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公开(公告)号：US07894149B2
公开(公告)日：2011-02-22
申请号：US12322026
申请日：2009-01-27
CPC分类号： G11B19/046 , G11B5/40 , G11B5/581 , G11B5/6029 , G11B5/6064 , G11B33/1406
摘要： Embodiments of the present invention precisely measure clearance variation by temperature change using a value in a RW channel. In an embodiment of the present invention, an HDD measures resolution by signals in a RW channel. The measured resolution shows variations depending on temperature according to two factors. One factor is the clearance variation depending on the temperature and the other is the variation in operational property of the RW channel depending on the temperature. The HDD compensates for the temperature variation of the resolution according to the two factors. The HDD uses two kinds of sensed temperature. One corresponds to the temperature inside an enclosure in which head sliders are provided and the other corresponds to the temperature of the chip in which the RW channel is implemented. Sensing the drive temperature and the channel temperature independently achieves precise compensation for the variation in the measured resolution caused by clearance variation and channel property.
摘要翻译： 本发明的实施例使用RW通道中的值精确地测量通过温度变化的间隙变化。 在本发明的实施例中，HDD通过RW信道中的信号来测量分辨率。 测量的分辨率根据两个因素显示出根据温度的变化。 一个因素是取决于温度的间隙变化，另一个因素是RW通道的操作性能随温度的变化。 HDD根据两个因素补偿分辨率的温度变化。 HDD使用两种感测温度。 一个对应于其中提供磁头滑块的外壳内的温度，另一个对应于实现RW通道的芯片的温度。 感测驱动温度和通道温度独立地对由间隙变化和通道特性引起的测量分辨率的变化进行精确补偿。
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2.发明申请公开(公告)号：US20110102933A1
公开(公告)日：2011-05-05
申请号：US12558435
申请日：2009-09-11
CPC分类号： G11B5/6029 , G11B5/6064
摘要： A method for measuring a change of a clearance between a head and a disk. The method includes reading a preliminarily written data string for clearance measurement on a disk to obtain a first measured value corresponding to a clearance, and writing a new data string for deterioration check onto the disk and reading the data string for deterioration check to obtain a second measured value corresponding to the clearance. The method also includes determining a deterioration of the data string for clearance measurement from a difference between the first measured value and the second measured value, measuring a clearance change using the data string for clearance measurement by a normal operation if the determination is that the data string for clearance measurement has not deteriorated, and measuring a clearance change by an operation different operation if the determination is that the data string for clearance measurement has deteriorated.
摘要翻译： 一种用于测量磁头和磁盘之间的间隙变化的方法。 该方法包括在盘上读取用于间隙测量的预先写入的数据串，以获得与间隙相对应的第一测量值，并将用于劣化检查的新数据串写入盘并读取用于劣化检查的数据串，以获得第二 测量值对应于间隙。 该方法还包括从第一测量值和第二测量值之间的差异确定用于间隙测量的数据串的劣化，如果确定数据是通过正常操作，则使用用于间隙测量的数据串来测量间隙变化 用于间隙测量的琴弦没有劣化，并且如果确定用于间隙测量的数据串已经劣化，则通过操作不同的操作来测量间隙变化。
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3.发明授权公开(公告)号：US08300337B2
公开(公告)日：2012-10-30
申请号：US12558435
申请日：2009-09-11
CPC分类号： G11B5/6029 , G11B5/6064
摘要： A method for measuring change of clearance between a head and a disk. The method includes reading a preliminarily written data string for clearance measurement on a disk to obtain a first measured value corresponding to a clearance, and writing a new data string for deterioration check onto the disk and reading the data string for deterioration check to obtain a second measured value corresponding to the clearance. The method also includes determining a deterioration of the data string for clearance measurement from a difference between the first measured value and the second measured value, measuring a clearance change using the data string for clearance measurement by a normal operation if the determination is that the data string for clearance measurement has not deteriorated, and measuring a clearance change by an operation different from the normal operation if the determination is that the data string for clearance measurement has deteriorated.
摘要翻译： 一种用于测量磁头和磁盘之间的间隙变化的方法。 该方法包括在盘上读取用于间隙测量的预先写入的数据串，以获得与间隙相对应的第一测量值，并将用于劣化检查的新数据串写入盘并读取用于劣化检查的数据串，以获得第二 测量值对应于间隙。 该方法还包括从第一测量值和第二测量值之间的差异确定用于间隙测量的数据串的劣化，如果确定数据是通过正常操作，则使用用于间隙测量的数据串来测量间隙变化 用于间隙测量的琴弦没有劣化，并且如果确定用于间隙测量的数据串已经劣化，则通过与正常操作不同的操作来测量间隙变化。
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公开(公告)号：US20090201598A1
公开(公告)日：2009-08-13
申请号：US12322026
申请日：2009-01-27
CPC分类号： G11B19/046 , G11B5/40 , G11B5/581 , G11B5/6029 , G11B5/6064 , G11B33/1406
摘要： Embodiments of the present invention precisely measure clearance variation by temperature change using a value in a RW channel. In an embodiment of the present invention, an HDD measures resolution by signals in a RW channel. The measured resolution shows variations depending on temperature according to two factors. One factor is the clearance variation depending on the temperature and the other is the variation in operational property of the RW channel depending on the temperature. The HDD compensates for the temperature variation of the resolution according to the two factors. The HDD uses two kinds of sensed temperature. One corresponds to the temperature inside an enclosure in which head sliders are provided and the other corresponds to the temperature of the chip in which the RW channel is implemented. Sensing the drive temperature and the channel temperature independently achieves precise compensation for the variation in the measured resolution caused by clearance variation and channel property.
摘要翻译： 本发明的实施例使用RW通道中的值精确地测量通过温度变化的间隙变化。 在本发明的实施例中，HDD通过RW信道中的信号来测量分辨率。 测量的分辨率根据两个因素显示出根据温度的变化。 一个因素是取决于温度的间隙变化，另一个因素是RW通道的操作性能随温度的变化。 HDD根据两个因素补偿分辨率的温度变化。 HDD使用两种感测温度。 一个对应于其中提供磁头滑块的外壳内的温度，另一个对应于实现RW通道的芯片的温度。 感测驱动温度和通道温度独立地对由间隙变化和通道特性引起的测量分辨率的变化进行精确补偿。
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公开(公告)号：US20090141391A1
公开(公告)日：2009-06-04
申请号：US12290533
申请日：2008-10-30
申请人： Kenichi Kuramoto , Masayuki Kurita , Yoshihiko Maeda , Hidetsugu Tanaka , Akihiro Sera , Katsumasa Yamazaki
发明人： Kenichi Kuramoto , Masayuki Kurita , Yoshihiko Maeda , Hidetsugu Tanaka , Akihiro Sera , Katsumasa Yamazaki
IPC分类号： G11B21/02
摘要： Embodiments of the present invention help to precisely control the clearance between a head and disk for the pressure without using a barometric sensor. In an embodiment of the present invention, an HDD determines a clearance from variations in operational parameters, and further determines a variation in pressure by deducting the clearance variation caused by a variation in temperature from the clearance. When the HDD controls the clearance in accordance with the pressure change, the HDD checks for head-disk contact. The accuracy and reliability in pressure measurement (clearance measurement) using operational parameters are not high. Therefore, confirming the pressure measurement by the presence or absence of head-disk contact eliminates head-disk contact in the following read/write operation to attain a securer margin for the clearance.
摘要翻译： 本发明的实施例有助于在不使用气压传感器的情况下精确地控制压头与盘之间的压力间隙。 在本发明的一个实施例中，HDD确定与操作参数变化之间的间隙，并且通过减去由间隙的温度变化引起的间隙变化来进一步确定压力变化。 当HDD根据压力变化控制间隙时，HDD检查头盘接触。 使用操作参数的压力测量（间隙测量）的精度和可靠性不高。 因此，通过头盘接触的存在或不存在来确认压力测量可以在随后的读/写操作中消除头盘接触，以获得间隙的安全裕度。
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公开(公告)号：US07428119B2
公开(公告)日：2008-09-23
申请号：US11583211
申请日：2006-10-18
申请人： Kenji Kuroki , Toru Aida , Kenichi Kuramoto , Yasuhiro Kotani
发明人： Kenji Kuroki , Toru Aida , Kenichi Kuramoto , Yasuhiro Kotani
IPC分类号： G11B21/02
CPC分类号： G11B5/54 , G11B5/5526 , G11B19/043 , G11B21/12
摘要： Embodiments of the invention improve utility of a magnetic disk drive in which a head is retracted if the magnetic disk drive is in a dropping state. In one embodiment, an HDC/MPU provided in a magnetic disk drive judges whether the magnetic disk drive is in a dropping state based on an output from an acceleration sensor which may detect an acceleration and performs a retraction operation of a head. After the HDC/MPU judges that a drop is occurring, the HDC/MPU detects whether the drop judgment is incorrect according to whether a shock sensor detects a shock occurrence and changes the drop judgment condition based on a detection history of detected incorrect judgments.
摘要翻译： 本发明的实施例提高了如果磁盘驱动器处于下降状态时磁头被缩回的磁盘驱动器的实用性。 在一个实施例中，设置在磁盘驱动器中的HDC / MPU基于可以检测加速度并执行头部的缩回操作的加速度传感器的输出来判断磁盘驱动器是否处于丢弃状态。 在HDC / MPU判定发生下降之后，根据检测到的错误判断的检测历史，HDC / MPU根据冲击传感器是否检测到冲击发生并改变下降判断条件来检测丢失判定是否不正确。
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公开(公告)号：US08009380B2
公开(公告)日：2011-08-30
申请号：US12623345
申请日：2009-11-20
IPC分类号： G11B21/02
CPC分类号： G11B5/6029 , G11B5/6005 , G11B5/6035 , G11B5/6058 , G11B5/6064 , G11B5/607
摘要： A disk drive. The disk drive includes a disk configured to store data, a slider configured to fly in proximity to the disk, and a magnetic-recording head on the slider configured to access the disk. The disk drive also includes a moving mechanism configured to support and to move the head-slider, an adjustment portion configured to adjust clearance between the magnetic-recording head and the disk, and a controller configured to control the adjustment portion to control the clearance. The controller is configured to perform clearance control in a first mode in an operation selected from the group consisting of reading user data and writing user data according to a change in fly height of the slider after a load operation, and subsequently is configured to perform clearance control in a second mode in an operation selected from the group consisting of reading user data and writing user data.
摘要翻译： 磁盘驱动器 磁盘驱动器包括被配置为存储数据的盘，被配置为在盘附近飞行的滑块以及被配置为访问盘的滑块上的磁记录头。 磁盘驱动器还包括移动机构，其被配置为支撑和移动磁头滑动器，配置成调节磁记录磁头和磁盘之间的间隙的调整部分以及被配置为控制调整部分来控制间隙的控制器。 控制器被配置为在从包括读取用户数据和在加载操作之后根据滑块的飞行高度的改变来写入用户数据的组中选择的操作中执行第一模式中的间隙控制，并且随后被配置为执行间隙 在从包括读取用户数据和写入用户数据的组中选择的操作中以第二模式进行控制。
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公开(公告)号：US07706097B2
公开(公告)日：2010-04-27
申请号：US12284231
申请日：2008-09-19
申请人： Kenji Kuroki , Toru Aida , Kenichi Kuramoto , Yasuhiro Kotani
发明人： Kenji Kuroki , Toru Aida , Kenichi Kuramoto , Yasuhiro Kotani
IPC分类号： G11B21/02
CPC分类号： G11B5/54 , G11B5/5526 , G11B19/043 , G11B21/12
摘要： Embodiments of the invention improve utility of a magnetic disk drive in which a head is retracted if the magnetic disk drive is in a dropping state. In one embodiment, an HDC/MPU provided in a magnetic disk drive judges whether the magnetic disk drive is in a dropping state based on an output from an acceleration sensor which may detect an acceleration and performs a retraction operation of a head. After the HDC/MPU judges that a drop is occurring, the HDC/MPU detects whether the drop judgment is incorrect according to whether a shock sensor detects a shock occurrence and changes the drop judgment condition based on a detection history of detected incorrect judgments.
摘要翻译： 本发明的实施例提高了如果磁盘驱动器处于下降状态时磁头被缩回的磁盘驱动器的实用性。 在一个实施例中，设置在磁盘驱动器中的HDC / MPU基于可以检测加速度并执行头部的缩回操作的加速度传感器的输出来判断磁盘驱动器是否处于丢弃状态。 在HDC / MPU判定发生下降之后，根据检测到的错误判断的检测历史，HDC / MPU根据冲击传感器是否检测到冲击发生并改变下降判断条件来检测丢失判定是否不正确。
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9.发明申请Device and method for specifying control value for controlling clearance between head and disk, and magnetic disk drive device 有权用于指定用于控制磁头和磁盘之间的间隙的控制值的装置和方法以及磁盘驱动装置公开(公告)号：US20090296260A1
公开(公告)日：2009-12-03
申请号：US12156092
申请日：2008-05-28
IPC分类号： G11B21/02
CPC分类号： G11B5/6064 , G11B5/607
摘要： Embodiments of the present invention help to detect contact between a head and a magnetic disk more accurately in specifying a heater power value for adjusting a clearance between a head element portion and the disk. According to one embodiment, a hard disk controller/multiprocessing unit (HDC/MPU) measures amplitudes of read signals in a user data field DATA. A hard disk drive (HDD) fills a gap between servo data with single data sector. The HDC/MPU measures the amplitudes of read signals in each data sector at different heater power values. It determines the heater power value at which contact occurs from the measured values.
摘要翻译： 本发明的实施例有助于在确定用于调节头元件部分和盘之间的间隙的加热器功率值时更准确地检测磁头和磁盘之间的接触。 根据一个实施例，硬盘控制器/多处理单元（HDC / MPU）测量用户数据字段DATA中的读取信号的幅度。 硬盘驱动器（HDD）填充伺服数据与单个数据扇区之间的间隙。 HDC / MPU以不同的加热器功率值测量每个数据扇区中读取信号的幅度。 它从测量值确定接触发生的加热器功率值。
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10.发明授权Device and method for specifying control value for controlling clearance between head and disk, and magnetic disk drive device 有权用于指定用于控制磁头和磁盘之间的间隙的控制值的装置和方法以及磁盘驱动装置公开(公告)号：US07852594B2
公开(公告)日：2010-12-14
申请号：US12156092
申请日：2008-05-28
IPC分类号： G11B21/02
CPC分类号： G11B5/6064 , G11B5/607
摘要： Embodiments of the present invention help to detect contact between a head and a magnetic disk more accurately in specifying a heater power value for adjusting a clearance between a head element portion and the disk. According to one embodiment, a hard disk controller/multiprocessing unit (HDC/MPU) measures amplitudes of read signals in a user data field DATA. A hard disk drive (HDD) fills a gap between servo data with single data sector. The HDC/MPU measures the amplitudes of read signals in each data sector at different heater power values. It determines the heater power value at which contact occurs from the measured values.
摘要翻译： 本发明的实施例有助于在确定用于调节头元件部分和盘之间的间隙的加热器功率值时更准确地检测磁头和磁盘之间的接触。 根据一个实施例，硬盘控制器/多处理单元（HDC / MPU）测量用户数据字段DATA中的读取信号的幅度。 硬盘驱动器（HDD）填充伺服数据与单个数据扇区之间的间隙。 HDC / MPU以不同的加热器功率值测量每个数据扇区中读取信号的幅度。 它从测量值确定接触发生的加热器功率值。
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