传感技术学报2013，Vol.26Issue(2)：161-165,5.DOI:10.3969/j.issn.1004-1699.2013.02.004
基于石英增强光声光谱技术的开放光路气体传感系统研究
An Open Path Trace Gas Detection Sensor System Based on Quartz Enhanced Photoacoustic Spectroscopy
摘要
Abstract
To overcome such disadvantages as large volume,low real-time and inability to detect trace gas in narrow space in the conventional quartz enhanced photoacoustic spectroscopy ( QEPAS) system, a trace gas detection sensor system based on fiber lead open path QEPAS is investigated. The laser source is led to the central of two pins of the tuning fork(TF) by a fiber to realize the detection in narrow space. The experiment for detection of water vapour in the open environment was carried out to evaluate the sensitivity and stability of the system. A normalized noise equivalent absorption coefficient 7. 15×10-7 cm-1·W/Hz1/2 is achieved,which is about 5 times higher than that of conventional focus mode. The system has such advantages: small size, hard real-time, without sample sampling, and applied to the detection of trace gases in the open environment.关键词
气体传感/光声光谱/开放光路/石英音叉Key words
gas sensing/photoacoustic spectroscopy/open path/quartz tuning fork分类
机械制造引用本文复制引用
张洁,朱永,韦玮,林成,田莉,许祖稳..基于石英增强光声光谱技术的开放光路气体传感系统研究[J].传感技术学报,2013,26(2):161-165,5.基金项目
中央高校基本科研业务费项目(CDZR10120013) （CDZR10120013）
