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An Improved Design of the Spiral-Coil EMAT for Enhancing the Signal Amplitude

Institute of Smart Engineering, School of Automation, Chongqing University, Chongqing 400044, China
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Author to whom correspondence should be addressed.
Academic Editor: Xiaoning Jiang
Sensors 2017, 17(5), 1106; https://doi.org/10.3390/s17051106
Received: 12 March 2017 / Revised: 20 April 2017 / Accepted: 22 April 2017 / Published: 12 May 2017
(This article belongs to the Section Physical Sensors)
The low energy transition efficiency of electromagnetic ultrasonic transducer (EMAT) is a common problem in practical application. For the purpose of enhancing the amplitude of the received signal, an improved double-coil bulk wave EMAT is proposed for the thickness measurement of metallic block. This new configuration of magnets consists of a solid cylindrical magnet and a ring-shaped magnet encircling the outer side of the solid cylindrical one. A double-coil was applied instead of a single spiral-coil. Numerical simulations were performed to analyze and optimize the proposed configuration of the EMAT by the 2-D axisymmetric finite element model (FEM). The experiment effectively verifies the rationality of the new configuration and the feasibility of improving the signal strength. View Full-Text
Keywords: electromagnetic ultrasonic transducer; double-coil; finite element model; signal-to-noise ratio; bulk wave electromagnetic ultrasonic transducer; double-coil; finite element model; signal-to-noise ratio; bulk wave
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MDPI and ACS Style

Jia, X.; Ouyang, Q.; Zhang, X. An Improved Design of the Spiral-Coil EMAT for Enhancing the Signal Amplitude. Sensors 2017, 17, 1106. https://doi.org/10.3390/s17051106

AMA Style

Jia X, Ouyang Q, Zhang X. An Improved Design of the Spiral-Coil EMAT for Enhancing the Signal Amplitude. Sensors. 2017; 17(5):1106. https://doi.org/10.3390/s17051106

Chicago/Turabian Style

Jia, Xiaojuan, Qi Ouyang, and Xinglan Zhang. 2017. "An Improved Design of the Spiral-Coil EMAT for Enhancing the Signal Amplitude" Sensors 17, no. 5: 1106. https://doi.org/10.3390/s17051106

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