Method and device for measuring heavy current of magnetic coupled fiber grating

磁力耦合式光纤光栅大电流测量方法及装置

Abstract

一种磁力耦合式光纤光栅大电流测量方法及装置。该装置包括电流接入导线、集磁片、弹性元件,光纤布喇格光栅以及辅助定位构件;其中集磁片与集磁片之间通过弹性元件连接,光纤布喇格光栅安装在弹性元件上,辅助定位构件用于电流接入导线与集磁片之间的定位。当大电流进入电流接入导线时,在导线周围形成磁场将集磁片磁化后,集磁片与集磁片,集磁片与导线之间产生相互作用力,引起与集磁片相连的弹性元件发生弹性形变,进而导致安装在弹性元件上的光纤布喇格光栅的中心波长发生移动,此信号通过光纤传输到光纤光栅解调仪解调,达到测量大电流的目的。本装置体积小,重量轻,结构简单,本质绝缘,不需接外电源,适用于大电流的测量和监测。
The invention relates to a method and device for measuring heavy current of a magnetic coupled fiber grating. The device comprises a current access wire, magnetism collecting sheets, elastic elements, a fiber Bragg grating and an auxiliary positioning component, wherein the magnetism collecting sheets are mutually connected through the elastic elements; the fiber Bragg grating is arranged on the elastic elements; and the auxiliary positioning component is used for the positioning between the current access wire and the magnetism collecting sheets. When the heavy current enters into the current access wire, a magnetic field is formed around the wire to magnetize the magnetism collecting sheets; interaction forces generate among the magnetism collecting sheets as well as between the magnetism collecting sheets and the wire so that elastic deformation of the elastic elements connected with the magnetism collecting sheets is aroused and then the centre wavelength of the fiber Bragg grating arranged on the elastic elements is moved; and a signal is transmitted to a fiber grating demodulation instrument through a fiber to be demodulated; and therefore, the purpose of measuring the heavy current is achieved. The device has the advantages of small volume, light weight, simple structure, insulation in nature and no need for external power and is suitable for measuring and monitoring the heavy current.

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    CN-102818920-ADecember 12, 2012武汉理工大学基于电磁力的光纤电流测量方法及装置
    CN-105486904-AApril 13, 2016哈尔滨工业大学二分式光学电流传感器