Double light source double sensitive element infra-red multiple gas detection sensor

Abstract

The invention relates to a birefringence source double sensitive component infrared multi-gas inspecting sensor, which comprises two infrared light emitting diodes, an infrared detector, an air chamber, a reflecting mirror and a metal strainer. The air chamber is a tube shape, and the bottom is a concave spherical surface and the middle part is a column surface. The metal strainer is connected with the top end nozzle of the air chamber, a reflecting mirror is equipped on the rear part of the metal strainer, and the inner surface of the reflecting mirror is a paraboloid. The infrared light emitting diodes and the infrared detector are in the same surface on the bottom of the air chamber, and the infrared light emitting diodes and the infrared detector are distributed symmetrically on the two sides of the center line of the air chamber. The infrared detector is composed of a tube-shaped casing, an infrared sensitive component, a light separating plate, a color absorber and a window. Composed with the prior infrared gas sensor, the invention is prominently characterized in that the non-isolated-type reflecting air chamber is designed and the detecting principle of the birefringence source double sensitive component is adopted, the mismatch of the prior infrared double detector gas sensor detecting component is solved, and the volume is reduced and the survey precision is greatly enhanced.

Description

technical field [0001] The invention relates to the technical field of gas concentration detection sensors, and is an infrared multi-gas detection sensor with dual light sources and dual sensitive elements. Background technique [0002] The intensity of a beam of infrared light will decrease when passing through a gas container. The intensity loss is a function of the number of active gas molecules in a certain volume, which is a function of the gas concentration. Combined with the fact that the interaction of gases with infrared light occurs only at specific wavelengths of infrared light, an instrument can be designed to measure the concentration of a specific gas. Infrared analyzer is a physical analysis instrument made according to the principle of gas absorption of infrared rays. Generally speaking, infrared analyzers can measure continuously, and have a wide measurement range, high precision, high sensitivity, and good selectivity. Previous infrared gas analyzers are ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of low precision and large volume of the existing infrared gas sensor, and provide a high-precision dual light source, dual sensitive element infrared multi-gas detection sensor with double light source, double sensitive element and open gas chamber structure

Images