一种带有声滤波器的无窗共振光声池的设计

DESIGN AND PERFORMANCE OF A WINDOWLESS RESONANT PHOTOACOUSTIC CELL EQUIPPED WITH ACOUSTIC FILTERS

本文报道了一种适合于大气污染物连续检测的带有声滤波器的无窗共振光声池.这种无窗池解决了由于窗口吸收而限制光声方法检测灵敏度的问题.同时由于声滤波器的作用,它对外部噪声不敏感,实验结果与理论计算相符。

A windowless resonant photoacoustic cell equipped withacoustic filters is described for continuous air pollution detection.Theproblem of absorption caused by window materials which limits thesensivity of photoacoustic method is solved by windowless design.Thecell is insensitive to external noise with the help of acoustic filters.Experimental results are in good agreement with the theoreticalcalculation.