中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

62 records (took 0.017 seconds)

    Method and apparatus for operating a generator supplying a high-frequency power to an ultrasonic transducer
    43.
    发明授权
    Method and apparatus for operating a generator supplying a high-frequency power to an ultrasonic transducer 失效
    用于操作向超声换能器提供高频电力的发电机的方法和装置

    公开(公告)号：US5637947A

    公开(公告)日：1997-06-10

    申请号：US368328

    申请日：1995-01-04

    Applicant: Jurgen Kising ,  Gerd Reitmayer ,  Mato Modric

    Inventor： Jurgen Kising ,  Gerd Reitmayer ,  Mato Modric

    IPC: B23K20/10 ,  B06B1/02 ,  B29C65/08 ,  H01L41/09 ,  H04R3/00 ,  H03L7/00 ,  H03H9/00

    CPC classification number: B29C65/08 ,  B06B1/0253 ,  B29C66/9512 ,  B29C66/9592 ,  B29C66/961 ,  B06B2201/72 ,  B29C66/91231 ,  B29C66/91421 ,  B29C66/919 ,  B29C66/9221 ,  B29C66/92431 ,  B29C66/944 ,  B29C66/9513 ,  B29C66/9516

    Abstract: The invention relates to a method for a unique control of the frequency andutput power of a digital generator, in particular for an ultrasonic welding process. Based on a digital processing, the method according to the present invention compensates not only for variations of the resonant frequency in a broad range, but further provides to control a shifting of the resonant point during the welding process in response to temperature or pressure variations. Power variations caused by variations of the line supply voltage or by the pressure are detected and levelled out by the software. The software monitors the overall operation of in-line machinery, matches its parameters and monitors the complete cycle. The software further ensures an optimum efficiency and effectively protects the end stage against stress caused by high-reactive currents.

    Abstract translation: 本发明涉及用于独特控制数字发生器的频率和输出功率的方法，特别是用于超声波焊接工艺。 基于数字处理，根据本发明的方法不仅补偿了宽范围内的谐振频率的变化，而且还响应于温度或压力变化来控制在焊接过程期间的谐振点的偏移。 由电源电压或压力变化引起的功率变化由软件检测和调平。 该软件监控在线机械的整体运行，匹配其参数并监控整个周期。 该软件进一步确保最佳效率，并有效保护终端免受高电流电流引起的应力。

    Ultrasonic welding
    44.
    发明授权
    Ultrasonic welding 失效
    超声波焊接

    公开(公告)号：US4696708A

    公开(公告)日：1987-09-29

    申请号：US797583

    申请日：1985-11-13

    Applicant: Joseph R. Keller ,  Bruce C. Longenecker

    Inventor： Joseph R. Keller ,  Bruce C. Longenecker

    IPC: B06B1/02 ,  B29C65/00 ,  B29C65/08 ,  G01N29/00

    CPC classification number: B29C66/92211 ,  B06B1/0261 ,  B29C65/08 ,  B29C66/8167 ,  B29C66/961 ,  B06B2201/72 ,  B29C66/8322 ,  B29C66/944

    Abstract: The ultrasonic energy applied to a workpiece to be welded in an ultrasonic welding operation, over a predetermined welding time, is measured by processing the output of a load cell beneath the workpiece to produce a signal voltage for comparison with a predetermined reference voltage corresponding to the accumulated ultrasonic energy that should have been applied to the workpiece during said predetermined time to satisfactorily weld the workpiece. A one-shot timer is started at the commencement of the welding operation. If the comparison reveals that signal voltage has reached the reference voltage before the timer has run out, a success signal is generated to indicate the completion of the welding operation.

    Abstract translation: 通过处理工件下方的测力传感器的输出来测量在预定焊接时间内在超声波焊接操作中施加到待焊接的工件的超声能量，以产生用于与对应于工件的预定参考电压进行比较的信号电压 在所述预定时间期间应该施加到工件上的超声能量累积以使工件满意地焊接。 在焊接操作开始时开始一次性定时器。 如果比较显示在定时器耗尽之前信号电压已经达到参考电压，则产生成功信号以指示焊接操作的完成。

    Method and generator for characterizing an oscillatory system
    46.
    发明授权
    Method and generator for characterizing an oscillatory system 有权

    公开(公告)号：US12072363B2

    公开(公告)日：2024-08-27

    申请号：US17626615

    申请日：2020-07-15

    Applicant: Herrmann Ultraschalltechnik Gmbh & Co. KG

    Inventor： Gabriel Ertz ,  Jens Twiefel ,  Jorg Wallaschek

    IPC: G01R29/22 ,  B06B1/02 ,  B06B1/06 ,  G01R27/26

    CPC classification number: G01R27/2605 ,  B06B1/0253 ,  B06B1/06 ,  B06B2201/72

    Abstract: The present invention relates to a method for determining at least one physical characteristic value of an electromechanical oscillatory system, which comprises a piezoelectric element and at least one additional element coupled, with respect to oscillation, to the piezoelectric element, the piezoelectric element having an electrode and a counter electrode. The method comprises the following steps: (a) applying an electrical alternating voltage between the electrode and the counter electrode for the duration of an excitation interval in order to induce mechanical oscillation of the oscillatory system or of a sub-system of the oscillatory system, so that after the excitation interval has expired, the oscillatory system or the sub-system performs a free oscillation without excitation, (b) after the end of the excitation and during the free oscillation of the oscillatory system or of the sub-system without excitation: (i) measuring a time curve of a voltage U between the electrode and the counter electrode, or (ii) short-circuiting the electrode and the counter electrode with a line and measuring a time curve of a current I through the line, and (c) determining the at least one physical characteristic value of the electromechanical oscillatory system from the time curve of the voltage U, which time curve was measured in step b) i), or the time curve of the current I, which time curve was measured in step b) ii).

    RESONANCE METHOD FOR A VIBRATION SYSTEM, A CONVERTER, AN EXCITATION UNIT AND THE VIBRATION SYSTEM
    47.
    发明公开
    RESONANCE METHOD FOR A VIBRATION SYSTEM, A CONVERTER, AN EXCITATION UNIT AND THE VIBRATION SYSTEM 审中-公开

    公开(公告)号：US20230311159A1

    公开(公告)日：2023-10-05

    申请号：US18023642

    申请日：2021-08-16

    Applicant: Siemens Aktiengesellschaft

    Inventor： Christoph Fritsch ,  THEO RICHTER ,  MARTIN STREUBÜHR ,  BERND WEDEL

    IPC: B06B1/02 ,  B06B1/04

    CPC classification number: B06B1/0246 ,  B06B1/045 ,  B06B2201/72

    Abstract: A resonance method for a vibration system for resonant vibration of an excitation unit having a vibrating mass includes detecting a deflection of the vibrating mass, differentiating the deflection to form a velocity of the vibrating mass; generating from the deflection and the velocity a mechanical phase position; forming from the mechanical phase position a corrected phase position by using a correction value; forming, based on the corrected phase position, an electrical angular frequency with a P-regulation; integrating the electrical angular frequency to determine an electrical phase position; forming from the electrical phase position a correction factor by using a trigonometric function; and applying the correction factor to an excitation setpoint value to generate a corrected excitation setpoint value. Also disclosed are a converter, an excitation unit having the converter, and a vibration system having the excitation unit and the vibrating mass.

    Device for the ultrasonic processing of materials having a trigger apparatus
    49.
    发明授权
    Device for the ultrasonic processing of materials having a trigger apparatus 有权

    公开(公告)号：US09833946B2

    公开(公告)日：2017-12-05

    申请号：US15312334

    申请日：2015-07-20

    Applicant: Herrmann Ultraschalltechnik GmbH & Co. KG

    Inventor： Gerhard Gnad

    IPC: B32B37/00 ,  B29C65/08 ,  B29C65/00

    CPC classification number: B29C65/085 ,  B06B1/0246 ,  B06B3/00 ,  B06B2201/72 ,  B29C65/086 ,  B29C65/087 ,  B29C66/1122 ,  B29C66/43 ,  B29C66/83511 ,  B29C66/83513 ,  B29C66/9221 ,  B29C66/92921 ,  B29C66/961 ,  B29C66/962

    Abstract: The present invention relates to a device for the ultrasonic processing of materials, which has an ultrasonic processing system, which comprises: an ultrasound generator, a converter (12), a sonotrode (16), and a counter tool (18); wherein the sonotrode (16) and/or the counter tool (18) has a substantially cylindrical sealing surface having at least one elevation (45) and can be rotated such that, during the processing, the elevation (45) rotates about the axis of rotation and comes in contact with the material web (20) during a sealing time, wherein a control apparatus (24) is provided for the ultrasound generator, to which control apparatus a feedback variable from the ultrasound processing system is fed and which control apparatus determines a manipulated variable therefrom and feeds said manipulated variable to the ultrasound generator, wherein a process variable from the processing process is determined and is linked to the manipulated variable determined by the control apparatus (24) before the feeding to the ultrasound generator. In order to provide an improved device for the ultrasonic processing of materials having an ultrasonic processing system, a trigger apparatus (44) is provided, which determines the position of the elevation (45) and is designed to permit or prevent the linking of the process variable to the manipulated variable in accordance with the position determination.

    METHODS OF DRIVING POLARIZATION INVERSION IN FERROELECTRIC MATERIALS AND DEVICES
    50.
    发明申请
    METHODS OF DRIVING POLARIZATION INVERSION IN FERROELECTRIC MATERIALS AND DEVICES 审中-公开
    在电磁材料和器件中驱动极化反相的方法

    公开(公告)号：US20160288166A1

    公开(公告)日：2016-10-06

    申请号：US15037719

    申请日：2014-11-21

    Applicant: THUNDER BAY REGIONAL RESEARCH INSTITUTE

    Inventor： Oleg RUBEL ,  Samuel PICHARDO ,  Laura CURIEL ,  Sheikh Jamil AHMED ,  Jeremy COLE

    IPC: B06B1/06 ,  H01L41/09 ,  H01L41/04 ,  B06B1/02 ,  H01L41/047

    CPC classification number: B06B1/06 ,  A61B8/12 ,  A61B8/4483 ,  A61B8/546 ,  A61N7/00 ,  A61N2007/0043 ,  B06B1/0207 ,  B06B1/0215 ,  B06B1/0238 ,  B06B2201/71 ,  B06B2201/72 ,  B06B2201/76 ,  B08B3/12 ,  H01L41/042 ,  H01L41/047 ,  H01L41/09

    Abstract: Methods and devices are described for driving ferroelectric perovskite oxide crystals to achieve polarization inversion with reduced coercivity. In some embodiments, the anisotropy in the potential energy surface of a ferroelectric material is employed to drive polarization inversion and switching with a reduced coercive field relative to uniaxial excitation. In some embodiments, polarization inversion with reduced coercivity is produced via the application of an electric field that exhibits a time-dependent orientation, in contrast with conventional uniaxial electrical excitation, thereby causing the central ion (and the crystal structure as a whole) to evolve along a lower-energy path, in which the central ion is driven such that it avoids the potential energy maximum. This may be achieved, for example, by applying at least two non-parallel time-dependent voltages (e.g. bias, potential) such that orientation of the electric field changes with time during the switching cycle.

    Abstract translation: 描述了用于驱动铁电钙钛矿氧化物晶体以降低矫顽力的极化反转的方法和装置。 在一些实施例中，铁电材料的势能表面中的各向异性用于驱动极化反转和相对于单轴激励的减小的矫顽场的切换。 在一些实施例中，与传统的单轴电激励相反，通过施加呈现时间依赖取向的电场产生具有降低的矫顽力的极化反转，从而使中心离子（和晶体结构整体）放出 沿着较低能量的路径，其中中心离子被驱动，使得其避免了最大的势能。 这可以通过例如通过施加至少两个不平行的时间相关电压（例如偏置，电位）来实现，使得电场的取向在开关周期期间随时间而变化。

Patent Agency Ranking