公开(公告)号：US06476997B2

公开(公告)日：2002-11-05

申请号：US09120906

申请日：1998-07-22

申请人： Yukio Fukushima ,  Tetsuo Ueda ,  Toshio Kakihara ,  Hideo Asano

发明人： Yukio Fukushima ,  Tetsuo Ueda ,  Toshio Kakihara ,  Hideo Asano

IPC分类号： G11B5596

CPC分类号： G11B5/59627

摘要： A disk device, track positioning method, and method for generating a position error signal in which the occurrence of a wrong correction operation can be prevented by creating an appropriate PES without using a burst pattern having a defect, and reassign sectors can be decreased by decreasing defective sectors thereby to reduce the performance degradation is disclosed. In the disk device and track positioning method, the defect of a burst pattern read out from a disk is detected, and if a defect is detected in the burst pattern, a data value corresponding to the sum data of the burst pattern pair having the defect detected is obtained by measuring the maximum amplitude value of the burst pattern pairing with the burst pattern having the defect detected, and a PES is created according to the amplitude of the burst pattern having the defect detected and the maximum amplitude value.

摘要翻译： 一种磁盘装置，轨道定位方法以及用于产生位置误差信号的方法，其中可以通过在不使用具有缺陷的脉冲串模式的情况下创建适当的PES来防止出现错误的校正操作，并且可以通过减少重新分配扇区来减少重新分配扇区 缺陷扇区，从而降低性能下降。 在盘装置和轨迹定位方法中，检测从盘读出的脉冲串模式的缺陷，并且如果在脉冲串模式中检测到缺陷，则与具有缺陷的脉冲串模式对的和数据相对应的数据值 通过测量与检测到缺陷的脉冲串模式匹配的脉冲串模式的最大幅度值，并且根据具有检测到的缺陷的脉冲串模式的幅度和最大振幅值来创建PES来获得检测到的。

公开(公告)号：US5959734A

公开(公告)日：1999-09-28

申请号：US70792

申请日：1998-05-01

申请人： Shoichi Tanaka ,  Yukio Fukushima ,  Masahira Akasu

发明人： Shoichi Tanaka ,  Yukio Fukushima ,  Masahira Akasu

IPC分类号： G01B7/30 ,  G01B7/00 ,  G01B11/00 ,  G01C3/06 ,  G01S7/48 ,  G01S7/481 ,  G01S17/08 ,  G01S17/42 ,  G02B7/32 ,  G02B26/10 ,  G01B11/14 ,  G01B11/24

CPC分类号： G01S7/4817 ,  G01S7/4811 ,  G01S17/08

摘要： A distance measuring device having an improved control performance in a compact body by simplifying a structure for scanning a laser beam and a method of controlling the scanning. The device has a mirror for scanning an emitted laser beam, an axis around which the mirror is swung, a permanent magnet which swings along with the mirror, a core disposed opposite to the permanent magnet, a coil provided in the periphery of the core, a Hall element for detecting a swing angle of the mirror, and a circuit for controlling swing motion with a signal derived from a swing waveform formed in a predetermined shape in order to control a current in the coil, and a control signal formed by a controlled variable calculated from a deviation between a predetermined position of the mirror and a detected position.

摘要翻译： 通过简化扫描激光束的结构，具有改进的紧凑体的控制性能的测距装置以及控制扫描的方法。 该装置具有用于扫描发射的激光束，反射镜摆动的轴的反射镜，与反射镜一起摆动的永磁体，与永磁体相对设置的芯，设置在芯的周边的线圈， 用于检测反射镜的摆动角度的霍尔元件和用于控制由形成为预定形状的摆动波形得到的信号来控制摆动的电路，以便控制线圈中的电流，以及控制信号 根据反射镜的预定位置和检测位置之间的偏差计算出的变量。

公开(公告)号：US5943179A

公开(公告)日：1999-08-24

申请号：US747296

申请日：1996-11-12

申请人： Yukio Fukushima

发明人： Yukio Fukushima

IPC分类号： G11B21/08 ,  G11B5/55 ,  G11B21/10 ,  G11B5/596

CPC分类号： G11B5/5534

摘要： Tilt values between heads in a disk drive apparatus are previously measured. The measured values are stored in a head switch compensation table. In a head switch operation, a track nearest to the present position of a head to be used after a head switch operation is selected as a target track for the head to be used. A head switch compensation table is stored in a disk. The head switch compensation table stores tilt values represented by a number of tracks which corresponds to a relative deviation between heads. For example, if the table contains data showing that a tilt value between head 1 and head 2 is +1 track, then when heads are switched from head 1 to head 2, a target track for head 2 is selected by adding this value +1 to the current track address on which head 1 is positioned. By this method, head 2 can be positioned on the nearest track by a short time seek operation and can continue a sequential read or write operation.

摘要翻译： 先前测量磁盘驱动装置中的磁头之间的倾斜值。 测量值存储在磁头开关补偿表中。 在头切换操作中，选择在头切换操作之后最靠近头部的当前位置的轨迹作为要使用的头的目标轨迹。 磁头开关补偿表存储在磁盘中。 头开关补偿表存储由与磁头之间的相对偏差相对应的轨道数表示的倾斜值。 例如，如果该表包含表示头部1和头部2之间的倾斜值为+1轨道的数据，则当头部从头部1切换到头部2时，通过将该值+1加1来选择头部2的目标轨迹 到头1所在的当前轨道地址。 通过这种方法，头2可以通过短时间寻找操作定位在最近的轨道上，并且可以继续顺序读取或写入操作。