Research of Methane Measurement Based on Spectrum Absorption Technology

According to the disadvantages of the methane sensor in coal mine recently,double light beam and single wavelengths methane concentration detector was designed using differential absorption technology.voltage of detector was Measured with different gas concentration in Laboratory environment,from which fitting curves of the voltage and gas concentration can be Obtained,Experiment shows that measurement error is less than 2.5%,and the system has very high measurement precision which can meet the requirements of the methane concentration detection in coal mine.