公开(公告)号：US08402303B2

公开(公告)日：2013-03-19

申请号：US13098281

申请日：2011-04-29

申请人： Koichi Wago ,  Sundeep Chauhan ,  David M. Tung

发明人： Koichi Wago ,  Sundeep Chauhan ,  David M. Tung

IPC分类号： G06F1/00 ,  H04L7/00

CPC分类号： H03L7/06 ,  H01J37/3174 ,  H03B21/00 ,  H03L7/08

摘要： The embodiments disclose a method for encoder frequency-shift compensation, including, determining frequency values of an input encoder signal, analyzing an encoder index clock signal and the input encoder signal to determine values of frequency-shifts and compensating for the values of the frequency-shifts to generate a frequency-shift compensated clock.

摘要翻译： 实施例公开了一种用于编码器频移补偿的方法，包括：确定输入编码器信号的频率值，分析编码器索引时钟信号和输入编码器信号，以确定频移的值并补偿频率 - 移位以产生频移补偿时钟。

公开(公告)号：US07050260B1

公开(公告)日：2006-05-23

申请号：US10293904

申请日：2002-11-12

申请人： David M. Tung ,  Lin Guo ,  Don Brunnett

发明人： David M. Tung ,  Lin Guo ,  Don Brunnett

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59666

摘要： A method and apparatus for partial self-servo writing a disk surface in a disk drive using servo wedge propagation is provided. In one embodiment, servo information is written by a servo track writer near an outer diameter of the disk surface. The servo information is grouped into a 1× set of servo information and a 2× set of servo information. The disk drive's read head is used to read the 1× set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 2× set of servo information. Then, the disk drive's read head is used to read the 2× set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 1× set of servo information. The process is repeated on a track-by-track basis until servo information is written from the outer diameter of the disk surface to the inner diameter of the disk surface, as if it was entirely written by a servo track writer.

摘要翻译： 提供了一种使用伺服楔形传播将部分自伺服写入盘驱动器中的盘表面的方法和装置。 在一个实施例中，伺服信息由靠近盘表面的外径的伺服轨迹写入器写入。 伺服信息分为1组伺服信息和2组伺服信息。 磁盘驱动器的读取头用于读取1x组伺服信息，以便将磁盘驱动器的写入头定位成与2组伺服信息径向对齐的伺服信息。 然后，磁盘驱动器的读取头用于读取2组伺服信息，以便将磁盘驱动器的写入头定位成写入与1组伺服信息径向对齐的伺服信息。 在逐个轨道的基础上重复该过程，直到从盘表面的外径到盘表面的内径写入伺服信息为止，就好像完全由伺服记录器写入。

公开(公告)号：US06867949B1

公开(公告)日：2005-03-15

申请号：US10053934

申请日：2002-01-22

申请人： Lin Guo ,  David M. Tung ,  Xiaoping Hu ,  Wei Guo ,  William M. Marvin, Jr. ,  Mark S. Seymour

发明人： Lin Guo ,  David M. Tung ,  Xiaoping Hu ,  Wei Guo ,  William M. Marvin, Jr. ,  Mark S. Seymour

IPC分类号： G11B5/55 ,  G11B5/596

CPC分类号： G11B5/5534 ,  G11B5/59633

摘要： The present invention is directed to a push-pin assembly for use with a positioning arm of a disk drive servo writer. The push-pin assembly promotes vibrational damping between the push-pin assembly and the actuator arm. Push-pin assemblies of the invention generally include a contact pin having a shaft and a contact head. The push-pin assembly also includes a body having a contact pin receptacle recessed into an end so that at least a portion of the contact pin shaft can be disposed in the receptacle. The contact head is thus disposed beyond the end of the body which includes the contact pin receptacle. The push-pin assembly additionally includes a vibration damper disposed between at least a portion of the contact pin shaft and the body.

摘要翻译： 本发明涉及一种与盘驱动伺服写入器的定位臂一起使用的推销组件。 推销组件促进推销组件和致动器臂之间的振动阻尼。 本发明的推销组件通常包括具有轴和接触头的接触销。 推销组件还包括具有凹入到端部中的接触针插座的本体，使得接触针轴的至少一部分可以设置在容座中。 因此，接触头设置在包括接触针座的主体的端部之外。 推针组件还包括设置在接触销轴的至少一部分与主体之间的振动阻尼器。

公开(公告)号：US06977790B1

公开(公告)日：2005-12-20

申请号：US10138035

申请日：2002-05-03

申请人： Yih-Jen D. Chen ,  David M. Tung ,  Lin Guo ,  Wei Guo ,  Bill Wang

发明人： Yih-Jen D. Chen ,  David M. Tung ,  Lin Guo ,  Wei Guo ,  Bill Wang

IPC分类号： G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B21/02

CPC分类号： G11B5/5582 ,  G11B5/4833 ,  G11B5/5569 ,  Y10T29/49025

摘要： An actuator arm assembly has an actuator arm and an actuator for moving the actuator arm whereby the arm assembly experiences vibrations. The actuator has a body with a recess formed therein, and a strain sensor is fitted essentially inside the recess such that the sensor generates signals correlated to the vibrations. This arrangement produces a high gain boost from the strain based sensor, making an amplifier circuit unnecessary. The sensor signals are used to damp the vibrations.

摘要翻译： 致动器臂组件具有致动器臂和用于移动致动器臂的致动器，由此臂组件经受振动。 致动器具有形成在其中的凹部的本体，并且应变传感器基本上适配在凹部内部，使得传感器产生与振动相关的信号。 这种布置从基于应变的传感器产生高增益增益，使放大器电路不必要。 传感器信号用于减震。

公开(公告)号：US20120274371A1

公开(公告)日：2012-11-01

申请号：US13098281

申请日：2011-04-29

申请人： Koichi Wago ,  Sundeep Chauhan ,  David M. Tung

发明人： Koichi Wago ,  Sundeep Chauhan ,  David M. Tung

IPC分类号： H03L7/06

CPC分类号： H03L7/06 ,  H01J37/3174 ,  H03B21/00 ,  H03L7/08

摘要： The embodiments disclose a method for encoder frequency-shift compensation, including, determining frequency values of an input encoder signal, analyzing an encoder index clock signal and the input encoder signal to determine values of frequency-shifts and compensating for the values of the frequency-shifts to generate a frequency-shift compensated clock.

摘要翻译： 实施例公开了一种用于编码器频移补偿的方法，包括：确定输入编码器信号的频率值，分析编码器索引时钟信号和输入编码器信号，以确定频移的值并补偿频率 - 移位以产生频移补偿时钟。

公开(公告)号：US07355808B1

公开(公告)日：2008-04-08

申请号：US11439731

申请日：2006-05-23

申请人： David M. Tung ,  Lin Guo ,  Don Brunnett

发明人： David M. Tung ,  Lin Guo ,  Don Brunnett

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59666

摘要： A method and apparatus for partial self-servo writing a disk surface in a disk drive using servo wedge propagation is provided. In one embodiment, servo information is written by a servo track writer near an outer diameter of the disk surface. The servo information is grouped into a 1x set of servo information and a 2x set of servo information. The disk drive's read head is used to read the 1x set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 2x set of servo information. Then, the disk drive's read head is used to read the 2x set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 1x set of servo information. The process is repeated on a track-by-track basis until servo information is written from the outer diameter of the disk surface to the inner diameter of the disk surface, as if it was entirely written by a servo track writer.

摘要翻译： 提供了一种使用伺服楔形传播将部分自伺服写入盘驱动器中的盘表面的方法和装置。 在一个实施例中，伺服信息由靠近盘表面的外径的伺服轨迹写入器写入。 伺服信息分为1组伺服信息和2组伺服信息。 磁盘驱动器的读取头用于读取1 x组伺服信息，以便将磁盘驱动器的写入头定位成写入与2 x伺服信息集径向对齐的伺服信息。 然后，磁盘驱动器的读取头用于读取2 x组伺服信息，以便将磁盘驱动器的写入头定位成写入与1 x伺服信息集径向对齐的伺服信息。 在逐个轨道的基础上重复该过程，直到从盘表面的外径到盘表面的内径写入伺服信息为止，就好像完全由伺服记录器写入。

公开(公告)号：US6084205A

公开(公告)日：2000-07-04

申请号：US818091

申请日：1997-03-14

申请人： Donald A. Sheaffer ,  Ronald F. Renzi ,  David M. Tung ,  Kevin Schroder

发明人： Donald A. Sheaffer ,  Ronald F. Renzi ,  David M. Tung ,  Kevin Schroder

IPC分类号： B23K9/095

CPC分类号： B23K9/0956

摘要： Method and system for producing high quality welds in welding processes, in general, and gas tungsten arc (GTA) welding, in particular by controlling weld penetration. Light emitted from a weld pool is collected from the backside of a workpiece by optical means during welding and transmitted to a digital video camera for further processing, after the emitted light is first passed through a short wavelength pass filter to remove infrared radiation. By filtering out the infrared component of the light emitted from the backside weld pool image, the present invention provides for the accurate determination of the weld pool boundary. Data from the digital camera is fed to an imaging board which focuses on a 100.times.100 pixel portion of the image. The board performs a thresholding operation and provides this information to a digital signal processor to compute the backside weld pool dimensions and area. This information is used by a control system, in a dynamic feedback mode, to automatically adjust appropriate parameters of a welding system, such as the welding current, to control weld penetration and thus, create a uniform weld bead and high quality weld.

摘要翻译： 一般来说，在焊接工艺中生产高品质焊缝的方法和系统，以及气体钨丝（GTA）焊接，特别是通过控制焊缝穿透。 从焊接池发出的光在焊接期间通过光学装置从工件的背面收集，并且在发射的光首先通过短波长通过滤光器以去除红外辐射之后被传送到数字摄像机进行进一步处理。 通过滤出从背面焊池图像发射的光的红外分量，本发明提供了焊池边界的准确确定。 来自数码相机的数据被馈送到成像板，该成像板聚焦在图像的100×100像素部分上。 板执行阈值操作，并将该信息提供给数字信号处理器，以计算背面焊池尺寸和面积。 该信息由控制系统以动态反馈模式用于自动调整焊接系统的适当参数，例如焊接电流，以控制焊接穿透，从而创建均匀的焊道和高质量的焊缝。