METHOD FOR MANUFACTURING ULTRASONIC EMITTER AND EMITTER PLATE FOR ULTRASONIC EMITTER

• Main Authors: KIM, Chayeong, MOON, Won Kyu, HWANG, Yong Hwan
• Format: Patent
• Language: English; French; Korean
• Published: 09.08.2018
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

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%. Un émetteur ultrasonore selon un mode de réalisation de la présente invention comprend un transducteur, une partie d'amplification mécanique et une plaque émettrice. Le transducteur est couplé à un élément piézoélectrique et convertit un signal électrique entré en un signal de vibration mécanique de l'élément piézoélectrique. La partie d'amplification mécanique amplifie la vibration de l'élément piézoélectrique. La plaque émettrice comprend une plaque métallique et une pluralité de parties convexes disposées sur la surface d'émission de la plaque métallique, et reçoit le signal de vibration amplifié par la partie d'amplification mécanique et émet des ondes ultrasonores dans l'air. La pluralité de parties convexes contiennent un matériau polymère, ont une épaisseur supérieure à l'épaisseur de la plaque métallique, et satisfont les conditions de densité et de module d'Young auxquelles le taux d'erreur de la fréquence naturelle de la plaque métallique et la fréquence naturelle de la plaque d'émetteur n'est pas supérieur à 5 %. 본 발명의 일 실시예에 따른 초음파 방사기는 트랜스듀서, 기계적 증폭부, 및 방사판을 포함한다. 트랜스듀서는 압전 소자와 결합되며, 입력된 전기적 신호를 압전 소자의 기계적 진동 신호로 변환한다. 기계적 증폭부는 압전 소자의 진동을 증폭시킨다. 방사판은 금속판과, 금속판의 방사면에 위치하는 복수의 철부를 포함하며, 기계적 증폭부로부터 증폭된 진동 신호를 받아 공기 중으로 초음파를 방사한다. 복수의 철부는 고분자 물질을 포함하고, 금속판의 두께보다 큰 두께를 가지며, 금속판의 고유 진동수와 방사판의 고유 진동수의 오차율이 5% 이하가 되는 영률과 밀도 조건을 만족한다.