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Sensors 2014, 14(8), 13644-13660; doi:10.3390/s140813644

Smart Elasto-Magneto-Electric (EME) Sensors for Stress Monitoring of Steel Cables: Design Theory and Experimental Validation

1
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
2
Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
3
Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, China
*
Authors to whom correspondence should be addressed.
Received: 4 April 2014 / Revised: 2 July 2014 / Accepted: 16 July 2014 / Published: 28 July 2014
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Abstract

An elasto-magnetic (EM) and magneto-electric (ME) effect based elasto-magneto-electric (EME) sensor has been proposed recently by the authors for stress monitoring of steel cables with obvious superiorities over traditional elasto-magnetic sensors. For design optimization and engineering application of the EME sensor, the design theory is interpreted with a developed model taking into account the EM coupling effect and ME coupling effect. This model is able to approximate the magnetization changes that a steel structural component undergoes when subjected to excitation magnetic field and external stress, and to simulate the induced ME voltages of the ME sensing unit located in the magnetization area. A full-scale experiment is then carried out to verify the model and to calibrate the EME sensor as a non-destructive evaluation (NDE) tool to monitor the cable stress. The experimental results agree well with the simulation results using the developed model. The proposed EME sensor proves to be feasible for stress monitoring of steel cables with high sensitivity, fast response, and ease of installation. View Full-Text
Keywords: elasto-magnetic (EM); magneto-electric (ME); elasto-magneto-electric (EME) sensor; steel cable; stress monitoring elasto-magnetic (EM); magneto-electric (ME); elasto-magneto-electric (EME) sensor; steel cable; stress monitoring
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Zhang, R.; Duan, Y.; Or, S.W.; Zhao, Y. Smart Elasto-Magneto-Electric (EME) Sensors for Stress Monitoring of Steel Cables: Design Theory and Experimental Validation. Sensors 2014, 14, 13644-13660.

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