High-temperature superconducting coil magnetic field measurement method based on optical fiber magnetic field sensing technology

Abstract

The invention provides a high-temperature superconducting coil magnetic field measuring method, which comprises the following steps of: winding an electric heating wire on the outer surface of a magneto-optical crystal optical fiber magnetic field sensor, connecting a thermocouple with the magneto-optical crystal optical fiber magnetic field sensor, and arranging the thermocouple in a vacuum Dewarto obtain a composite optical fiber magnetic field sensor; connecting the composite optical fiber magnetic field sensor with a signal acquisition device, wherein the signal acquisition device transmits an acquired signal to a computer; connecting the composite optical fiber magnetic field sensor with a signal control device to generate a control signal and transmitting the control signal to the composite optical fiber magnetic field sensor; arranging the composite optical fiber magnetic field sensor inside the superconducting coil, arranging the superconducting coil in a low-temperature environment, arranging the signal acquisition device in a room temperature environment. The method can avoid the condition that the sensor is damaged by a strong electromagnetic field and greatly reduces the measurement cost; the magnetic field measurement of high-temperature superconducting equipment such as a high-temperature superconducting magnet, a high-temperature superconducting motor and the like is achieved; the possibility of electrical breakdown of the elements and components is avoided, and the measurement cost is obviously reduced.

Description

technical field [0001] The invention relates to the technical field of superconducting coil magnetic field measurement, in particular to a method for measuring the magnetic field of a high-temperature superconducting coil, in particular to a method for measuring the magnetic field of a high-temperature superconducting coil based on magneto-optic crystal fiber optic magnetic field sensing technology. Background technique [0002] High-temperature superconducting coils are coils with superconducting properties produced by winding high-temperature superconducting strips. The structure of the superconducting coil is generally pie or spiral, and its typical structure is as follows: figure 1 , figure 2 shown. Superconducting magnets composed of superconducting coils have higher current transmission efficiency than conventional electromagnets, so they can generate larger magnetic fields. For superconducting coils, fully grasping the magnetic field parameters will help to provid...

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Problems solved by technology

If the fiber optic magnetic field sensor is directly placed in a low temperature environment, its measurement range will be greatly limited

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