Manufacture method for long-period fiber bragg grating hydrogen sulfide gas sensor as well as sensor prepared by same and detection method for hydrogen sulfide concentration

A gas sensor and optical fiber grating technology, applied in the field of gas sensing, can solve problems such as severe corrosion of equipment and threats to human health, and achieve the effects of fast response time, light weight and low cost

Active Publication Date: 2017-10-27
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrogen sulfide not only poses a threat to human health, but also severely corrodes equipment exposed to its environment

Method used

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  • Manufacture method for long-period fiber bragg grating hydrogen sulfide gas sensor as well as sensor prepared by same and detection method for hydrogen sulfide concentration
  • Manufacture method for long-period fiber bragg grating hydrogen sulfide gas sensor as well as sensor prepared by same and detection method for hydrogen sulfide concentration
  • Manufacture method for long-period fiber bragg grating hydrogen sulfide gas sensor as well as sensor prepared by same and detection method for hydrogen sulfide concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The manufacture method of the long-period fiber grating hydrogen sulfide gas sensor in this specific embodiment comprises the following steps:

[0044] 1) Obtain a long-period fiber grating, and clean its surface, place the long-period fiber grating in an alcohol solution with a mass ratio of 35%, and perform a shock treatment with 35KHz ultrasonic waves for 10 minutes, take it out and place it in Dry at room temperature until constant weight; then place it in deionized water, oscillate with 35KHz frequency ultrasonic waves for 10 minutes, take it out and dry at room temperature until constant weight; then place the long-period fiber grating at a pH of 10 Soak in sodium hydroxide solution for 10 minutes, take out and dry at room temperature until constant weight;

[0045] 2) Prepare citric acid-molybdenum disulfide mixed colloidal solution: add molybdenum disulfide nanopowder into 1.6mol / L citric acid solution at a mass ratio of 0.2:150 and stir until the solution becom...

Embodiment 2

[0058] As another embodiment of the present invention, the manufacturing method of the long-period fiber grating hydrogen sulfide gas sensor in this specific embodiment includes the following steps:

[0059] 1) Obtain a long-period fiber grating and clean its surface; place the long-period fiber grating in an alcohol solution with a mass ratio of 40%, and perform a shock treatment with 41KHz ultrasonic waves for 14 minutes, take it out and place it in Dry at room temperature until constant weight; then place it in deionized water, oscillate with 42KHz frequency ultrasonic waves for 17 minutes, take it out and dry it at room temperature until constant weight; then place the long-period fiber grating in a pH value of 11 Soak in sodium hydroxide solution for 16 minutes, take out and dry at room temperature until constant weight;

[0060] 2) Prepare citric acid-molybdenum disulfide mixed colloid solution: add molybdenum disulfide nano powder into 1.6mol / L citric acid solution acco...

Embodiment 3

[0067] As another embodiment of the present invention, the manufacturing method of the long-period fiber grating hydrogen sulfide gas sensor in this specific embodiment includes the following steps:

[0068] 1) Obtain a long-period fiber grating and clean its surface; place the long-period fiber grating in an alcohol solution with a mass ratio of 45%, and perform a shock treatment with 45KHz ultrasonic waves for 20 minutes, take it out and place it in Dry at room temperature until constant weight; then place it in deionized water, oscillate with 45KHz frequency ultrasonic waves for 20 minutes, take it out and dry at room temperature until constant weight; then place the long-period fiber grating in a pH value of 12 Soak in sodium hydroxide solution for 20 minutes, take it out and dry it at room temperature until constant weight;

[0069] 2) Prepare citric acid-molybdenum disulfide mixed colloid solution: add molybdenum disulfide nano powder into 1.6mol / L citric acid solution a...

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Abstract

The invention discloses a manufacture method for a long-period fiber bragg grating hydrogen sulfide gas sensor. One layer of citric acid-molybdenum disulfide composite sensitive membrane is attached to the long-period fiber bragg grating so as to use the obtained long-period fiber bragg grating hydrogen sulfide gas sensor to carry out concentration detection on the hydrogen sulfide gas. The long-period fiber bragg grating hydrogen sulfide gas sensor provided by the invention has the advantages of simple structure, stability in working, small volume and light weight. The manufacture method is simple and low in cost, has a good detection effect on the hydrogen sulfide gas and has the advantages of rapid response time and accuracy and high reliability.

Description

technical field [0001] The invention relates to the field of gas sensing, in particular to a method for manufacturing a long-period optical fiber grating hydrogen sulfide gas sensor, the sensor, and a method for detecting hydrogen sulfide concentration. Background technique [0002] Hydrogen sulfide (H 2 S) gas is one of the main exhaust gases in modern industry. It has a wide range of distribution, many people in contact with it, and high toxicity hazards. There are at least 70 occupations that have the opportunity to be exposed to hydrogen sulfide in daily life. Reports about worker poisoning are very common. Hydrogen sulfide is an acute neurotoxic gas. Inhalation of a small amount of high-concentration hydrogen sulfide can be fatal in a short time. The critical concentration of hydrogen sulfide is 10ppm, and the lethal concentration is 500ppm. Hydrogen sulfide not only poses a threat to human health, but also severely corrodes equipment exposed to its environment. The d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25
CPCG01N21/25G01N2201/088
Inventor 冯文林秦祥杨晓占邓大申陈溶马诗章彭志清
Owner CHONGQING UNIV OF TECH
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