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High-temperature sensor based on FBG and working and manufacturing method of high-temperature sensor

A high-temperature sensor and sensor body technology, which is applied to thermometers, instruments, thermometers, etc. that change physically/chemically, can solve the problems of sensor function and size, low reliability, low sensitivity, etc., and achieve a wide range of use. Effect of small size and high temperature measurement sensitivity

Pending Publication Date: 2020-09-04
XIANGTAN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the existing FBG temperature sensor technology is relatively mature, but in the field of high temperature, it still has defects such as low sensitivity, low reliability, and low precision.
Especially in high-tech fields such as aerospace, traditional sensors have been unable to meet the needs of the industry due to non-functional deficiencies such as function and size, so it is urgent to develop a high-sensitivity sensor

Method used

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  • High-temperature sensor based on FBG and working and manufacturing method of high-temperature sensor
  • High-temperature sensor based on FBG and working and manufacturing method of high-temperature sensor
  • High-temperature sensor based on FBG and working and manufacturing method of high-temperature sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Such as figure 1 , a high temperature sensor based on FBG, the sensor includes a bare optical fiber 1, a first sensitization FBG package 2, a connecting arm 301, a hollow chamber 302, a fixed base 303, a second sensitization FBG package 304, a push rod 305 , a piston 306 , a nut 4 , a first sensitizing FBG polyimide curing thin strip 501 , a second sensitizing FBG polyimide curing thin strip 502 , and a high temperature resistant rubber 6 .

[0091] The sensitized FBG and PI solution are solidified in the polyimide thin tape, wherein, the two ends of the first sensitized FBG packaging sheet are respectively fixed to the two connecting arms by bolts.

[0092] The temperature compensation FBG is located in the second sensitization-increasing FBG packaging chip, and the temperature-measuring FBG is located in the first sensitization-increasing FBG packaging chip.

[0093] One side of the sensor is the first sensitization FBG packaging sheet 2, and its two ends are fixed w...

Embodiment 2

[0095] A manufacturing method of a high-precision FBG high-temperature sensor includes fixing the FBG in a tube furnace, closing the tube furnace, inserting high-temperature cotton at both ends, and completing the annealing process.

Embodiment 3

[0097] Repeat Example 2, except that the high temperature causes thermal expansion of the high-temperature-resistant rubber, and the ejector pin acts on the first sensitized FBG packaging sheet, so that the temperature-measuring FBG inside it can recognize its bending tension.

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Abstract

The invention provides an FBG-based high-temperature sensor and a working and manufacturing method thereof. The high-temperature sensor comprises two FBG channels with different functions; one FBG channel is used as a temperature compensation channel of the sensor, and the other FBG channel is used as an indirect temperature measurement channel of the sensor; the two channels respectively comprisean FBG and have the same packaging structure; the high-temperature sensor further comprises an FBG packaging sheet which is used for packaging and protecting a bare optical fiber containing the FBG,and a pushing structure which acts on the FBG packaging sheet as a power source of the sensor. The sensor has the advantages of being small in size, high in high-temperature sensitivity, high in temperature measurement precision and the like, and has good convenience in the aspect of integrated networking under the high-temperature working condition. The characteristics of the sensor determine that the sensor is especially suitable for aerospace, hot well oil fields, civil engineering fire protection and other fields related to high-temperature sensing.

Description

technical field [0001] The invention relates to the field of high-temperature monitoring equipment, in particular to an FBG-based high-temperature sensor and its working and manufacturing methods. Background technique [0002] Optical fiber sensor is a sensor that converts the state of the measured object into a measurable optical signal. Since the birth of optical fiber sensor, it has been widely used in many traditional sensing fields because of its advantages of anti-electromagnetic interference, intrinsic safety, small size, light weight and easy embedding into materials. [0003] Harsh environments such as high temperature in deep space and strong electromagnetic interference will cause immeasurable damage to the aircraft during its service. Therefore, research on the reliability of aircraft in this harsh environment has become a key point. With the transformation of aerospace fuel, the working process of aircraft fuel tanks is in a high temperature state, and the ent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01K11/3206
CPCG01K11/3206
Inventor 杨才千李帅杨国玉杨宁张立业范丽张旭辉许福
Owner XIANGTAN UNIV
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