For the problem of low detection stability

which the spectrum analyzer with traditional mechanical structure in the field of work affected by the environment

a lateral shearing interferometer system was designed.For the characteristics of the data acquisition and spectral analysis

the spectrum analysis software and its vibration error elimination algorithm were designed

and a spectral analysis software was prepared which could be used for the detection of gas concentrations by VC.Experiments on the standard concentration of methane gas

and compared with test data of WQF530 spectrometer.Experimental results show that the spectrum analysis software of lateral shearing interferometer system invert spectrum data in a static environment

and the measurement error of the gas concentration of the WQF530 spectrometer and the lateral shearing interferometer is about 0.50%

in environment of vibration interference

the system accuracy is significantly higher than WQF530 spectrometer

and spectrum analysis algorithms and software of the system is stable.