SYSTEMS AND METHODS FOR FLY-HEIGHT CONTROL USING SERVO DATA
    1.
    发明申请
    SYSTEMS AND METHODS FOR FLY-HEIGHT CONTROL USING SERVO DATA 审中-公开
    使用伺服数据进行飞行高度控制的系统和方法

    公开(公告)号:WO2009079093A1

    公开(公告)日:2009-06-25

    申请号:PCT/US2008/081379

    申请日:2008-10-27

    CPC classification number: G11B5/6029 G11B5/59688

    Abstract: Various embodiments of the present invention provide systems and methods for determining changes in fly-height. For example, various embodiments of the present invention provide storage devices that include a storage medium having servo data thereon. A read/write head assembly is disposed in relation to the storage medium. A servo based fly-height adjustment circuit receives the servo data via the read/write head assembly, and calculates a first harmonics ratio based on the received data and compares the first harmonics ratio with a second harmonics ratio to determine an error in the distance between the read/write head assembly and the storage medium.

    Abstract translation: 本发明的各种实施例提供用于确定飞行高度变化的系统和方法。 例如,本发明的各种实施例提供了包括其上具有伺服数据的存储介质的存储设备。 相对于存储介质设置读/写头组件。 基于伺服的飞高调节电路经由读/写头组件接收伺服数据,并且基于接收到的数据计算第一谐波比,并将第一谐波比与第二谐波比进行比较,以确定第二谐波比之间的距离误差 读/写头组件和存储介质。

    HEAT-ASSISTED MAGNETIC RECORDING HEAD-DISK CLEARANCE SETTING
    2.
    发明申请
    HEAT-ASSISTED MAGNETIC RECORDING HEAD-DISK CLEARANCE SETTING 审中-公开
    热辅助记录头盘清洁设置

    公开(公告)号:WO2016130611A1

    公开(公告)日:2016-08-18

    申请号:PCT/US2016/017241

    申请日:2016-02-10

    Abstract: A magnetic recording head comprises a transducer, a heater, a writer and a laser. The transducer is configured to write to a magnetic recording medium during a write operation. The heater, writer and laser are configured to affect a protrusion of the transducer. The heater is calibrated to produce a pre -write heater power to obtain a target pre -write clearance for a write operation through use of a clearance-heater power curve. The curve is generated by measuring a clearance between the transducer and the medium as the heater is cycled from zero to a contact power.

    Abstract translation: 磁记录头包括换能器,加热器,写入器和激光器。 传感器配置为在写入操作期间写入磁记录介质。 加热器,写入器和激光器被配置成影响换能器的突起。 加热器被校准以产生预写加热器功率,以通过使用间隙加热器功率曲线来获得用于写入操作的目标预写间隙。 当加热器从零循环到接触功率时,通过测量换能器和介质之间的间隙来产生曲线。

    LOW FLYING HEAD DETECTION USING READBACK SIGNAL AMPLITUDE MODULATION
    3.
    发明申请
    LOW FLYING HEAD DETECTION USING READBACK SIGNAL AMPLITUDE MODULATION 审中-公开
    使用阅读信号振幅调制的低飞行头检测

    公开(公告)号:WO2003083871A1

    公开(公告)日:2003-10-09

    申请号:PCT/US2003/009728

    申请日:2003-03-28

    Abstract: A disk (106) attached to a spindle motor (304) is accelerated to an operating rotational velocity. The head is positioned over a portion of the disc non-accessible to customer data and a data pattern of selected frequency is written. A magnetoresistive element of the head is biased and the data pattern is read while the disc is decelerated to a predetermined rotational velocity threshold. Occurrence of a read signal landing signature (308) comprising relatively low frequency, peak to peak readback signal amplitude modulation prior to reaching the predetermined rotational velocity threshold enables a control circuit (306) to identify the head as a low-flying head.

    Abstract translation: 附接到主轴电机(304)的盘(106)被加速到操作旋转速度。 头部位于盘的不可访问的盘的一部分上,并且写入所选频率的数据模式。 头部的磁阻元件被偏置,并且当盘被减速到预定旋转速度阈值时读取数据图形。 在达到预定旋转速度阈值之前,包括相对低频的峰值回读信号幅度调制的读信号着陆签名(308)的发生使得控制电路(306)能够将头识别为低飞头。

    CONTACT DETECTION
    4.
    发明申请
    CONTACT DETECTION 审中-公开
    接触检测

    公开(公告)号:WO2012118583A1

    公开(公告)日:2012-09-07

    申请号:PCT/US2012/023118

    申请日:2012-01-30

    Abstract: A method of detecting a contact between a transducing head and a storage medium is provided. The method applies an input signal, having a select power level and known frequency, to an actuator for actuating the head. An output signal is obtained in response to the input signal. At least one signal component is extracted from the output signal at the same or a harmonic of the same known frequency as the input signal applied to the actuator. Whether the at least one extracted signal component indicates a contact between the head and the medium is determined. The power level of the applied wave pattern is increased incrementally until the extracted signal component indicates a contact between the head and the storage medium.

    Abstract translation: 提供了一种检测换能头与存储介质之间的接触的方法。 该方法将具有选择功率电平和已知频率的输入信号应用于致动头的致动器。 响应于输入信号获得输出信号。 以与施加到致动器的输入信号相同的已知频率的相同或谐波从输出信号提取至少一个信号分量。 确定至少一个提取的信号分量是否指示头部和介质之间的接触。 所施加的波形图案的功率电平逐渐增加,直到提取的信号分量表示头部和存储介质之间的接触。

    DETECTION OF FLY HEIGHT CHANGE IN A DISK DRIVE
    5.
    发明申请
    DETECTION OF FLY HEIGHT CHANGE IN A DISK DRIVE 审中-公开
    检测磁盘驱动器中的高度变化

    公开(公告)号:WO2006022976A3

    公开(公告)日:2006-12-21

    申请号:PCT/US2005019968

    申请日:2005-06-07

    Inventor: YIPING MA

    CPC classification number: G11B5/6005 G11B5/41 G11B5/455 G11B5/6029

    Abstract: A method for detecting a change in fly-height comprises measuring a baseline position error signal, measuring a position error signal at later time, and comparing the measured change in PES to a predetermined value. If the measured change in PES is greater than the predetermined value, it is determined that a decrease in fly-height has occurred. Depending on whether the disk drive has a head cleaner or whether the PES signal changes occur only at the certain diameter of the disk, a head cleaning is initiated to correct the fly-height change. If no head cleaning is necessary, a general error signal may be generated to indicate potential drive failure.

    Abstract translation: 用于检测飞高变化的方法包括测量基线位置误差信号,在稍后时间测量位置误差信号,并将所测量的PES变化与预定值进行比较。 如果测量的PES的变化大于预定值,则确定飞行高度的降低已经发生。 取决于磁盘驱动器是否具有头部清洁器,或者PES信号是否仅在盘的特定直径处发生变化,则会启动头部清洁以校正飞行高度的变化。 如果不需要清洁头,则可能会产生一般错误信号,以指示潜在的驱动器故障。

    ヘッド試験方法およびヘッド試験装置
    6.
    发明申请
    ヘッド試験方法およびヘッド試験装置 审中-公开
    用于测试头部的方法和用于测试头的装置

    公开(公告)号:WO2009044490A1

    公开(公告)日:2009-04-09

    申请号:PCT/JP2007/069631

    申请日:2007-10-05

    Inventor: 大江 健

    CPC classification number: G11B5/455 G11B5/6029

    Abstract:  ヘッドスライダ(23)を備える完成品のフレキシャユニットがベース(46)の表面に着脱自在に固定される。フレキシャ(35)上でヘッドスライダ(23)の電磁変換素子には予め配線パターンが電気的に接続される。フレキシャユニットではヘッドサスペンションに実際に実装された状態と同じ状態が実現される。ヘッドの特性試験にあたってヘッドスライダ(23)は磁気ディスク(43)の表面に向き合わせられる。電磁変換素子は磁気ディスク(43)から磁気情報を読み出す。読み出された磁気情報は配線パターンから出力される。接触抵抗の発生は回避される。安定的に電磁変換素子の特性試験が実施される。しかも、不良のヘッドスライダ(23)が検出されると、フレキシャユニットが廃棄される。例えばヘッドサスペンションアセンブリ自体が廃棄される場合に比べて、廃棄物はできる限り抑制される。コスト面の損失はできる限り回避される。

    Abstract translation: 具有头滑块(23)的完成的弯曲单元以可自由拆卸的方式固定到基座(46)的顶表面。 在弯曲(35)上,布线图案被电预先连接到磁头滑块(23)的电磁转换元件。 弯曲单元被放置在与其实际安装在头部悬架上的情况相同的状态。 对于头部的特性测试,磁头滑动器(23)面对磁盘(43)的顶表面。 电磁转换元件从磁盘(43)读出磁信息。 读取磁信息从布线图案输出。 避免产生任何接触电阻。 以高稳定性进行电磁转换元件的特性试验。 此外,在检测到错误的磁头滑动器(23)时,将挠曲单元丢弃。 因此,与例如头部悬挂组件本身被丢弃的情况相比,尽可能减少废料的量,从而尽可能避免成本损失。

    スライダ支持機構、バネ圧制御方法およびバネ圧制御装置
    7.
    发明申请
    スライダ支持機構、バネ圧制御方法およびバネ圧制御装置 审中-公开
    滑动支撑机构,弹簧压力控制方法和弹簧压力控制器

    公开(公告)号:WO2009044448A1

    公开(公告)日:2009-04-09

    申请号:PCT/JP2007/069233

    申请日:2007-10-02

    Inventor: 牧野 厚雄

    CPC classification number: G11B5/4833 G11B5/4873 G11B5/6029

    Abstract:  低電圧で駆動可能で、応答性に優れ、温度ヒステリシスが狭く、高い分解能でのバネ圧制御が可能であって、それにより、即座にスライダ浮上距離を適正量に調整でき、スライダ浮上距離の安定化を図ることが可能なスライダ支持機構、バネ圧制御方法およびバネ圧制御装置を提供する。  本発明に係るスライダ支持機構は、表面側の先端部に、記録媒体にデータの記録・再生を行う磁気ヘッドを有するスライダが固定されたフレキシャと、前記スライダを前記記録媒体方向に付勢するバネ圧を生じさせるヒンジプレートと、前記ヒンジプレートの前部に接続されるロードビームと前記ヒンジプレートの後部に接続されるベースプレートとを備え、前記フレキシャは、裏面側の前部がロードビームに接続され、裏面側の後部がヒンジプレートの後部およびベースプレートの少なくとも一方に接続されると共に、前記バネ圧を制御する制御機構が設けられる。  

    Abstract translation: 可以用低电压驱动的滑块支撑机构,具有优异的响应和较窄的温度滞后,能够以高分辨率执行弹簧压力控制,从而将滑块的浮动距离瞬间调整到合理的水平,并稳定浮动距离 滑块。 还提供了弹簧压力控制方法和弹簧压力控制器。 滑动器支撑机构包括固定到表面侧的远端的挠曲件,并且具有用于在记录介质上记录/再现数据的磁头的滑块,产生弹簧压力的铰链板,该弹簧压力用于沿着方向 连接到铰链板的前部的负载梁和连接到铰链板的后部的基板。 弯曲部设置有用于控制弹簧压力的机构,该机构具有连接到负载梁的后侧上的前部,并且在后侧的后部连接到铰链板的后部中的至少一个和基板 。

    DETECTION OF FLY HEIGHT CHANGE IN A DISK DRIVE
    8.
    发明申请
    DETECTION OF FLY HEIGHT CHANGE IN A DISK DRIVE 审中-公开
    磁盘驱动器飞行高度变化的检测

    公开(公告)号:WO2006022976A2

    公开(公告)日:2006-03-02

    申请号:PCT/US2005/019968

    申请日:2005-06-07

    Inventor: YIPING, Ma

    CPC classification number: G11B5/6005 G11B5/41 G11B5/455 G11B5/6029

    Abstract: A method for detecting a change in fly-height comprises measuring a baseline position error signal, measuring a position error signal at later time, and comparing the measured change in PES to a predetermined value. If the measured change in PES is greater than the predetermined value, it is determined that a decrease in fly-height has occurred. Depending on whether the disk drive has a head cleaner or whether the PES signal changes occur only at the certain diameter of the disk, a head cleaning is initiated to correct the fly-height change. If no head cleaning is necessary, a general error signal may be generated to indicate potential drive failure.

    Abstract translation: 用于检测飞行高度变化的方法包括测量基线位置误差信号,在稍后时间测量位置误差信号并且将测得的PES变化与预定值相比较。 如果PES中的测量变化大于预定值,则确定已发生飞行高度的降低。 根据磁盘驱动器是否有磁头清洁器或PES信号是否仅在磁盘的特定直径处发生更改,将启动磁头清洁以纠正飞行高度变化。 如果不需要清洁头部,则可能会生成一般错误信号,指示潜在的驱动器故障。

    METHOD AND APPARATUS FOR DETECTING HEAD FLYING HEIGHT IN A DISK DRIVE
    9.
    发明申请
    METHOD AND APPARATUS FOR DETECTING HEAD FLYING HEIGHT IN A DISK DRIVE 审中-公开
    用于检测磁盘驱动器中的头部飞行高度的方法和装置

    公开(公告)号:WO1998026411A1

    公开(公告)日:1998-06-18

    申请号:PCT/US1997019019

    申请日:1997-10-10

    CPC classification number: G11B17/32 G11B5/6029

    Abstract: A system for determining whether the flying height of a read/write head above a disk (14) in a disk drive (10) is within an acceptable range, in substantially real time. The system relies on variations in read signal resolution with flying height to make the determination. In one embodiment, read signal resolution is measured and compared to a predetermined threshold value to determine whether the present flying height is in the desired range. In another embodiment, the number of peaks in a read signal that are detected (and/or not detected) by a detector is used to determine whether the head is in the proper flying height range. Because of read signal resolution effects, the number of detected peaks will decrease as the flying height of the head is decreased. The system also provides for postponing a transfer of data to/from the disk (14) when it is determined that the head is not within the acceptable range.

    Abstract translation: 一种用于确定磁盘驱动器(10)中的盘(14)上方的读/写头的飞行高度是否在实质上实时地处于可接受范围内的系统。 系统依赖于读取信号分辨率与飞行高度的变化进行确定。 在一个实施例中,测量读取信号分辨率并将其与预定阈值进行比较,以确定当前飞行高度是否在期望的范围内。 在另一个实施例中,由检测器检测(和/或未检测)的读取信号中的峰值数量用于确定头部是否处于适当的飞行高度范围内。 由于读取信号分辨率的影响,当头部的飞行高度减小时,检测到的峰值数量将减少。 当确定头部不在可接受的范围内时,系统还提供将数据传送到/从盘(14)传送的数据。

    SYSTEMS AND METHODS FOR VARIABLE COMPENSATED FLY HEIGHT MEASUREMENT
    10.
    发明申请
    SYSTEMS AND METHODS FOR VARIABLE COMPENSATED FLY HEIGHT MEASUREMENT 审中-公开
    可变补偿飞行高度测量的系统和方法

    公开(公告)号:WO2010014078A1

    公开(公告)日:2010-02-04

    申请号:PCT/US2008/071367

    申请日:2008-07-28

    Inventor: GRAEF, Nils

    CPC classification number: G11B5/6029 G11B5/6064

    Abstract: Various embodiments of the present invention provide systems and methods for determining fly height. For example, a system for fly height determination is disclosed that includes a head assembly disposed in relation to a storage medium, a write channel, and a read circuit. The read circuit is operable to receive information from both the head assembly and the write channel. A frequency determination circuit is included that is operable to receive a first signal from the read circuit corresponding to information received from the write channel and to provide a first fundamental frequency and a first higher order frequency based on the first signal, and the frequency determination circuit is operable to receive a second signal from the read circuit corresponding to information received from the head assembly channel and to provide a second fundamental frequency and a second higher order frequency based on the second signal. A compensation variable calculation module is included that is operable to divide the first fundamental frequency by the first higher order harmonic to yield a compensation variable. A fly height calculation module is included that is operable to divide the second fundamental frequency by the second higher order harmonic and the compensation variable to yield an indication of a distance between the head assembly and the storage medium.

    Abstract translation: 本发明的各种实施例提供了用于确定飞行高度的系统和方法。 例如,公开了一种用于飞行高度确定的系统,其包括相对于存储介质,写入通道和读取电路设置的头部组件。 读取电路可操作以从头部组件和写入通道两者接收信息。 包括频率确定电路,其可操作以从对应于从写入通道接收的信息的读取电路接收第一信号,并且基于第一信号提供第一基频和第一较高阶频率,频率确定电路 可操作以从所述读取电路接收对应于从所述头组件通道接收的信息的第二信号,并且基于所述第二信号提供第二基频和第二较高阶频率。 包括补偿变量计算模块,其可操作以将第一基频除以第一高次谐波以产生补偿变量。 包括飞行高度计算模块,其可操作以将第二基频除以第二高次谐波和补偿变量,以产生头组件和存储介质之间的距离的指示。

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