Packaging structure and method of optical fiber Fabry-Perot sensor for temperature measurement of nuclear facility

A Fab sensor and packaging structure technology, applied in measuring devices, thermometers, measuring heat, etc., can solve the problems that armored structures are difficult to respond to high-speed temperature changes, restrict the development of nuclear power temperature measurement devices, and have large armored structures. To achieve the effect of ensuring high-speed time response characteristics, increasing versatility and consistency, and small size

Active Publication Date: 2019-02-05
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The armored structure must not only ensure the insulation performance requirements of the thermocouple during normal operation, but also meet the mechanical strength requirements of nuclear power safety, which makes the armored structure larger in size and longer in temperature response time, so it is difficult for the armored structure to meet The requirement of high-speed temperature change response restricts the development of nuclear power temperature measurement devices

Method used

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  • Packaging structure and method of optical fiber Fabry-Perot sensor for temperature measurement of nuclear facility
  • Packaging structure and method of optical fiber Fabry-Perot sensor for temperature measurement of nuclear facility
  • Packaging structure and method of optical fiber Fabry-Perot sensor for temperature measurement of nuclear facility

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Embodiment 1

[0034] In order to ensure the high temperature stability and high sensitivity of the optical fiber Fab sensor, such as Figure 4 The shown femtosecond laser 501 processes the large-cavity long fiber optic sensor of the fiber optic sensor of the present invention on the bare optical fiber 52, and its steps are:

[0035] S2: Using a femtosecond laser 501 to manufacture a fiber optic F-P cavity 54 on the top of the bare fiber 52 using a single-point positioning method to form a fiber-optic F-P sensor, which can work at a high temperature of 800°C without attenuation;

[0036] S2: Clean the optical fiber sensor produced in step S1 with acetone, coat it with a single-end thin layer of high-temperature-resistant adhesive 51, and penetrate from the center into a single-end sealed capillary steel pipe 55 with an outer diameter of 0.5 mm and an inner diameter of 0.2 mm. In the process, the high temperature resistant glue is cured, so that the optical fiber Fab cavity region 54 is in a ...

Embodiment 2

[0042] In order to ensure the high temperature stability and high sensitivity of the optical fiber Fab sensor, such as Figure 5 The shown hollow-core optical fiber (or hollow-core photonic crystal fiber) 503 makes the large-cavity long Fab sensor, and its steps are:

[0043] (1) Cut off and polish the right end face of the bare optical fiber 52 and the left end face of the hollow-core optical fiber (or hollow-core photonic crystal fiber) 503, and weld them together with an optical fiber fusion splicer;

[0044] (2) According to the designed length, the right end face of the hollow-core optical fiber (or hollow-core photonic crystal fiber) 503 is cut off and polished;

[0045] (3) Cut off and polish the left end face of another section of bare optical fiber 52 again, and weld it with the right end face of the hollow-core optical fiber (or hollow-core photonic crystal fiber) 503 with an optical fiber fusion splicer to form an optical fiber Fab cavity 54. The sensor can work at...

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Abstract

The invention relates to a packaging structure and a packaging method of an optical fiber Fabry-Perot sensor for temperature measurement of a nuclear facility, and belongs to the technical field of optical fiber sensing. The structure comprises a single-mode optical fiber, an adiabatic guide column, a flange base, a capillary steel pipe, a stainless steel armored pipe, and an optical fiber Fabry-Perot sensor. The method comprises the following steps of: fabricating the optical fiber Fabry-Perot sensor on the top of the single-mode optical fiber; penetrating the optical fiber into the single-end sealed capillary steel pipe, and bonding and fixing the optical fiber with a high-temperature adhesive; penetrating the capillary steel pipe into the stainless steel armored pipe with an inner diameter of 0.5 mm, and exposing a sensing part to the outside of the stainless steel armored pipe about 2 to 3 mm; separately inserting the adiabatic guide column and the stainless steel armored pipe intothe flange base from two ends; welding and sealing the joint of the capillary steel pipe and the stainless steel armored pipe, and the joint of the stainless steel armored pipe and the base; and carrying out annealing treatment on the entire sensor. According to the packaging structure and the packaging method, the size limitation of a thermocouple sensor on the packaging structure is broken, anda sensing method with a high-speed temperature response is provided for the temperature measurement of the nuclear facility.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and relates to a packaging structure and method of an optical fiber F-P sensor used for temperature measurement of nuclear facilities. Background technique [0002] The safe operation of nuclear facilities is very important. Once an accident occurs, the consequences will be unimaginable. Therefore, it is necessary to monitor the key parameters of nuclear facilities in real time. This operation is not only a basic means to ensure the normal operation of nuclear facilities, but also an important way to prevent catastrophic accidents. measure. Temperature is one of the important parameters for safety monitoring of nuclear facilities. Since the most important task of nuclear facilities is safety, any temperature monitoring device must ensure the absolute safety of nuclear facilities in order to meet the expected measurement requirements. Long-term research and application assessment ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32B23K26/20
CPCG01K11/32B23K26/206
Inventor 陈伟民邵高杰邵斌张伟章鹏雷小华刘显明
Owner CHONGQING UNIV
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