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    Remote preamplifier and impedance matching circuit for electromagnetic acoustic transducer
    11.
    发明授权
    Remote preamplifier and impedance matching circuit for electromagnetic acoustic transducer 失效
    遥控前置放大器和阻抗匹配电路用于电磁换能器

    公开(公告)号：US5511424A

    公开(公告)日：1996-04-30

    申请号：US196661

    申请日：1994-02-15

    Applicant: Daniel T. MacLauchlan ,  Karl C. Henderson ,  John H. Flora

    Inventor： Daniel T. MacLauchlan ,  Karl C. Henderson ,  John H. Flora

    IPC: B06B1/02 ,  B06B1/04 ,  G01N29/22 ,  G01N29/24 ,  G01N29/34 ,  G01N29/36 ,  G01N29/04

    CPC classification number: G01N29/34 ,  B06B1/0207 ,  B06B1/04 ,  G01N29/22 ,  G01N29/2412 ,  G01N29/36 ,  B06B2201/58

    Abstract: A preamplification and impedance matching circuit for an electromagnetic acoustic transducer includes an impedance matching section of the circuit having input terminals for receiving radio frequency power from a radio frequency power source. A matching transformer, which is a step-down transformer, is operatively connected to the input terminals. Diode networks are operatively connected to the matching transformer and output terminals which lead to the coil of the transducer. Signal responses emitted by the transducer coil are transmitted to a preamplifier section of the circuit. Choke coils or resistors are used to limit radio frequency power entry into the preamplifier section of the circuit. The preamplifier section has a preamplifier which is operatively connected to a first transformer and a second transformer such that the transformer are located on opposite sides of the preamplifier for increasing the amplitude of the coil signal response prior to transmission to detectors located in the instrumentation of the transducer.

    Abstract translation: 用于电磁声换能器的前置放大和阻抗匹配电路包括具有用于从射频电源接收射频功率的输入端的电路的阻抗匹配部分。 作为降压变压器的匹配变压器可操作地连接到输入端子。 二极管网络可操作地连接到匹配的变压器和输出端子，其通向换能器的线圈。 由换能器线圈发出的信号响应被传送到电路的前置放大器部分。 扼流线圈或电阻用于限制射频功率进入电路的前置放大器部分。 前置放大器部分具有前置放大器，其可操作地连接到第一变压器和第二变压器，使得变压器位于前置放大器的相对侧，用于在传输到位于仪器的检测器中的检测器之前增加线圈信号响应的幅度 传感器。

    Oscillating circuit for ultrasonic dental scaler
    12.
    发明授权
    Oscillating circuit for ultrasonic dental scaler 失效
    超声波牙齿矫正器振动电路

    公开(公告)号：US5451161A

    公开(公告)日：1995-09-19

    申请号：US110857

    申请日：1993-08-24

    Applicant: Michael Sharp

    Inventor： Michael Sharp

    IPC: A61B17/32 ,  A61C17/20 ,  B06B1/02 ,  A61C1/07 ,  A61C3/03 ,  A61C3/08

    CPC classification number: A61C17/20 ,  A61B17/320068 ,  B06B1/0253 ,  B06B2201/58

    Abstract: A method and apparatus for vibrating a dental scaler insert at its resonant frequency which includes an energizing coil and an automatically tuned oscillating circuit is disclosed. The oscillating circuit is automatically tuned to vibrate a scaler insert at its resonant frequency in response to an impedance of the energizing coil. The energizing coil impedance is responsive to a scaler insert positioned within the energizing coil. Additionally, the dental scaler device can be operated with scaling inserts having different mechanical resonant frequencies associated therewith. Accordingly, dental scaler inserts resonant at about 25kHz or 30kHz may be inserted and operated by the dental scaler device of the present invention. The apparatus for vibrating a dental scaler may also include a feature permitting the operator to temporarily increase an amplitude of vibration of the scaler insert to enable the operator to dislodge stubborn calculus from a patient's teeth.

    Abstract translation: 公开了一种用于以包括激励线圈和自动调谐的振荡电路在其谐振频率振动牙齿切割器插入件的方法和装置。 振荡电路被自动调谐以响应于激励线圈的阻抗以其谐振频率振动定标插入件。 激励线圈阻抗响应于位于激励线圈内的定标器插入件。 此外，牙科定标器装置可以与具有与其相关联的不同机械共振频率的定标插入物操作。 因此，可以通过本发明的牙齿矫正器装置插入和操作约25kHz或30kHz的共振的牙齿矫正器插入物。 用于振动牙齿矫正器的装置还可以包括允许操作者临时增加定标器插入件的振动幅度以使操作者能够从患者牙齿上移除顽固结石的特征。

    Ultrasonic generators
    13.
    发明授权
    Ultrasonic generators 失效
    超声波发生器

    公开(公告)号：US3694713A

    公开(公告)日：1972-09-26

    申请号：US3694713D

    申请日：1970-03-06

    Applicant: AMLAB AB

    Inventor： DUREN LENNART AXEL ,  ANDERSSON ARNE

    IPC: B06B1/02 ,  H02B9/00

    CPC classification number: B06B1/0253 ,  B06B2201/55 ,  B06B2201/58 ,  B06B2201/76

    Abstract: An ultrasonic generator including an amplifier coupled in oscillator configuration for initiating via an exciting impedance ultrasonic vibrations in an electro-acoustic element such as that associated with a dental instrument. Connected in parallel with the exciting impedance in an additional impedance to form a tuned parallel resonance circuit. Maximum current is supplied to the exciting impedance through the amplifier and the primary winding of a current transformer also having a secondary winding connected in series with a capacitor to form a tuned series resonance circuit additionally emphasizing the maximum current. The transformer forms an inductive coupling in phase-aiding relationship between the output circuit of the amplifier and the control electrode thereof for continuously maintaining optimal effect at the prevailing resonance frequency with an automatic adaptation of the oscillation frequency to variations from the nominal mechanical resonance frequency of the electro-acoustic element.

    Abstract translation: 一种超声波发生器，包括以振荡器配置耦合的放大器，用于通过诸如与牙科仪器相关联的电声元件中的激发阻抗超声波振动来启动。 与一个附加阻抗的激励阻抗并联连接，形成调谐的并联谐振电路。 通过放大器和电流互感器的初级绕组提供最大电流，该电流互感器还具有与电容器串联连接的次级绕组，以形成另外强调最大电流的调谐串联谐振电路。 变压器在放大器的输出电路与其控制电极之间形成一个电感耦合，用于在主要谐振频率下连续保持最佳效应，并将振荡频率自动调整为与标称机械谐振频率 电声元件。

    Damping and actuating apparatus comprising magnetostrictive material, a vibration dampening device and use of said apparatus
    19.
    发明申请
    Damping and actuating apparatus comprising magnetostrictive material, a vibration dampening device and use of said apparatus 审中-公开
    包括磁致伸缩材料的阻尼和致动装置，减振装置以及所述装置的使用

    公开(公告)号：US20060144472A1

    公开(公告)日：2006-07-06

    申请号：US10547880

    申请日：2004-03-03

    Applicant: Kari Ullakko ,  Juhani Tellinen

    Inventor： Kari Ullakko ,  Juhani Tellinen

    IPC: H01F1/03

    CPC classification number: F16F15/005 ,  B06B1/045 ,  B06B2201/58 ,  B06B2201/70 ,  G10K11/16 ,  G10K11/178 ,  G10K2210/10 ,  G10K2210/116 ,  G10K2210/121 ,  G10K2210/321 ,  G10K2210/32121 ,  G10K2210/3223 ,  G10K2210/3224 ,  G10K2210/3228 ,  G10K2210/3229 ,  G10K2210/507 ,  G10K2210/509 ,  H01L41/12

    Abstract: The invention relates to devices that produce displacements and/or forces (defined as actuators), when a magnetic field source(s) is (are) placed in such a way that the resulting magnetic field is of suitable strength and orientation in relation to the actuating element made from a Magneto-Mechanical Adaptive (MMA) material, so as to produce the desired displacement of the MMA element; or to devices that dampen mechanical vibrations by absorbing the vibration energy into an MMA element and/or by converting the vibration energy into electric power in the device and/or senses displacement velocity or acceleration. The electric energy can be dissipated to heat or led out from the device. In the latter case, the device works as a power generator. The principle of using the devices as sensors is also described. The MMA material here is defined as a material whose dimensions change when a magnetic field or stress is applied to it, based on twin boundary or austenite-martensite phase boundary motion or magnetostriction.

    Abstract translation: 本发明涉及产生位移和/或力（定义为致动器）的装置，当磁场源被放置成使得所得到的磁场相对于 由MMA材料制成的致动元件，以便产生MMA元件的期望位移; 或者通过将振动能量吸收到MMA元件中和/或通过将振动能量转换成装置中的电力并且/或感测位移速度或加速度来衰减机械振动的装置。 电能可以消散以加热或从设备引出。 在后一种情况下，该装置用作发电机。 还描述了将装置用作传感器的原理。 这里的MMA材料被定义为基于双边界或奥氏体 - 马氏体相边界运动或磁致伸缩而施加磁场或应力的尺寸变化的材料。

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