Photonic Sensors, 2012, 2 (1): 71, Published Online: Oct. 24, 2013
Water Vapor Detection System Based on Scanning Spectra
Water-vapor detection scanning spectra detecting under high gas pressure near-infrared absorption measurement technology ha
Abstract
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 1atm; 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 1atm to 5 atm.
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. Water Vapor Detection System Based on Scanning Spectra[J]. Photonic Sensors, 2012, 2(1): 71.