噪声对光声气体检测系统影响的研究

Researches on the Effect of Noise on Photoacoustic Gas Detection System

工作环境是影响光声气体检测系统的一个重要因素。实验发现,噪声对光声信号有很大的影响,导致甲烷气体浓度检测的不准确性。该文对不同甲烷气体浓度在有噪声和无噪声的情况下,测量光声信号的大小。通过对比,引入修正函数对在噪声情况下的光声幅值进行校正。实验表明了该方法切实可行。

Environment influence is an important factor in photoacoustic Spectroscopy gas detection system.The experiments show that the noise has a great influence on the Photoacoustic signal.The noise influences the accurate detection of the concen tration of methane gas.In this paper,We measure the size of the photoacoustic signals with different concentrations of methane gas in noise or not.By contrast,we introduce a function to correct the amplitude of photoacoustic in noise conditions.The ex perimental results show that this method is feasible.