Non-dispersive infrared gas sensor and operation method thereof

Abstract

The invention relates to a gas chamber structure of a non-dispersive infrared gas sensor. The gas chamber structure comprises a gas chamber casing, a transmitting terminal and a receiving terminal, wherein the transmitting terminal and the receiving terminal are connected with two ends of the gas chamber casing, the gas chamber casing is provided with an inlet hole and an outlet hole on the side wall, the transmitting terminal is provided with an infrared light source and a mechanical chopping device arranged in the front of the infrared light source, and the receiving terminal is provided with a high-frequency response infrared detector. The invention further relates to the non-dispersive infrared gas sensor and an operation method thereof. The sensor comprises the gas chamber structure,an inlet joint, an outlet joint, a master control board, an alarm, a display and a gas concentration output interface, wherein the inlet joint and the outlet joint are respectively connected with thegas chamber structure through gas pipes, the master control board is connected with the transmitting terminal and the receiving terminal of the gas chamber through electric cables, the alarm, the display and the gas concentration output interface are connected with the master control board. The mechanically modulated infrared light source and the high-frequency response heat release electric detector are adopted and the whole sensor is of the modular design technically; the gas chamber structure refers to the general straight gas chamber structure; thus, difficulty in production process is low, and capacity in resisting bad environmental influence is high.

Description

technical field [0001] The invention relates to the technical field of optoelectronics and micro-electromechanical systems, in particular to a non-spectral infrared gas sensor and its operating mode, which can be applied to the detection and analysis of toxic and harmful gases and volatile liquid hazardous chemicals in the field of cyclization. Background technique [0002] Our country is currently facing a severe drug situation. The international drug wave is rampant, the countries and regions involved in drugs continue to expand, and the sources, types, production, and number of drug users of drugs continue to increase. From a technical perspective, with the rapid development of science and technology, chemically synthesized drugs will become the most widely abused drugs in the world. It can be asserted that many new drugs that will come out in the future will all rely on chemicals as raw materials and ingredients. The emergence of chemically synthesized drugs has had an...

AI Technical Summary

Problems solved by technology

[0017] In order to overcome the technical problem of low detection sensitivity of the non-spectral infrared gas sensor in the prior art due to the use of electrically modulated infrared light sources and low-frequency response pyroelectric detectors, the present invention proposes a non-spectral infrared gas sensor, which It adopts mechanically modulated infrared light source and high-frequency response pyroelectric detector, adopts modular design in terms of technical equipment, and its gas chamber structure adopts ordinary straight gas chamber structure. The production process is less difficult and the ability to resist harsh environmental influences is better. Strong, can avoid and solve the technical problems of difficult mass production process and poor ability to resist harsh environmental influences brought about by the design of the ellipsoidal air chamber structure

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