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Methane gas concentration sensor air chamber based on infrared absorption principle

A concentration sensor, methane gas technology, applied in the gas chamber field of the gas concentration sensor to achieve the effects of small size, short response time and corrosion prevention

Inactive Publication Date: 2010-09-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcomings of the existing mechanically modulated infrared methane gas concentration sensor, such as long response time, poor anti-interference ability and complex structure, the present invention proposes a Gas cell of methane gas concentration sensor based on infrared absorption principle

Method used

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  • Methane gas concentration sensor air chamber based on infrared absorption principle
  • Methane gas concentration sensor air chamber based on infrared absorption principle

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Experimental program
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specific Embodiment approach 1

[0009] Specific implementation mode one: combine figure 1 Describe this embodiment, this embodiment comprises cylindrical housing 1, infrared emitter port 7, infrared receiver port 8, axial flow exhaust fan 12 and two probe protection tubes 14; Exhaust port 13 and air inlet 2; Infrared emitter port 7 and infrared receiver port 8 positions are opened in the middle part of cylindrical housing 1 oppositely, the central optical axis of infrared emitter port 7 and the center of infrared receiver port 8 The optical axis is on the same axis; the inner surface of the infrared emitter port 7 and the inner surface of the infrared receiver port 8 in the cylindrical shell 1 are respectively equipped with an inner diameter and the caliber of the infrared emitter port 7 and the infrared receiver The same probe protection tube 14 with the same caliber at the mouth 8, the central axis of the two probe protection tubes 14 is on the same axis as the central optical axis of the infrared emitter...

specific Embodiment approach 2

[0010] Specific implementation mode two: combination figure 1 Describe this embodiment, the difference between this embodiment and specific embodiment 1 is that it also adds two layers of air intake filter screen 3; Other compositions and connection methods are the same as those in Embodiment 1. The purpose of adding the intake filter 3 is to filter out the impurities in the measured gas.

specific Embodiment approach 3

[0011] Specific implementation mode three: combination figure 1 Describe this embodiment, the difference between this embodiment and specific embodiment 1 is that it also increases the particle moisture absorbing agent layer 4; Other compositions and connection methods are the same as those in Embodiment 1. The purpose of adding the particle moisture-absorbing agent layer 4 is to absorb and filter the water vapor in the measured gas.

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Abstract

The invention relates to an air chamber for a methane gas concentration sensor on the basis of the infrared absorption principle, which relates to the air chamber for the methane gas concentration sensor and is provided for overcoming the defects of long response time, poor anti-interference ability and complex structure in a mechanical modulation-type infrared methane gas concentration sensor. The air chamber for the methane gas concentration sensor comprises a cylindrical shell, an infrared transmitter opening, a receiver opening, an axial-flow exhaust fan and probe protection tubes, wherein the infrared transmitter opening and the receiver opening are correspondingly arranged in the middle of the cylindrical shell by means of running through; central optical axes of the infrared transmitter opening and the receiver opening are positioned in the same axial line; the probe protection tubes are arranged on the infrared transmitter opening and the receiver opening respectively; centralaxial lines of the two probe protection tubes and the central optical axes of the infrared transmitter opening and the infrared receiver opening are positioned in the same axial line; a gap L is reserved between the two probe protection tubes; and the axial-flow exhaust fan is arranged on the upper inside of the cylindrical shell. The air chamber for the methane gas concentration sensor has the advantages of quick response speed, strong anti-interference ability, high stability and simple structure.

Description

technical field [0001] The invention relates to a gas chamber of a gas concentration sensor, in particular to a gas chamber of an infrared gas concentration sensor. Background technique [0002] At present, the more advanced gas detection method at home and abroad is to use the principle of infrared absorption to detect gas. It overcomes the shortcomings of the previous detection methods, such as easy poisoning and aging, and being affected by environmental factors. At the same time, it also has the advantages of high sensitivity, fast response, and good selectivity. Therefore, the research on the method of detecting gas by using the infrared principle will have important practical significance and good application prospects to ensure the safety of industrial production and daily life. The main disadvantages of the existing mechanical modulation methane concentration sensor are slow response speed and poor anti-interference ability; its response time is generally greater t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/35G01N21/3504
Inventor 孙晓刚戴景民王文萃原桂彬
Owner HARBIN INST OF TECH