A fiber grating sensor calibration device based on liquid nitrogen -based cooling cooler

A fiber grating and conduction cooling technology, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of long heating and cooling time, no unique sensor design, expensive refrigerators, etc., and achieve the effect of reducing heat leakage

Active Publication Date: 2021-08-10
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the price of general refrigerators is relatively expensive, and it takes a long time to heat up and down, and there is no unique design for sensor laying

Method used

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  • A fiber grating sensor calibration device based on liquid nitrogen -based cooling cooler
  • A fiber grating sensor calibration device based on liquid nitrogen -based cooling cooler
  • A fiber grating sensor calibration device based on liquid nitrogen -based cooling cooler

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Embodiment

[0038] Such as Figure 1 to Figure 3 As shown, the embodiment of the present invention provides a fiber grating sensor calibration device based on liquid nitrogen conduction cooling, which includes a liquid storage tank 1 , and a liquid storage tank cover 2 is arranged on the top of the liquid storage tank 1 . The liquid storage barrel 1 and the barrel cover 2 are sealed with epoxy resin, which can reduce the temperature exchange between the inside of the tank and the outside.

[0039] The liquid storage barrel 1 is provided with a heat insulating device, a temperature regulating barrel 3, a fiber grating sensor and a temperature reference sensor; Temperature barrel 3; an isolation tube 4 is provided inside the temperature adjustment barrel 3, and the lower end of the isolation tube 4 runs through the bottom of the temperature adjustment barrel 3 and communicates with the heat insulation device.

[0040] The heat insulation device includes a heat insulation barrel 8, the heat...

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Abstract

The invention provides a fiber grating sensor calibration device based on liquid nitrogen conduction cooling, which belongs to the technical field of sensor calibration devices. Including that the top of the liquid storage tank is provided with a liquid storage tank cover, the heat insulation device is arranged at the bottom of the liquid storage tank, and the temperature adjustment tank is arranged above the heat insulation device; the temperature control tank is provided with an isolation tube, and the lower end of the isolation tube runs through the temperature control tank The bottom of the tank is connected to the heat insulation device; the fixed rod runs through the isolation tube and can be inserted into the heat insulation device movably; the fiber grating sensor and the temperature reference sensor are arranged in the fixed rod; the first pipe and the second pipe are arranged on the lid of the liquid storage tank , add liquid nitrogen to the liquid storage barrel and the temperature regulating barrel respectively. The present invention calibrates the optical fiber grating sensor through liquid nitrogen conduction refrigeration, and realizes the calibration of the optical fiber grating sensor in the temperature range of 77-293K; it can conveniently and safely lay the optical fiber grating sensor and the temperature reference sensor into the temperature-changing device, through Isolation reduces heat leakage and makes it easier for the sensor's temperature to reach 77K.

Description

technical field [0001] The invention relates to the technical field of sensor calibration devices, in particular to a fiber grating sensor calibration device based on liquid nitrogen conduction cooling. Background technique [0002] Due to its small size, light weight, anti-electromagnetic interference, and easy reuse, fiber grating sensors are considered to be sensor devices that can replace traditional electrical signal sensors in the field of high-temperature superconducting magnets. The application of fiber grating sensors in the field of superconductivity is mainly to measure temperature and strain. [0003] According to the principle of the sensor, when using the sensor for absolute temperature measurement, the sensor must be calibrated for temperature. Different from other types of fiber optic sensors, the fiber Bragg grating sensor is a sensor for wavelength demodulation. The broadband light source emits a beam of light, which passes through the transmission fiber a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/3206G01K15/00
CPCG01K11/3206G01K15/002G01K15/005
Inventor 方进刘延超贾冬雨
Owner BEIJING JIAOTONG UNIV
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