摘要
光致热弹光谱是一种基于石英音叉热弹效应的新型气体检测技术,具有成本低、体积小、灵敏度高及光谱响应范围宽等优点,是目前一种重要的痕量气体检测方法。本文首先分析了基于光致热弹光谱的气体浓度测量原理,其次,从提高检测系统灵敏度的各种技术方法角度出发,介绍了近年来开发的提高石英音叉热弹光谱系统检测灵敏度的技术方法,从信号幅值、信噪比、最小检出限和归一化噪声等效吸收系数等方面,对系统的性能改进提升效果进行评估。最后,简要评述了光致热弹光谱在现场气体检测中的应用研究进展,对进一步提高检测系统灵敏度的方法进行了总结与展望。
Laser-Induced Thermo-Elastic Spectroscopy(LITES)is a new developed gas detection technology based on the thermoelastic effect of Quartz Tuning Forks(QTF).The QTF has the advantages of low cost,small volume,high sensitivity and wide spectral response range,and the LITES is becoming a vital method for trace gas detection.In this paper,the basic principle of gas concentration measuring based on LITES is firstly analyzed.Secondly,from the perspective of various technical methods,this paper introduces the methods for improving the sensitivity of QTF detectors,and reviews the research progress of LITES sys-tem in recent years.The performance of these systems is evaluated by the signal amplitude,Signal-to-Noise Ratio(SNR),minimum detection limit,and Normalized Noise Equivalent Absorption(NNEA)coefficient.Finally,the practical application of LITES in the field of gas detection technology is briefly reviewed,and the methods for further improving its sensitivity are summarized and prospected.
作者
娄存广
代佳亮
李瑞凯
刘秀玲
姚建铨
LOU Cun-guang;DAI Jia-liang;LI Rui-kai;LIU Xiu-ling;YAO Jian-quan(College of Electronic and Information Engineering,Hebei Key Laboratory of Digital Medical Engineering,Hebei University,Baoding 071002,China;College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Tianjin 300072,China;Affiliated Hospital of Hebei University,Baoding 071000,China)
出处
《中国光学（中英文）》
EI
CAS
CSCD
北大核心
2023年第2期229-242,共14页
Chinese Optics
基金
国家自然科学基金区域创新发展联合基金(No.U20A20224)
河北省自然科学基金(No.F2021201005)
河北省科技计划项目(No.22321701D)
河北省高等学校科学技术研究项目(No.ZD2022072)。
关键词
热弹光谱
石英音叉
气体检测
传感器
光声效应
thermoelastic spectroscopy
quartz tuning fork
gas detection
sensor
photoacoustic effect
