Optical fiber current sensor sensitive coil capable of being wound freely and manufacturing method

Abstract

The invention discloses an optical fiber current sensor sensitive coil capable of being wound freely and a manufacturing method. The optical fiber current sensor sensitive coil comprises a light path body, an optical fiber protective sleeve, a capillary tube, a reinforced plastic base body, an inner protective sleeve and an outer protective sleeve, wherein the light path body is formed by a polarization maintaining optical fiber, a lambda / 4 wave plate, a sensitive optical fiber and a reflector. According to the optical fiber current sensor sensitive coil, the adopted sensitive optical fiber is not subjected to high-temperature annealing treatment and can keep an obvious bendable state so that the sensitive coil can be wound into various shapes more easily to the larger degree and is easy to disassemble and assemble, and higher current measurement accuracy is guaranteed; the sensitive coil has the advantages that tensile strength is high, and waterproof performance and softness are good; the sensitive coil can be bent, disassembled and assembled repeatedly, and the shape of the sensitive coil can be adapted to external conditions; the sensitive coil can be used both indoors and outdoors, and is easy to transport and capable of saving space.

Description

technical field [0001] The invention relates to a sensitive coil of an optical fiber current sensor and a manufacturing method thereof, in particular to a freely winding sensitive coil of an optical fiber current sensor and a manufacturing method thereof, and belongs to the technical field of sensor design. Background technique [0002] The fiber optic current sensor is a photoelectric sensor based on the Faraday magneto-optical effect. Because of its advantages of high voltage insulation, high safety and reliability, and low maintenance costs, it has a good market prospect, especially the reflective fiber optic current sensor. , which has better performance due to its better reciprocity. In the reflective fiber optic current sensor, the left-handed and right-handed circularly polarized light transmitted in the sensitive coil will induce different phase changes after the magnetic field generated by the current to be measured, and then by demodulating the phase difference bet...

AI Technical Summary

Problems solved by technology

This kind of sensitive coil does not have a variable shape, but can only have a fixed and predetermined shape, and when the diameter of the sensitive coil is large, it is not conducive to transportation and installation

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