分时差分式光纤甲烷气体检测仪的研制  

Study on Time - Sharing Difference Absorption Optical Fiber CH_4 Sensor

作　　者：米新江[1] 许爱东[2] 王英华[3] 李灵风[4] 

机构地区：[1]廊坊师范学院,河北廊坊065000 [2]河北半导体研究所,河北石家庄050051 [3]新疆特变电工股份有限公司,新疆昌吉831100 [4]燕山大学成人教育学院,河北秦皇岛066004

出　　处：《仪表技术与传感器》2003年第6期12-14,19,共4页Instrument Technique and Sensor

摘　　要：基于甲烷气体的吸收光谱特性,研制了一种用低廉LED作光源的新型分时差分式光纤甲烷气体检测仪。光源LED自动实行交替斩波,波长切换机构的灵巧设计可以用单光路实现差分吸收浓度检测,消除了双光路的差异。理论和实验表明,该结构既可以简化设计,又可有效抑制信号检测与传输中的同性干扰。Based on the CH4 absorption spectrum, a novel kind of transmission-type optical fiber CH4 detector with the low-cost illuminant of LED (automatically alternate chopped) is presented in this paper. Time-sharing difference absorption signal is realized by a smart design. The theory and experiments show that the sensor with optical fiber is simple for design, sufficient to suppress the interference and the variant from the double beam path.

关 键 词：分时差分光吸收 甲烷 检测仪 光纤传感器 研制 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置] TP212.14[自动化与计算机技术—控制科学与工程]