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    • 33. 发明授权
    • Piezoelectric actuator and sensor for disk drive dual-stage servo systems
    • 用于磁盘驱动双级伺服系统的压电致动器和传感器
    • US07375911B1
    • 2008-05-20
    • US10996543
    • 2004-11-24
    • Yunfeng LiWei GuoLin GuoYu Sun
    • Yunfeng LiWei GuoLin GuoYu Sun
    • G11B21/02G11B5/596G11B17/00G11B33/14G11B21/24
    • G11B19/042G11B5/4826G11B5/483G11B5/5552G11B5/5582G11B5/596
    • A hard disk drive is disclosed comprising at least one disk rotatable about an axis, an actuator assembly moveable relative to the disk, a transducer positioned on the actuator assembly, an actuator signal line, a piezoelectric actuator element disposed on the actuator assembly and electrically interconnected to the actuator signal line, a processor, a sensor signal line and a piezoelectric sensor element for sensing a vibration. The piezoelectric sensor element is collocated with the piezoelectric actuator element and electrically interconnected to the processor by the sensor signal line. The piezoelectric actuator element is operable to move the at least one transducer relative to a surface of the disk. The piezoelectric sensor element is electrically isolated from the piezoelectric actuator element. A method for detecting a vibration in a hard disk drive actuator assembly is also disclosed.
    • 公开了一种硬盘驱动器,其包括至少一个可围绕轴可旋转的盘,可相对于盘移动的致动器组件,位于致动器组件上的换能器,致动器信号线,设置在致动器组件上的电压互连 致动器信号线,用于感测振动的处理器,传感器信号线和压电传感器元件。 压电传感器元件与压电致动器元件并置,并通过传感器信号线电连接到处理器。 压电致动器元件可操作以相对于盘的表面移动至少一个换能器。 压电传感器元件与压电致动器元件电隔离。 还公开了一种用于检测硬盘驱动器致动器组件中的振动的方法。
    • 39. 发明授权
    • Method and apparatus for determining the pass through flux of magnetic materials
    • 用于确定磁性材料通过通量的方法和装置
    • US06821552B2
    • 2004-11-23
    • US10198296
    • 2002-07-17
    • Yun XuWei GuoStephen Turner
    • Yun XuWei GuoStephen Turner
    • C23C1434
    • G01R33/10
    • The invention includes an apparatus and method for determining the pass through flux of magnetic materials. The apparatus comprises one or more magnetic field sensors arranged in such a way as to collect field strength data in any or all the x, y, z directions. The apparatus also comprises a magnet field source or arrangement of magnet field sources which are placed beneath the material being characterized and includes a mechanism whereby the magnetic material can be mapped by the movement of any one or combination of: magnetic field source or sources, sensors and magnetic material. The invented method comprises the use of various configurations of magnetic sources in order to generate a magnetic field that emulates the open-loop condition found in magnetron sputtering.
    • 本发明包括用于确定磁性材料通过通量的装置和方法。 该装置包括一个或多个磁场传感器,其布置成在任何或所有x,y,z方向上收集场强数据。 该装置还包括磁场源或磁场源的布置,其被放置在被表征的材料之下,并且包括机构,由此磁性材料可以通过以下任何一种或组合的运动来映射:磁场源或传感器 和磁性材料。 本发明的方法包括使用各种结构的磁源,以产生模拟在磁控溅射中发现的开环条件的磁场。