Time-sharing power supply control system for liquid helium level gauge

Abstract

The invention discloses a time-sharing power supply control system for a liquid helium level gauge. The time-sharing power supply control system comprises the liquid helium level gauge, a constant current source (4) and a computer control system (7). The liquid helium level gauge comprises a heater strip (1), a niobium-titanium superconducting filament (2) and a level gauge fixing rod (3), wherein the heater strip (1) and the niobium-titanium superconducting filament (2) are welded in series, and are fixed on the level gauge fixing rod (3). The constant current source (4) supplies power to the liquid helium level gauge. An on-off control card (5) and a voltage acquisition card (6) are arranged in the computer control system (7), wherein the on-off control card (5) is connected in series with a power supply circuit of the constant current source (4), and is used for controlling the on / off state and on / off time of power supply current. The computer control system (7) controls the on / off state and on / off time of the on-off control card (5), reads voltage values at the two ends of the niobium-titanium superconducting filament (2) of the liquid helium level gauge through the voltage acquisition card (6), and converts the voltage values into a level value.

Description

technical field [0001] The invention relates to a time-sharing power supply control system for a liquid helium level gauge, in particular to a time-sharing power supply control system for a liquid helium Dewar level gauge. Background technique [0002] The liquid helium level gauge can realize the continuous measurement of the liquid helium level in the liquid helium Dewar. An existing liquid helium level gauge consists of a niobium-titanium superconducting wire, a heating wire and a liquid level gauge fixing rod. For fixing niobium-titanium superconducting wire and heating wire, the level gauge fixing rod is made of epoxy material suitable for working in low temperature environment and low heat loss. The niobium-titanium superconducting wire is vertically placed in the liquid helium Dewar, the upper part is in the gas helium, and the length is set as L1, and the lower part is in the liquid helium, and the length is set as L2. Pass the current I through the niobium-titaniu...

AI Technical Summary

Problems solved by technology

[0006] When the existing liquid helium level gauge reads the liquid helium level value, the liquid helium level gauge is always in the energized state. Due to the power on, the liquid helium will be lost due to heat, which will not only cause the volatilization of the liquid helium to waste financial resources, but also cause the liquid helium to stop. Watt replenishment of liquid helium brings great inconvenience and wastes manpower

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