A simple method for generating the monopole ultrasonic pulse and its sound field

Author

Imano, Kazuhiko ; Inoue, Hiroshi

Author_Institution

Dept. of Electr. & Electron. Eng., Akita Univ., Japan

Volume

2

fYear

1997

fDate

5-8 Oct 1997

Firstpage

1017

Abstract

The cycloid function voltage having no resonant component is applied to the piezo-ceramic planar and concave circular transducers to generate the monopole ultrasonic pulse. On-axis pressure characteristics of two kinds of transducer are observed using monopole ultrasonic pulse. As the experimental results, 1) the sound field of monopole ultrasonic pulse is consisted of direct wave and edge wave, and these are separated in time near the transducer, 2) the monopole ultrasonic pulse from a planar transducer becomes bipolar pulse in the large distance from the transducer and 3) in case of the concave transducer, the monopole ultrasonic pulse is gradually changed to the bipolar pulse around the focus, are clearly observed. These experimental results can be explained by the interference between direct wave and edge wave using monopole ultrasonic pulse. A possibilities of the diffraction effect which dominated at the focus of concave transducer is also suggested

Keywords

acoustic field; acoustic pulses; piezoelectric transducers; ultrasonic transducers; concave circular transducer; cycloid function voltage; diffraction; direct wave; edge wave; interference; monopole ultrasonic pulse generation; piezoceramic transducer; planar transducer; sound field; Acoustic pulses; Acoustic transducers; Focusing; Optical pulse generation; Optical pulses; Pistons; Pulse generation; Resonance; Ultrasonic transducers; Voltage;

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.1997.661753

Filename

661753