Fiber bragg grating alternating current sensor

A fiber grating, AC current technology, applied in the direction of measuring current/voltage, instruments, measuring electrical variables, etc., can solve the problems of high price and complex structure of fiber grating temperature self-compensation current sensor, achieve low cost, simple structure, eliminate Measure the effect of the influence of the current

Inactive Publication Date: 2014-07-30
SHANGHAI ELECTRIC CABLE RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The fiber Bragg grating temperature self-compensating current sensor can be used to measure DC current and AC current, but for occasions that only need to measure AC current, the structure of the fiber Bragg grating temperature self-compensating current sensor is relatively complicated and expensive

Method used

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  • Fiber bragg grating alternating current sensor
  • Fiber bragg grating alternating current sensor
  • Fiber bragg grating alternating current sensor

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Embodiment Construction

[0032] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0033] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, terms such as "upper"...

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Abstract

The invention provides a fiber bragg grating alternating current sensor which comprises a fixing rack, a cantilever beam and a magnetizer. The cantilever beam sequentially comprises a fixed end, a deformation area and a free end, wherein the fixed end is fixed on the fixing rack, and an armature is arranged at the free end. The magnetizer is in a shape of an open loop, the middle of the magnetizer is provided with a cavity for a tested lead wire to penetrate, a gap communicated with the cavity is formed between two ends of the magnetizer, and air gaps are reserved between two ends of the magnetizer and the armature. The cantilever beam further comprises a groove, only one fiber bragg grating in a pre-stretching state is arranged at the open position of the groove, two ends of the fiber bragg grating are respectively and fixedly connected with the fixed end and the free end, and the fiber bragg grating and the deformation area are parallel. The fiber bragg grating alternating current sensor is simple in structure, low in cost, capable of well testing alternating current and achieving temperature self-compensation, eliminating the influence of the temperature on the fiber bragg grating measuring current and further improving the measuring accuracy.

Description

technical field [0001] The invention relates to a current sensor, in particular to an optical fiber grating alternating current sensor for measuring alternating current. Background technique [0002] The current sensor is a widely used sensor in the power industry. It is also the basic sensor of the smart grid. It can be used for metering, power transmission and distribution, safety monitoring, etc. It is a common basic sensing element for detection or monitoring in the power industry. . The current sensor can feel the information of the measured current, and can transform the current information sensed by the detection into an electrical signal that meets certain standards or other required forms of information output according to certain rules, so as to meet the needs of information transmission, processing, and storage. , display, recording and control requirements. Various existing current detection schemes generally use electronic sensors, but due to temperature inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
Inventor 涂建坤丁薇霞曹春耕
Owner SHANGHAI ELECTRIC CABLE RES INST
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