光纤乙炔气体检测系统的研究

Study of optical fiber detection system of acetylene gas

基于乙炔气体的光谱吸收特性,提出了一种带有参考通道的光纤乙炔气体在线实时检测系统。为了消除被测气体以外的其它随机因素的影响,在设计过程中采用了双光源、双光路、双气室结构。论述了运用双波长补偿法来克服系统中存在的光路扰动、解决系统不稳定问题、提高测量准确度的原理。给出了该光纤乙炔气体测量系统的实验结果。

Based on the characteristic of spectrum absorption of acetylene,an set of optical fiber detection system of acetylene gas is presented,which has reference channel and is for online and realtime detection.In order to eliminate the effect of other factors on measurement precision,the double light sources,double light paths and double cells are used in this system.Because of the use of double wavelength compensating method,this system can eliminate the disturbance in the optical paths,the problem of instability is solved and the measurement precision is greatly enhanced.Some experimental results are presented.