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    ACOUSTIC TRANSDUCER
    161.
    发明公开
    ACOUSTIC TRANSDUCER 审中-公开
    声学传感器

    公开(公告)号：EP3274104A1

    公开(公告)日：2018-01-31

    申请号：EP16712401.5

    申请日：2016-03-16

    Applicant: BAE Systems PLC

    Inventor： KENT, Lionel,William, John ,  HARPER, Colin James

    IPC: B06B1/02

    CPC classification number: B06B1/0207 ,  B06B2201/55 ,  H04B11/00

    Abstract: Wherein the matching network comprises a temperature compensating capacitor connected in parallel with the piezoelectric element, the temperature compensating capacitor being for counteracting temperature-induced changes to the dielectric constant of the piezoelectric element such that the electrical natural frequency of the transducer is substantially constant over a range of temperatures.

    ULTRASONIC SENSOR DRIVE CIRCUIT
    164.
    发明公开
    ULTRASONIC SENSOR DRIVE CIRCUIT 审中-公开
    换能器驱动电路

    公开(公告)号：EP2848961A4

    公开(公告)日：2016-03-16

    申请号：EP13788264

    申请日：2013-04-26

    Applicant: MURATA MANUFACTURING CO

    Inventor： TAKAHATA SATOSHI

    IPC: G01S7/524 ,  G01S15/10 ,  H04R3/00

    CPC classification number: B06B1/0207 ,  B06B2201/30 ,  B06B2201/55 ,  G01S7/524 ,  G01S15/10 ,  G01S15/104

    Abstract: An ultrasonic sensor (1) includes a signal generation circuit (11), an amplifier (12), and a matching circuit (13) as a transmission-side circuit. The signal generation circuit (11) includes a driving signal generation circuit (111) that generates a driving signal for transmitting ultrasonic waves from an ultrasonic transducer (10) for transmission and reception and a reverberation suppression signal generation circuit (112) that generates a reverberation suppression signal for suppressing reverberation occurring at the ultrasonic transducer (10) from which the ultrasonic waves are transmitted. The reverberation suppression signal generation circuit (111) generates the reverberation suppression signal having a frequency of 1/2 times the frequency of the driving signal and applies the reverberation suppression signal to the ultrasonic transducer (10) at a time delayed from the driving signal by a half wavelength. With the above configuration, an ultrasonic sensor driving circuit capable of reducing the duration of the reverberation occurring at the ultrasonic transducer is provided.

    RAPID PULSE PHACO POWER FOR BURN FREE SURGERY
    169.
    发明授权
    RAPID PULSE PHACO POWER FOR BURN FREE SURGERY 有权
    快速脉冲PHACO功率免烧手术

    公开(公告)号：EP1351631B1

    公开(公告)日：2007-08-15

    申请号：EP02704080.7

    申请日：2002-01-09

    Applicant: Advanced Medical Optics, Inc.

    Inventor： ROCKLEY, Paul, W. ,  KADZIAUSKAS, Kenneth, E. ,  STAGGS, James, W.

    IPC: A61F9/007

    CPC classification number: A61F9/00745 ,  A61B17/320068 ,  A61B2017/0003 ,  A61B2017/00106 ,  A61B2017/00194 ,  A61B2018/00636 ,  A61B2018/00666 ,  A61F9/007 ,  B06B1/0246 ,  B06B1/0253 ,  B06B2201/55 ,  B06B2201/76

    Abstract: Phacoemulsification apparatus includes a phacoemulsification handpiece having a needle and an electrical system for ultrasonically vibrating said needle along with a power source for providing pulsed electrical power source for providing pulsed electrical power to the handpiece electrical system. Irrigation fluid is provided to the handpiece needle and aspirating fluid is removed from the handpiece needle and aspirating fluid is removed from the handpiece needle. A determination of a voltage current phase relationship of the provided electrical power is made and in response thereto a control system varies a power level duty cycle provided to the handpiece electrical system from the power source and/or modify the aspiration flow rate. In addition, a separate input enables manual control of pulse amplitude and the control system in response to a selected amplitude determines a duty cycle of the provided pulsed electrical power.

    Abstract translation: 超声乳化设备包括超声乳化机头，超声乳化机头具有针头和用于超声振动所述针头的电气系统以及用于向手持电气系统提供脉冲电源的脉冲电源的电源。 将灌注液提供给手持件针头，并将吸出液从手持件针头中取出，并将吸出液从手持件针头中取出。 进行所提供的电力的电压电流相位关系的确定，并且响应于此，控制系统改变从电源提供给手持件电气系统的电力电平占空比和/或修改抽吸流率。 另外，单独的输入使得能够手动控制脉冲幅度，并且控制系统响应于所选的幅度来确定所提供的脉冲电力的占空比。

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