DocumentCode :
691309
Title :
Analysis of double-excited piezoelectric Tonpilz transducer
Author :
Zhi-qiang Li ; Xi-ping Mo ; Ying-ming Li ; Yao-zong Pan
Author_Institution :
Inst. of Acoust., Beijing, China
fYear :
2013
fDate :
25-27 Oct. 2013
Firstpage :
1
Lastpage :
4
Abstract :
The piezoelectric Tonpilz transducer has many obvious advantages, such as simple structure, high electro-acoustic transforming efficiency, and high transmitting power. Its usefulness is limited because of its high mechanical quality factor Q. Transducer of Tonpilz type with double excitations has been invented to broaden the operating frequency band by stimulating two adjacent longitudinal vibration modes. However, the peak and valley level of transmitting voltage response (TVR) was hard to be less than 3dB without matching layers. Modulation of the added mass in the pzt-4 ceramics helps get near the first two longitudinal resonant modes, while the length and radiating area of head plate influence the bending modes and radiation quality factor. Double-excited tonpilz transducers which combine the first two longitudinal modes and bending modes were designed with the help of finite element software. By stimulating no less than 3 vibration modes, the -3dB operating bandwidth was much broader than ever before, what´s more, the performance achieved without the help of matching layers.
Keywords :
Q-factor; acoustoelectric transducers; finite element analysis; lead compounds; piezoceramics; piezoelectric transducers; PZT; TVR; adjacent longitudinal vibration modes; bending modes; double-excited piezoelectric Tonpilz transducer; electroacoustic transforming efficiency; finite element software; head plate; longitudinal resonant modes; mechanical quality factor; pzt-4 ceramics; radiation quality factor; simple structure; transmitting power; transmitting voltage response; Broadband; Double-excited; Mid-mass;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA), 2013 Symposium on
Conference_Location :
Changsha
Print_ISBN :
978-1-4799-3289-4
Type :
conf
DOI :
10.1109/SPAWDA.2013.6841096
Filename :
6841096
Link To Document :
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