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

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...

AI Technical Summary

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

Images