Fiber bragg grating self-temperature compensating current sensor

Abstract

The invention relates to a fiber bragg grating self-temperature compensating current sensor which comprises a fixed mount, an overhanging beam, an electromagnet, an attraction piece, and a first fiber bragg grating and a second fiber bragg grating which are arranged on a same optical fiber, wherein the overhanging beam is horizontally arranged, one end of the overhanging beam is a free end, the other end of the overhanging beam is a fixed end, the fixed end is connected to the fixed mount, the middle of the overhanging beam is provided with an elastic area, the optical fiber is arranged on the overhanging beam, the first and the second fiber bragg gratings are respectively positioned at the upper side and the lower side of the elastic area of the overhanging beam, the electromagnet is arranged on the fixed mount and is positioned below the free end of the overhanging beam, and the free end of the overhanging beam is provided with the attraction piece. Compared with the prior art, the sensor has the advantages of high measurement precision, long transmission distance, smaller influence of temperature variation and the like.

Description

technical field [0001] The invention relates to a current sensor, in particular to a fiber grating temperature self-compensating current sensor. Background technique [0002] The current sensor is a widely used sensor in the power industry, and it is also the basic sensor of the smart grid. It can be used for metering, power transmission and distribution, and safety monitoring; Basic sensing element. Electronic sensors are generally used in various existing detection schemes. Due to temperature interference, electromagnetic interference, safety, long-distance transmission, service life, reliability and other reasons, they cannot solve the current sensing problems in this series of industries well. [0003] Existing current sensor devices generally adopt electronic methods, generally do not have passive characteristics and long-distance transmission functions, and have poor anti-interference ability and low precision; Perform temperature compensation; secondly, electronic c...

AI Technical Summary

Problems solved by technology

Electronic sensors are generally used in various existing detection schemes. Due to temperature interference, electromagnetic interference, safety, long-distance transmission, service life, reliability and other reasons, current sensing problems in this series of industries cannot be well solved.

[0003] Existing current sensor devices generally adopt electronic methods, generally do not have passive characteristics and long-distance transmission functions, and have poor anti-interference ability and low precision; Perform temperature compensation; secondly, electronic current sensors cannot work in a high-voltage environment, there is a danger of leakage and creepage, and the measurement accuracy

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