Gas detection method and apparatus

Abstract

The invention relates to a gas detection method. The gas detection method comprises the following steps: B) irradiating to-be-detected gas with infrared light so as to obtain infrared reflected light obtained after reflection of the infrared light by the to-be-detected gas; C) converting the infrared reflected light into a characteristic signal of the infrared reflected light; D) comparing the characteristic signal of the infrared reflected light with standard signals to standard gas under the condition of two grades of standard concentrations so as to determine whether the to-be-detected gas contains gas varieties in the standard gas or not, wherein if the to-be-detected gas contains at least one gas variety in the standard gas, the concentration of the gas variety, in the to-be-detected gas, identical to the gas variety the standard gas; and E) visually outputting the determined gas variety in the to-be-detected gas and the concentration thereof. The invention also relates to a gas detection apparatus using the method.

Description

[0001] The present invention claims the priority of the Chinese patent application number "201510033084.3" submitted on January 22, 2015, and the patent application titled "a gas detector and its use method". technical field [0002] The invention relates to a gas detection method and gas detection equipment, in particular to a portable infrared gas detection method and equipment that can be used for leakage detection of various inflammable, explosive and toxic gases. Background technique [0003] Most of the raw materials, intermediate products, and products used in the chemical production process are flammable, explosive, toxic and harmful substances. In order to avoid harm to the human body and the environment, these flammable, explosive, toxic and hazardous substances are generally converted from raw materials to products in closed containers, reactors and other equipment. In addition, from one operation unit to another operation The transportation of various gas, liquid...

AI Technical Summary

Problems solved by technology

Due to the strong specificity of this type of sensor, it is only suitable for one or a certain type of substance, and does not generate a response signal for other leakage sources, so the versatility is poor

In addition, due to the limitation of external power supply and signal output mode, such sensors generally need to be fixed at a certain position of the production device, but due to the uncertainty of the actual location of the leakage point, and the influence of the leakage material on the atmosphere flow, building structure, and shelter structure The diffusion channel and diffusion range are also uncertain, so it is difficult for a fixed-installed detection sensor to be within the diffusion range of the leaked substance, so false positives and false negatives are often caused.

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