Sensitive probe and non-dispersed infrared gas sensor detection system

Abstract

The invention discloses a sensitive probe for a non-dispersed infrared gas sensor and a non-dispersed infrared gas sensor detection system. The sensitive probe comprises an infrared light source, an optical air chamber, an infrared sheet array and an infrared detector array; the optical air chamber is provided with an air inlet and an air outlet respectively and is communicated with a gas environment to be measured through the air inlet and the air outlet; the infrared light source is arranged at the head end of the optical air chamber; the infrared sheet array and the infrared detector arrayare sequentially arranged at the tail part of the optical air chamber; the infrared sheet array comprises a plurality of detection light filters and a contrast light filter; the infrared detector array comprises a plurality of infrared detectors which correspond to the detection light filters and the contrast filter one by one; and after the infrared light source emits broad spectrum infrared light, the broad spectrum infrared light sequentially passes through the optical air chamber and the infrared sheet array and then exits into the infrared detector array. The sensitive probe provided by the invention, by using the infrared sheet array and the infrared detector array, can simultaneously measure various gas concentrations.

Description

technical field [0001] The invention belongs to the technical field of non-spectral infrared sensors, and in particular relates to a sensitive probe for non-spectral infrared sensors capable of detecting multi-gas concentrations. Background technique [0002] With the development of natural gas detection, the demand for multi-gas monitoring is also increasing. Gas detection technology is also widely used in life and production, specifically focusing on coal mine gas monitoring systems, fire detection systems, industrial processes, air quality monitoring, etc. The sensors used to detect the gas concentration in industrial processes mainly include the following types: one is the catalytic combustion gas sensor, under the action of the catalyst, the flammable gas undergoes a combustion reaction under a certain temperature condition, and the resistance temperature rises during combustion, and the resistance changes. , the change value is a function of the concentration of the g...

AI Technical Summary

Problems solved by technology

However, the commonly used non-spectral infrared gas sensors can only detect the concentration of a single gas during the gas detection process, and for the measurement of multiple gases, it is necessary to use a Fourier analyzer and multiple semiconductor lasers with different wavelengths, or It can only be completed by switching multiple filters, and its detection system is not only complex in structure, but also bulky

At the same time, the sensitivity of the traditional NDIR system is affected by the sensitivity of the detector, the noise infrared source, and the optical path between the infrared source and the detector, and there are problems such as a high detection limit

Images