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    Spot filmer cassette transport vibration suppression
    1.
    发明授权
    Spot filmer cassette transport vibration suppression 失效
    点胶膜输送振动抑制

    公开(公告)号：US4926455A

    公开(公告)日：1990-05-15

    申请号：US339891

    申请日：1989-04-17

    申请人： Mark Stojkov ,  Patrick M. Flanagan ,  Victor Hrdlicka ,  John Geither ,  Dennis Everett

    发明人： Mark Stojkov ,  Patrick M. Flanagan ,  Victor Hrdlicka ,  John Geither ,  Dennis Everett

    IPC分类号： G03B42/02

    CPC分类号： G03B42/025

    摘要： A system and method is disclosed for minimizing residual vibration of a radiographic system due to rapid movement of a radiographic film cassette between a park and expose position. The cassette is moved by a servo system including a servo motor which is responsive to a voltage input waveform to drive the cassette. A waveform is chosen for the voltage input such that no inpulse derivatives appear until the waveform has been diferentiated at least three times. The primary natural resonant frequency of the system is determined and noted. The duration of the selected input waveform is adjusted such that the frequency spectrum of the adjusted input waveform defines a relative null which approximately coincides with the primary resonant frequency. The amplitude of the voltage input waveform is then further adjusted as a function of the distance to be traveled by the cassette between the park and expose positions. The servo system can optionally be operated over a portion of the cassette transit in a closed loop fashion. In a mechanical embodiment, sinusoidal cassette acceleration can be effected by the use of a mechanical drive linkage coupled between a motor and the cassette, the drive linkage employing a cycloidal cam and associated cam follower to govern the profile of cassette movement.

    摘要翻译： 公开了一种用于使放射线照相系统的残余振动由于放映照相胶片暗盒在公园和曝光位置之间的快速移动而被最小化的系统和方法。 盒式磁带由包括伺服电机的伺服系统移动，伺服电机响应于电压输入波形来驱动盒。 为电压输入选择一个波形，使波形不会出现至少三次，直到波形出现。 确定并记录系统的主要自然共振频率。 调整所选择的输入波形的持续时间，使得经调整的输入波形的频谱定义与初级谐振频率大致一致的相对零点。 电压输入波形的幅度随着进一步的调整，作为由公园和曝光位置之间的磁带行进的距离的函数。 伺服系统可以可选地以闭环方式在盒的一部分上运行。 在机械实施例中，可以通过使用耦合在电动机和盒之间的机械驱动联动装置来实现正弦盒式加速，驱动联动装置采用摆线凸轮和相关联的凸轮从动件来控制磁带盒运动的轮廓。

    Piezoelectric touch probe
    4.
    发明授权
    Piezoelectric touch probe 有权
    压电式探头

    公开(公告)号：US06708420B1

    公开(公告)日：2004-03-23

    申请号：US09226454

    申请日：1999-01-06

    申请人： Patrick M. Flanagan

    发明人： Patrick M. Flanagan

    IPC分类号： G01B300

    CPC分类号： G01B7/012

    摘要： The instant invention is a dynamic piezoelectric touch probe for use with coordinate measurement machines. The touch probe is characterized by five subsystems; (1) piezoelectric vibrator controlled by a self-tuning drive circuit that adjusts operating frequency and amplitude, (2) a high sensitivity, resonant accelerometer unit coupled to the piezoelectric vibrator, (3) a flexible suspension/stylus with transverse resonant frequencies tuned to the operating frequency band of the piezoelectric vibrator, (4) a digital control circuit that automatically sweeps the operating band of the piezoelectric vibrator to (a) detect the resonant frequency of the stylus/suspension, (b) set the drive signal frequency at the resonance of the stylus/suspension and (c) control the drive signal amplitude, and (5) a triaxial load cell system that is useful for detecting excessive low frequency suspension/stylus vibration, and excessive impact force during a touch event.

    摘要翻译： 本发明是一种与坐标测量机一起使用的动态压电式探头。 触摸探针的特点是五个子系统; （1）由调整工作频率和幅度的自调谐驱动电路控制的压电振动器，（2）耦合到压电振动器的高灵敏度谐振加速度计单元，（3）具有调谐到 压电振动器的工作频带，（4）自动扫描压电振动器的工作频带的数字控制电路（a）检测触针/悬架的谐振频率，（b）将驱动信号频率设定在 触针/悬架的共振，（c）控制驱动信号幅度，（5）三轴测力传感器系统，用于检测过低的低频悬架/触针振动，以及触摸事件过程中的冲击力。

    Spot filmer cassette transport vibration support
    7.
    发明授权
    Spot filmer cassette transport vibration support 失效
    现货彩盒运输振动支持

    公开(公告)号：US4872190A

    公开(公告)日：1989-10-03

    申请号：US298339

    申请日：1989-01-13

    申请人： Mark Stojkov ,  Patrick M. Flanagan ,  Victor Hrdlicka ,  John Geither ,  Dennis Everett

    发明人： Mark Stojkov ,  Patrick M. Flanagan ,  Victor Hrdlicka ,  John Geither ,  Dennis Everett

    IPC分类号： G03B42/02

    CPC分类号： G03B42/025

    摘要： A system and method is disclosed for minimizing residual vibration of a radiographic system due to rapid movement of a radiographic film cassette between a park and expose position. The cassette is moved by a servo system including a servo motor which is responsive to a voltage input waveform to drive the cassette. A waveform is chosen for the voltage input such that no impulse derivatives appear until the waveform has been differentiated at least three times. The primary natural resonant frequency of the system is determined and noted. The duration of the selected input waveform is adjusted such that the frequency spectrum of the adjusted input waveform defines a relative null which approximately coincides with the primary resonant frequency. The amplitude of the voltage input waveform is then further adjusted as a function of the distance to be traveled by the cassette between the park and expose positions. The servo system can optionally be operated over a portion of the cassette transit in a closed loop fashion. In a mechanical embodiment, sinusoidal cassette acceleration can be effected by the use of a mechanical drive linkage coupled between a motor and the cassette, the drive linkage employing a cycloidal cam and associated cam follower to govern the profile of cassette movement.

    摘要翻译： 公开了一种用于使放射线照相系统的残余振动由于放映照相胶片暗盒在公园和曝光位置之间的快速移动而被最小化的系统和方法。 盒式磁带由包括伺服电机的伺服系统移动，伺服电机响应于电压输入波形来驱动盒。 为电压输入选择一个波形，使波形不会出现，直到波形至少三分之一为止。 确定并记录系统的主要自然共振频率。 调整所选择的输入波形的持续时间，使得经调整的输入波形的频谱定义与初级谐振频率大致一致的相对零点。 电压输入波形的幅度随着进一步的调整，作为由公园和曝光位置之间的磁带行进的距离的函数。 伺服系统可以可选地以闭环方式在盒的一部分上运行。 在机械实施例中，可以通过使用耦合在电动机和盒之间的机械驱动联动装置来实现正弦盒式加速，驱动联动装置采用摆线凸轮和相关联的凸轮从动件来控制磁带盒运动的轮廓。