Portable infrared semiconductor laser absorbing type gas detection method and detection apparatus therefor

Abstract

Disclosed is an absorption mash gas detecting method for of portable infrared semi-conductor laser, which comprises: employing infrared laser of 1.33ª

Description

technical field [0001] The invention relates to a portable infrared semiconductor laser absorption type gas detection method and device, which belongs to the laser detection technology category and is used for on-site detection of gas concentration in coal mines. Background technique [0002] Methane is the main part of flammable and explosive gases and various fuels. The lower limit of explosion in the atmosphere is 4.9% and the upper limit is 15.4%. Methane explosion has always been one of the important disasters in coal mines. In order to prevent explosion accidents, the surrounding Early safety detection of gas is very necessary. Timely detection of the volume fraction of methane gas plays a very important role in the safe operation of industrial mines and personal safety. [0003] The infrared gas sensor has the advantages of high detection accuracy, suitable for a wide concentration range and long service life, and will gradually replace the previous gas detectors. ...

AI Technical Summary

Problems solved by technology

[0005] 1. The size of the necessary gas chamber for collecting gas samples is too large (generally 0.5 meters), which is not convenient for the staff to carry and detect the concentration of methane gas in real time;

[0006] 2. This type of sensor needs to be adjusted frequently, and its reliability and stability are poor

Therefore, this type of light source cannot be miniaturized due to the limitations of the stability of the infrared light source and the energy consumption and volume of the source.

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