Rail defect inspection using alternating current excitation coils with digital demodulation algorithm

Author

Liu, Ze ; Jia, Wei ; Zhu, Lixiong ; Zhang, Xiaofei

Author_Institution

State Key Lab. of Rail Traffic Control & Safety, Beijing Jiaotong Univ., Beijing, China

fYear

2011

fDate

10-12 May 2011

Firstpage

1

Lastpage

4

Abstract

Rail defect inspection using alternating current excitation coils is introduced in this paper. By using different kinds of coils, rail inspection sensors are designed with optimizing method. In order to find out the optimized coil structure and the excitation frequency, electromagnetic finite element method is used to simulate the performance of the detection sensors. Furthermore, the experiment system has been developed to test the defects in the rail samples. In this experimental system, digital demodulation algorithms are used to extract the influence of defects on the excitation and measurement coils. Then the defects in the rail samples can be calculated.

Keywords

coils; eddy currents; finite element analysis; flaw detection; inspection; optimisation; railway industry; alternating current excitation coils; detection sensors; digital demodulation algorithm; electromagnetic finite element method; optimisation; rail defect inspection; Coils; Computers; Current measurement; Electromagnetics; Inspection; Rails; Sensors; Digital demodulation; Electromagnetic; Rail defects; Rail flaw detection;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE

Conference_Location

Binjiang

ISSN

1091-5281

Print_ISBN

978-1-4244-7933-7

Type

conf

DOI

10.1109/IMTC.2011.5944142

Filename

5944142