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WO2009037970A1 - 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
WO2009037970A1
WO2009037970A1 PCT/JP2008/065835 JP2008065835W WO2009037970A1 WO 2009037970 A1 WO2009037970 A1 WO 2009037970A1 JP 2008065835 W JP2008065835 W JP 2008065835W WO 2009037970 A1 WO2009037970 A1 WO 2009037970A1
Authority
WO
WIPO (PCT)
Prior art keywords
drop
mobile electronic
magnetic disc
drop detection
detection device
Prior art date
Application number
PCT/JP2008/065835
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 JP2009533101A priority Critical patent/JP5603597B2/ja
Publication of WO2009037970A1 publication Critical patent/WO2009037970A1/ja
Priority to US12/727,795 priority patent/US8676532B2/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
    • G01P15/18—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration in two or more dimensions
    • 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
    • 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
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0219—Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
    • A61B5/1116—Determining posture transitions
    • A61B5/1117—Fall detection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Alarm Devices (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)

Abstract

　ソフトウェアで判定を行う場合の処理負荷を軽減するとともに落下開始を確実に判定できるようにし、また必要に応じて落下予測も行えるようにした落下検知装置、それを備えた磁気ディスク装置および携帯電子機器を構成する。 　直交３軸方向の加速度（ax，ay，az）を求め、３軸方向の各加速度について、定常時の加速度（ax0，ay0，az0）と落下判定時の加速度（ax，ay，az）との差が大きくなるほど評価値が大きくなる評価関数に基づいて評価値を求め、この評価値が所定のしきい値を超えるか否かによって落下開始を判定する。
PCT/JP2008/065835 2007-09-21 2008-09-03 落下検知装置、磁気ディスク装置および携帯電子機器 WO2009037970A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2009533101A JP5603597B2 (ja) 2007-09-21 2008-09-03 落下検知装置、磁気ディスク装置および携帯電子機器
US12/727,795 US8676532B2 (en) 2007-09-21 2010-03-19 Fall detection device, magnetic disk drive, and portable electronic apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007244737 2007-09-21
JP2007-244737 2007-09-21

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/727,795 Continuation US8676532B2 (en) 2007-09-21 2010-03-19 Fall detection device, magnetic disk drive, and portable electronic apparatus

Publications (1)

Publication Number Publication Date
WO2009037970A1 true WO2009037970A1 (ja) 2009-03-26

Family

ID=40467789

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/065835 WO2009037970A1 (ja) 2007-09-21 2008-09-03 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 (3)

Country Link
US (1) US8676532B2 (ja)
JP (1) JP5603597B2 (ja)
WO (1) WO2009037970A1 (ja)

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CN102542724A (zh) * 2011-12-15 2012-07-04 上海移为通信技术有限公司 跌落检测报警方法
JP2013130532A (ja) * 2011-12-22 2013-07-04 Sharp Corp 落下衝撃検知装置
JP2014209389A (ja) * 2014-08-07 2014-11-06 トムソン ライセンシングＴｈｏｍｓｏｎ Ｌｉｃｅｎｓｉｎｇ 装置に対する電力を節約する機器及び方法
US9380249B2 (en) 2010-03-11 2016-06-28 Thomson Licensing System and method for conserving power for devices
JP2017091496A (ja) * 2016-04-21 2017-05-25 株式会社Ｃｙｇａｍｅｓ 情報処理装置、情報処理方法及びプログラム
CN110954972A (zh) * 2019-11-11 2020-04-03 安徽华米信息科技有限公司 可穿戴设备及其脱落检测方法、装置、存储介质
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CN103581852B (zh) * 2013-09-30 2018-03-06 吴家宝 人体摔倒检测的方法、装置及移动终端系统
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CN105389957B (zh) * 2015-10-29 2017-12-29 小米科技有限责任公司 可穿戴设备的通信方法、装置及系统
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9380249B2 (en) 2010-03-11 2016-06-28 Thomson Licensing System and method for conserving power for devices
CN102542724A (zh) * 2011-12-15 2012-07-04 上海移为通信技术有限公司 跌落检测报警方法
JP2013130532A (ja) * 2011-12-22 2013-07-04 Sharp Corp 落下衝撃検知装置
JP2014209389A (ja) * 2014-08-07 2014-11-06 トムソン ライセンシングＴｈｏｍｓｏｎ Ｌｉｃｅｎｓｉｎｇ 装置に対する電力を節約する機器及び方法
US10909224B2 (en) 2015-11-13 2021-02-02 Cygames, Inc. Information processing device, information processing method, and program for tampering detection
JP2017091496A (ja) * 2016-04-21 2017-05-25 株式会社Ｃｙｇａｍｅｓ 情報処理装置、情報処理方法及びプログラム
CN110954972A (zh) * 2019-11-11 2020-04-03 安徽华米信息科技有限公司 可穿戴设备及其脱落检测方法、装置、存储介质
CN110954972B (zh) * 2019-11-11 2022-04-15 安徽华米信息科技有限公司 可穿戴设备及其脱落检测方法、装置、存储介质

Also Published As

Publication number Publication date
US8676532B2 (en) 2014-03-18
JP5603597B2 (ja) 2014-10-08
US20100172052A1 (en) 2010-07-08
JPWO2009037970A1 (ja) 2011-01-06

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