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Non-Spectral Infrared Gas Sensors

A gas sensor and non-spectral infrared technology, applied in the field of sensors, can solve the problems of slow gas diffusion, affecting response time, light leakage, etc., and achieve the effect of wide application range and improved signal-to-noise ratio

Active Publication Date: 2020-11-10
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the opening of the air hole is large, it will lead to the confinement performance of the cavity on the light, and the light leakage will be serious; if the air hole is opened small, it will cause the gas to diffuse very slowly, seriously affecting the response time

Method used

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  • Non-Spectral Infrared Gas Sensors

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Embodiment Construction

[0034] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0035] see figure 1 , figure 1 A schematic structural diagram of a non-spectral infrared gas sensor provided in an embodiment of the present invention, the sensor includes:

[0036] A light emitter (10), a light concentrator (20) and a light receiver (30).

[0037] The light emitter (10) is used for emitting infrared light. Specifically, ...

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Abstract

The invention discloses a non-dispersed infrared gas sensor. The non-dispersed infrared gas sensor is applied to the technical field of sensors and comprises a light emitter (10), a light condenser (20) and a light receiver (30); the light emitter (10) is used for emitting infrared light, a light condensing part (21) is arranged in the light condenser (20), and comprises two light condensing centers, and the light condenser (20) is used for condensing the infrared light to the two light condensing centers; the light receiver (30) is used for receiving two infrared light beams which are formedby condensing of the two light condensing centers, and the infrared light emitted by a light source is condensed to the two light condensing centers and enters the light receiver. Compared with a traditional method of condensing the light to one light condensing center, the signal-to-noise ratio of the sensor is increased, and meanwhile, the application range is wide.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a non-spectral infrared gas sensor. Background technique [0002] The non-dispersive infrared (NDIR) gas sensor uses a wide-spectrum light source as the light source of the infrared sensor. The light passes through the measured gas in the optical path, passes through a narrow-band filter, and reaches the infrared detector. Its working principle is based on the characteristics of different gas molecules absorbing infrared light of specific wavelengths, using the relationship between gas concentration and absorption intensity (Lambert-Beer law) to identify gas components and determine their concentration. With the development of infrared light source, sensor and electronic technology, non-dispersive infrared (NDIR) gas sensor has been developed rapidly at home and abroad. [0003] However, the existing non-spectral infrared gas sensor uses a gas chamber to make the infrared light ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3504
CPCG01N21/3504
Inventor 王永杰钱利滨施安存李芳
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI