Piezoelectric stack transducer

摘要

Provided is a piezoelectric stack transducer. In a transducer portion, a plurality of piezoelectric transducers which output maximum amplitude at different frequencies are continuously stacked. A stacked electrode portion is provided on both surfaces of each of the plurality of continuously stacked piezoelectric transducers and supplies an electric signal so that vibration is generated. In this case, the plurality of piezoelectric transducers have different diameters. According to the present invention, it is possible to implement a piezoelectric stack transducer which exhibits constant amplitude (output) at different frequencies by piezoelectric transducers exhibiting different amplitudes at respective frequencies according to natural frequencies supplementing amplitude of a different piezoelectric transducer.

主权项

1. A piezoelectric stack transducer comprising:
a transducer portion comprising a plurality of piezoelectric transducers, wherein the plurality of piezoelectric transducers are continuously stacked and each of the plurality of piezoelectric transducers has a circular cross-section shape; and a stacked electrode portion coupled to each of the plurality of piezoelectric transducers, wherein the stacked electrode portion supplies an electric signal having a first frequency to all of the plurality of piezoelectric transducers, wherein a natural frequency of each of the plurality of piezoelectric transducers is determined by a diameter of the each of the plurality of piezoelectric transducers, and wherein at least two of the plurality of piezoelectric transducers have different diameters from one another, and the transducer portion outputs a constant amplitude.