Optical fibre electric current sensor all-optical fibre sensing head

Abstract

The invention discloses a full optical fiber sensing head of optical fiber current sensor, which is designed to solve the problems of the prior sensing head such as inconvenience in achieving field installation and detachment. The f sensing head of the invention comprises a beam, a turning angle member, an adjusting member, a connection angle member and a hose. The beam comprises a first lower beam, a first upper beam, a second lower beam, a second upper beam, a third lower beam, a third upper beam, a fourth lower beam and a fourth upper beam. The turning angle member comprises a turning angle A lower plate, a turning angle A lower plate, a turning angle B lower plate, a turning angle B upper plate, a first bending angle lower plate, a first bending angle upper plate, a second bending angle lower plate and a second bending angle upper plate. The connection angle member comprises a connection angle A lower plate, a connection angle A upper plate, a connection angle B lower plate and a connection angle B upper plate. The adjusting member comprises an A adjusting member, a B adjusting member, a C adjusting member and a D adjusting member with the same structures. The full optical fiber sensing head of the invention can be installed and detached on live line with short detachment time. By adopting modularization design ideal, the invention can achieve miniaturized structure design to effectively reduce the weight and the size of the sensing head configuration.

Description

Technical field [0001] The present invention relates to an optical fiber current sensor for measuring current, and more particularly, to the mechanical structure of an all-optical sensor head of an optical fiber current sensor for measuring large currents of 3 to 320KA. Background technique [0002] Fiber-optic current sensor is an emerging power measurement device based on the Faraday magneto-optical effect and using optical fiber as the medium. It determines the angle at which the polarization plane of a light wave rotates due to the magnetic field generated by the current when it passes through the magneto-optical material. Measure the size of the current. The sensor head is the most important and key component of the fiber optic current sensor. Analyzed the structure and working principle of the sensor head of all-fiber type and hybrid type fiber-optic current sensor, which has an important guiding role in improving the design of fiber-optic current sensor, improving the perf...

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional Hall effect current sensor is generally used in the field of large current measurement. Although its accuracy is also high, it will produce erroneous output, such as saturation caused by the maximum magnetic field; when selecting and placing the sensing head, the Hall effect The sensor head of the ear effect current sensor is susceptible to the asymmetrical magnetic field and crosstalk caused by the adjacent current, so it is necessary to analyze the magnetic field distribution; the sensor head of the Hall effect current sensor is heavy and requires a specific bracket for installation; The sensor head of the effect current sensor needs to be pre-installed on the busbar, the installation process is complicated, and must be installed with power off, and accuracy calibration is required after installation

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