Hard-Type Piezoelectric Materials Based Double-Parabolic-Reflectors Ultrasonic Transducer (DPLUS) for High-Power Ultrasound
Hard-Type Piezoelectric Materials Based Double-Parabolic-Reflectors Ultrasonic Transducer (DPLUS) for High-Power Ultrasound
复制标题
用于高功率超声的基于硬质压电材料的双抛物面反射器超声换能器 (DPLUS)
DOI：
10.1109/access.2022.3156609
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发表时间：
2022
期刊：
影响因子：
3.9
通讯作者：
Morita Takeshi
中科院分区：
文献类型：
--
作者：
Chen Kang;Irie Takasuke;Iijima Takashi;Kasashima Takashi;Yokoyama Kota;Miyake Susumu;Morita Takeshi
为了实现双抛物面反射波导超声波换能器（DPLUS）的宽频率（20 kHz-2 MHz）高功率输出（10 MPa），本文研究了采用硬质PZT的DPLUS。在 DPLUS 波导的谐振激励下，可以在 20 kHz 至 2 MHz 之间激励来自薄波导（直径 1 mm，长 40 mm）的约 30 个谐波纵模。从20 kHz到0.4 MHz，最大峰值振动速度为7.5 m/s；从1 MHz到2 MHz，硬型PZT DPLUS的最大峰值振动速度（7 m/s）是软型压电材料DPLUS（2 m/s）的3.5倍。声学评估显示在较宽的频率范围内具有较大的声压：0.46 MPa（31 kHz）、10 MPa（590 kHz）、7.7 MPa（1.154 MHz）和7.2 MPa（1.322 MHz）。结果证明了DPLUS的宽频率和高功率运行，这对于实现各种应用具有重要意义。
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.