Multiple-gas detector

Abstract

The invention discloses a multiple-gas detector. The detector comprises an optical filter disc, wherein the optical filter disc is provided with even optical filters which are equidistantly distributed, the two adjacent optical filters in the optical filters are an optical filter pair, and each optical filter pair is used for detecting different gas molecules. Each optical filter pair comprises afirst optical filter corresponding to a characteristic absorption peak of the gas molecules to be detected and a second optical filter corresponding to a wave band which is not absorbed by the gas molecules to be detected. The detector has advantages that the multiple-gas detector is formed by a single wide-spectrum light source and a single corresponding detector; and the single detector can makea system approach an ideal differential signal processing model, which is beneficial to the increase of detection accuracy. The detector is especially suitable for occasions where detection accuracyis high and multiple gas concentrations need to be detected.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a multi-gas detector, in particular to a non-spectral infrared multi-gas detector. Background technique [0002] A gas detector is an instrumentation tool for gas leakage concentration detection, mainly referring to a portable / handheld gas detector. Gas sensors are mainly used to detect the types of gases existing in the environment. Gas sensors are sensors used to detect the composition and content of gases. It is generally believed that the definition of gas sensors is based on the classification of detection targets, that is to say, any sensor used to detect gas composition and concentration is called a gas sensor, regardless of whether it uses physical methods or chemical methods. [0003] There are many defects in the traditional gas detectors. First, the gas detectors based in the School of Chemistry are poisoned after a certain period of use, resulting in a short service ...

AI Technical Summary

Problems solved by technology

[0003] There are many defects in the traditional gas detectors. First, the gas detectors based in the School of Chemistry are poisoned after a certain period of use, resulting in a short service life of the sensors; second, the gas detectors based on incandescent lamps or other light sources have The disadvantages of high power consumption and short life are not conducive to handheld use; third, traditional gas detectors can only detect a single gas, and when multiple gases need to be detected, multiple instruments need to be used, which is wasteful and cumbersome

Images