Lin Shuyu
Institute of Applied Acoustics, Shaanxi Normal University, Xian, Shaanxi 710062, PR China.
Ultrasonics. 2006 Dec 22;44 Suppl 1:e545-8. doi: 10.1016/j.ultras.2006.05.120. Epub 2006 Jun 6.
The high power air-coupled compound ultrasonic transducer in flexural vibration is studied. The transducer consists of a sandwich longitudinal piezoelectric transducer and a circular thin plate in flexural vibration. The resonance frequency equation and the equivalent circuit of a circular radiator with clamped boundary condition are derived. The resonance frequency equation and the equivalent circuit of the compound transducer are also obtained. The radiated acoustic field of the circular thin plate radiator is analyzed and the directional pattern is calculated. It can be seen that when the vibrational order of the circular thin plate in flexural vibration is increased, the radiated acoustic field becomes complex.
研究了高功率弯曲振动空气耦合复合超声换能器。该换能器由夹心式纵向压电换能器和弯曲振动的圆形薄板组成。推导了具有夹紧边界条件的圆形辐射器的共振频率方程和等效电路。还得到了复合换能器的共振频率方程和等效电路。分析了圆形薄板辐射器的辐射声场并计算了方向图。可以看出，当弯曲振动的圆形薄板的振动阶数增加时，辐射声场变得复杂。
