摘要
基于可调谐半导体激光吸收光谱技术,在1653 nm波段结合波长调制光谱吸收技术(WMS),使用光程为14 m长的Herriott型多光程池组成了气体检测系统,并通过此系统在常温常压的条件下,对CH4进行测量实验,其中拟合决定系数为0.998.为了分析压强对二次谐波信号的影响,通过此系统测量了不同压强对应的二次谐波信号,将二次谐波信号幅值与压强进行线性拟合,线性关系良好.通过二次谐波过零点间距的解析式计算得到被测气体压强,并通过拟合公式实现无需压力传感装置的压强补偿功能,在负压情景下的工业测量具有较广泛的应用前景.
Based on tunable semiconductor laser absorption spectroscopy technology,combined with wavelength modulated spectral absorption technology(WMS)in the 1653 nm wavelength band,a gas detection system was composed of a Herriott type multi path cell with an optical path length of 14 m.Through this system,CH4 was measured under normal temperature and pressure conditions,with a fitting determination coefficient of 0.998.In order to analyze the influence of pressure on the second harmonic signal,this system was used to measure the second harmonic signals corresponding to different pressures.The amplitude of the second harmonic signal was linearly fitted with the pressure,and the linear relationship was good.The pressure of the measured gas is calculated using an analytical formula for the zero crossing distance of the second harmonic,and the pressure compensation function without the need for a pressure sensing device is achieved through a fitting formula.This has a wide range of application prospects in industrial measurement under negative pressure scenarios.
作者
朱傲
孟腾飞
武海东
ZHU Ao;MENG Tengfei;WU Haidong(School of Computer Science and Technology,Taiyuan Normal University,Jinzhong Shanxi 030619,China;Department of Physics,Taiyuan Normal University,Jinzhong Shanxi 030619,China)
出处
《太原师范学院学报（自然科学版）》
2024年第1期71-75,共5页
Journal of Taiyuan Normal University:Natural Science Edition
基金
山西省高等学校科技创新项目(2020L0519).
关键词
气体检测系统
吸收光谱技术
二次谐波信号
压强补偿
gas detection system
absorption spectroscopy technology
second harmonic signal
pressure compensation
