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1. (WO2018143757) METHOD FOR MANUFACTURING ULTRASONIC EMITTER AND EMITTER PLATE FOR ULTRASONIC EMITTER

Pub. No.:    WO/2018/143757    International Application No.:    PCT/KR2018/001535
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Wed Feb 07 00:59:59 CET 2018
IPC: A61B 8/00
Applicants: POSTECH ACADEMY-INDUSTRY FOUNDATION
포항공과대학교 산학협력단
Inventors: MOON, Won Kyu
문원규
KIM, Chayeong
김차영
HWANG, Yong Hwan
황용환
Title: METHOD FOR MANUFACTURING ULTRASONIC EMITTER AND EMITTER PLATE FOR ULTRASONIC EMITTER
Abstract:
An ultrasonic emitter according to an embodiment of the present invention includes a transducer, a mechanical amplification part, and an emitter plate. The transducer is coupled to a piezoelectric element and converts an inputted electrical signal into a mechanical vibration signal of the piezoelectric element. The mechanical amplification part amplifies the vibration of the piezoelectric element. The emitter plate includes a metal plate and a plurality of convex portions disposed on the emission surface of the metal plate, and receives the vibration signal amplified from the mechanical amplification part and emits ultrasonic waves into the air. The plurality of convex portions contain a polymer material, have a thickness greater than the thickness of the metal plate, and satisfy density and Young's modulus conditions at which the error rate of the natural frequency of the metal plate and the natural frequency of the emitter plate is no greater than 5%.