Device for optically detecting gas

[0023] Such as figure 1 As shown, this embodiment provides a gas identification method, the steps are:

[0024] 1) Turn on the two broadband laser beams and the detector so that the device elements are in a stable state.

[0025] 2) Open the gas path control device, and let methane gas flow into the slit 6. The methane gas enters the sensor from the Gas in end and exits from the Gas out end.

[0026] 3) At the same time, adjust the micromirror 3 and adjust the optical path so that the characteristic frequency interferes just at the detector, forming a characteristic spectrum to be detected by the detector.

[0027] 4) Algorithm conversion is performed between the obtained characteristic interference spectrum and the established standard library to identify methane gas molecules and their corresponding concentrations.

[0029] Such as figure 1 As shown, this example provides a gas identification method, the steps are:

[0030] 1) Turn on four broadband laser beams and detectors so that the device elements are in a stable state.

[0031] 2) Open the gas path control device, and let in the standard mixed gas of methane and ethylene. The mixed gas enters the sensor from the Gas in end and goes out from the Gas out end.

[0032] 3) At the same time, adjust the micromirror 3 so that various characteristic spectra interfere on the detector in turn, forming multiple groups of characteristic spectra to be recognized by the detector.

[0033] 4) Algorithm conversion is performed between the obtained characteristic interference spectrum and the established standard library to identify methane and ethylene gas molecules and their respective concentrations.