›› 2011, Vol. 24 ›› Issue (2): 33-.

• 论文 • 上一篇    下一篇



  1. (南京航空航天大学 自动化学院,江苏 南京 210016)
  • 出版日期:2011-02-15 发布日期:2011-02-23
  • 作者简介:刘玉宾(1985-),男,硕士研究生。研究方向:光电技术,无线传感器网络,嵌入式系统设计。 丁万山(1949-),男,硕士生导师。研究方向:光电检测技术,嵌入式系统。

Monitoring System for Methane Concentration Based on ARM and the Rational Filter

 LIU Yu-Bin, DING Wan-Shan   

  1. (College of Automation Engineering,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China)
  • Online:2011-02-15 Published:2011-02-23



关键词: 监测, 甲烷, 红外, 锁相放大器, 有理数滤波


The system of methane concentration data collection is introduced.This system uses the detection technology based on the theory of molecular absorption of infrared radiation to design a system of CH4 concentration detection infrared sensors,which have fast response and can work under hazardous conditions.The signal conditioning circuit uses the lock-in amplifier for weak signal detection,and by using the rational filtering algorithm to process the data in software design,it can significantly improve the accuracy and stability of detection.Experimental results show that the testing precision is 5 ppm.It can be widely used in dangerous gas monitoring in such sectors as chemistry,electric power and mining.

Key words: monitoring;methane;infrared sensor;lock-in amplifier;rational filtering


  • TP212