公开(公告)号：US08068308B2

公开(公告)日：2011-11-29

申请号：US12476773

申请日：2009-06-02

申请人： Masao Fujita ,  Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

发明人： Masao Fujita ,  Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

IPC分类号： G11B5/584 ,  G11B21/02

CPC分类号： G11B5/584

摘要： In the apparatus and method of the invention, a servo signal reproduction unit generates a PES from a servo signal reproduced from a magnetic tape, and a frequency conversion unit performs FFT processing of the PES to generate frequency component information. Then, a filter value generation unit generates filter values based on the frequency component information and writes these to a memory. When recording various data signals to the magnetic tape, the filter values are read from the memory and a control filter serving as a notch filter is incorporated into a feedback control for a tracking servo. This enables periodic and narrow-band noise to be removed from a PES, consequently reducing PESs. Accordingly, learning-type optimum notch filter control that allows a magnetic head to follow recording tracks at high speed and with high precision is possible even when the recording track width is reduced and the tape speed is increased.

摘要翻译： 在本发明的装置和方法中，伺服信号再现单元从从磁带再现的伺服信号产生PES，并且频率转换单元执行PES的FFT处理以产生频率分量信息。 然后，滤波器值生成单元基于频率分量信息生成滤波器值，并将其写入存储器。 当将各种数据信号记录到磁带上时，从存储器中读取滤波器值，并且将用作陷波滤波器的控制滤波器并入用于跟踪伺服的反馈控制。 这使得能够从PES去除周期性和窄带噪声，从而减少PES。 因此，即使当记录磁道宽度减小并且磁带速度增加时，也可以使磁头以高速和高精度跟随记录磁道的学习型最佳陷波滤波器控制。

公开(公告)号：US20090296269A1

公开(公告)日：2009-12-03

申请号：US12476773

申请日：2009-06-02

申请人： Masao Fujita ,  Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

发明人： Masao Fujita ,  Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

IPC分类号： G11B5/584

CPC分类号： G11B5/584

摘要： In the apparatus and method of the invention, a servo signal reproduction unit generates a PES from a servo signal reproduced from a magnetic tape, and a frequency conversion unit performs FFT processing of the PES to generate frequency component information. Then, a filter value generation unit generates filter values based on the frequency component information and writes these to a memory. When recording various data signals to the magnetic tape, the filter values are read from the memory and a control filter serving as a notch filter is incorporated into a feedback control for a tracking servo. This enables periodic and narrow-band noise to be removed from a PES, consequently reducing PESs. Accordingly, learning-type optimum notch filter control that allows a magnetic head to follow recording tracks at high speed and with high precision is possible even when the recording track width is reduced and the tape speed is increased.

摘要翻译： 在本发明的装置和方法中，伺服信号再现单元从从磁带再现的伺服信号产生PES，并且频率转换单元执行PES的FFT处理以产生频率分量信息。 然后，滤波器值生成单元基于频率分量信息生成滤波器值，并将其写入存储器。 当将各种数据信号记录到磁带上时，从存储器中读取滤波器值，并且将用作陷波滤波器的控制滤波器并入用于跟踪伺服的反馈控制。 这使得能够从PES去除周期性和窄带噪声，从而减少PES。 因此，即使当记录磁道宽度减小并且磁带速度增加时，也可以使磁头以高速和高精度跟随记录磁道的学习型最佳陷波滤波器控制。

公开(公告)号：US20080123102A1

公开(公告)日：2008-05-29

申请号：US11717672

申请日：2007-03-14

申请人： Masao Fujita ,  Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

发明人： Masao Fujita ,  Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

IPC分类号： G01B9/02 ,  G01B11/02

CPC分类号： G01B11/026 ,  G11B15/62

摘要： An apparatus is provided for measuring a spacing between an object to be measured T and a transparent object 4. The transparent object 4 is disposed, facing a surface of the object to be measured T, light is emitted to impinge through the transparent object 4 onto the object to be measured T, and the spacing is calculated based on an intensity of interference light occurring in a facing portion between the surface of the object to be measured T and the transparent object 4. The apparatus comprises a light source 1 for emitting light, a modulator 2 for modulating an intensity of the emitted light with modulation waves having a predetermined frequency, a sensor 7 for converting the light intensity of the interference light into an electrical signal, and a synchronous demodulator 8 for subjecting the electrical signal to synchronous demodulation using the modulation waves as reference waves.

摘要翻译： 提供了一种用于测量待测物体T与透明物体4之间的间隔的装置。透明物体4被设置为面对待测物体T的表面，发射光以穿过透明物体4撞击到 要测量的对象T，并且基于在待测物体T的表面和透明物体4之间的相对部分中发生的干涉光的强度来计算间距。该装置包括用于发射光的光源1 用于通过具有预定频率的调制波来调制发射光的强度的调制器2，用于将干扰光的光强度转换为电信号的传感器7以及用于对电信号进行同步解调的同步解调器8 使用调制波作为参考波。

公开(公告)号：US20080170328A1

公开(公告)日：2008-07-17

申请号：US11972441

申请日：2008-01-10

申请人： Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

发明人： Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

IPC分类号： G11B5/187

CPC分类号： G11B5/00821 ,  G11B5/1872

摘要： The present invention provides a magnetic head that can sustain favorable head contact even when magnetic tapes having different thicknesses are used. A magnetic head has a sliding surface coming in contact with a moving magnetic tape. An electromagnetic transducing element is disposed in the sliding surface. First edges are formed at each end of the sliding surface in the direction of movement of the magnetic tape. Second edges are formed in positions extended in the direction of movement of the magnetic tape from each end of the sliding surface and come in contact with the magnetic tape.

摘要翻译： 本发明提供了一种磁头，即使当使用具有不同厚度的磁带时，磁头仍能保持良好的磁头接触。 磁头具有与移动的磁带接触的滑动表面。 电磁换能元件设置在滑动面上。 第一边沿磁带的移动方向形成在滑动表面的每一端。 第二边缘形成在磁带从滑动表面的每个端部移动的方向上延伸并与磁带接触的位置。

公开(公告)号：US08310783B2

公开(公告)日：2012-11-13

申请号：US11972441

申请日：2008-01-10

申请人： Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

发明人： Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

IPC分类号： G11B5/255

CPC分类号： G11B5/00821 ,  G11B5/1872

摘要： The present invention provides a magnetic head that can sustain favorable head contact even when magnetic tapes having different thicknesses are used. A magnetic head has a sliding surface coming in contact with a moving magnetic tape. An electromagnetic transducing element is disposed in the sliding surface. First edges are formed at each end of the sliding surface in the direction of movement of the magnetic tape. Second edges are formed in positions extended in the direction of movement of the magnetic tape from each end of the sliding surface and come in contact with the magnetic tape.

摘要翻译： 本发明提供了一种磁头，即使当使用具有不同厚度的磁带时，磁头仍能保持良好的磁头接触。 磁头具有与移动的磁带接触的滑动表面。 电磁换能元件设置在滑动面上。 第一边沿磁带的移动方向形成在滑动表面的每一端。 第二边缘形成在磁带从滑动表面的每个端部移动的方向上延伸并与磁带接触的位置。

公开(公告)号：US08035929B2

公开(公告)日：2011-10-11

申请号：US12191925

申请日：2008-08-14

申请人： Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

发明人： Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

IPC分类号： G11B5/265

CPC分类号： G11B5/40 ,  G11B5/29 ,  G11B5/3106 ,  G11B5/3967

摘要： A magnetic head assembly of the present invention includes a head rail having a plurality of head element portions each including a MR element and sliding portions that come into contact with a magnetic tape, and a protective film on a magnetic tape sliding surface of the head element portions and the sliding portions, wherein the protective film is formed in a portion other than the vicinity of both ends of the head rail in a traveling direction, and an outermost surface of the protective film, on which a magnetic tape is capable of sliding, is formed flat. Thus, a magnetic head assembly used in a magnetic tape apparatus can be provided, in which an output does not decrease due to the abrasion deformation of the head element portions and the increase in spacing by the adhesion of stain.

摘要翻译： 本发明的磁头组件包括具有多个磁头元件部分的磁头导轨，磁头元件部分各自包括MR元件和与磁带接触的滑动部分，以及在磁头元件的磁带滑动表面上的保护膜 部分和滑动部分，其中保护膜沿行进方向形成在头轨两端附近的部分中，以及保护膜的能够滑动的最外表面， 形成平坦。 因此，可以提供在磁带装置中使用的磁头组件，其中由于头元件部分的磨损变形而导致的输出不会减小，并且由于污渍的附着而增加间隔。

公开(公告)号：US20090052093A1

公开(公告)日：2009-02-26

申请号：US12191925

申请日：2008-08-14

申请人： Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

发明人： Toshio Kawakita ,  Shinji Kawakami ,  Sadamu Kuse

IPC分类号： G11B5/33

CPC分类号： G11B5/40 ,  G11B5/29 ,  G11B5/3106 ,  G11B5/3967

摘要： A magnetic head assembly of the present invention includes a head rail having a plurality of head element portions each including a MR element and sliding portions that come into contact with a magnetic tape, and a protective film on a magnetic tape sliding surface of the head element portions and the sliding portions, wherein the protective film is formed in a portion other than the vicinity of both ends of the head rail in a traveling direction, and an outermost surface of the protective film, on which a magnetic tape is capable of sliding, is formed flat. Thus, a magnetic head assembly used in a magnetic tape apparatus can be provided, in which an output does not decrease due to the abrasion deformation of the head element portions and the increase in spacing by the adhesion of stain.

摘要翻译： 本发明的磁头组件包括具有多个磁头元件部分的磁头导轨，磁头元件部分各自包括MR元件和与磁带接触的滑动部分，以及在磁头元件的磁带滑动表面上的保护膜 部分和滑动部分，其中保护膜沿行进方向形成在头轨两端附近的部分中，以及保护膜的能够滑动的最外表面， 形成平坦。 因此，可以提供在磁带装置中使用的磁头组件，其中由于头元件部分的磨损变形而导致的输出不会减小，并且由于污渍的附着而增加间隔。

公开(公告)号：US20100002338A1

公开(公告)日：2010-01-07

申请号：US12558851

申请日：2009-09-14

申请人： Shinji KAWAKAMI ,  Toshio Kawakita

发明人： Shinji KAWAKAMI ,  Toshio Kawakita

IPC分类号： G11B23/02

CPC分类号： G11B5/584

摘要： A servo controlling method of the present invention is a servo controlling method for controlling a position of a magnetic head against a magnetic tape that is accommodated in a cartridge and has at least a data track and a servo track, and the method includes the steps of: reading tape variance information from a magnetic tape cartridge (23) side, the magnetic tape cartridge (23) being composed of a cartridge (20) and a magnetic tape (21); reading a servo signal recorded in the servo track by the magnetic head and converting the servo signal into head position information; and controlling the position of the magnetic head according to an off-track value based on the tape variance information and an off-track value calculated from the head position information. With this configuration, even in the case where a recording track width is narrowed and a tape speed is increased, the magnetic head can follow a recording track accurately at a high speed.

摘要翻译： 本发明的伺服控制方法是一种伺服控制方法，用于控制磁头相对于容纳在盒中的磁带的位置，并且至少具有数据磁道和伺服磁道，并且该方法包括以下步骤： ：从磁带盒（23）侧读取磁带方差信息，磁带盒（23）由盒（20）和磁带（21）构成; 通过磁头读取记录在伺服轨道中的伺服信号，并将伺服信号转换为磁头位置信息; 以及根据磁带方差信息和从磁头位置信息计算的偏离磁道值，根据偏离磁道值来控制磁头的位置。 利用这种配置，即使在记录磁道宽度变窄并且磁带速度增加的情况下，磁头可以高速跟踪记录磁道。

公开(公告)号：US08264789B2

公开(公告)日：2012-09-11

申请号：US12558851

申请日：2009-09-14

申请人： Shinji Kawakami ,  Toshio Kawakita

发明人： Shinji Kawakami ,  Toshio Kawakita

IPC分类号： G11B5/584 ,  G11B23/02 ,  G11B21/02

CPC分类号： G11B5/584

摘要： A servo controlling method of the present invention is a servo controlling method for controlling a position of a magnetic head against a magnetic tape that is accommodated in a cartridge and has at least a data track and a servo track, and the method includes the steps of: reading tape variance information from a magnetic tape cartridge (23) side, the magnetic tape cartridge (23) being composed of a cartridge (20) and a magnetic tape (21); reading a servo signal recorded in the servo track by the magnetic head and converting the servo signal into head position information; and controlling the position of the magnetic head according to an off-track value based on the tape variance information and an off-track value calculated from the head position information. With this configuration, even in the case where a recording track width is narrowed and a tape speed is increased, the magnetic head can follow a recording track accurately at a high speed.

摘要翻译： 本发明的伺服控制方法是一种伺服控制方法，用于控制磁头相对于容纳在盒中的磁带的位置，并且至少具有数据磁道和伺服磁道，并且该方法包括以下步骤： ：从磁带盒（23）侧读取磁带方差信息，磁带盒（23）由盒（20）和磁带（21）构成; 通过磁头读取记录在伺服轨道中的伺服信号，并将伺服信号转换为磁头位置信息; 以及根据磁带方差信息和从磁头位置信息计算的偏离磁道值，根据偏离磁道值来控制磁头的位置。 利用这种配置，即使在记录磁道宽度变窄并且磁带速度增加的情况下，磁头可以高速跟踪记录磁道。

公开(公告)号：US20080278844A1

公开(公告)日：2008-11-13

申请号：US12026391

申请日：2008-02-05

申请人： Shinji KAWAKAMI ,  Toshio Kawakita

发明人： Shinji KAWAKAMI ,  Toshio Kawakita

IPC分类号： G11B5/584

CPC分类号： G11B5/584

摘要： A servo controlling method of the present invention is a servo controlling method for controlling a position of a magnetic head against a magnetic tape that is accommodated in a cartridge and has at least a data track and a servo track, and the method includes the steps of: reading tape variance information from a magnetic tape cartridge 23 side, the magnetic tape cartridge 23 being composed of a cartridge 20 and a magnetic tape 21; reading a servo signal recorded in the servo track by the magnetic head and converting the servo signal into head position information; and controlling the position of the magnetic head according to an off-track value based on the tape variance information and an off-track value calculated from the head position information. With this configuration, even in the case where a recording track width is narrowed and a tape speed is increased, the magnetic head can follow a recording track accurately at a high speed

摘要翻译： 本发明的伺服控制方法是一种伺服控制方法，用于控制磁头相对于容纳在盒中的磁带的位置，并且至少具有数据磁道和伺服磁道，并且该方法包括以下步骤： ：从磁带盒23侧读取磁带方差信息，磁带盒23由盒20和磁带21构成; 通过磁头读取记录在伺服轨道中的伺服信号，并将伺服信号转换为磁头位置信息; 以及根据磁带方差信息和从磁头位置信息计算的偏离磁道值，根据偏离磁道值来控制磁头的位置。 利用这种配置，即使在记录磁道宽度变窄并且磁带速度增加的情况下，磁头可以高速跟踪记录磁道