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    Head to media interface monitoring
    2.
    发明授权
    Head to media interface monitoring 有权

    公开(公告)号：US09953673B2

    公开(公告)日：2018-04-24

    申请号：US15200439

    申请日：2016-07-01

    Applicant: Seagate Technology LLC

    Inventor： Antanas Daugela ,  Jon D. Trantham ,  Scott E. Ryun

    IPC: G11B21/02 ,  G11B5/60

    CPC classification number: G11B5/6076 ,  G11B5/5534 ,  G11B5/607

    Abstract: A storage device disclosed herein includes a transducer head with a proximity sensor that generates head-disc proximity signals, a digitizer configured to convert the analog proximity signals from the proximity sensor to digitized sample data, a discrete wavelet transformation (DWT) module configured to analyze the digitized sample data by performing an enhanced DWT on the digitized sample data to generate DWT coefficients, and a modal filter configured to determine dominant head-disc interference (HDI) modes for a transducer head by analyzing the DWT coefficients.

    HEAD TO MEDIA INTERFACE MONITORING
    5.
    发明申请
    HEAD TO MEDIA INTERFACE MONITORING 有权

    公开(公告)号：US20180005657A1

    公开(公告)日：2018-01-04

    申请号：US15200439

    申请日：2016-07-01

    Applicant: Seagate Technology LLC

    Inventor： Antanas Daugela ,  Jon D. Trantham ,  Scott E. Ryun

    IPC: G11B5/60

    CPC classification number: G11B5/6076 ,  G11B5/5534 ,  G11B5/607

    Abstract: A storage device disclosed herein includes a transducer head with a proximity sensor that generates head-disc proximity signals, a digitizer configured to convert the analog proximity signals from the proximity sensor to digitized sample data, a discrete wavelet transformation (DWT) module configured to analyze the digitized sample data by performing an enhanced DWT on the digitized sample data to generate DWT coefficients, and a modal filter configured to determine dominant head-disc interference (HDI) modes for a transducer head by analyzing the DWT coefficients.

    Head-medium contact detection using introduced heat oscillation
    6.
    发明授权
    Head-medium contact detection using introduced heat oscillation 有权
    使用引入热振荡的头 - 介质接触检测

    公开(公告)号：US09047898B2

    公开(公告)日：2015-06-02

    申请号：US14165906

    申请日：2014-01-28

    Applicant: Seagate Technology LLC

    Inventor： Dongming Liu ,  Kenneth Haapala ,  Scott E. Ryun ,  Lin Zhou

    IPC: G11B5/02 ,  G11B5/58 ,  G11B5/60

    CPC classification number: G11B5/581 ,  G11B5/607 ,  G11B5/6076

    Abstract: An apparatus includes a head transducer configured to interact with a magnetic recording medium and a heater configured to thermally actuate the head transducer. A thermal sensor at or near the head transducer is configured to produce a sensor signal. Circuitry is coupled to the heater and configured to cause an oscillation in heater power. The heater power oscillation causes an oscillation in the sensor signal. A detector is coupled to the thermal sensor and configured to detect head-medium contact using the oscillating sensor signal and heater power.

    Abstract translation: 一种装置包括：头部换能器，被配置为与磁记录介质相互作用;以及加热器，其被配置为热致动头部换能器。 在头部传感器处或附近的热传感器被配置成产生传感器信号。 电路耦合到加热器并且被配置为引起加热器功率的振荡。 加热器功率振荡导致传感器信号的振荡。 检测器耦合到热传感器并且被配置为使用振荡传感器信号和加热器功率检测头 - 介质接触。

    Narrow band dwell monitoring
    7.
    发明授权
    Narrow band dwell monitoring 有权

    公开(公告)号：US10319397B2

    公开(公告)日：2019-06-11

    申请号：US15971158

    申请日：2018-05-04

    Applicant: Seagate Technology LLC

    Inventor： Scott E. Ryun ,  Brian R. Pollock ,  Ryan Todd Lyle ,  Ryan Thomas Herbison ,  Richard Arthur Herr ,  Paul W. Burnett

    IPC: G11B5/725 ,  G11B5/265 ,  G11B5/455 ,  G11B5/60

    Abstract: Narrow band dwell occurs when air bearings corresponding to a set of read and/or write heads within a hard disc drive remain within a fixed narrow band of one or more storage platters for an extended period of time. The air bearings displace lubricant on the storage platters and may redeposit the lubricant as droplets on the platters. The presently disclosure technology is directed to monitoring a hard disc drive for narrow band dwell, and in some implementations, implementing operations to mitigate narrow band dwell. More specifically, the presently disclosure technology may detect an overflying air-bearing slider position, apply a lubrication film displacement formula to a narrow band of the storage platter, apply a lubrication film reflow formula to one or more other narrow bands of the storage platter, and track lubrication film thickness over time in each of the narrow bands of the storage platter.

    HEAD-MEDIUM CONTACT DETECTION USING INTRODUCED HEAT OSCILLATION
    8.
    发明申请
    HEAD-MEDIUM CONTACT DETECTION USING INTRODUCED HEAT OSCILLATION 审中-公开
    使用引入的热振荡进行中间接触检测

    公开(公告)号：US20140254040A1

    公开(公告)日：2014-09-11

    申请号：US14165906

    申请日：2014-01-28

    Applicant: Seagate Technology LLC

    Inventor： Dongming Liu ,  Kenneth Haapala ,  Scott E. Ryun ,  Lin Zhou

    IPC: G11B5/58

    CPC classification number: G11B5/581 ,  G11B5/607 ,  G11B5/6076

    Abstract: An apparatus includes a head transducer configured to interact with a magnetic recording medium and a heater configured to thermally actuate the head transducer. A thermal sensor at or near the head transducer is configured to produce a sensor signal. Circuitry is coupled to the heater and configured to cause an oscillation in heater power. The heater power oscillation causes an oscillation in the sensor signal. A detector is coupled to the thermal sensor and configured to detect head-medium contact using the oscillating sensor signal and heater power.

    Abstract translation: 一种装置包括：头部换能器，被配置为与磁记录介质相互作用;以及加热器，其被配置为热致动头部换能器。 在头部传感器处或附近的热传感器被配置成产生传感器信号。 电路耦合到加热器并且被配置为引起加热器功率的振荡。 加热器功率振荡导致传感器信号的振荡。 检测器耦合到热传感器并且被配置为使用振荡传感器信号和加热器功率检测头 - 介质接触。

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