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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 )
This paper presents and experimentally completes a new type of optical fiber gas multi-point sensing system. A gas sensor array with two sensing probes has been successfully implemented by multiplexing multiple gas absorption fiber sensors using continuous wave frequency modulation (FMCW) technology. The minimum detectable gas (acetylene) concentration of the system is about 30 0 ppm (2.5 cm Gas absorption box, one atmosphere)