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1. 发明授权

US06774615B2 Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences 失效
标题翻译：谐振频率测量方法通过对偏离轨迹发生次数进行计数来确定谐振频率
公开(公告)号：US06774615B2
公开(公告)日：2004-08-10
申请号：US10056865
申请日：2002-01-25
申请人： Susumu Yoshida , Shuichi Hashimoto , Ryuki Kubohara , Tatsuhiko Kosugi , Takeyori Hara , Yoshiyuki Kagami
发明人： Susumu Yoshida , Shuichi Hashimoto , Ryuki Kubohara , Tatsuhiko Kosugi , Takeyori Hara , Yoshiyuki Kagami
IPC分类号： G06M110
CPC分类号： G11B21/10
摘要： A resonance-frequency measuring method is used for measuring a resonance frequency of an information recording/reproducing device reproducing information recorded on a medium by driving a mechanism unit. The resonance-frequency measuring method comprises the measuring step of applying sine-wave oscillations at different frequencies one by one to the mechanism unit, and counting the number of times information reproduced upon application of each of the sine-wave oscillations differs from information indicating an aimed location, and the resonance-frequency determining step of determining the resonance frequency according to the number of times counted in the measuring step.
摘要翻译：谐振频率测量方法用于通过驱动机构单元来测量记录在介质上的信息记录/再现装置再现信息的共振频率。谐振频率测量方法包括测量步骤，将不同频率的正弦波振荡逐个地施加到机构单元，并且计数在应用每个正弦波振荡时再现的信息的数量不同于指示以及谐振频率确定步骤，用于根据在测量步骤中计数的次数来确定谐振频率。

2. 发明授权

US07164261B2 Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences 失效
标题翻译：谐振频率测量方法通过对偏离轨迹发生次数进行计数来确定谐振频率
公开(公告)号：US07164261B2
公开(公告)日：2007-01-16
申请号：US10824896
申请日：2004-04-15
申请人： Shuichi Hashimoto , Ryuki Kubohara , Tatsuhiko Kosugi , Takeyori Hara , Yoshiyuki Kagami
发明人： Shuichi Hashimoto , Ryuki Kubohara , Tatsuhiko Kosugi , Takeyori Hara , Yoshiyuki Kagami
IPC分类号： G01R23/167 , G01R23/00
CPC分类号： G11B21/10
摘要： A resonance-frequency measuring method is used for measuring a resonance frequency of an information recording/reproducing device reproducing information recorded on a medium by driving a mechanism unit. The resonance-frequency measuring method includes the measuring step of applying sine-wave oscillations at different frequencies one by one to the mechanism unit, and counting the number of times information reproduced upon application of each of the sine-wave oscillations differs from information indicating an aimed location, and the resonance-frequency determining step of determining the resonance frequency according to the number of times counted in the measuring step.
摘要翻译：谐振频率测量方法用于通过驱动机构单元来测量记录在介质上的信息记录/再现装置再现信息的共振频率。谐振频率测量方法包括测量步骤，将不同频率的正弦波振荡逐个地施加到机构单元，并且对施加每个正弦波振荡时再现的信息的计数不同于指示以及谐振频率确定步骤，用于根据在测量步骤中计数的次数来确定谐振频率。

3. 发明授权

US5523900A Head position detecting method and apparatus 失效
标题翻译：头位置检测方法和装置
公开(公告)号：US5523900A
公开(公告)日：1996-06-04
申请号：US194663
申请日：1994-02-08
申请人： Tatsuhiko Kosugi , Shuichi Hashimoto , Toru Shinohara
发明人： Tatsuhiko Kosugi , Shuichi Hashimoto , Toru Shinohara
IPC分类号： G11B19/28 , G11B5/596 , G11B20/14 , G11B20/18 , G11B21/10
CPC分类号： G11B21/106 , G11B5/59616
摘要： A head position detecting method and apparatus for detecting a phase difference from servo data on a recording medium to detect the position of a head. This head position detecting method and apparatus detect the phase differences between the read pulse of the servo data read by the head and reference clocks, and average the phase differences to detect the head position. A training area having a timing signal recorded therein is provided before the servo data on the recording medium. A phase-lock loop circuit for generating reference clocks is synchronized with the timing signal to accurately detect the phase differences. An integrator is used to average the phase differences. This design ensures accurate detection of the head position even under fast seek. Further, a phase difference signal around a target cylinder is obtained by selecting the phase of the reference clock in accordance with the position of the target cylinder.
摘要翻译：一种头位置检测方法和装置，用于检测与记录介质上的伺服数据的相位差以检测头的位置。这种头部位置检测方法和装置检测由头部和参考时钟读取的伺服数据的读取脉冲之间的相位差，并且平均相位差以检测头部位置。在记录介质上的伺服数据之前提供其中记录有定时信号的训练区域。用于产生参考时钟的锁相环电路与定时信号同步，以准确地检测相位差。积分器用于平均相位差。这种设计确保即使在快速寻找下也能准确检测头部位置。此外，通过根据目标气缸的位置选择参考时钟的相位来获得目标气缸周围的相位差信号。

4. 发明授权

US5432659A Magnetic disk unit having a plurality of magnetic heads 失效
标题翻译：具有多个磁头的磁盘单元
公开(公告)号：US5432659A
公开(公告)日：1995-07-11
申请号：US23806
申请日：1993-02-25
申请人： Tatsuhiko Kosugi , Shuichi Hashimoto
发明人： Tatsuhiko Kosugi , Shuichi Hashimoto
IPC分类号： G11B21/08 , G11B5/55 , G11B19/04 , G11B21/10 , G11B5/596 , G11B15/14
CPC分类号： G11B19/04 , G11B5/5534 , G11B5/5565
摘要： In a magnetic disk unit, a magnetic head to be activated is switched from a first magnetic head to a second magnetic head in accordance with an instruction supplied from a host system in a state where a plurality of magnetic heads are positioned at a cylinder on magnetic disks. The magnetic disk unit includes a digital servo controller for monitoring at predetermined intervals whether or not the instruction for the changing of the magnetic head is supplied from the host system, a first output circuit for outputting a first signal for a predetermined time from a time at which the digital servo controller recognizes that the instruction for the changing of the magnetic head is supplied from the host system, and a second output circuit for outputting a second signal at least from a time at which the instruction for the changing of the magnetic head is input to the magnetic disk unit to a time at which the digital servo controller recognizes that the instruction is supplied from the host system. The first signal and the second signal indicate that the magnetic disk unit is busy adjusting the plurality of magnetic heads so that an off-track error of the second magnetic head is cancelled.
摘要翻译：在磁盘单元中，在多个磁头位于磁盘上的磁体的状态下，根据从主机系统提供的指令，将被激活的磁头从第一磁头切换到第二磁头磁盘。磁盘单元包括数字伺服控制器，用于以预定间隔监视是否从主机系统提供用于改变磁头的指令;第一输出电路，用于从第一输出电路输出预定时间数字伺服控制器识别出从主机系统提供改变磁头的指令，以及至少从磁头改变指令的时刻输出第二信号的第二输出电路是输入到磁盘单元到数字伺服控制器识别出从主机系统提供指令的时间。第一信号和第二信号表示磁盘单元忙于调整多个磁头，从而消除第二磁头的偏离磁道误差。

5. 发明授权

US07002769B2 Head control method and recording apparatus 有权
标题翻译：头控制方法和记录装置
公开(公告)号：US07002769B2
公开(公告)日：2006-02-21
申请号：US10920746
申请日：2004-08-18
申请人： Yoshiyuki Kagami , Isamu Tomita , Shuichi Hashimoto
发明人： Yoshiyuki Kagami , Isamu Tomita , Shuichi Hashimoto
IPC分类号： G11B5/596 , G11B21/02
CPC分类号： G11B5/5547 , G11B5/59633 , G11B21/083
摘要： There is provided a head control method controlling move of a head on a discoidal recording medium including the steps of: partitioning the discoidal recording medium which has position information recorded thereon at radially equal spacing into a plurality of zones; and demodulating the position information using a coefficient set for each of the zones.
摘要翻译：提供了一种控制盘在盘形记录介质上的头的移动的头控制方法，包括以下步骤：将其上记录有位置信息的盘状记录介质以径向相等的间隔划分成多个区; 以及使用针对每个区域设置的系数来解调位置信息。

6. 发明申请

US20050057837A1 Eccentricity correction data recording method and recording medium having eccentricity correction data 失效
标题翻译：偏心校正数据记录方法和具有偏心校正数据的记录介质
公开(公告)号：US20050057837A1
公开(公告)日：2005-03-17
申请号：US10784666
申请日：2004-02-23
申请人： Kohei Takamatsu , Yoshiyuki Kagami , Shuichi Hashimoto
发明人： Kohei Takamatsu , Yoshiyuki Kagami , Shuichi Hashimoto
IPC分类号： G11B21/10 , G11B5/00 , G11B5/008 , G11B5/02 , G11B5/024 , G11B5/10 , G11B5/48 , G11B5/596 , G11B5/09
CPC分类号： G11B5/10 , G11B5/00813 , G11B5/02 , G11B5/024 , G11B5/4893 , G11B5/59627 , G11B2005/001
摘要： An eccentricity correction data recording method, a disk-shaped recording medium, a head position control method and an information recording and reproducing apparatus are disclosed for effective eccentricity correction on cylinders of a disk-shaped recording medium. The eccentricity correction data recording method is for position control over a recording and reproducing head on a disk-shaped recording medium having at least one user data recording area to record user data, the method including the step of recording the eccentricity correction data in a user data recording area.
摘要翻译：公开了一种偏心校正数据记录方法，盘形记录介质，磁头位置控制方法和信息记录和再现装置，用于在盘形记录介质的气缸上进行有效的偏心校正。偏心校正数据记录方法是用于在具有至少一个用户数据记录区域的盘形记录介质上对记录和再现头进行位置控制以记录用户数据，该方法包括在用户中记录偏心校正数据的步骤数据记录区。

7. 发明授权

US07365927B2 Eccentricity correction data recording method and recording medium having eccentricity correction data 失效
标题翻译：偏心校正数据记录方法和具有偏心校正数据的记录介质
公开(公告)号：US07365927B2
公开(公告)日：2008-04-29
申请号：US10784666
申请日：2004-02-23
申请人： Kohei Takamatsu , Yoshiyuki Kagami , Shuichi Hashimoto
发明人： Kohei Takamatsu , Yoshiyuki Kagami , Shuichi Hashimoto
IPC分类号： G11B5/09
CPC分类号： G11B5/10 , G11B5/00813 , G11B5/02 , G11B5/024 , G11B5/4893 , G11B5/59627 , G11B2005/001
摘要： An eccentricity correction data recording method, a disk-shaped recording medium, a head position control method and an information recording and reproducing apparatus are disclosed for effective eccentricity correction on cylinders of a disk-shaped recording medium. The eccentricity correction data recording method is for position control over a recording and reproducing head on a disk-shaped recording medium having at least one user data recording area to record user data, the method including the step of recording the eccentricity correction data in a user data recording area.
摘要翻译：公开了一种偏心校正数据记录方法，盘形记录介质，磁头位置控制方法和信息记录和再现装置，用于在盘形记录介质的气缸上进行有效的偏心校正。偏心校正数据记录方法是用于在具有至少一个用户数据记录区域的盘形记录介质上对记录和再现头进行位置控制以记录用户数据，该方法包括在用户中记录偏心校正数据的步骤数据记录区。

8. 发明申请

US20050041322A1 Head control method and recording apparatus 有权
标题翻译：头控制方法和记录装置
公开(公告)号：US20050041322A1
公开(公告)日：2005-02-24
申请号：US10920746
申请日：2004-08-18
申请人： Yoshiyuki Kagami , Isamu Tomita , Shuichi Hashimoto
发明人： Yoshiyuki Kagami , Isamu Tomita , Shuichi Hashimoto
IPC分类号： G11B20/10 , G11B5/55 , G11B5/596 , G11B21/08 , G11B21/10 , G11B21/02
CPC分类号： G11B5/5547 , G11B5/59633 , G11B21/083
摘要： There is provided a head control method controlling move of a head on a discoidal recording medium including the steps of: partitioning the discoidal recording medium which has position information recorded thereon at radially equal spacing into a plurality of zones; and demodulating the position information using a coefficient set for each of the zones.
摘要翻译：提供了一种控制盘在盘形记录介质上的头的移动的头控制方法，包括以下步骤：将其上记录有位置信息的盘状记录介质以径向相等的间隔划分成多个区; 以及使用针对每个区域设置的系数来解调位置信息。

9. 发明授权

US5831787A Head position demodulating method 失效
标题翻译：头位解调方式
公开(公告)号：US5831787A
公开(公告)日：1998-11-03
申请号：US714408
申请日：1996-09-13
申请人： Susumu Yoshida , Shuichi Hashimoto
发明人： Susumu Yoshida , Shuichi Hashimoto
IPC分类号： G11B21/10
CPC分类号： G11B5/5547
摘要： A method of demodulating head position in a disk apparatus in which a head is moved toward a target cylinder using a position detection signal that has been recorded on a disk medium. This method includes the steps of: predicting, at a current sampling point, the position of the head at the next sampling point; moving the head by instructing a current for a motor based upon the predicted position; obtaining a position deviation which indicates deviation from the predicted position to the head position at the next sampling point by reading the position detection signal that has been recorded on the disk medium; demodulating the head position at the next sampling point using the position deviation signal and the predicted position; predicting position of the head at an immediately following sampling point using a value obtained by outputting the difference (traveling velocity) between predicted positions at neighboring sampling points via a first-order low-pass filter, the predicted position, a difference between the predicted position and the head position and the value of the current instructed for the motor, and instructing a current for the motor based upon the predicted position.
摘要翻译：使用已经记录在盘介质上的位置检测信号来解调头部朝向目标柱体移动的盘装置中的头部位置的方法。该方法包括以下步骤：在当前采样点预测头在下一采样点的位置; 通过基于预测位置指示电动机的电流来移动头部; 通过读取已经记录在盘介质上的位置检测信号来获得指示在下一个采样点处从预测位置偏移到头部位置的位置偏差; 使用位置偏差信号和预测位置解调在下一个采样点处的头部位置; 使用通过经由一次低通滤波器输出相邻采样点的预测位置之间的差（行进速度）而获得的值，预测位于紧随其后采样点的头的位置，预测位置，预测位置以及针对电动机指示的电流的位置和电流的值，并且基于预测位置来指示电动机的电流。

10. 发明授权

US5173647A Servo positioning circuit 失效
标题翻译：伺服定位电路
公开(公告)号：US5173647A
公开(公告)日：1992-12-22
申请号：US460519
申请日：1990-01-03
申请人： Shuichi Hashimoto
发明人： Shuichi Hashimoto
IPC分类号： G05D3/12 , G11B5/55 , G11B21/08 , H02P25/06
CPC分类号： G11B5/5547 , G11B21/085
摘要： A servo positioning circuit having a speed detection circuit for detecting a real speed from a position signal from a servo object; a speed error detection circuit for generating an error between a target speed and the real speed; a position error detection circuit for generating a position error signal from the position signal; a switching unit for switching connection of the servo object to the speed error detection circuit or the position error detection circuit; and a main processing unit for generating a target speed in accordance with the position signal and controlling the switching of the switching unit. When the servo object nears a target position, speed control by the speed error detection circuit switches to position control by the position error detection circuit. Further, a speed detection gain adjustment unit is included in the speed detection circuit, and the main processing unit changes the speed detection gain of an speed detection gain adjustment unit in accordance with the amount of difference.

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