Water Vapor Detection System Based on Scanning Spectra  

作　　者：Shicong ZHANG Qiang WANG Yan ZHANG Fujun SONG Kun CHEN Guoqing CHOU Jun CHANG Pengpeng WANG Delong KONG Zongliang WANG Weijie WANG Yongning LIU Haiyong SONG 

机构地区：[1]School of Information Science and Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, 250100, China [2]School of Shandong Provincial Party Committee of Communist Party of China, Jinan, 250021, China

出　　处：《Photonic Sensors》2012年第1期71-76,共6页光子传感器（英文版）

基　　金：This work was supported by Natural Science Foundation of China （60977058）, Science Fund for Distinguished Young Scholars of Shandong Province of China （JQ200819）, Research Award Fund for Outstanding Middle-aged＇ and Young Scientist of Shandong Province of China （2007BS08003）, Independent Innovation Foundation of Shandong University （IIFSDU2010JC002）.

摘　　要：Scanning the absorption spectral line of water vapor through wavelength around 1368.597nm is successfully used to measure the value of micro-moisture content. The synchronous superposition average of original signal algorithm based on labview is innovated and applied to detecting weak spectrum absorption signal instead of low pass filter. Two data processing methods are used to get the concentration of water vapor in ppm： one is a general formula method which has newly deduced a general formula to calculate the concentration of gas with temperature and beam intensity ratio when the pressure is equal to or greater than 1 atm; the other is engineering calibration method which is proved to have high resolution and accuracy with the fitted curve of beam intensity ratio and concentration in ppm when the temperature changes form 258K to 305K and the pressure ranges from 1 atm to 5 atm.

关 键 词：Water-vapor detection scanning spectra detecting under high gas pressure near-infrared absorption 

分 类 号：TN253[电子电信—物理电子学] TP274[自动化与计算机技术—检测技术与自动化装置]