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An optical fiber methane sensor

A methane sensor and optical fiber technology, applied in the field of sensors, can solve the problem of few types

Active Publication Date: 2018-09-21
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are many theoretical studies on the optical fiber methane sensor based on the mode interference reflection structure, in practical application, there are few types of products of the optical fiber methane sensor based on the mode interference reflection structure

Method used

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  • An optical fiber methane sensor

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Embodiment Construction

[0024] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0025] The technical solutions provided by various embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0026] An embodiment of the present application provides an optical fiber methane sensor for monitoring changes in the concentration of methane gas. The specific structure diagram...

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Abstract

An embodiment of the invention provides an optical fiber methane sensor for monitoring concentration change of methane gas. The optical fiber methane sensor comprises a port and a sensing element, wherein the sensing element comprises a single mode optical fiber, a multimode optical fiber, a sensing optical fiber, a methane sensitive film and a metallic reflection film, wherein the single mode optical fiber, the multimode optical fiber and the sensing optical fiber are sequentially connected, a coating layer of the sensing optical fiber is covered with the methane sensitive film, the metallic reflection film is located at one end of the sensing optical fiber, and the port is located at one end of the single mode optical fiber.

Description

technical field [0001] The present application relates to the technical field of sensors, in particular to an optical fiber methane sensor. Background technique [0002] Methane is widely distributed in nature and is the main component of natural gas and biogas, commonly known as gas. However, when methane reaches a certain concentration, it can suffocate people, and it is a flammable and explosive gas. Methane explosions can also easily cause coal dust explosions. Therefore, in order to prevent accidents and minimize casualties, it is necessary to install equipment that can detect the concentration of methane gas in real time and quickly in relevant places. [0003] In the existing equipment for detecting the concentration of methane gas, the optical fiber methane sensor is widely used because of some properties of the optical fiber itself. For example, when the optical fiber transmits information, the energy loss is very small, which is convenient for long-distance remot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/45
CPCG01N21/45G01N2021/458
Inventor 王旭甄玉龙刘长文
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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