Portable infrared gas alarm apparatus

Abstract

The invention relates to the field of gas detection, in particular to a portable infrared gas alarm apparatus. The alarm apparatus solves the problems that the sensitivity and accuracy of the existing infrared gas detection device can not reach ideal requirements and the like. The alarm apparatus comprises a detection unit and a signal processing circuit which are arranged in a box body that is provided with a function button, a display, an alarm device and an alarm indicator; the box body is also provided with a venthole which is opposite to the detection unit directly; the detection unit is a gas collector which is internally provided with an infrared light source and an infrared detector; the gas collector comprises a cylinder with a through hole arranged in the side wall, and end covers which are respectively fixed at the two ends of the cylinder; and the inner surface of the end cover is the surface of a concave mirror; the infrared light source and the infrared detector are respectively fixed with the inner surfaces of the two end covers by a supporting body and arranged at the focus positions of the concave mirror surfaces of the inner surfaces of the end covers. The detection unit has the advantages of simple, reasonable and compact structure, easy processing and convenient carryover; and the whole alarm apparatus has the advantages of high sensitivity, fast response speed, good stability, high measuring accuracy, and wide application range.

Description

technical field [0001] The invention relates to the field of gas detection, in particular to a portable infrared gas alarm device. Background technique [0002] The infrared detector (that is, the infrared sensor) used in the existing gas infrared detection device is realized by utilizing the characteristic that diatomic molecules or polyatomic molecules have specific absorption peaks for infrared light, that is, a certain gas only corresponds to absorbing a certain The infrared light energy at the wavelength band is called the specific infrared absorption peak of this gas. The specific absorption peaks of various gas gases do not interfere with each other, and the infrared light energy absorbed by the gas gas is the same as that of the gas in the infrared light irradiation area. Compared with the gas detection device implemented by other principles, it has the advantages of good stability, long service life, wide application range, and is not easy to be poisoned and aged by...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a portable infrared gas alarm device in order to solve the problems that the sensitivity and precision of the existing gas infrared detection device fail to meet the ideal requirements, and the volume is relatively large, and it is inconvenient to use and carry.

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