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http://dx.doi.org/10.5050/KSNVE.2014.24.10.780

In-plane Vibration Characteristics of Piezoelectric Ring Transducers  

Piao, Chunguang (Soongsil University)
Kim, Jin Oh (Soongsil University)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.24, no.10, 2014 , pp. 780-787 More about this Journal
Abstract
This paper experimentally deals with the vibration characteristics of flat ring transducers used for ultrasonic sensors and actuators. Radial vibration mode, which is the fundamental mode of a thin piezoelectric transducer, was measured by a laser in-plane vibrometer. An impedance analyzer was used to measure natural frequencies. The results measured by experiments verified theoretical predictions. The vibration characteristics of ring transducers were identified according to the outer diameter size. The shape of the fundamental mode is almost uniform but slightly decreases from the inner to the outer circumferential surfaces. The natural frequency of the fundamental mode decreases as the outer diameter increases. It appears that the ring type transducer is suitable to excite uniformly distributed vibration on a flat surface.
Keywords
Piezoelectric Transducer; In-plane Vibration; Impedance Curve; Resonance; Mode Shape;
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