Multi-gas concentration detection device, manufacturing method thereof and alarm device

Abstract

The invention provides a multi-gas concentration detection device, a manufacturing method thereof and an alarm device. The multi-gas concentration detection device comprises a reflection gas chamber,a mid-infrared light source, light filters and a multi-channel detector; a first through hole and a second through hole are formed in the reflection gas chamber; the mid-infrared light source is inserted into the first through hole; the light filters at least comprise a reference light filter, a first light filter and a second light filter; the multi-channel detector at least comprises a referencechannel, a first channel and a second channel which are all located on the same plane and face the second through hole; the reference light filter covers the light inlet of the reference channel; thefirst light filter covers the light inlet of the first channel; the second light filter covers the light inlet of the second channel; and light emitted by the mid-infrared light source is gathered into the reference channel, the first channel and the second channel through the reflection air chamber. The multi-gas concentration detection device can synchronously detect the concentrations of various gases and mixed gases thereof.

Description

technical field [0001] The invention relates to the technical field of gas concentration monitoring, in particular to a multi-gas concentration detection device, a manufacturing method thereof, and an alarm device. Background technique [0002] In recent years, with the rapid development of my country's economy and the continuous acceleration of urbanization, the problem of environmental pollution has become increasingly severe. Among them, atmospheric environmental pollution has brought a great impact on our production and life, and gas pollution such as industrial waste is the top priority of current atmospheric environmental monitoring and governance. For example, nitrogen oxides, sulfides and other gases emitted in industrial processes are likely to produce acid rain, which leads to soil acidification and damage to agricultural production; hydrocarbons and carbon oxides emitted in automobile exhaust are greenhouse gases, which aggravate the greenhouse effect and threaten...

AI Technical Summary

Problems solved by technology

However, at present, most of the domestic research in this field is in the laboratory research stage, and no mature products have been launched on the market.

[0004] At present, most of the infrared gas sensor products launched abroad are only effective for a single type of gas based on the strong selectivity of gas infrared absorption.

However, in the actual industrial application environment, it is often necessary to perform multi-parameter sensing and measurement of various mixed gases at the same time, and the use of multiple types of gas sensors will greatly increase the industrial cost and the complexity of the system

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