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Photo-thermal catalyzed gas leakage sensor based on fiber bragg grating detection and detection method thereof

A photothermal catalysis and fiber grating technology, applied in the fields of photothermal catalysis and optical fiber sensing, can solve problems such as late start

Active Publication Date: 2018-12-07
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Gas leakage detection sensors are now widely used in people's production and life, but because the research and development of combustible gas leakage detection sensors in my country started later than in foreign countries, there are still some shortcomings in the reliability of the sensors

Method used

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  • Photo-thermal catalyzed gas leakage sensor based on fiber bragg grating detection and detection method thereof
  • Photo-thermal catalyzed gas leakage sensor based on fiber bragg grating detection and detection method thereof
  • Photo-thermal catalyzed gas leakage sensor based on fiber bragg grating detection and detection method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A photothermal catalytic gas leakage sensor based on fiber Bragg grating detection, such as figure 1 As shown, the sensor includes an upper part of the sensor gas chamber 1 and a lower part of the photoheating chamber 2; the photoheating chamber 2 and the sensor gas chamber 1 are separated by a light conversion film 6; the sensor An air chamber partition 4 is arranged in the air chamber 1, and the air chamber partition 4 is centrally fixed in the sensor air chamber 1; the upper end of the air chamber partition 4 is connected to the shell of the sensor air chamber 1 body top, the lower end of the gas chamber partition 4 is connected to the light conversion film 6; the gas chamber partition 4 divides the sensor gas chamber 1 into a detection gas chamber a and a temperature compensation gas chamber b The lower half of the detection gas chamber a reserves a space for loading a carrier catalyst, and the cavity reserved for loading a catalyst in the sensing gas chamber can ho...

Embodiment 2

[0049] A photothermal catalytic gas leakage sensor based on fiber Bragg grating detection, such as figure 1 As shown, the sensor includes an upper part of the sensor gas chamber 1 and a lower part of the photoheating chamber 2; the photoheating chamber 2 and the sensor gas chamber 1 are separated by a light conversion film 6; the sensor An air chamber partition 4 is arranged in the air chamber 1, and the air chamber partition 4 is centrally fixed in the sensor air chamber 1; the upper end of the air chamber partition 4 is connected to the shell of the sensor air chamber 1 body top, the lower end of the gas chamber partition 4 is connected to the light conversion film 6; the gas chamber partition 4 divides the sensor gas chamber 1 into a detection gas chamber a and a temperature compensation gas chamber b . Wherein, the specific structure of each part of the sensor is as follows:

[0050] Sensor air chamber: such as figure 2 The shown sensing air chamber uses a stainless st...

Embodiment 3

[0059] A gas leakage detection method based on the photothermal catalytic gas leakage sensor described in claim 1, such as Figure 10 As shown, the detection system adopted by the gas leakage detection method includes a photothermal catalytic gas leakage sensor, a 980nm semiconductor laser, a built-in fiber grating temperature sensing unit 25 in the detection gas chamber, and a built-in reference fiber grating temperature sensor in the temperature compensation gas chamber. unit 26, computer terminal 30, laser control circuit 31 and fiber grating demodulator 32; the sensing fiber grating channel port 3 of the photothermal catalytic gas leakage sensor passes through the detection gas chamber built-in fiber grating temperature sensing unit 25 and the The temperature sensor of the fiber grating demodulator 32 is connected to the external fiber grating demodulator channel one 28; the temperature compensation fiber grating channel port 7 of the sensing fiber grating channel port 3 of...

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Abstract

The invention provides a photo-thermal catalyzed gas leakage sensor based on fiber bragg grating detection and a detection method thereof and belongs to the technical field of photo-thermal catalysisand optical fiber sensing. The sensor comprises an upper sensor gas chamber and a lower photo heating chamber; the photo heating chamber and the sensor gas chamber are separated through a photo conversion film; a gas chamber partition plate is arranged in the sensor gas chamber; and the gas chamber partition plate divides the sensor gas chamber into a gas chamber for detection and a gas chamber for temperature compensation. The sensor can reach high sensitivity to gas leakage, high precision detection and excellent anti-explosive characteristic.

Description

technical field [0001] The invention relates to a photothermal catalysis gas leakage sensor based on optical fiber grating detection and a detection method thereof, belonging to the technical fields of photothermal catalysis and optical fiber sensing. Background technique [0002] At present, natural gas is the energy with the fastest growing consumption in the world, and the demand for natural gas in my country is also increasing year by year. Whether in industrial production or in residential life, the use of natural gas occupies a very large proportion. In recent years, with the smooth implementation of projects such as the West-to-East Gas Pipeline, the signing of the Sino-Russian gas transmission agreement, and the import of Australian natural gas by sea, more and more gas transmission pipeline networks have been laid in my country, and the main component of civil gas in most areas is carbon monoxide. into natural gas. [0003] Natural gas is a colorless and odorless fl...

Claims

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Application Information

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IPC IPC(8): G01N25/28
CPCG01N25/28
Inventor 吕国辉姜旭张金玲崔政兴王延连王亮
Owner HEILONGJIANG UNIV