Four-path gas component measurement pyroelectric infrared detector

A pyroelectric infrared and gas composition technology, which is applied in measuring devices, material analysis through optical means, instruments, etc., can solve the problems of using stains to affect the optical path, low detection rate, weak signal output, etc.

Inactive Publication Date: 2016-09-28
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0005] Nowadays, most of the domestically known infrared pyroelectric detectors are single-channel infrared pyroelectric detectors, while the research on multi-channel infrared pyroelectric detectors is less, and most of them are traditional linear structures with several parallel channels. The structure is relatively simple, the detection rate is low, and the signal output is weak, especially in the N

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  • Four-path gas component measurement pyroelectric infrared detector

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[0019] The principles and features of the present invention will be described in detail below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, not to limit the present invention.

[0020] Such as figure 1 Shown is an embodiment of the present invention: a four-channel pyroelectric infrared detector for measuring gas components includes a detector housing, a spectroscopic array 3 disposed in the housing, capable of receiving a light source, and four detection units, a single detection unit It includes a piece of pyroelectric crystal sheet 1 and a piece of narrow-band infrared filter 2; wherein, a light-through hole is provided on the detector housing, a light-splitting array 3 is located directly below the light-through hole, and the four detection units are inclined inward Set in the four light splitting directions of the light splitting array 3, and the four pyroelectric crystal sheets 1 are respectively per...

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Abstract

The invention discloses a four-path gas component measurement pyroelectric infrared detector, and belongs to the technical field of pyroelectric detector electronics. The pyroelectric infrared detector comprises a detector housing with a light passing hole, a light splitting array arranged in a shell and capable of receiving a light source and four detection units, wherein each detection unit comprises a pyroelectric crystal plate and a narrowband infrared optical filter; the light splitting array is a square light splitting array formed by combining n<2> micro-pyramidal specular light splitting units. According to the pyroelectric infrared detector, a miniature specular surface technology is adopted, and multiple array light splitting units are arranged in the detector as light splitters, so that the problems of mechanical expansion, aging effects, stains and the like of a non-dispersive infrared technology are problems, and the proportion of light beams of each path can be kept equal to realize a stable signal proportion; by a reasonable design, multiple gases can be synchronously analyzed, and more accurate measurement can be implemented through different absorption wavebands of different gases.

Description

technical field [0001] The invention relates to the technical field of pyroelectric detector electronics, in particular to a pyroelectric infrared detector with four channels for measuring gas components. Background technique [0002] Gas detection instruments are used in a wide range of fields, covering industrial and agricultural production, environmental quality monitoring, national defense, aerospace, family life and other fields. Infrared gas detection instrument is one of the mainstream gas detectors today. Infrared gas detection technology is a non-direct contact real-time monitoring gas detection technology with strong selectivity, stable performance, high sensitivity, large dynamic measurement range, and equipment It has the advantages of little external interference and long service life. It has irreplaceable advantages in monitoring flammable and explosive gases and carbon dioxide gas, so it has received more and more attention. [0003] Infrared detector is a p...

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Application Information

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IPC IPC(8): G01N21/3504G01N21/01
CPCG01N21/3504G01N21/01
Inventor 梁志清刘子骥马振东王涛蒋亚东
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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