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    • 62. 发明申请
    • Storage apparatus, control method, control device, and program
    • 存储装置,控制方法,控制装置和程序
    • US20080043363A1
    • 2008-02-21
    • US11645189
    • 2006-12-22
    • Satoshi YamashitaSyunji SaitouYukio AbeShigenori Yanagi
    • Satoshi YamashitaSyunji SaitouYukio AbeShigenori Yanagi
    • G11B21/02G11B27/36
    • G11B5/607
    • An amplitude measurement unit measures an amplitude of a read signal from a preamble unit in a servo area of a predetermined frame number m per one rotation of the recording medium for a predetermined cycle number n while increasing an electric power amount distributed to the heater in the state in which the head is positioned to a track on the recording medium, and a mean amplitude calculating unit calculates a mean amplitude from an amplitude measurement value which is measured by the number which is the frame number m multiplied by the cycle number n. A contact determination unit calculates a mean amplitude variation amount per a unit heater electric power amount as a contact determination value, and determines that the head is in contact with the recording medium when the contact determination value is lower than a predetermined threshold value, and a flying height calculating unit which calculates a flying height of the head with respect to the surface of the recording medium from the heater electric power amount at the point when contact is determined.
    • 幅度测量单元在预定周期数n的每一记录介质旋转的预定帧数m的伺服区域中的前导码单元中测量读取信号的幅度,同时增加分配给加热器的电力量 头部位于记录介质上的轨迹的状态,平均幅度计算单元根据作为帧数m乘以周期数n的数量测量的振幅测量值来计算平均振幅。 接触确定单元计算每单位加热器电力量的平均幅度变化量作为接触确定值,并且当接触确定值低于预定阈值时,确定头与记录介质接触,并且 飞行高度计算单元,其根据确定接触点处的加热器电力量,计算头部相对于记录介质表面的飞行高度。
    • 66. 发明申请
    • Storage device, control method, control device, and program
    • 存储设备,控制方法,控制设备和程序
    • US20070230015A1
    • 2007-10-04
    • US11524075
    • 2006-09-20
    • Satoshi YamashitaShunji SaitouYukio AbeShigenori Yanagi
    • Satoshi YamashitaShunji SaitouYukio AbeShigenori Yanagi
    • G11B21/02
    • G11B5/455G11B5/58G11B5/6005G11B5/6064
    • A heater for changing a projection distance protrusion value by thermal expansion accompanying electric-power-distributed heating is provided in a head having at least a reading element. At desired correction timing, a changed distance detection unit measures a clearance changed distance in a state in which the head is positioned to a track on the recording medium while increasing the amount of electric power distributed to the heater. A contact determination unit determines that the head is brought into contact with the recording medium when a derivative value of the clearance changed distance is below a predetermined threshold value. A measurement output unit outputs the clearance changed distance detected by the changed distance detection unit at the time of contact determination of the contact determination unit as a measurement result of the clearance between the reading element and the recording medium.
    • 在具有至少读取元件的头部中设置有用于通过伴随电力分配加热的热膨胀来改变投影距离突出值的加热器。 在期望的校正时刻,改变的距离检测单元在增加分配给加热器的电力量的同时,在头部位于记录介质上的轨道的状态下测量间隙改变距离。 当间隙改变距离的微分值低于预定阈值时,接触确定单元确定头与记录介质接触。 测量输出单元作为读取元件和记录介质之间的间隙的测量结果输出由接触确定单元的接触确定时由改变距离检测单元检测到的间隙改变距离。
    • 68. 发明申请
    • Medium storage device and medium rotation synchronization processing method for medium storage device
    • 中型存储设备和介质存储设备的中等旋转同步处理方法
    • US20060203371A1
    • 2006-09-14
    • US11231272
    • 2005-09-20
    • Takao AbeShigenori Yanagi
    • Takao AbeShigenori Yanagi
    • G11B5/09G11B5/596
    • G11B5/09G11B5/59627
    • A medium storage device writes or read data on a storage medium synchronizing the rotation of the storage medium with the DSW method for decreasing the gap length considering the rotation jitter. The medium storage device has a controller for generating synchronization timing signals during reading/writing from a clock, and a processing unit for calculating the correction value of the frequency from the measurement result of the servo synchronization mark space of the storage medium. The processing unit judges whether or not the detected interval of the servo synchronization marks is within a predetermined range which is not occurred a frequency compensation to influent an error rate when reading, and corrects the synchronization timing of the controller based on the interval of the servo synchronization marks when the detected interval is judged within the predetermined range.
    • 介质存储设备将存储介质上的数据写入或读取存储介质的旋转,同时使用DSW方法,以考虑旋转抖动来减小间隙长度。 介质存储装置具有用于在从时钟读取/写入期间产生同步定时信号的控制器,以及用于根据存储介质的伺服同步标记空间的测量结果计算频率校正值的处理单元。 所述处理单元判断所检测到的伺服同步标记的间隔是否在不发生频率补偿的预定范围内,以便在读取时影响错误率,并且基于伺服的间隔来校正控制器的同步定时 当在预定范围内判断检测到的间隔时,同步标记。
    • 69. 发明授权
    • Shock detection device, disk drive, shock detection method, and shock detection program
    • 冲击检测装置,磁盘驱动器,冲击检测方法和冲击检测程序
    • US06999260B2
    • 2006-02-14
    • US10801403
    • 2004-03-16
    • Yukio AbeShigenori Yanagi
    • Yukio AbeShigenori Yanagi
    • G11B15/04
    • G11B27/36G11B5/5582G11B19/04G11B21/083
    • A shock detection device can detect a slight shock without mis-detection of shocks due to noise in a shock sensor signal. The shock detection device is adapted to output a shock detection signal for stopping writing into a disk medium when a shock applied to the disk medium satisfies a prescribed condition. The shock detection device includes a shock sensor that detects a shock applied to the disk medium and outputs a corresponding shock sensor signal, a variable shock detection slice value setting part that sets a threshold for the shock sensor signal based on a position error signal, a shock sensor signal correction part that outputs, as a new shock sensor signal, a signal by removing noise generated in synchronization with writing from the shock sensor signal, and a shock determining part that outputs a shock detection signal when the shock sensor signal exceeds the variable shock detection slice value.
    • 冲击检测装置可以检测到轻微的冲击,而不会由于冲击传感器信号中的噪声而误检。 冲击检测装置适用于当施加到盘介质的冲击满足规定条件时输出用于停止写入盘介质的冲击检测信号。 冲击检测装置包括:震动传感器,其检测施加到盘介质的冲击并输出相应的震动传感器信号;可变冲击检测切片值设定部,其基于位置误差信号设定冲击传感器信号的阈值; 冲击传感器信号校正部分,通过去除与冲击传感器信号的写入同步产生的噪声作为新的冲击传感器信号输出信号;以及冲击确定部,其在冲击传感器信号超过变量时输出冲击检测信号 休克检测切片值。