中国激光, 2010, 37 (6): 1505, 网络出版: 2010-07-07
基于谐波峰平比法的实用化光纤气体传感器研究
Research on Practicality of Methane Gas Sensor Based on Harmonic Peak to Average Power Ratio
光纤光学 气体传感器 可调谐半导体激光吸收光谱 峰平比法 fiber optics gas sensor tunable diode laser absorption spectroscopy peak to average power ratio
摘要
可调谐半导体激光吸收光谱(TDLAS) 技术是近年来发展起来的一种新型光纤气体传感器技术,目前这种技术主要有3类方法:谐波幅度法,一、二次谐波幅度比值法,差分法。针对这3类方法的特点与不足进行综合分析,并在此基础上提出了谐波峰平比法(PAPR)。采用该方法设计的光纤甲烷气体传感器性能稳定,样机经相关机构检测后表明,传感器响应时间为10 s,在0~5×10-3的量程内,检测精度达满量程的5%,灵敏度为2×10-5。
Abstract
Tunable diode laser absorption spectroscopy technology is a developing technollgy on new optical gas sensor in recent years, currently there are three research methods: harmonic amplitude method, first to second harmonic signal amplitude ratio method and difference method. The harmonic peak to average power ratio (PAPR) is proposed on the base of comprehensive analyzing on the features and disadvantages of those three methods. The performance of optical methane gas sensor with new method is stable, and the detection results of the prototype are as follows: response time of sensor is 10 s, in the range of 0~5×10-3 the detection precision and sensitivity are 5% of full scale and 2×10-5, respectively.
王琢, 曹家年, 张可可, 冯琳琳. 基于谐波峰平比法的实用化光纤气体传感器研究[J]. 中国激光, 2010, 37(6): 1505. Wang Zhuo, Cao Jianian, Zhang Keke, Feng Linlin. Research on Practicality of Methane Gas Sensor Based on Harmonic Peak to Average Power Ratio[J]. Chinese Journal of Lasers, 2010, 37(6): 1505.