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Active circulating gas suction type infrared multi-light path gas concentration measurement device

A technology of gas concentration measurement and active circulation, which is used in measurement devices, material analysis by optical means, instruments, etc., can solve problems such as detector mismatch, and achieve the effect of expanding the collection range

Pending Publication Date: 2017-05-17
XIAN SILICON OPTOELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] (5) Mismatch problem of the detector
[0008] (6) The problem of real-time circulation between the interior of the detector and the environment
However, the single light source and dual detector design scheme still has the problem of detector mismatch.

Method used

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  • Active circulating gas suction type infrared multi-light path gas concentration measurement device
  • Active circulating gas suction type infrared multi-light path gas concentration measurement device
  • Active circulating gas suction type infrared multi-light path gas concentration measurement device

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Embodiment Construction

[0035] The invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it is not used as a basis for any limitation on the invention.

[0036] like figure 1 As shown, an active circulation suction type infrared multi-optical path gas concentration measurement device includes a multi-circulation suction chamber and an infrared multi-optical path optical system. in:

[0037] The multi-cycle suction chamber includes an air intake hole 1 arranged on the suction chamber, an air suction pump 2 connected to the air intake hole 1, and an air flow chamber 3 corresponding to the air suction pump 2, and air is sucked at the end of the air flow chamber 3 An air outlet 4 is provided on the chamber, and a filter device 5 is communicated with one side of the air flow chamber 3 . The infrared multi-optical optical system includes a circulation chamber 7 connected to the filter device 3, and the infrared multi-optical path gas measurin...

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Abstract

The invention discloses an active circulating gas suction type infrared multi-light path gas concentration measurement device, which comprises a multi-circulation gas suction chamber and an infrared multi-light path optical system; the multi-circulation gas suction chamber comprises a gas inlet arranged on the gas suction chamber, a gas suction pump communicating with the gas inlet, and a gas flow cavity corresponding to the gas suction pump, the gas suction chamber is provided with a gas outlet at the tail end of the gas flow cavity, and one side of the gas flow cavity communicates with a filter; the infrared multi-light path optical system comprises a circulation cavity which communicates with the filter, infrared multi-light path gas measurement mechanisms are symmetrically arranged in the circulation cavity, a circulating gas hole is arranged in the circulation cavity, and the circulating gas hole communicates with the gas inlet. The invention realizes the matching between the spectral characteristics of light sources and detectors and the characteristic absorption band of measured gas. Moreover, the gas concentration measurement system relies on the sampling of the circulating gas flow in the circulation cavity of the gas suction chamber to detect gas concentration, and thereby the real-time collection and measurement of environmental gas are ensured.

Description

technical field [0001] The invention relates to the technical field of gas concentration measurement, in particular to an infrared multi-optical path gas concentration measurement optical system of an active circulation suction device. Background technique [0002] In the gas concentration measurement system using infrared light-emitting tubes as the light source, the following five types of interference should be considered in the design of the optical system. [0003] (1) The influence of temperature. The emission intensity and peak emission wavelength of the luminescent tube change with temperature. In a moderate ambient temperature range, the shift of wavelength is not large (<3nm / ℃), but the change of emission intensity is obvious. In addition, the lead sulfide or lead selenide detectors commonly used in infrared gas measurement have a great correlation with temperature, and this correlation is generally >1% / ℃. [0004] (2) Signal fluctuations caused by fluctuat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3518
CPCG01N21/3518
Inventor 范国强
Owner XIAN SILICON OPTOELECTRONICS TECH
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