Improving the stability of Tunable Diode Laser Sensor for natural gas leakage monitoring
Abstract Tunable diode laser absorption spectroscopy(TDLAS) is a method of using a tunable diode laser scanning one of absorption lines of trace gas,this technique has advantage of high sensitivity,fast response,multi-component and non-contact measurement.We had already developed a TDLAS sensor for monitoring natural gas leakage during the natural gas production and the process of gathering and transportation in the natural gas station,but in the practical application we found that the TDLAS sensor was influenced by visibility changes.In order to overcome this interference and improve sensor stability,we present an automatic control circuit to process photoelectric signal for eliminating interference of visibility changes.Long-term monitoring results show that the concentration of CH4 are regular and stable during the natural gas production and transmission,therefore the application of the automatic gain circuit improved the stability of the TDLAS sensor.
Tunable diode laser absorption spectroscopy natural gas leakage automatic gain circuit stability
YOU Kun ZHANG Yu-jun WANG Li-ming LI Hong-bin HE Ying
Key Laboratory of Environment Optics and Technology of Chinese Academy of Sciences,Anhui Institute of Optics and Fine Mechanics,CAS Hefei Anhui,China
国际会议
郑州
英文
376-379
2013-10-19（万方平台首次上网日期，不代表论文的发表时间）