连续波调频技术复用的光纤气体多点传感系统

Optical fiber gases sensing array with frequency modulated continuous wave technique

本文提出并实验完成了一种新型的光纤气体多点传感系统。利用连续波调频 (FMCW)技术复用多个气体吸收型光纤传感器 ,成功地实现了有两个传感探头的气体传感器阵列 ,系统最小可探测气体 (乙炔 )浓度大约为 30 0ppm( 2 .5cm气体吸收盒 ,一个大气压 )

A novel optical fiber gases sensing network system for monitoring the multi point gas sensors is described.Using the frequency modulated continuous wave (FMCW) technique,a two sensor array is realized for the detection of acetylene gas.Under atmospheric prseeure,the minimum detectable concentration is about 300ppm with 2.5cm gas cells.