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Ultrasonic trance due sir, ultrasonic trance due sir array and ultrasonic device
Ultrasonic trance due sir, ultrasonic trance due sir array and ultrasonic device
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机译:先生超声波tr,先生阵列超声波ultrasonic和超声波装置
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摘要
An ultrasonic device is configured to transmit ultrasonic waves and includes a substrate, a diaphragm and a piezoelectric member and a control unit. The substrate has an opening. The diaphragm covers the opening of the substrate. The piezoelectric member is coupled to the diaphragm and includes a first piezoelectric part and a second piezoelectric part. The control unit controls a voltage applied to the first piezoelectric part to be a vibration voltage and controls a voltage applied to the second piezoelectric part to be a constant voltage when the ultrasonic device transmits the ultrasonic waves.
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