Four-path gas component measurement pyroelectric infrared detector

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...

AI Technical Summary

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 NDIR system, due to problems such as mechanical expansion, aging effects, and use of dirt, which will affect the optical path, resulting in unequal ratios of beams entering the interior of the multi-channel structure infrared detector for a single channel unstable signal

Therefore, the multi-channel structural infrared detectors of the prior art have certain limitations in application field and accuracy.

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