JP6139414B2 - 接触検出 - Google Patents

接触検出 Download PDF

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Publication number
JP6139414B2
JP6139414B2 JP2013556629A JP2013556629A JP6139414B2 JP 6139414 B2 JP6139414 B2 JP 6139414B2 JP 2013556629 A JP2013556629 A JP 2013556629A JP 2013556629 A JP2013556629 A JP 2013556629A JP 6139414 B2 JP6139414 B2 JP 6139414B2
Authority
JP
Japan
Prior art keywords
signal
frequency
output signal
actuator
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2013556629A
Other languages
English (en)
Japanese (ja)
Other versions
JP2014507044A5 (enExample
JP2014507044A (ja
Inventor
リウ，ドンミン
チョウ，リン
ハイムズ，アダム・ケイ
ニッペンバーグ，リー・シィ
ジョンソン，マイケル・ティ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seagate Technology LLC filed Critical Seagate Technology LLC
Publication of JP2014507044A publication Critical patent/JP2014507044A/ja
Publication of JP2014507044A5 publication Critical patent/JP2014507044A5/ja
Application granted granted Critical
Publication of JP6139414B2 publication Critical patent/JP6139414B2/ja
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6011—Control of flying height
    • G11B5/6029—Measurement using values derived from the data signal read from the disk
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6011—Control of flying height
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6011—Control of flying height
    • G11B5/6076—Detecting head-disk contact
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2508—Magnetic discs
    • G11B2220/2516—Hard disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6011—Control of flying height
    • G11B5/607—Control of flying height using thermal means

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Digital Magnetic Recording (AREA)
JP2013556629A 2011-02-28 2012-01-30 接触検出 Expired - Fee Related JP6139414B2 (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US13/036,184 US8730611B2 (en) 2011-02-28 2011-02-28 Contact detection
US13/036,184 2011-02-28
PCT/US2012/023118 WO2012118583A1 (en) 2011-02-28 2012-01-30 Contact detection

Publications (3)

Publication Number Publication Date
JP2014507044A JP2014507044A (ja) 2014-03-20
JP2014507044A5 JP2014507044A5 (enExample) 2014-10-16
JP6139414B2 true JP6139414B2 (ja) 2017-05-31

Family

ID=45852691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013556629A Expired - Fee Related JP6139414B2 (ja) 2011-02-28 2012-01-30 接触検出

Country Status (6)

Country Link
US (2) US8730611B2 (enExample)
EP (1) EP2681736A1 (enExample)
JP (1) JP6139414B2 (enExample)
KR (1) KR101947347B1 (enExample)
CN (1) CN103493132B (enExample)
WO (1) WO2012118583A1 (enExample)

Families Citing this family (18)

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US8885279B1 (en) * 2010-08-30 2014-11-11 Western Digital Technologies, Inc. Disk drive detecting head/disk contact by evaluating a subset of touchdown metrics during a servo sector interrupt
US8730611B2 (en) 2011-02-28 2014-05-20 Seagate Technology Llc Contact detection
US8681445B1 (en) 2012-06-28 2014-03-25 Western Digital Technologies, Inc. Disk drive detecting head touchdown by computing anti-correlation in sensor signal
US8970978B1 (en) * 2012-10-22 2015-03-03 Western Digital Technologies, Inc. Disk drive detecting head touchdown by applying DC+AC control signal to fly height actuator
US8638349B1 (en) * 2013-03-11 2014-01-28 Seagate Technology Llc Head-medium contact detection using introduced heat oscillation
US8953275B2 (en) 2013-06-17 2015-02-10 Seagate Technology Llc In situ sensor based contact detection
US8908317B1 (en) * 2014-01-27 2014-12-09 Kabushiki Kaisha Toshiba Method for detecting touchdown of head and disk storage apparatus
US9053729B1 (en) 2014-07-23 2015-06-09 Seagate Technology Llc Nonlinearity-based contact prediction
US9595280B2 (en) * 2015-02-26 2017-03-14 Western Digital Technologies, Inc Hard disk drive head-disk interface dithering
US9443543B1 (en) * 2015-03-11 2016-09-13 Kabushiki Kaisha Toshiba Disk storage device and method for controlling head flying height
JP6349279B2 (ja) * 2015-03-25 2018-06-27 日本発條株式会社 電子部品の接合強度試験装置及び接合強度試験方法
US9466328B1 (en) * 2015-05-22 2016-10-11 Kabushiki Kaisha Toshiba Contact-detecting method, manufacturing method of disk drive, and disk drive
US9437234B1 (en) 2015-08-20 2016-09-06 Seagate Technology Llc Head-medium contact detection using high frequency heater oscillation
US9761270B1 (en) 2016-12-21 2017-09-12 Seagate Technology Llc Data storage device using high and low frequencies AC heat produce position-error-signals for head contact detection
JP6390774B1 (ja) 2017-09-13 2018-09-19 株式会社明電舎 動力計制御装置
US10217481B1 (en) 2018-03-19 2019-02-26 Western Digital Technologies, Inc. Data storage device employing low duty cycle square wave to detect head touchdown
US11150150B2 (en) 2018-09-07 2021-10-19 Meidensha Corporation Dynamometer control device
JP6737363B1 (ja) 2019-02-28 2020-08-05 株式会社明電舎 動力計制御装置

Family Cites Families (35)

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Publication number Priority date Publication date Assignee Title
US6008640A (en) 1997-04-28 1999-12-28 Seagate Technology, Inc. Detection and measurement of head disc interference using read back signal (without acoustic emission sensor or laser doppler vibrometer)
US6097559A (en) * 1998-06-26 2000-08-01 International Business Machines Corporation System and method for detecting head-to-disk contact in-situ a direct access storage device using a position error signal
US6822821B2 (en) 2001-01-19 2004-11-23 Seagate Technology Llc Method and apparatus for predicting a head crash in a disc drive
US6967805B1 (en) 2002-04-09 2005-11-22 Seagate Technology Llc In-situ monitoring of proximity and contact between a slider and a disc in a disc drive
US7038875B2 (en) 2003-07-31 2006-05-02 Seagate Technology Llc Dynamic measurement of head media spacing modulation
US7016139B2 (en) * 2003-10-22 2006-03-21 Hitachi Global Storage Netherlands B.V. Magnetic recording disk drive with actively controlled electric potential at the head/disk interface for wear and durability control
US7158325B1 (en) * 2003-11-06 2007-01-02 Maxtor Corporation Disk drive head touchdown detection with improved discrimination
KR100640621B1 (ko) * 2004-12-28 2006-11-01 삼성전자주식회사 디스크 드라이브의 자기 헤드 비행 높이 조정 장치 및 방법
US7564649B2 (en) 2005-04-27 2009-07-21 Seagate Technology Llc Head assembly having a sensing element to provide feedback for head-media instability
US7808746B2 (en) 2005-08-11 2010-10-05 Seagate Technology Llc Method and apparatus for active control of spacing between a head and a storage medium
US7215495B1 (en) * 2005-12-27 2007-05-08 Hitachi Global Storage Technologies Netherlands B.V. System and method for determining head-disk contact in a magnetic recording disk drive
JP2007234113A (ja) * 2006-02-28 2007-09-13 Fujitsu Ltd ディスク装置およびディスク装置の制御方法
US7292401B2 (en) * 2006-03-14 2007-11-06 Hitachi Global Storage Technologies Netherlands B.V. System and method for determining head-disk contact in a magnetic recording disk drive by magnetoresistive signal amplitude
JP4362491B2 (ja) * 2006-03-31 2009-11-11 富士通株式会社 磁気ヘッドの磁気スペーシング制御方法、リード／ライト回路及びそれを用いた磁気ディスク装置
US20070291401A1 (en) 2006-05-19 2007-12-20 Maxtor Corporation Contact detection using calibrated seeks
JP2008097760A (ja) * 2006-10-13 2008-04-24 Fujitsu Ltd ヘッドスライダ用接触判定装置および接触判定方法並びに記憶媒体駆動装置
JP2008159160A (ja) * 2006-12-22 2008-07-10 Fujitsu Ltd 磁気ディスク装置及び磁気ヘッド浮上量制御方法
US7375914B1 (en) * 2007-02-27 2008-05-20 Hitachi Global Storage Technologies Netherlands B.V. Disk drive with improved method for operating a thermal head fly-height actuator
JP2008234745A (ja) * 2007-03-19 2008-10-02 Hitachi Global Storage Technologies Netherlands Bv ヘッドとディスクとの間のクリアランス調整量を制御する制御値を決定する方法、ディスク・ドライブ装置及びその製造方法
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JP2009087405A (ja) * 2007-09-27 2009-04-23 Hitachi Global Storage Technologies Netherlands Bv ディスク・ドライブ装置、その製造方法及びクリアランス調整するヒータのヒータ・パワー値を設定する方法
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Also Published As

Publication number Publication date
CN103493132A (zh) 2014-01-01
US20140254344A1 (en) 2014-09-11
US20120218659A1 (en) 2012-08-30
US8730611B2 (en) 2014-05-20
EP2681736A1 (en) 2014-01-08
KR101947347B1 (ko) 2019-02-12
KR20140010409A (ko) 2014-01-24
CN103493132B (zh) 2017-05-24
US9135938B2 (en) 2015-09-15
WO2012118583A1 (en) 2012-09-07
JP2014507044A (ja) 2014-03-20

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