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Calibration device and method for linear temperature sensor array

A temperature sensor and linear sensor technology, applied in thermometers, measuring devices, thermometer testing/calibration, etc., can solve the problems of being easily affected by bending stress, low precision, and poor consistency, and achieve simple devices, simple calibration devices, and calibration accuracy high effect

Pending Publication Date: 2019-01-04
CHINA THREE GORGES UNIV
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Problems solved by technology

[0004] The present invention provides a calibration device and method for a linear temperature sensor to overcome the problems of low precision, poor consistency, and susceptibility to bending stress in the existing linear temperature sensor calibration method

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  • Calibration device and method for linear temperature sensor array

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Embodiment Construction

[0034] Such as figure 1 As shown, a calibration device for a linear temperature sensor includes a hard tube 4 , a linear temperature sensor array 2 , a thermometer 7 , a demodulator 1 , and a fixing frame 9 .

[0035] The bottom end of the hard tube 4 is sealed with a valve and the top is open; the fixed frame 9 vertically fixes the hard tube 4;

[0036] The hard tube 4 is filled with a liquid heat transfer medium 8;

[0037] One end of the linear temperature sensor array 2 is placed freely downward along the opening at the top of the hard tube 4, and the other end of the linear temperature sensor array 2 is connected to the demodulator 1;

[0038] The thermometer 7 is fixed in parallel with the sensing points on the linear temperature sensor array 2 .

[0039] The liquid heat transfer medium 8 is water or oil, the temperature of which is changed by the ambient temperature outside the hard tube 4 .

[0040] The linear temperature sensor array 2 is a fiber grating array.

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Abstract

The invention relates to a calibration device and method for a linear temperature sensor array. The calibration device includes a rigid tube, a fixing frame, a linear sensor array, high-precision platinum thermometers and a demodulator, wherein linear sensors are fixed with a traction rope and are not influenced by stress, the multiple high-precision platinum thermometers are attached to the traction rope to be in the same position as a to-be-calibrated sensor, a plastic tube is vertically fixed through the fixing frame, the bottom is enclosed, the water is injected from a nozzle, the temperature measurement environment in the actual still water is simulated, the fixed linear sensors and the thermometers are placed in the plastic tube together with the traction rope so that the sensors arein a straight and unstressed state during calibration, the temperature in the plastic tube is changed through the temperature of the external environment, the measurement time and temperature valuesof the linear sensors and the high precision platinum thermometers are compared, and the temperature curve of the sensors is calibrated. The calibration device is advantaged in that problems of low precision, poor consistency and vulnerability to bending stress in a bending method in the prior art are overcome, and the calibration device has important application values in calibration of high precision fiber grating temperature sensors.

Description

technical field [0001] The invention relates to the field of optical fiber temperature sensing, in particular to a calibration device and method for a linear temperature sensor array. Background technique [0002] Fiber Bragg grating sensor arrays have great potential in the field of high-precision temperature sensing due to their significant advantages such as high sensitivity, anti-electromagnetic interference, large-space distributed measurement, and easy networking. However, since the fiber grating sensor directly measures the change of wavelength, it cannot directly reflect the temperature. The change of fiber Bragg wavelength and the change of temperature have a linear relationship under certain conditions. By performing temperature calibration on the linear fiber grating sensor and determining the relationship between the change of fiber grating wavelength and the change of ambient temperature, the wavelength can be accurately calculated. The temperature value is use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K15/00
CPCG01K15/007Y02E30/30
Inventor 罗志会张宇程文胜刘敏潘礼庆
Owner CHINA THREE GORGES UNIV
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