Application of threshold stochastic resonance in low concentration gas detecting
Tong Ji-ju · Journal of Zhejiang University(Engineering Science) · 2015
A low concentration gas detecting method based on threshold stochastic resonance(SR)was proposed.The raw data was pre-processed to satisfy the requirements of SR system and put into theone level threshold detector.Then the cross-correlation coefficient,which reflected the similarities between the input signal and the output signal,was used to evaluate the performance of SR system.Then the threshold parameters were optimized and the relationship between the maximum cross-correlation coefficient and gas mass concentration was analyzed.Experimental results show that threshold SR can be observed and the maximum cross-correlation coefficient increases with the increase of gas mass concentration.The maximum cross-correlation coefficient can be used to detect the gas mass concentration and the detectable limit can beμg/L level.