Crystal magneto-optical valve system used for DC large current monitoring

Abstract

The invention discloses a crystal magneto-optical valve system for direct current high current monitoring, comprising: a trigger, a fiber optic current transformer and a demodulator, the trigger and the fiber optic current transformer are respectively connected with the demodulator by optical cables; The optical fiber current transformer includes a plurality of magneto-optical crystal sensor heads, optical fiber branchers, optical scales and homogeneous magnetic rings, and a plurality of magneto-optical crystal sensor heads are connected in series on the optical scale and are grouped and connected in parallel on the optical fiber brancher. The splitter is connected with the optical scale, and the other end of the optical fiber splitter is connected with the demodulator by an optical cable; the magneto-optical crystal sensor head is a sensor head made of a crystal light valve; the demodulator Including information storage module and current calculation module. It has the characteristics of strong resistance to external magnetic field interference, high measurement accuracy, strong accuracy and high reliability.

Description

technical field [0001] The invention relates to a crystal magneto-optic valve system, in particular to a crystal magneto-optic valve system for direct current large current monitoring. Background technique [0002] The DC current transformer is used for the mutual inductance of the DC current value transformation, and is widely used in metallurgy, chemical industry, carbon and other industries and various systems that need to monitor large DC currents. The instrument can output standard voltage and current signals at the same time. It can be connected with other instruments as a signal source for monitoring and control. It uses the non-linearity and asymmetry of the iron core in the core coil when it is magnetized by the DC and AC currents, and through the rectification circuit, the DC large current passing through the coil is converted into a DC small current inversely proportional to the number of turns. It is mainly used to measure large DC currents, and is also used as ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the traditional DC current monitoring system has large errors in the measurement of large currents, is easily affected by interference signals, and responds slowly when the height is high, and cannot guarantee its measurement accuracy. The crystal magneto-optical valve system for high current monitoring adopts the following technical solutions:

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