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

作　　者：王琢[1,2] 曹家年[1] 张可可 冯琳琳[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]东北林业大学机电工程学院,黑龙江哈尔滨150040

出　　处：《中国激光》2010年第6期1505-1509,共5页Chinese Journal of Lasers

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。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.

关 键 词：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 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]