NDIR (Non-Dispersive Infra-Red) gas sensor

A gas sensor and gas technology, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of increased manufacturing cost and increased volume

Active Publication Date: 2014-05-28
中科芯未来微电子科技成都有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the optical cavity of the existing NDIR gas sensor generally adopts a straight cavity, and the increase of the optical path by increasing the overall size of the straight cavity leads to an increase in volume and an increase in manufacturing cost

Method used

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  • NDIR (Non-Dispersive Infra-Red) gas sensor

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Embodiment Construction

[0027] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Example. It can be understood that the specific embodiments described here are only used to explain the present invention, rather than limit the present invention. Based on the embodiments of the present invention, all those skilled in the art can obtain without creative work. Other embodiments all belong to the protection scope of the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0028] see figure 1 , figure 2 , figure 1 A schematic structural diagram of an NDIR gas sen...

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Abstract

The invention provides a NDIR (Non-Dispersive Infra-Red) gas sensor. The gas sensor comprises an infrared light source, a cylindrical optical cavity, an infrared detector and a circuit component, wherein the cylindrical optical cavity is used for containing the gas to be detected, air-vents are formed in the upper end surface and/or lower end surface of the cylindrical optical cavity, and the air-vents are used for allowing the to-be-detected gas to be in and out of the cylindrical optical cavity; the infrared light source, a reflecting mirror and the infrared detector are arranged in the cylindrical optical cavity; the reflecting mirror is used for receiving and reflecting infrared light emitted by the infrared light source, and the infrared detector is used for detecting the infrared light reflected by the reflecting mirror in the cylindrical optical cavity; the circuit component is connected with the infrared detector, and is used for obtaining the concentration of the gas to be detected according to the infrared light detected by the infrared detector, so that the reduction of the volume is realized, the reduction of the cost is realized, and the increase of the optical path is realized, thereby improving the performance of the sensor.

Description

technical field [0001] Embodiments of the present invention relate to gas detection technology, in particular to an NDIR gas sensor. Background technique [0002] With the progress of human society and the development of science and technology, carbon dioxide (CO 2 ) and other gases have changed greatly, and pose a certain threat to people's health; at the same time, in industrial production, methane (CH 4 ), carbon monoxide (CO) and other gases have higher requirements for detection and control of the concentration, therefore, gas sensors for detecting gas concentrations have emerged as the times require. [0003] At present, the gas sensors used for gas concentration detection mainly include electrochemical type, semiconductor type, solid electrolyte type, optical type, and polymer type. Among them, the non-dispersive infrared (Non-dispersive infrared, NDIR) gas sensor in the optical type has better comprehensive performance. With the development of infrared light source...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504
Inventor 张文博欧文明安杰张海苗张宇张乐
Owner 中科芯未来微电子科技成都有限公司
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