Air coupled through transmission of aluminum and other recent results using MUTs

Author

Ladabaum, I. ; Jin, X.C. ; Khuri-Yakub, B.T.

Author_Institution

Edward L. Ginzton Lab., Stanford Univ., CA, USA

Volume

2

fYear

1997

fDate

5-8 Oct 1997

Firstpage

983

Abstract

The air-coupled transmission of 2.3 MHz longitudinal ultrasonic waves through aluminum is reported. Microfabricated ultrasonic transducers are used to emit and receive the ultrasonic tone burst. The signal at the receiver is 30 dB above the noise floor, which implies a dynamic range of approximately 110 dB. The dynamic range is independently verified, and transmission through steel is also demonstrated. Air-coupled NDE scans of lucite plates are presented. An optimized fabrication process, based on theoretical understanding of the transducers, enables the experiments. Significant progress in the fabrication of immersion MUTs is also in evidence. An insertion loss of 4 dB is reported and transmission experiments show 100 dB of dynamic range with 100% bandwidth

Keywords

aluminium; ultrasonic materials testing; ultrasonic transducers; ultrasonic transmission; 2.8 MHz; 4 dB; Al; MUT; NDE; air coupled transmission; aluminum; dynamic range; fabrication; insertion loss; longitudinal ultrasonic wave; lucite plate; microfabricated ultrasonic transducer; steel; Acoustic transducers; Aluminum; Couplings; Dynamic range; Fabrication; Frequency; Piezoelectric transducers; Silicon; Ultrasonic imaging; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE

Conference_Location

Toronto, Ont.

ISSN

1051-0117

Print_ISBN

0-7803-4153-8

Type

conf

DOI

10.1109/ULTSYM.1997.661745

Filename

661745