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公开(公告)号：US07738153B2
公开(公告)日：2010-06-15
申请号：US11851413
申请日：2007-09-07
申请人： Rodney C. Harris , Keith W. Malang
发明人： Rodney C. Harris , Keith W. Malang
IPC分类号： G02B26/08
CPC分类号： G02B26/101 , G11B7/0065 , G11B7/08547
摘要： The present invention provides a scanner comprising: a base member; a scanning beam reflective member having a first tilt axis and a second tilt axis orthogonal to the first tilt axis; a mounting assembly for mounting the scanning beam reflective member on the base member for tilting of thereof along the first and second tilt axes; an actuator for tilting the scanning beam reflective member along the first and second tilt axes to provide a tilt orientation; a magnet assembly which generates one or more magnetic fields which are responsive and correlated to the tilt orientation; and a magnetic field sensor assembly for sensing the magnetic fields generated by the magnet assembly to thereby indicate the tilt orientation. The mounting assembly may comprise a suspension assembly having a tilt imparting assembly for imparting tilt to the reflective member, and a reflective member holder assembly for holding the reflective member.
摘要翻译： 本发明提供了一种扫描器，包括：基座构件; 扫描光束反射部件，具有与第一倾斜轴正交的第一倾斜轴和第二倾斜轴; 安装组件，用于将扫描光束反射构件安装在基座构件上，用于沿着第一和第二倾斜轴线倾斜; 致动器，用于沿着第一和第二倾斜轴倾斜扫描光束反射构件以提供倾斜取向; 磁体组件，其产生响应并与倾斜取向相关联的一个或多个磁场; 以及用于感测由磁体组件产生的磁场从而指示倾斜取向的磁场传感器组件。 安装组件可以包括具有用于向反射构件施加倾斜的倾斜赋予组件的悬架组件和用于保持反射构件的反射构件保持器组件。
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公开(公告)号：US07638755B2
公开(公告)日：2009-12-29
申请号：US12113516
申请日：2008-05-01
IPC分类号： G01D5/34
CPC分类号： G11B7/0065 , G11B7/007 , G11B7/09 , Y10T74/20335
摘要： In one aspect of the present invention, a device for sensing an absolute position of an encoded object, comprising: a position tracking module comprising: a track illumination module configured to illuminate the encoded object with one more light beams, and to detect one or more light beams resulting from said illumination of said encoded object; and an absolute position determinator configured to determine the absolute position of the encoded object based on said one or more light beams resulting from said illumination of said encoded object.
摘要翻译： 在本发明的一个方面，一种用于感测编码对象的绝对位置的装置，包括：位置跟踪模块，包括：轨道照明模块，配置成用一个或多个光束照射编码对象，并且检测一个或多个 由所述编码对象的所述照明产生的光束; 以及绝对位置确定器，被配置为基于由所述编码对象的所述照明产生的所述一个或多个光束来确定编码对象的绝对位置。
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13.发明授权Closed loop charge mode drive for piezo actuators using a DC restore amplifier 有权使用直流恢复放大器的压电执行器的闭环充电模式驱动公开(公告)号：US06795265B2
公开(公告)日：2004-09-21
申请号：US09877675
申请日：2001-06-08
IPC分类号： G11B5596
CPC分类号： H01L41/042
摘要： A piezo actuator drive circuit (40) adapted to operate in both a charge mode and a voltage mode. A low frequency compensation loop (44) is formed from a piezo actuator output (OUT6XP) of a driver (42) to the input thereof. The resulting closed loop system produces charge mode operation within a bandpass that can be tuned for desired operation. Below the bandpass turn on frequency (Fh) the closed loop system restores the piezo output (OUT6XP) to a defined DC voltage and compensates for any wandering effects, such as DC current mismatches in the closed loop configuration, such that the piezo output is centered around the desired DC operating point. The circuit is further provided with a DC restore feature in combination with the feedback which allows for a low frequency DC coupled path and thus allows for the DC positioning of the piezo in the charge mode to be changed. The DC restoring amplifier is used to compensate for offsets in the amplifier chain. The DC restore amplifier ensures the overall circuit is balanced and that the charge mode operation is maintained. The circuit is particularly adapted to drive a varying number of multiple piezo actuators.
摘要翻译： 一种适于在充电模式和电压模式下操作的压电致动器驱动电路（40）。 低频补偿回路（44）由驱动器（42）的压电致动器输出（OUT6XP）到其输入端形成。 所产生的闭环系统在可以调谐到期望的操作的带通内产生充电模式操作。 在带通开启频率（Fh）之下，闭环系统将压电输出（OUT6XP）恢复到定义的直流电压，并补偿任何漂移效应，如闭环配置中的直流电流失配，使得压电输出居中 围绕期望的直流工作点。 该电路还具有与反馈相结合的DC恢复特征，其允许低频DC耦合路径，从而允许改变充电模式中的压电体的DC定位。 直流恢复放大器用于补偿放大器链中的偏移。 直流恢复放大器确保整个电路平衡，并保持充电模式操作。 该电路特别适于驱动不同数量的多个压电致动器。
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公开(公告)号：US5774299A
公开(公告)日：1998-06-30
申请号：US696120
申请日：1996-08-13
CPC分类号： G11B5/59622 , G11B21/106 , G11B5/59627 , G11B5/59644
摘要： The track follow gain control of an actuator controller is calibrated by injecting a sinusoidal signal into the position error signal during a servo burst interrupt. The injected signal is bandpass filtered to optimize the coherence of the measurement. A sine error signal is derived based on the filtered (sine actual) signal and a sine desired signal. The sine error signal is applied to the track follow gain control to adjust the amplitude of the control signal to the actuator based on the sine error signal. The sine error is derived by averaging the peaks of the filtered injected signal and subtracting the averaged signal from the desired signal which represents the expected error of the sinusoidal signal under ideal conditions. The recording surfaces may be segmented into a plurality of radial zones in which case a central track is identified in one zone on a selected disc surface. The sine error signal is derived for that zone, after which the process is repeated for the corresponding zone of each other recording surface. The sine error signals derived from the several disc surfaces are averaged to adjust the track follow gain control for the common zone of all disc surfaces.
摘要翻译： 通过在伺服突发中断期间将正弦信号注入位置误差信号来校准致动器控制器的跟踪增益控制。 被注入的信号被带通滤波以优化测量的相干性。 基于滤波（正弦实际）信号和正弦期望信号导出正弦误差信号。 正弦误差信号被施加到跟踪跟随增益控制，以基于正弦误差信号来调节到致动器的控制信号的幅度。 正弦误差是通过对滤波后的注入信号的峰值进行平均而从理想条件下的正弦信号的期望误差的期望信号中减去平均信号得到的。 记录表面可以被分割成多个径向区域，在这种情况下，在所选择的盘表面上的一个区域中识别出中心轨迹。 对于该区域导出正弦误差信号，之后对每个其他记录表面的相应区域重复该过程。 从几个盘表面导出的正弦误差信号被平均以调整所有盘表面的公共区域的跟踪增益控制。
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公开(公告)号：US5079487A
公开(公告)日：1992-01-07
申请号：US450627
申请日：1989-12-14
申请人： Keith W. Malang
发明人： Keith W. Malang
摘要： The present invention provides an apparatus and method for commutating a brushless DC motor that prevents backdriving or spiking, due to energy stored in the coils of the bridge of the brushless DC motor, of a DC power supply providing current to the DC motor.
摘要翻译： 本发明提供一种用于整流无刷直流电动机的装置和方法，该装置和方法由于存储在无刷直流电动机的桥的线圈中的能量而防止向DC电动机提供电流的直流电源的反向驱动或加速。
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