Single-beam NDIR (non-dispersive infrared) gas sensor and miner helmet provided with same

Abstract

The invention discloses a single-beam NDIR (non-dispersive infrared) gas sensor and a miner helmet provided with the same. The single-beam NDIR gas sensor is used for detecting the concentration of gas to be detected, can ensure stable output for a long time, and has the advantages of small size and low manufacture cost. Therefore, the single-beam NDIR gas sensor and the miner helmet provided with the same are particularly suitable for methane and vapor monitoring during underground mine exploitation process, and can effectively prevent methane explosion and / or flood risk in an underground mine.

Description

technical field [0001] The invention relates to a single-beam non-dispersive infrared gas sensor, which is mainly used for detecting and warning dangerous gas conditions in mines, and belongs to the gas application field. [0002] The invention also relates to a miner's helmet using the above-mentioned single-beam non-dispersive infrared gas sensor. Background technique [0003] In recent decades, non-dispersive infrared (NDIR) detection technology has gradually been applied in gas detection in the gas analysis industry. The working principle of non-dispersive infrared detection technology is the spectral absorption method: the gas concentration is detected by detecting the change of the gas transmitted light intensity or reflected light intensity. Each gas molecule has its own absorption (or radiation) spectrum characteristics. The emission spectrum of the light source only absorbs in the part that overlaps with the gas absorption spectrum. The light intensity after absorp...

AI Technical Summary

Problems solved by technology

[0007] However, the gas sensors currently used, even the non-dispersive infrared gas sensors based on non-dispersive infrared detection technology, are not very reliable in quality, and output drift often occurs after a period of use. Therefore, in order to ensure the non-dispersive infrared gas sensor The measurement accuracy and sensitivity of dispersive infrared gas sensors often require recalibration and maintenance services every six months or a year, which increases the cost of use;

[0008] Second, the size of the existing non-dispersive infrared gas sensor is too large

[0010] Third, the cost of existing non-dispersive infrared gas sensors is too high

However, NDIR gas sensors are still too expensive to use as gas monitoring tools in miners' mining processes; for this purpose, the individual production costs of NDIR methane or dew point (water vapor) gas sensors must be reduced. to under $10

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