基于二次谐波检测技术的智能瓦斯监测系统  

Intelligent Monitoring System of Gas Based on Second Harmonic Detection Technology

作　　者：谢国民[1] 池继辉[1] 付华[1] 

机构地区：[1]辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛125105

出　　处：《仪表技术与传感器》2011年第2期106-107,110,共3页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(50874059);教育部博士点项目(200801470003)

摘　　要：提出了一种基于光谱吸收原理的瓦斯检测方法,即二次谐波检测法。在瓦斯检测过程中,一次谐波作为误差反馈信号,将光源的波长精确的锁定在瓦斯气体的吸收峰值上,二次谐波信号用于检测气体浓度,利用二次谐波和一次谐波的比值来消除由于光源的不稳定和变化等所引起的检测误差,提高了瓦斯检测系统的可靠性,减少了安全隐患,在一定程度上,避免了矿井事故的发生。This paper proposed a kind of gas examination method,based on the spectral absorption principle,the second harmonic method.In the process of gas detection,it took the first harmonic as feedback signal.The wavelength of the light in the precise locked on the gas absorption peaks,it used the second harmonic signal to detect gas concentrution.It used the second harmonic and the first harmonic ratio to eliminate the error which caused by instability and changes of the illuminant,so it can improve the reliability of the gas detection system,reduce the unsafe hidden in a certain extent,and avoid the mine accidents.

关 键 词：瓦斯监测 光谱吸收 谐波检测 数据融合 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]