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Nondestructive Testing of Train Wheels Using Vertical Magnetization and Differential-Type Hall-Sensor Array

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7 Author(s)
Jinyi Lee ; Dept. of Control, Chosun Univ., Gwangju, South Korea ; Myoungki Choi ; Jongwoo Jun ; Seokjin Kwon
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This study proposes a differential-type Hall-sensor array and vertical magnetizers used to improve the detection ability of crack in express-train wheels. In addition, exclusive parallel signal-conditioning circuits, analog-to-digital converting circuits, and interface were developed to reduce measurement time. The permanent magnet applies a vertical magnetic field on the wheel, while the differential-type linearly integrated Hall-sensor array measures the distribution of the magnetic field around a crack. The proposed method was verified by experiments.

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:61 ,  Issue: 9 )

Date of Publication:

Sept. 2012

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