Active gas detection method and alarm device thereof

Abstract

The invention relates to an active gas detection method and an alarm device thereof. An infrared receiving device and an infrared generating device are arranged in an area to be measured and used for detecting the condition that infrared signals are absorbed in the air and measuring the concentration of target gas to be measured corresponding to the wavelength by analyzing the intensity of the absorbed wavelength; the active gas detection alarm device comprises an infrared transmitting device, an infrared receiving device, an alarm device and a central control module; both the infrared receiving device and the infrared generating device are arranged in the area to be measured, correspond to each other and are respectively connected with the central control module; and the alarm device is connected with the central control module. Compared with the traditional point-type detection method, the average concentration represented by the measuring result obtained by the measuring method is more reasonable.

Description

technical field [0001] The invention relates to a gas concentration detection and alarm system, in particular to an active gas detection method for detecting the concentration of combustible gas in an explosive gas environment and capable of alarming and an alarm device using the method. Background technique [0002] At present, in some places with dangerous gas or dangerous gas leakage hazards, in order to ensure the safety of people nearby, people usually install devices for detecting dangerous gases in these areas and devices that can alarm to monitor dangerous gases and concentrations. When there is a dangerous gas leakage or the concentration of dangerous gas exceeds a certain dangerous concentration value, the sound and light signals for danger warning are issued to remind people to take precautions. The gas detection devices used in common gas detection and alarm devices are all passive. Detection method, this kind of gas detection device is fixed at a fixed position,...

AI Technical Summary

Problems solved by technology

[0002] At present, in some places with dangerous gas or dangerous gas leakage hazards, in order to ensure the safety of people nearby, people usually install devices for detecting dangerous gases in these areas and devices that can alarm to monitor dangerous gases and concentrations. When there is a dangerous gas leakage or the concentration of dangerous gas exceeds a certain dangerous concentration value, the sound and light signals for danger warning are issued to remind people to take precautions. The gas detection devices used in common gas detection and alarm devices are all passive. Detection method, this kind of gas detection device is fixed at a fixed position, and it must be installed in the explosion-proof device, by sucking the outside gas into the explosion-proof device for explosion-proof, so as to detect the existence and concentration of dangerous gas Range, this fixed-point passive detection method is not only slow, but also easy to cause blockage of the filter system during the inhalation process, and the detection method of several detection devices in a large space will also lead to relatively one-sided results , cannot correctly reflect the concentration of dangerous gases in the detected space

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