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

Sensors

Ru Zhang¹  Yuanfeng Duan¹  Siu Wing Or² 

[1]College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China

[2] E-Mails:

[3]Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China

关键词: elasto-magnetic (EM);    magneto-electric (ME);    elasto-magneto-electric (EME) sensor;    steel cable;    stress monitoring;   

DOI  :  10.3390/s140813644

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.