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Hydrogen sulfide gas detection method and detection device based on double metal cladding waveguide

A double-sided metal and gas detection technology, applied in the field of hydrogen sulfide detection, can solve problems such as limited sensitivity and inability to achieve a safe environment, and achieve the effects of low price, convenience and promotion, and high sensitivity

Inactive Publication Date: 2017-09-15
复拓科学仪器(苏州)有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the sensitivity of this method is very limited, and it cannot meet the minimum index (10ppm) required by the safety environment.

Method used

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  • Hydrogen sulfide gas detection method and detection device based on double metal cladding waveguide
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  • Hydrogen sulfide gas detection method and detection device based on double metal cladding waveguide

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the examples, but not as a limitation of the present invention.

[0018] Please combine figure 1 As shown, the hydrogen sulfide gas detection device based on the double-sided metal-clad waveguide used in this embodiment includes a prism coupling double-sided metal-clad waveguide, a laser 9 with an emission wavelength of 1575nm and a divergence angle of less than 0.3mrad for receiving reflection Optical CCD detection element 10, a calculation module for receiving data from the CCD detection element 10 to calculate the concentration of hydrogen sulfide gas to be measured, and a peristaltic pump (peristaltic pump and calculation module) for pumping gas samples into the sample chamber or discharging from the sample chamber not shown in the figure).

[0019] The structure of the prism-coupled double-sided metal-clad waveguide is as follows, which consists of a cylindrical prism 1, an upper metal film ...

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Abstract

The invention discloses a hydrogen sulfide gas detection method based on double metal cladding waveguide. According to the hydrogen sulfide gas detection method, hydrogen sulfide gas to be detected is introduced into a prism coupling double metal cladding waveguide sample chamber, a laser is used for emitting parallel light with a wavelength of 1575nm for incidence of the prism coupling double metal cladding waveguide surface at a certain angle, it is ensured that reflected light contains a guide mode attenuation total reflection absorption peak, a CCD detection element is used for receiving the attenuation total reflection absorption peak of the hydrogen sulfide gas to be detected, the gray scale of the darkest attenuation total reflection absorption peak of hydrogen sulfide gas to be detected is measured, and the concentration of hydrogen sulfide gas to be detected is obtained based on a corresponding scale of the gray scale and the concentration of standard hydrogen sulfide gas. The invention also discloses a hydrogen sulfide gas detection device based on double metal cladding waveguide. The hydrogen sulfide gas detection method and the hydrogen sulfide gas detection device can be used for trace hydrogen sulfide detection, and are high in sensitivity; and the hydrogen sulfide gas detection device is simple in structure, and is portable.

Description

technical field [0001] The invention relates to a hydrogen sulfide detection method and detection device, in particular to a hydrogen sulfide gas detection method and detection device based on a double-sided metal-clad waveguide. Background technique [0002] Hydrogen sulfide (H 2 S) is a colorless, highly toxic, strongly acidic, irritating and suffocating colorless gas, and is the main pollutant in the ambient air. It is widely distributed and comes from the combustion of natural gas, coal, petroleum and sulfur-containing compounds. Hydrogen sulfide is highly destructive to humans and the environment, and even a trace amount of gas is very harmful to the human body. Its toxicity is 5-6 times that of carbon monoxide CO. Low concentration exposure will cause local irritation to the respiratory tract and eyes, and high concentration will have a more obvious effect on the whole body, manifested as central nervous system symptoms and suffocation. Hydrogen sulfide is also high...

Claims

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Application Information

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IPC IPC(8): G01N21/552
CPCG01N21/552
Inventor 陈凡曹庄琪陈小林
Owner 复拓科学仪器(苏州)有限公司
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