A dry-contact method for transmitting higher frequency components of ultrasound

Issue title: ICMIT '01

Article type: Research Article

Authors: Tohmyoh, Hironori^{a; *} | Saka, Masumi^a

Affiliations: [a] Department of Mechanical Engineering, Tohoku University, Japan

Correspondence: [*] Corresponding author: Hironori Tohmyoh, Department of Mechanical Engineering, Tohoku University, Aoba 01, Aramaki, Aoba-ku, Sendai 980-8579, Japan. Tel.: +81 22 217 6899; Fax: +81 22 217 6893; E-mail: [email protected]

Abstract: Although it is possible to achieve higher resolution by conventional ultrasonic technique, it suffers from a disadvantage because testing has to be performed in a liquid medium. In contrast with the conventional technique, a dry-contact ultrasonic technique, which can be carried out without wetting the testing parts, is preferable. In a new technique that is developed by the authors, a dry-contact interface is used by inserting a membrane between water and the tested parts. Experiments were also carried out in search of membrane that can transmit higher frequency components. Dry-contact ultrasonic transmission using two kinds of plastic films and a silicone rubber sheet was performed on an acrylic resin. It was shown that the plastic films far excel in transmitting higher frequency components than the silicone rubber sheet.

DOI: 10.3233/JAE-2003-272

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 18, no. 1-3, pp. 31-39, 2003