuit for difference absorption gas sensor

WANG Yan-ju ~

doi:10.13873/j.1000-97872006.06.004

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Design on faint signal processing circuit for difference absorption gas sensor

更新时间：2025-09-11

- Design on faint signal processing circuit for difference absorption gas sensor
- Issue 6, Pages: 13-15(2006)
- 作者机构：
  
  1. 燕山大学电气工程学院
  2. 大庆石油学院秦皇岛分院,河北,秦皇岛,066004
  3. 河北师范大学电子系
  4. ,河北,石家庄,050031
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-97872006.06.004
  CLC： TP274.2
- Published：2006
- 稿件说明：
移动端阅览
[1]王艳菊,王玉田,王忠东.用于气体差分检测的微弱信号处理电路的研究[J].传感器与微系统,2006(06):13-15.

WANG Yan-ju ~. Design on faint signal processing circuit for difference absorption gas sensor[J]. 2006, (6): 13-15.
[1]王艳菊,王玉田,王忠东.用于气体差分检测的微弱信号处理电路的研究[J].传感器与微系统,2006(06):13-15. DOI： 10.13873/j.1000-97872006.06.004.

WANG Yan-ju ~. Design on faint signal processing circuit for difference absorption gas sensor[J]. 2006, (6): 13-15. DOI： 10.13873/j.1000-97872006.06.004.

摘要

为了提高气体差分传感系统的信噪比

基于微弱信号的相关检测原理

设计了以锁相放大器为核心的微弱信号处理电路。实验表明:电路输出电压与检测气体体积分数呈线性关系

电路对气体体积分数的检测极限为150×10-6

检测系统对检测气体体积分数的误差为1%

具有较好的重复性及选择性。

Abstract

In order to improve signal to noise ratio（SNR） of the differential absorption gas sensor system

based on the correlation detection principle

a faint signal processing circuit is designed centering around lock-in amplifier.Experimental results indicate that the output voltage of detective circuit is linear with the gas volume fraction

the limit value is 150×10

-6

.The error of the whole detection system to the gas volume fraction is 1 %

the repeatability and selectivity of the system is better.

关键词

Keywords

references

差分吸收式光纤甲烷气体传感器的研究 [J]. 王玉田,郭增军,王莉田. 光电子·激光 . 2001(07)

微弱信号检测[M]. 清华大学出版社 , 高晋占编著, 2004

光电探测原理[M]. 西安电子科技大学出版社 , 安毓英,曾晓东编著, 2004

光电系统与信号处理[M]. 科学出版社 , 叶嘉雄等编著, 1997

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