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Sensors 2017, 17(3), 551; doi:10.3390/s17030551

An Elimination Method of Temperature-Induced Linear Birefringence in a Stray Current Sensor

1
School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
2
School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
3
School of Mechatronic Engineering, Xuzhou College of Industrial Technology, Xuzhou 221116, China
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 15 January 2017 / Revised: 26 February 2017 / Accepted: 7 March 2017 / Published: 9 March 2017
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [10403 KB, uploaded 10 March 2017]   |  

Abstract

In this work, an elimination method of the temperature-induced linear birefringence (TILB) in a stray current sensor is proposed using the cylindrical spiral fiber (CSF), which produces a large amount of circular birefringence to eliminate the TILB based on geometric rotation effect. First, the differential equations that indicate the polarization evolution of the CSF element are derived, and the output error model is built based on the Jones matrix calculus. Then, an accurate search method is proposed to obtain the key parameters of the CSF, including the length of the cylindrical silica rod and the number of the curve spirals. The optimized results are 302 mm and 11, respectively. Moreover, an effective factor is proposed to analyze the elimination of the TILB, which should be greater than 7.42 to achieve the output error requirement that is not greater than 0.5%. Finally, temperature experiments are conducted to verify the feasibility of the elimination method. The results indicate that the output error caused by the TILB can be controlled less than 0.43% based on this elimination method within the range from −20 °C to 40 °C. View Full-Text
Keywords: stray current sensor; temperature-induced linear birefringence; geometric rotation effect stray current sensor; temperature-induced linear birefringence; geometric rotation effect
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MDPI and ACS Style

Xu, S.; Li, W.; Xing, F.; Wang, Y.; Wang, R.; Wang, X. An Elimination Method of Temperature-Induced Linear Birefringence in a Stray Current Sensor. Sensors 2017, 17, 551.

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