WO2008149693A1 - 落下検知装置、磁気ディスク装置および携帯電子機器 - Google Patents

落下検知装置、磁気ディスク装置および携帯電子機器 Download PDF

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Publication number
WO2008149693A1
WO2008149693A1 PCT/JP2008/059546 JP2008059546W WO2008149693A1 WO 2008149693 A1 WO2008149693 A1 WO 2008149693A1 JP 2008059546 W JP2008059546 W JP 2008059546W WO 2008149693 A1 WO2008149693 A1 WO 2008149693A1
Authority
WO
WIPO (PCT)
Prior art keywords
stage
state
considered
drop
portable electronic
Prior art date
Application number
PCT/JP2008/059546
Other languages
English (en)
French (fr)
Inventor
Akihiko Shibata
Original Assignee
Murata Manufacturing Co., Ltd.
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 Murata Manufacturing Co., Ltd. filed Critical Murata Manufacturing Co., Ltd.
Priority to JP2009517792A priority Critical patent/JPWO2008149693A1/ja
Publication of WO2008149693A1 publication Critical patent/WO2008149693A1/ja
Priority to US12/628,196 priority patent/US8164847B2/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G01P15/0891—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values with indication of predetermined acceleration values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/18—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration in two or more dimensions
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
    • G11B19/041—Detection or prevention of read or write errors
    • G11B19/043—Detection or prevention of read or write errors by detecting a free-fall condition
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/12—Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position otherwise than during transducing operation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G11B33/08—Insulation or absorption of undesired vibrations or sounds
    • 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
    • G11B5/40—Protective measures on heads, e.g. against excessive temperature 
    • 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
    • G11B5/54—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 into or out of its operative position or across tracks
    • 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
    • G11B5/54—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 into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5582—Track change, selection or acquisition by displacement of the head across disk tracks system adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused by a shock

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Telephone Function (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

　加速度の絶対値の微分値がほぼ０である第１段階（Ｓ１：定常状態）から負のしきい値ＤＡｔｈ１より負方向に下回ることを検出して第２段階（Ｓ２：落下開始状態）と見なし、その後の加速度の絶対値がしきい値Ａｔｈ１より下回ったとき第３段階（Ｓ３：低重力状態）になったものとし、この低重力状態が所定時間Ｔ３を継続した時、第４段階（Ｓ４：落下中状態）と見なして落下検知信号を出力する。これにより、ソフトウェアで判定を行う場合の処理負荷を軽減して且つ落下予測も行えるようにした。
PCT/JP2008/059546 2007-06-05 2008-05-23 落下検知装置、磁気ディスク装置および携帯電子機器 WO2008149693A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2009517792A JPWO2008149693A1 (ja) 2007-06-05 2008-05-23 落下検知装置、磁気ディスク装置および携帯電子機器
US12/628,196 US8164847B2 (en) 2007-06-05 2009-11-30 Fall detection device, magnetic disk device, and portable electronic apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-149053 2007-06-05
JP2007149053 2007-06-05

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/628,196 Continuation US8164847B2 (en) 2007-06-05 2009-11-30 Fall detection device, magnetic disk device, and portable electronic apparatus

Publications (1)

Publication Number Publication Date
WO2008149693A1 true WO2008149693A1 (ja) 2008-12-11

Family

ID=40093517

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/059546 WO2008149693A1 (ja) 2007-06-05 2008-05-23 落下検知装置、磁気ディスク装置および携帯電子機器

Country Status (4)

Country Link
US (1) US8164847B2 (ja)
JP (1) JPWO2008149693A1 (ja)
TW (1) TW200918898A (ja)
WO (1) WO2008149693A1 (ja)

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CN111521843A (zh) * 2019-02-01 2020-08-11 精工爱普生株式会社 传感器系统和传感器的落下判定方法

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JP5061274B2 (ja) * 2006-03-31 2012-10-31 新世代株式会社 衝撃検出装置及び擬似体験装置のコントローラ
CN102099859B (zh) * 2008-07-23 2015-04-15 株式会社村田制作所 下落检测装置、磁盘装置、以及便携式电子设备
JP2011233197A (ja) * 2010-04-27 2011-11-17 Sony Corp 情報処理装置およびそのヘッド退避処理方法
CN102269643A (zh) * 2010-06-03 2011-12-07 纬创资通股份有限公司 测量系统及测量方法
CN102685324A (zh) * 2012-04-23 2012-09-19 华为终端有限公司 自动备份数据的方法及装置
US9076471B1 (en) * 2013-07-31 2015-07-07 Western Digital Technologies, Inc. Fall detection scheme using FFS
US9058826B1 (en) 2014-02-13 2015-06-16 Western Digital Technologies, Inc. Data storage device detecting free fall condition from disk speed variations
JP6396186B2 (ja) * 2014-11-17 2018-09-26 ラピスセミコンダクタ株式会社 半導体装置、携帯端末装置および操作検知方法
US10540239B2 (en) * 2016-05-25 2020-01-21 International Business Machines Corporation Back-up of information stored in mobile computing devices
JP2019125858A (ja) 2018-01-12 2019-07-25 シャープ株式会社 電子機器、制御装置および制御プログラム

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111521843A (zh) * 2019-02-01 2020-08-11 精工爱普生株式会社 传感器系统和传感器的落下判定方法
CN111521843B (zh) * 2019-02-01 2022-09-09 精工爱普生株式会社 传感器系统和传感器的落下判定方法

Also Published As

Publication number Publication date
US8164847B2 (en) 2012-04-24
JPWO2008149693A1 (ja) 2010-08-26
US20100073812A1 (en) 2010-03-25
TWI359272B (ja) 2012-03-01
TW200918898A (en) 2009-05-01

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