A method to depress the transmitting voltage response fluctuation of a double excitation piezoelectric transducer

被引：15
作者：
Deng, Yunyun [1 ]
Zhang, Guangbin [1 ]
Zhang, Xiaofeng [1 ]
机构：
[1] Shaanxi Normal Univ, Coll Phys & Informat Technol, Shaanxi Key Lab Ultrason, Xian 710062, Shaanxi, Peoples R China
来源：
APPLIED ACOUSTICS | 2020年 / 158卷
基金：
中国国家自然科学基金;
关键词：
Double excitation piezoelectric transducer; Broadband; Transmitting voltage response; ACOUSTIC MATCHING LAYERS; BROAD-BAND; ULTRASONIC TRANSDUCERS; DESIGN OPTIMIZATION;
D O I：
10.1016/j.apacoust.2019.107066
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
To depress the fluctuation of the transmitting voltage response (TVR) for a double excitation broadband transducer, an electrical method is proposed in this paper by connecting resistances in series with the upper and lower piezoelectric ceramic stacks of the transducer. The equivalent circuit and the finite element method are used to analyze the effect of the resistances on TVR, and the optimizing values of the resistances connected in series with the piezoelectric ceramic stacks are obtained. The results obtained by equivalent circuit model and finite element simulation show that the fluctuation of the TVR for the double excitation transducer is obviously depressed when resistances are connected in series with the piezoelectric ceramic stacks. Based on the computational results, a double excitation broadband transducer with a working frequency range from 14 kHz to 36 kHz is made, and the TVR of the transducer is measured to validate the proposed method. The experimental results imply that the fluctuation of the TVR within the working frequency band for a double excitation piezoelectric transducer decreased from 12 dB to 7.3 dB. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：6
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