WO2001078027A1 - Motion detector and method for detecting motion - Google Patents

Motion detector and method for detecting motion Download PDF

Info

Publication number
WO2001078027A1
WO2001078027A1 PCT/EP2001/004128 EP0104128W WO0178027A1 WO 2001078027 A1 WO2001078027 A1 WO 2001078027A1 EP 0104128 W EP0104128 W EP 0104128W WO 0178027 A1 WO0178027 A1 WO 0178027A1
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WO
WIPO (PCT)
Prior art keywords
motion detector
radiation
detector
motion
signal
Prior art date
Application number
PCT/EP2001/004128
Other languages
French (fr)
Inventor
Herman Paul Benjamin Chadien
Original Assignee
Ascom Tateco Ab
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 Ascom Tateco Ab filed Critical Ascom Tateco Ab
Priority to AU56276/01A priority Critical patent/AU5627601A/en
Publication of WO2001078027A1 publication Critical patent/WO2001078027A1/en

Links

Classifications

    • 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
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/1436—Mechanical actuation by lifting or attempted removal of hand-portable articles with motion detection

Definitions

  • the invention relates to a motion detector comprising a radiation detector.
  • Such a motion detector is known. It may for example be disposed in a room to be secured, wherein various parts of the room are shown on the radiation detector by means of various lenses. When a person moves inside said room, the amount of infrared radiation that falls on the radiation detector will change, as a result of which an alarm can be activated, for example.
  • One drawback of the prior art detector is that it covers a limited, fixed detection area. If it is desired to protect a specific object or a specific person with such a detector, this is only possible as long as said object or person is present within the detection area.
  • the object of the invention is to provide simple, low- cost and reliable individual protection of objects or persons, wherein the motion or standstill of objects or persons can be detected, irrespective of the location of said objects or persons.
  • the motion detector furthermore comprises a radiation interrupter which is movable under the influence of movement of the motion detector at least between a first and a second position, as a result of which the amount of radiation from a radiation source that falls on the radiation detector in the first position is different from that in the second position.
  • motion or standstill of the motion detector itself By placing the motion in or on the object or the person to be secured, motion or standstill of the motion detector itself will be detected, and thus motion or standstill of the object or the person, irrespective of the location of said object or person.
  • the radiation source forms part of the motion detector, as a result of which the motion detector can operate independently of external radiation sources .
  • the radiation source is an infrared radiation source, and preferably the radiation source is a light-emitting diode.
  • a radiation source is reliable, requires little energy, and is not affected by electrical or magnetic disturbances.
  • the radiation interrupter is spherical, so that the freedom of movement thereof is impeded as little as possible.
  • the motion detector preferably also comprises a space within which the radiation interrupter is freely movable in three dimensions .
  • the motion detector comprises a logic circuit which is capable of converting the signal from the radiation detector into a signal which indicates whether or not the motion detector is moving. Depending on the intended use, it may be important to know whether the motion detector is moving or, on the contrary, is stationary.
  • said signal is an alarm signal, for example a light signal, an acoustic signal or a radio signal.
  • the motion detector is portable, wherein the motion detector preferably comprises means for being attached to an object or to the body or the clothing of a person.
  • the dimensions of the motion detector are preferably smaller than 10 cm x 10 cm x 7 cm.
  • the alarm can be activated when the motion detector has not moved for a predetermined period of time, which is specially advantageous when persons are to be protected. In this manner it can be verified whether specific persons, for example security personnel, keep moving.
  • the invention furthermore relates to a method for detecting motion by means of a motion detector which comprises a radiation detector, wherein movement of the motion detector causes a radiation interrupter which is present in the motion detector to move between a first position and a second position, which results in a change in the amount of radiation from a radiation source that falls on the radiation detector.
  • Figure 1 is a schematic perspective view of a motion detector
  • Figure 2 shows part of an electronic diagram of the motion detector of Figure 1.
  • a motion detector comprises a housing 1 including a closed space 2, in which a metal or plastic ball 3, which functions as a radiation interrupter, is freely movable.
  • the motion detector furthermore comprises an infrared radiation detector 4 on one side of space 2, and an infrared light emitting diode (LED) 5 on the opposite side.
  • the housing 1, infrared emitter 5 and radiation detector 4 are readily available on the market as a "photo- interrupter" .
  • the motion detector can then be assembled by putting the ball 3 in the space 2, and closing the space 2 by a cover (not shown) .
  • Diode 5 is connected, with the interposition of a resistor 6, to two connecting points 7, 8, to which a battery can be connected, for example.
  • Radiation detector 4 is connected, with the interposition of a resistor 9, to a connecting point 10 on one side, and to a transistor 11, which is capable of amplifying the signal from the radiation detector 4, on the other side.
  • Transistor 11 is connected to resistor 9 and connecting point 12.
  • a logic circuit (not shown) can be connected across resistor 9, which logic circuit processes and analyses the signal from radiation detector 4 and, depending on the intended use of the motion detector, generates and alarm upon movement or standstill of the motion detector for a predetermined period of time.
  • the alarm may be an optic or acoustic alarm signal, for example, or a radio signal which can be received elsewhere.
  • the motion detector disclosed herein can be used in particular for protecting security personnel.
  • the security guard carries the motion detector on him, it is for example attached to his belt by means of a belt clip, when making his inspection round.
  • ball 3 will be in motion, so that the infrared light emitted by the diode that falls on the radiation detector 4 will be of a varying intensity.
  • the logic circuit is set so that as long as radiation detector 4 detects a varying intensity, no alarm signal will be delivered. When the security guard stands still for some reason, however, ball 3 will be at rest and radiation detector 4 will detect a constant intensity.
  • the logic circuit is set so that an alarm signal will be delivered after a predetermined period of time during which the voltage across the resistor 9 is constant .
  • the alarm signal may be a radio signal which is transmitted by a transmitter in the motion detector, and which can be detected by central security personnel .

Abstract

A motion detector comprising a radiation detector and a radiation interrupter which is movable under the influence of movement of the motion detector at least between a first and a second position, as a result of which the amount of radiation from a radiation source that falls on the radiation detector in the first position is different from that in the second position.

Description

MOTION DETECTOR AND METHOD FOR DETECTING MOTION
The invention relates to a motion detector comprising a radiation detector.
Such a motion detector is known. It may for example be disposed in a room to be secured, wherein various parts of the room are shown on the radiation detector by means of various lenses. When a person moves inside said room, the amount of infrared radiation that falls on the radiation detector will change, as a result of which an alarm can be activated, for example.
One drawback of the prior art detector is that it covers a limited, fixed detection area. If it is desired to protect a specific object or a specific person with such a detector, this is only possible as long as said object or person is present within the detection area.
The object of the invention is to provide simple, low- cost and reliable individual protection of objects or persons, wherein the motion or standstill of objects or persons can be detected, irrespective of the location of said objects or persons.
In order to accomplish that objective, the motion detector furthermore comprises a radiation interrupter which is movable under the influence of movement of the motion detector at least between a first and a second position, as a result of which the amount of radiation from a radiation source that falls on the radiation detector in the first position is different from that in the second position.
By placing the motion in or on the object or the person to be secured, motion or standstill of the motion detector itself will be detected, and thus motion or standstill of the object or the person, irrespective of the location of said object or person.
Preferably, the radiation source forms part of the motion detector, as a result of which the motion detector can operate independently of external radiation sources .
Preferably, the radiation source is an infrared radiation source, and preferably the radiation source is a light-emitting diode. Such a radiation source is reliable, requires little energy, and is not affected by electrical or magnetic disturbances.
Preferably, the radiation interrupter is spherical, so that the freedom of movement thereof is impeded as little as possible. For that purpose the motion detector preferably also comprises a space within which the radiation interrupter is freely movable in three dimensions .
Preferably, the motion detector comprises a logic circuit which is capable of converting the signal from the radiation detector into a signal which indicates whether or not the motion detector is moving. Depending on the intended use, it may be important to know whether the motion detector is moving or, on the contrary, is stationary. Preferably, said signal is an alarm signal, for example a light signal, an acoustic signal or a radio signal.
Preferably, the motion detector is portable, wherein the motion detector preferably comprises means for being attached to an object or to the body or the clothing of a person. The dimensions of the motion detector are preferably smaller than 10 cm x 10 cm x 7 cm. In one preferred embodiment the alarm can be activated when the motion detector has not moved for a predetermined period of time, which is specially advantageous when persons are to be protected. In this manner it can be verified whether specific persons, for example security personnel, keep moving.
The invention furthermore relates to a method for detecting motion by means of a motion detector which comprises a radiation detector, wherein movement of the motion detector causes a radiation interrupter which is present in the motion detector to move between a first position and a second position, which results in a change in the amount of radiation from a radiation source that falls on the radiation detector.
The invention will now be explained in more detail with reference to an embodiment which is shown in the figures, wherein:
Figure 1 is a schematic perspective view of a motion detector; and
Figure 2 shows part of an electronic diagram of the motion detector of Figure 1.
Referring to Figures 1 and 2, a motion detector comprises a housing 1 including a closed space 2, in which a metal or plastic ball 3, which functions as a radiation interrupter, is freely movable. The motion detector furthermore comprises an infrared radiation detector 4 on one side of space 2, and an infrared light emitting diode (LED) 5 on the opposite side. The housing 1, infrared emitter 5 and radiation detector 4 are readily available on the market as a "photo- interrupter" . The motion detector can then be assembled by putting the ball 3 in the space 2, and closing the space 2 by a cover (not shown) .
Diode 5 is connected, with the interposition of a resistor 6, to two connecting points 7, 8, to which a battery can be connected, for example. Radiation detector 4 is connected, with the interposition of a resistor 9, to a connecting point 10 on one side, and to a transistor 11, which is capable of amplifying the signal from the radiation detector 4, on the other side. Transistor 11 is connected to resistor 9 and connecting point 12.
A logic circuit (not shown) can be connected across resistor 9, which logic circuit processes and analyses the signal from radiation detector 4 and, depending on the intended use of the motion detector, generates and alarm upon movement or standstill of the motion detector for a predetermined period of time. The alarm may be an optic or acoustic alarm signal, for example, or a radio signal which can be received elsewhere.
The motion detector disclosed herein can be used in particular for protecting security personnel. The security guard carries the motion detector on him, it is for example attached to his belt by means of a belt clip, when making his inspection round. As long as he keeps moving, ball 3 will be in motion, so that the infrared light emitted by the diode that falls on the radiation detector 4 will be of a varying intensity.
The logic circuit is set so that as long as radiation detector 4 detects a varying intensity, no alarm signal will be delivered. When the security guard stands still for some reason, however, ball 3 will be at rest and radiation detector 4 will detect a constant intensity. The logic circuit is set so that an alarm signal will be delivered after a predetermined period of time during which the voltage across the resistor 9 is constant . In this case the alarm signal may be a radio signal which is transmitted by a transmitter in the motion detector, and which can be detected by central security personnel .

Claims

1. A motion detector comprising a radiation detector and a radiation interrupter which is movable under the influence of movement of the motion detector at least between a first and a second position, as a result of which the amount of radiation from a radiation source that falls on the radiation detector in the first position is different from that in the second position.
2. A motion detector according to claim 1, wherein the radiation source forms part of the motion detector.
3. A motion detector according to claim 1 or 2 , wherein the radiation source is an infrared radiation source.
4. A motion detector according to any one of the preceding claims, wherein the radiation source is a light emitting diode.
5. A motion detector according to any one of the preceding claims, wherein the radiation interrupter is spherical.
6. A motion detector according to any one of the preceding claims, wherein the motion detector also comprises a space within which the radiation interrupter is freely movable in three dimensions.
7. A motion detector according to any one of the preceding claims, wherein the motion detector comprises a logic circuit which is capable of converting the signal from the radiation detector into a signal which indicates whether or not the motion detector is moving.
8. A motion detector according to any one of the preceding claims, wherein said signal is an alarm signal, for example a light signal, an acoustic signal or a radio signal .
9. A motion detector according to any one of the preceding claims, wherein the motion detector is portable .
10. A motion detector according to claim 9, wherein the motion detector comprises means for being attached to an object or to the body or the clothing of a person.
11. A method for detecting motion by means of a motion detector which comprises a radiation detector, wherein movement of the motion detector causes a radiation interrupter which is present in the motion detector to move between a first position and a second position, which results in a change in the amount of radiation from a radiation source that falls on the radiation detector.
12. A method according to any one of the claims 11, wherein an alarm is activated when the motion detector is not moved for a predetermined period of time .
13. A method according to claim 11 or 12, wherein the motion detector is carried on the body of a person to be protected.
PCT/EP2001/004128 2000-04-11 2001-04-10 Motion detector and method for detecting motion WO2001078027A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU56276/01A AU5627601A (en) 2000-04-11 2001-04-10 Motion detector and method for detecting motion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1014906 2000-04-11
NL1014906A NL1014906C2 (en) 2000-04-11 2000-04-11 Motion detector and method for detecting motion.

Publications (1)

Publication Number Publication Date
WO2001078027A1 true WO2001078027A1 (en) 2001-10-18

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PCT/EP2001/004128 WO2001078027A1 (en) 2000-04-11 2001-04-10 Motion detector and method for detecting motion

Country Status (3)

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AU (1) AU5627601A (en)
NL (1) NL1014906C2 (en)
WO (1) WO2001078027A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009126338A1 (en) * 2008-04-06 2009-10-15 Sony Ericsson Mobile Communications Ab Method and apparatus for conveying location of lost or motionless mobile communication devices

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337462A (en) * 1977-12-27 1982-06-29 Lemelson Jerome H Theft detection system and method
EP0141294A2 (en) * 1983-10-21 1985-05-15 AUTOTECNICA s.r.l. Device suitable for detecting changes in the state of rest or of rectilinear uniform motion of a body
US4556799A (en) * 1980-03-31 1985-12-03 Rolando John L Motion sensing apparatus with variable threshold
US5278414A (en) * 1992-01-09 1994-01-11 Detex Corporation Optical motion and angular position sensing method and sensor
US5438320A (en) * 1993-04-09 1995-08-01 Figgie International Inc. Personal alarm system
DE19822834A1 (en) * 1997-05-24 1999-02-25 Behrens Erika Sensor, especially position or inclination sensor
US5902999A (en) * 1996-08-06 1999-05-11 Takata Corporation Acceleration sensor
US5910771A (en) * 1991-08-06 1999-06-08 North-South Corporation Integrated safety monitoring and alarm system
US5941836A (en) * 1996-06-12 1999-08-24 Friedman; Mark B. Patient position monitor
WO2000029856A1 (en) * 1998-11-16 2000-05-25 Autotecnica S.R.L. Displacement sensor in a system suitable for controlling movements and alarms

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337462A (en) * 1977-12-27 1982-06-29 Lemelson Jerome H Theft detection system and method
US4556799A (en) * 1980-03-31 1985-12-03 Rolando John L Motion sensing apparatus with variable threshold
EP0141294A2 (en) * 1983-10-21 1985-05-15 AUTOTECNICA s.r.l. Device suitable for detecting changes in the state of rest or of rectilinear uniform motion of a body
US5910771A (en) * 1991-08-06 1999-06-08 North-South Corporation Integrated safety monitoring and alarm system
US5278414A (en) * 1992-01-09 1994-01-11 Detex Corporation Optical motion and angular position sensing method and sensor
US5438320A (en) * 1993-04-09 1995-08-01 Figgie International Inc. Personal alarm system
US5941836A (en) * 1996-06-12 1999-08-24 Friedman; Mark B. Patient position monitor
US5902999A (en) * 1996-08-06 1999-05-11 Takata Corporation Acceleration sensor
DE19822834A1 (en) * 1997-05-24 1999-02-25 Behrens Erika Sensor, especially position or inclination sensor
WO2000029856A1 (en) * 1998-11-16 2000-05-25 Autotecnica S.R.L. Displacement sensor in a system suitable for controlling movements and alarms

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009126338A1 (en) * 2008-04-06 2009-10-15 Sony Ericsson Mobile Communications Ab Method and apparatus for conveying location of lost or motionless mobile communication devices
US8095150B2 (en) 2008-06-04 2012-01-10 Sony Ericsson Mobile Communications Ab Method and apparatus for conveying location of lost or motionless mobile communication devices

Also Published As

Publication number Publication date
NL1014906A1 (en) 2000-06-13
AU5627601A (en) 2001-10-23
NL1014906C2 (en) 2001-02-23

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