期刊
IEEE ACCESS
卷 10, 期 -, 页码 26117-26126出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2022.3156609
关键词
Acoustics; Vibrations; Transducers; Resonant frequency; Ultrasonic imaging; Piezoelectric materials; Harmonic analysis; High-power ultrasound; DPLUS; harmonic modes; acoustic pressure
资金
- JSPS KAKENHI [20H02097]
- Japan Keirin Autorace Foundation (JKA)
- JSPS DC2 program (Japan Society for the Promotion of Science program for doctoral course students) [21J10822]
- Grants-in-Aid for Scientific Research [20H02097, 21J10822] Funding Source: KAKEN
This paper investigated the use of hard-type PZTs in Double Parabolic refLectors wave-guided Ultrasonic tranSducers (DPLUS) to achieve wide-frequency (20 kHz-2 MHz) high-power output (10 MPa). The results showed that under resonant excitation, the hard-type PZT DPLUS had significantly higher peak vibration velocity and acoustic pressure compared to soft-type piezoelectric materials DPLUS, making it suitable for various applications.
To achieve wide-frequency (20 kHz-2 MHz) high-power output (10 MPa) of Double Parabolic refLectors wave-guided Ultrasonic tranSducers (DPLUS), this paper investigated the DPLUS with hard-type PZTs. Under resonant excitation of the DPLUS waveguide, around 30 harmonic longitudinal modes from the thin waveguide (1 mm in diameter and 40 mm long) can be excited between 20 kHz to 2 MHz. From 20 kHz to 0.4 MHz, the maximum peak vibration velocity was 7.5 m/s; from 1 MHz to 2 MHz, the maximum peak vibration velocity of hard-type PZT DPLUS (7 m/s) was 3.5 times of soft-type piezoelectric materials DPLUS (2 m/s). Acoustic evaluation revealed large acoustic pressure at a wide frequency range: 0.46 MPa (at 31 kHz), 10 MPa (at 590 kHz), 7.7 MPa (at 1.154 MHz), and 7.2 MPa (at 1.322 MHz). Results proved wide-frequency and high-power operation of DPLUS, which are significant for realizing various applications.
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