Current transformer and current detection system

A current transformer and current detection technology, applied in the direction of measuring current/voltage, voltage/current isolation, instruments, etc., can solve the problems of stability and accuracy error rate, and achieve stable working conditions and good test results
CN101710148AInactive Publication Date: 2010-05-19SOUTH CHINA NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA NORMAL UNIVERSITY
Publication Date
2010-05-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a current transformer with a sensing head which comprises a giant magnetostrictive material and two fiber gratings, wherein the fiber gratings are respectively positioned at the upper surface and the lower surface of the giant magnetostrictive material and are intercrossed at different surface layers of the giant magnetostrictive material. The invention further discloses a current detection system; according to the embodiment of the invention, linear, efficient and stable working state of the giant magnetostrictive material and the fiber gratings is acquired by means of temperature compensation via two fiber gratings, and the test result is good.
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Description

technical field

[0001] The invention relates to the field of electronic applications, in particular to a current transformer and a current detection system. Background technique

[0002] Optical current transformers can be divided into active type and passive type according to whether the transformer part needs power supply. Passive type is a photoelectric current measuring device that does not have a power supply for the transformer part. It uses optical elements as current sensing elements. When external information interacts with light waves propagating in the optical medium, certain parameters of the light waves will be changed (such as Intensity, frequency, wavelength, phase or polarization state, etc.), that is, use this parameter to modulate the external information. At present, intensity-modulated, phase-modulated and polarization-modulated passive photoelectric current transformers have come out. However, due to the stability and reliability of the optical compone...

Claims

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