Method for encapsulating optical fiber Bragg grating temperature sensor

A temperature sensor, fiber Bragg technology, used in thermometers, thermometers with physical/chemical changes, instruments, etc., can solve problems such as temperature sensor damage, and achieve the effects of simple structure, good stability, and improved response speed.

Inactive Publication Date: 2010-06-16
韩红远 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in use, the fiber grating temperature sensor without protection is easily damaged by the extrusion and shear force of the external force. Variation of FBG Bragg wavelength

Method used

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  • Method for encapsulating optical fiber Bragg grating temperature sensor

Examples

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Embodiment Construction

[0012] Peel off the 5mm coating layer on both sides of the grating area of ​​the fiber grating 1 to expose the bare optical fiber, and clean it with acetone. Use a fusion splicer to weld the two ends of the fiber grating 1 to the two ends of the optical fiber in the optical cable. The fiber grating 1 is fixed on the fixing point 3 of the grooved metal strip 4, the grooved metal strip 4 is 30cm in length and is made of stainless steel sheet. The optical fiber grating 1 and the pigtail 6 are in a relaxed state, the bonding points at both ends of the grooved metal strip 4 are glued to the optical fiber, and the optical cable armoring layer 7 is fixed on the grooved metal strip 4 with the optical cable armoring layer fixing bolts 13, Fill the gap with heat-conducting silicone grease 5; place the above-mentioned encapsulated grooved metal strip 4 in a stainless steel package shell 11 with a length of 40 cm, and press the steel wire 9 in the transmission optical cable 8 into the symm...

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Abstract

The invention relates to a method for encapsulating a fiber Bragg grating temperature sensor, which aims to isolate external stress and strengthen the stability of the sensor. In the method, coating layers on both sides of a grid region of a fiber Bragg grating are removed to expose optical fibers, the optical fibers are cleaned by acetone, and both ends of the fiber Bragg grating are in welded connection with both ends of the optical fibers in an optical cable by using a welding machine; the fiber Bragg grating and an optical cable armor layer are fixed on a groove-shaped metal strip, the fiber Bragg grating and pigtails are in a loosing state, then bonding points at both ends of the groove-shaped metal strip are stuck with the optical fibers firmly, and heat-conducting silicone grease is filled into gaps; the encapsulated groove-shaped metal strip is put in a stainless steel encapsulation shell, steel wires in the transmission optical cable are pressed into symmetrical grooves in the stainless steel encapsulation shell to ensure that the fiber Bragg grating and the pigtails are in a loosing state in the encapsulation shell, and then the heat-conducting silicone grease is filled into the encapsulation shell.

Description

technical field [0001] The invention relates to a packaging method for an optical fiber Bragg grating temperature sensor, in particular to a packaging method for an optical fiber Bragg grating temperature sensor suitable for temperature monitoring in a closed fire zone under a coal mine. Background technique [0002] Temperature is a very important parameter in industrial production, especially in underground coal mine operations. Through the measurement and analysis of temperature, it can evaluate the dynamics of underground production layers in coal mines, accurately measure the temperature profile gradient in closed fire areas, and reflect the long-term production characteristics of underground mines. . Compared with the traditional temperature sensor, the fiber Bragg grating temperature sensor has the advantages of small size, high measurement accuracy, anti-electromagnetic interference, good long-term stability, and long-distance signal transmission. It is a good choice...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G02B6/255G01K11/3206
Inventor 韩红远朱翔宇张育军杨丽君党晓燕
Owner 韩红远
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