摘要
相关检测技术是实现微弱信号检测的重要方法。本文介绍了该技术在非分散红外CO气体监测系统中的应用，根据相关检测理论，设计了同步相关检测电路，成功地实现了信号和噪声的分离度。实验表明，设计的基于相关检测的CO监测系统在O-200ppm的测量范围内有lOppb的监测精度。
Correlative technology plays an important role in detection of feeble signal. A novel method of Non-dispersion Infrared （NDIR） based on correlative technology for measuring CO trace gas and its application in the field measurement are described in this work. Synchronous correlative circuit designed according to correlative theory is used to separate the signal and noise. It is realized that the system have 0.01ppm resolution in the measure range from 0 to 200ppm.
出处
《光电工程》
EI
CAS
CSCD
北大核心
2006年第7期74-77,共4页
Opto-Electronic Engineering
基金
国家自然科学基金资助项目(10274080)
关键词
相关检测
非分散红外
环境监测
环境污染
Correlation detection
Non-dispersion infrared
Environmental monitoring
Environmental pollution
