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Jianpeng He
National Engineering Research Center of Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083, China

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Journal article
Published: 04 May 2017 in Sensors
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Electromagnetic acoustic transducers (EMATs) are non-contact, ultrasonic transducers that are usually kept within 5 mm from the sample surface to obtain a sufficient signal-to-noise ratio (SNR). One important issue associated with operation on a ferromagnetic plate is that the strong attraction force from the magnet can affect measurements and make scanning difficult. This paper investigates a method to generate fundamental, symmetric Lamb waves on a ferromagnetic plate. A coil-only, low-weight, generation EMAT is designed and investigated, operating at lift-offs of over 5 mm. Another design of an EMAT is investigated using a rectangular magnet with a much higher lift-off than the coil, of up to 19 mm. This results in a much lower force between the EMAT and sample, making scanning the EMAT much easier.

ACS Style

Jianpeng He; Steve Dixon; Samuel Hill; Ke Xu. A New Electromagnetic Acoustic Transducer Design for Generating and Receiving S0 Lamb Waves in Ferromagnetic Steel Plate. Sensors 2017, 17, 1023 .

AMA Style

Jianpeng He, Steve Dixon, Samuel Hill, Ke Xu. A New Electromagnetic Acoustic Transducer Design for Generating and Receiving S0 Lamb Waves in Ferromagnetic Steel Plate. Sensors. 2017; 17 (5):1023.

Chicago/Turabian Style

Jianpeng He; Steve Dixon; Samuel Hill; Ke Xu. 2017. "A New Electromagnetic Acoustic Transducer Design for Generating and Receiving S0 Lamb Waves in Ferromagnetic Steel Plate." Sensors 17, no. 5: 1023.