Optical fibre electric current sensor sensitive coil winding equipment

Abstract

Sensitive coil winding equipment of an optical fiber current sensor comprises a nut, a pressure plate, a frame arrangement base, a drive wheel, a lock mechanism and a handle, which are sequentially arranged on a spindle from left to right, wherein a sensitive coil frame is fixed on the frame arrangement base by the nut and the pressure plate; the frame arrangement base and the drive wheel are arranged on the spindle through a coupling; a spindle bearing base is fixed on a pedestal through a support frame and are respectively positioned on both sides of the drive wheel to fix the spindle; the spindle and the coil frame can be driven to rotate by shaking the handle and further to drive the drive wheel to rotate and drive a fiber guide mechanism to operate through a transmission belt; and the lock mechanism is arranged between the handle and the spindle bearing base close to the handle for locking the rotation of the spindle, so that the coil frame is kept as the original position. The winding equipment has the advantages of no external torsion stress to optical fiber, controllable fiber tension, adjusting fiber pitch, simple operation, etc., and can be used for winding sensitive coil of interferometric optical fiber current sensor to ensure the performance uniformity of the sensitive coil.

Description

technical field [0001] The invention relates to a winding device for a sensitive coil of an optical fiber current sensor. Background technique [0002] The optical current sensor (OCT) sensitive coil made of single-mode fiber or low birefringence fiber will respond to the magnetic field change caused by the current flowing through the conductor due to the magneto-optic Faraday effect when the polarized light is transmitted inside. , resulting in a phase shift. Since the optical fiber sensitive coil is installed on the high-voltage line, affected by the external environment temperature, the response of the optical fiber current sensor (OCT) will change with the change of temperature, resulting in errors in the test results. Under the environment (-40 ~ +65 ℃), it is difficult to achieve high-precision measurement with an error of less than 0.2%. [0003] The main causes of OCT temperature sensitivity are internal residual stress and uneven core diameter of the fiber core, o...

AI Technical Summary

Problems solved by technology

Because it is designed for winding fiber optic gyroscopes over 100 meters long, it needs electric control and complex structure. The fiber to be wound needs to be wound on the driven wheel in advance. The distance between the fiber optics between the driving wheel and the driven wheel is relatively large, and the fibers are closely arranged It is impossible to accurately control the fiber spacing and fiber tensile stress, and it is easy to introduce torsional stress, so it is not suitable for accurate control of fiber spacing and stress. The winding process requires manual monitoring, and the fiber is only a few meters. The sensitive coil of the fiber optic current sensor

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