自然科学版
陕西师范大学学报(自然科学版)
物理学
螺旋开槽结构低频换能器的性能分析
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白佳霭 , 张光斌*
(陕西师范大学 物理学与信息技术学院, 陕西 西安 710119)
张光斌,男,教授,研究方向为功率超声及换能器设计。E-mail: guangbinzhang@snnu.edu.cn
摘要:
设计了一种大振幅低频换能器,该换能器由圆柱管、螺杆、压电陶瓷环及后盖板组成,并且在圆柱管表面刻螺旋型槽。利用等效电路法和有限元方法,对换能器的导纳特性及辐射表面的振幅进行分析,得到了圆柱管的螺旋槽数量及后盖板厚度对换能器振动性能的影响。仿真结果表明,对圆柱管进行开槽,能有效减小换能器的工作频率,增大换能器的振幅。
关键词:
低频换能器; 大振幅; 螺旋槽
收稿日期:
2017-11-20
中图分类号:
O426.9
文献标识码:
A
文章编号:
1672-4291(2018)04-0045-05
基金项目:
国家自然科学基金(11674208)
Doi:
Analysis on the low-frequency transducer with spiral grooves structure
BAI Jiaai, ZHANG Guangbin*
(School of Physics and Information Technology, Shaanxi Normal University,Xi′an 710119, Shaanxi, China)
Abstract:
The low-frequency large amplitude ultrasonic transducer is designed.It is composed of a cylindrical tube with spiral groove, screw piezoelectric ceramic ring and back-end mass. By carving spiral grooves on the surface of the cylindrical tube, the transducer can decrease the work frequency and amplify the amplitude on the surface of transducer. Equivalent circuit and finite element method are used to calculate the admittance and vibration amplitude of the transducer. Then the influence of groove numbers and the thickness of back-end mass on transducer are analyzed by finite element method. Simulation results show that the transducer can obtain low work frequency and large vibration amplitude by carving grooves on the tube of the transducer.
KeyWords:
low-frequency transducer; large amplitude; spiral groove