Photoelectric Hybrid Current Sensor Combination of LPCT and FFI

A new kind of photoelectric hybrid current sensor is designed. The low-power current transformer (LPCT) is used as the primary sensor for current conversion. The optical fiber Fizeau interferometer acts as the secondary sensor for noncontact microvibration detection. An electro-dynamic structure wor...

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Bibliographic Details
Published in:IEEE photonics technology letters 2014-12, Vol.26 (24), p.2476-2479
Main Authors: Ma, Rende, Tian, Jianxiang, Xia, Yunjie, Cao, Dianguo, Zhao, Hongyan
Format: Article
Language:English
Subjects:
Bridges (structures)
Conversion
Current measurement
Current transformers
Displacement
Error analysis
Interferometers
Optical fiber polarization
Optical fiber sensors
Optical fibers
Optical interferometry
Photoelectricity
Sensors
Vibrations
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Summary:A new kind of photoelectric hybrid current sensor is designed. The low-power current transformer (LPCT) is used as the primary sensor for current conversion. The optical fiber Fizeau interferometer acts as the secondary sensor for noncontact microvibration detection. An electro-dynamic structure works as a bridge connecting the two sensors. Using two different ways as frequency response analysis and linear fitting method, similar sensitivity results are obtained. It is considered to be 3.5152 nm/A when the current frequency is 50 Hz. When LPCT works at the rated primary current of 450 A, the maximum measurement ratio error and phase displacement are
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2014.2359091