基于光热效应的光纤甲烷气体传感研究
Research on Optical Fiber Methane Sensor based on Photothermal Effect
Abstract
随着现代工业的发展,有毒、有害气体已成为人们生活和生产中需要重视的危险来源。以易燃、易爆的甲烷气体为例,由于它是重要的工业气体原料和日常生活中普遍使用的燃气,因此对其进行有效实时的浓度检测具有十分重要的意义。与传统电学类气体传感器相比,光纤气体传感器有着本质安全、检测灵敏度高、抗环境干扰能力强等优点,因此一直以来都受到国外内研究学者的关注和重视。 作为典型的光纤气体传感器,吸收光谱型光纤气体传感器的依据是气体在近红外波段的选择吸收效应,可分为直接吸收效应(光强衰减)和间接吸收效应(光热或光声效应)。本文便是根据气体的光热效应产生的相位变化检测气体的浓度,并首次提出采用直线型Sagnac干... With the development of industry,toxic and harmful gases have become the source of danger that people must take seriously. For example, as flammable and explosive gas , methane is an important kind of industrial raw material and fuel gas in people’s daily life. It’s important to carry out effective and eal-time concentration detection. Compared withtraditional electrical gas sensor, the optical...