EP1642248B1 - Einrichtung zur anzeige eines falls - Google Patents

Einrichtung zur anzeige eines falls Download PDF

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Publication number
EP1642248B1
EP1642248B1 EP04742253A EP04742253A EP1642248B1 EP 1642248 B1 EP1642248 B1 EP 1642248B1 EP 04742253 A EP04742253 A EP 04742253A EP 04742253 A EP04742253 A EP 04742253A EP 1642248 B1 EP1642248 B1 EP 1642248B1
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EP
European Patent Office
Prior art keywords
fall
sensor
portable device
alarm
change
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Active
Application number
EP04742253A
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English (en)
French (fr)
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EP1642248A1 (de
Inventor
Eelis CEDERSTRÖM
Ilkka Korhonen
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IST International Security Technology Oy
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IST International Security Technology Oy
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Publication of EP1642248A1 publication Critical patent/EP1642248A1/de
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/04—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons
    • G08B21/0407—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis
    • G08B21/0415—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis detecting absence of activity per se
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/04—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons
    • G08B21/0407—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis
    • G08B21/043—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis detecting an emergency event, e.g. a fall
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/04—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons
    • G08B21/0438—Sensor means for detecting
    • G08B21/0446—Sensor means for detecting worn on the body to detect changes of posture, e.g. a fall, inclination, acceleration, gait

Definitions

  • the invention relates to a device for indicating a fall, the device comprising a portable device attached to the wrist or elsewhere on the body.
  • Falling accidents are common among the elderly. Following a fall, an elderly person is often unable to stand up again by himself and thus requires help.
  • an elderly person is himself able to summon help by pressing the alarm button he carries on his person.
  • the problem with this method is, however, that the elderly person may be so badly injured as a result of the fall that he will not be able to summon help, for example, due to unconsciousness.
  • An automatic fall detector system could generate an alarm automatically, should the elderly person himself be unable to stand up or activate the alarm.
  • the automatic safety alarm devices currently in use which are able to activate an alarm even if the user is unable to do so, apply two methods based on different principles to such falling situations.
  • the IST Vivago wrist-care measures movements from the user's wrist. Should no movements be detected, or if the number of movements is low for a longer period of time, the device will send an automatic alarm. The idea is that this state is not normal. The device is unable to detect falls directly, but it can detect an immobility state possibly following a fall and thus trigger an alarm. The problem with the method is that an alarm of this type is not very specific and to avoid false alarms, the alarm delay must be relatively long (30 min. to 3 h).
  • the fall detectors described, for example, in the patent applications GB 2323196, EP 0 877 346 A and EP 1 128 349 A1 are based on measuring the acceleration, speed and posture of the body and by means of them, on indicating the falling incident through various algorithms. Studies have shown that one such device is relatively reliable and has a short delay, but the problem with this and all other corresponding methods is the usability of the device. In the method, the state of moving is measured by means of a device that must be carried attached to the trunk, for example on a belt. If attached to the extremities, for example the wrist, the device will not function. The use of a separate device that has to be carried on a belt will in practice often be neglected, which means that help will not be available when needed. In practice, the most suitable locations for the device in long-term use are in a wristband and a pendant.
  • An optimal fall detector should be easy to carry, reliable and have as short an alarm delay as possible.
  • the aim of the invention is to provide a device by means of which the problems relating to the above-mentioned methods and devices can be avoided.
  • a preferred embodiment of the invention is based on the fact that by means of a sensitive barometer (air pressure sensor) fitted to a safety wristband, or corresponding portable alarm device, can be detected differences in air pressure that correspond to a vertical displacement of some 0.5 m .
  • the required measurement resolution is achieved, for example, by means of sport wrist computers that comprise an altimeter, or height meter based on the measurement of air pressure.
  • the indication of a fall is based on a rapid change in measured air pressure.
  • the reliability of the fall alarm can be increased.
  • both the big movement caused by the fall, and a motionless state following the fall, which may be due to, for example, unconsciousness, may be detected.
  • Changes in ambient air pressure resulting from opening doors or air conditioning in the apartment may be compensated for by means of another reference sensor fixedly installed in the apartment.
  • the safety alarm devices transmit the alarms and any measurement data to a fixed base station in the apartment wirelessly by means of a short-range radio transmitter.
  • a second pressure sensor for measuring the air pressure in the apartment.
  • the portable alarm device sends the air pressure data to the base station it is able to compare the changed data with the signal of its own pressure sensor. If the same change is detected by both sensors at the same time, this refers to a change in the ambient pressure and is not related to falling.
  • the reliability of fall detection can also be increased if the wristband or portable alarm device identifies automatically that it is properly carried by the user. In the case of a wristband, this may advantageously be done, for example, by impedance measurement of the skin on the wrist. If the device does not identify being attached to the arm, pressure changes will not indicate a fall. In this way, false alarms resulting, for example, from dropping the device can be eliminated.
  • Figure 1 shows a safety wristband 1 carried by the user which is in wireless data communication with the base station 2 located on the same premises or in the same apartment 14 as the user.
  • the safety wristband 1 comprises a sensitive pressure sensor 5 for measuring changes in air pressure, a movement sensor 6 for measuring changes (accelerations) in the state of movement, and a sensor 7 for identifying the wearing on the wrist.
  • the functioning of the sensor 7 may be based, for example, on impedance measurement of the skin.
  • the measurement data from the sensors 5, 6, 7 are entered in a processor 3, which formulates an indication of the fall from the measurement results, or sends the data on the measurement results to the base station 2 by means of a transmitter 4, in which case the base station uses the measurement data from the sensors 5, 6, 7 for analysing and indicating the falling incident. Alternatively, analysis and indication may be done already on the processor of the portable device 1.
  • the base station 2 includes a receiver 8 which relays the measurement data from the device 1 to the processor 9.
  • the base station 2 has a second, stationary pressure sensor 10, which functions as a reference sensor of pressure changes and which is connected to the processor 9.
  • An alarm on a possible falling incident can be sent through a modem 11 and the telephone network 12 to the call centre 13 or other recipient.
  • One possible fall detection algorithm could be, for example, the following:
  • the algorithm can be optimised by using real measurement data from real sensors.
  • Figure 2 illustrates graphically the behaviour of the measuring signals in a falling incident.
  • the rapid change in the height of the wristband resulting from the fall is detected by the sensor 5 measuring the differences in height, which is an air pressure sensor in the embodiment disclosed.
  • Changes in air pressure may, however, occur often due to various reasons: moving in stairs, changes in the air pressure of the room, etc.
  • Changes in the environment may advantageously be compensated for by a second, stationary reference sensor 10.
  • Other normal changes in height due to the user moving can be distinguished by combining a specific change in air pressure with a rapid change in the state of movement and a possible discontinuation of movement following it.
  • Measurement of changes in posture may also be used for the same purpose.
  • the wristband 1 comprises a posture measurement sensor in addition to or instead of the movement sensor 6. Pressure changes due to the moving of the device alone can be compensated for automatically by identifying whether the device is on the wrist or otherwise properly carried.
  • a special application of the device according to the invention is a fall alarm connected to a safety telephone or other safety service of special groups, particularly the elderly.
  • the sensor 5 for measuring height difference may also be other than a sensor measuring changes in air pressure. It may be based on, for example, 3-dimensional indoor positioning, or on indoor positioning applying radio technology and time modulation in general, by means of which changes in relative height can also be measured.

Claims (13)

  1. Fallanzeigegerät (1, 2), bestehend aus einer tragbaren Vorrichtung (1) zur Befestigung am Handgelenk oder an einer anderen Stelle des Körpers,
    dadurch gekennzeichnet, dass
    die tragbare Vorrichtung (1) einen Sensor (5) zur Messung von Höhendifferenzen aufweist, und ein Fall durch eine Änderung der durch die Vorrichtung gemessenen relativen Höhe angezeigt wird.
  2. Gerät nach Anspruch 1,
    dadurch gekennzeichnet, dass
    der Sensor (5), der die Höhendifferenzen misst, ein Sensor (5) ist, der Luftdruck misst und einen Fall durch eine Änderung des von der Vorrichtung gemessenen Luftdrucks anzeigt, die durch eine Verringerung der Höhe der tragbaren Vorrichtung (1) hervorgerufen wird.
  3. Gerät nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass
    die tragbare Vorrichtung (1) weiterhin einen Sensor (6) zur Bewegungsmessung aufweist, und ein Fall angezeigt wird, wenn sich die gemessene relative Höhe ändert und gleichzeitig der Bewegungssensor (6) eine schnelle Bewegung der Hand oder des Körpers infolge des Falls feststellt.
  4. Gerät nach Anspruch 3,
    dadurch gekennzeichnet, dass
    das Gerät (1, 2) eine Datenverarbeitungseinheit (3/9) aufweist, die so ausgebildet ist, dass sie einen Fall durch Messungen der relativen Höhe und Bewegung anzeigt, wenn einer Änderung der relativen Höhe ein bewegungsloser Zustand des Benutzers folgt, der für eine bestimmte Periode andauert.
  5. Gerät nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass
    die tragbare Vorrichtung (1) weiterhin einen Sensor zur Messung der Körperhaltung aufweist, und ein Fall angezeigt wird, wenn sich die gemessene relative Höhe ändert und gleichzeitig der Körperhaltungssensor eine rasche Änderung der Haltung der Hand oder des Körpers infolge des Falls feststellt.
  6. Gerät nach Anspruch 5,
    gekennzeichnet durch
    eine Datenverarbeitungseinheit (3/9), die so ausgebildet ist, dass sie ein Fallen durch Messungen der relativen Höhe und Körperhaltung anzeigt, wenn einer relativen Höhe ein Zustand folgt, der für eine bestimmte Periode andauert, während der sich die Haltung des Benutzers nicht ändert.
  7. Gerät nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet, dass
    die tragbare Vorrichtung (1) einen Sensor (7) zum Identifizieren des Tragens am Handgelenk aufweist, durch den die tragbare Vorrichtung (1) automatisch erkennt, ob sie vom Benutzer getragen wird oder nicht, und ein Fallen nur angezeigt wird, wenn die tragbare Vorrichtung (1) feststellt, dass sie vom Benutzer getragen wird.
  8. Gerät nach einem der Ansprüche 1 bis 7,
    dadurch gekennzeichnet, dass
    zusätzlich zur tragbaren Vorrichtung (1) bei einem anderen Benutzer im gleichen Gebäude (14) eine stationäre Vorrichtung (2) vorgesehen ist, die einen Referenzsensor (10) aufweist, und ein Fall durch Vergleich der Daten des Referenzsensors und des Höhendifferenzsensors (5) der tragbaren Vorrichtung angezeigt wird.
  9. Gerät nach Anspruch 8,
    dadurch gekennzeichnet, dass
    der Referenzsensor (10) ein Drucksensor (10) zur Messung von Änderungen des Umgebungsluftdrucks ist, und ein Fall angezeigt wird, wenn sich die Luftdruckmessung durch die tragbare Vorrichtung (1) ändert, und sich gleichzeitig der Umgebungsluftdruck, der von einer weiteren stationären Vorrichtung (2) gemessen wird, nicht ändert.
  10. Gerät nach Anspruch 8 oder 9,
    dadurch gekennzeichnet, dass
    die tragbare Vorrichtung (1) in Datenkommunikation mit der weiteren stationären Vorrichtung (2) steht, die den Fall auf der Grundlage von Messungen anzeigt.
  11. Gerät nach Anspruch 8 oder 9,
    dadurch gekennzeichnet, dass
    die tragbare Vorrichtung (1) mit der weiteren, stationären Vorrichtung (2) in Datenkommunikation steht, und die tragbare Vorrichtung (1) den Fall auf der Grundlage von Messungen anzeigt.
  12. Gerät nach einem der Ansprüche 1 bis 11,
    dadurch gekennzeichnet, dass
    bei der Anzeige eines Falls das Gerät (1, 2) einen Alarm sendet, der über eine Datenkommunikation (12) an das Alarmkontrollzentrum (13) oder einen Alarmempfänger übertragen wird.
  13. Gerät nach einem der Ansprüche 1 bis 12,
    dadurch gekennzeichnet, dass
    die tragbare Vorrichtung (1) einen Alarmknopf (15) hat, mittels dem der Benutzer durch Drücken selbst den Alarm auslösen kann, der zum Alarmkontrollzentrum (13) oder einem anderen Empfänger übertragen wird.
EP04742253A 2003-06-25 2004-06-24 Einrichtung zur anzeige eines falls Active EP1642248B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20035106A FI114246B (fi) 2003-06-25 2003-06-25 Laite kaatumisen ilmaisua varten
PCT/FI2004/050103 WO2004114245A1 (en) 2003-06-25 2004-06-24 A device for indicating a fall

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EP1642248A1 EP1642248A1 (de) 2006-04-05
EP1642248B1 true EP1642248B1 (de) 2007-03-28

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DE (1) DE602004005596T2 (de)
FI (1) FI114246B (de)
WO (1) WO2004114245A1 (de)

Cited By (7)

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US7893844B2 (en) * 2008-06-27 2011-02-22 Mark Gottlieb Fall detection system having a floor height threshold and a resident height detection device
US20120109575A1 (en) * 2009-07-22 2012-05-03 Koninklijke Philips Electronics N.V. Fall detectors and a method of detecting falls
CN102458248A (zh) * 2009-06-23 2012-05-16 皇家飞利浦电子股份有限公司 用于检测用户跌倒的方法和设备
CN104169680A (zh) * 2012-03-13 2014-11-26 皇家飞利浦有限公司 使用气压传感器监测设备的高度改变
CN104244821A (zh) * 2011-09-02 2014-12-24 皇家飞利浦有限公司 离床监测装置
WO2016044198A1 (en) * 2014-09-15 2016-03-24 3M Innovative Properties Company Impairment detection with environmental considerations
WO2016044199A1 (en) * 2014-09-15 2016-03-24 3M Innovative Properties Company Impairment detection with biological considerations

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WO2012146957A1 (en) * 2011-04-29 2012-11-01 Koninklijke Philips Electronics N.V. An apparatus for use in a fall detector or fall detection system, and a method of operating the same
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WO2017104646A1 (ja) * 2015-12-18 2017-06-22 株式会社リコー 情報処理システム、情報処理装置、情報処理方法、プログラム、および記録媒体
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EP3537402A1 (de) 2018-03-09 2019-09-11 Koninklijke Philips N.V. Verfahren und system zur erkennung eines falls durch einen benutzer
EP3709276A1 (de) * 2019-03-12 2020-09-16 Koninklijke Philips N.V. Verfahren zur detektion des falls eines benutzers
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Cited By (11)

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Publication number Priority date Publication date Assignee Title
US7893844B2 (en) * 2008-06-27 2011-02-22 Mark Gottlieb Fall detection system having a floor height threshold and a resident height detection device
CN102458248A (zh) * 2009-06-23 2012-05-16 皇家飞利浦电子股份有限公司 用于检测用户跌倒的方法和设备
US9119567B2 (en) 2009-06-23 2015-09-01 Koninklijke Philips N.V. Methods and apparatus for detecting a fall of user
US20120109575A1 (en) * 2009-07-22 2012-05-03 Koninklijke Philips Electronics N.V. Fall detectors and a method of detecting falls
US9974908B2 (en) * 2009-07-22 2018-05-22 Koninklijke Philips N.V. Fall detectors and a method of detecting falls
CN104244821A (zh) * 2011-09-02 2014-12-24 皇家飞利浦有限公司 离床监测装置
CN104169680A (zh) * 2012-03-13 2014-11-26 皇家飞利浦有限公司 使用气压传感器监测设备的高度改变
WO2016044198A1 (en) * 2014-09-15 2016-03-24 3M Innovative Properties Company Impairment detection with environmental considerations
WO2016044199A1 (en) * 2014-09-15 2016-03-24 3M Innovative Properties Company Impairment detection with biological considerations
AU2015318078B2 (en) * 2014-09-15 2018-08-30 Attenti Electronic Monitoring Ltd. Impairment detection with biological considerations
AU2015318077B2 (en) * 2014-09-15 2018-08-30 Attenti Electronic Monitoring Ltd. Impairment detection with environmental considerations

Also Published As

Publication number Publication date
DE602004005596D1 (de) 2007-05-10
WO2004114245A1 (en) 2004-12-29
FI114246B (fi) 2004-09-15
DE602004005596T2 (de) 2007-12-13
FI20035106A0 (fi) 2003-06-25
EP1642248A1 (de) 2006-04-05

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