车载甲烷巡检仪的光路优化设计与系统实现

Optical Path Optimization Design and System Implementation of the Vehicle-mounted Methane Inspection Instrument

多次反射腔体是激光吸收光谱气体传感器的核心组件,其结构和性能直接影响到整个设备的灵敏度和稳定性.分析了White腔、Herriott腔、CEAS腔等国内外主要应用的多次反射腔体的设计方案和工作原理,设计和制作了96次反射腔体,并应用在车载激光甲烷巡检仪上.通过燃气公司的实际应用表明,该设备极大地提高了燃气巡检的效率,缩短了燃气巡检的周期,有效地减少了爆燃事故的发生.

Multiple-pass cell is the core component of the laser absorption spectrum gas sensor, and its structure and performance directly affect the sensitivity and stability of the whole device. This paper analyzes the design scheme and the working principle of the mainly used multiple pass cells both at home and abroad, such as White cell, Herriott cell, CEAS cell etc.. This papers also designs and manufactures a 96 times cell, and applies it in a vehicle-mounted laser methane inspection instrument successfully. The practical application of the gas company shows that the instrument greatly improves the efficiency of gas inspection, shortens the period of gas pipeline inspection, effectively reduces the occurrence of deflagration accident.