WO1999004272A1 - Omni-directional movement sensor - Google Patents
Omni-directional movement sensor Download PDFInfo
- Publication number
- WO1999004272A1 WO1999004272A1 PCT/AU1998/000556 AU9800556W WO9904272A1 WO 1999004272 A1 WO1999004272 A1 WO 1999004272A1 AU 9800556 W AU9800556 W AU 9800556W WO 9904272 A1 WO9904272 A1 WO 9904272A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- radiation
- chamber
- sensor according
- sensor
- emitting means
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/10—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
- B60R25/1004—Alarm systems characterised by the type of sensor, e.g. current sensing means
- B60R25/1006—Mechanical sensors, e.g. pendulums
- B60R25/1007—Mechanical sensors, e.g. pendulums comprising associated circuitry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
Definitions
- This invention relates to a movement sensor and relates particularly to a device for detecting movement or variations of movement of a body.
- Movement sensors are used in a variety of applications. In some applications, the movement sensors are designed to detect movement in a predetermined direction. In other applications, the movement sensors are designed to detect movement in more than one direction.
- the present invention is directed particularly at omni-directional movement sensors and will be described with particular reference to the use of such a sensor in a motor vehicle security and alarm system. DESCRIPTION OF THE PRIOR ART
- a mercury switch is a form of movement sensor commonly used in motor vehicle alarm systems and which operates when mercury moves from an at-rest position due either to acceleration of the switch, resulting from vehicle movement, or tilting of the switch.
- the known movement sensors suffer a number of inherent disadvantages.
- the mercury switch for example, can be set to detect acceleration and movement from a horizontal plane. However, as the switch is reliant on the gravitational effect on the mercury, the switch will not necessarily function as designed if its operating attitude is not substantially horizontal.
- Another type of movement sensor works on the pendulum principal, where movement causes a suspended magnet to swing above a "Hall Effect" device thereby generating a signal in response to detected movement.
- a restriction with this sensor is that it only works on a horizontal plane.
- Another known sensor uses a piezoelectric transducer wherein an acceleration or a sharp movement causes a piezoelectric material to generate an electrical signal. Even though this type of sensor is unaffected by its orientation, it is very susceptible to vibration but is not sensitive enough to detect small accelerations or slow variations in movement.
- United States Patent No 4,648,273 discloses a device for detecting the influence of gravitational forces on a flowable body contained within a cavity.
- the device is designed particularly for use in rocketry and space flight programming and instrumentation.
- the device is designed particularly to not only measure acceleration but to determine the state of zero gravity at which time the flowable material forms a sphere due to the surface tension of the medium.
- Japanese Patent Abstract No 59-202067 discloses a three-axial direction acceleration detecting apparatus which includes a sphere supported by springs within a hollow container. Acceleration of the container causes the sphere to move relative thereto and that movement is detected by a light source on each of the yawing, rolling and pitching axes.
- Japanese Patent Abstract No JP 6-258336 relates to an acceleration sensor which uses a liquid metal ball within a sphere. Shadows of the liquid ball are projected onto multi-element photo detectors. Acceleration causes the ball to deform in shape and the change in the shape of the shadow is measured as a function of the acceleration.
- Japanese Patent Abstract No JP 6-258337 shows a sensor in which movement is detected by sensing changes to the size of the shadow of a ball within a sphere and detecting the shadow position using a multi-element photo detector.
- a movement sensor including a chamber containing a spherical body freely movable within the chamber, radiation emitting means located relative to the chamber so that emitted radiation passes through the chamber, radiation detecting means to detect emitted radiation passing through the chamber, and signal generating means to generate a signal in response to detected radiation.
- the chamber is a spherical shape and has a relatively smooth inner surface which offers minimal resistance to movement of the spherical body within the chamber.
- the chamber may be evacuated, or partially evacuated, to further reduce resistance to movement of the body within the chamber.
- the radiation emitting means may comprise a light source or a source of infra-red or any other suitable form of radiation including ultrasound.
- the invention will be described with reference to the radiation emitting means as a source of visible light.
- the radiation detecting means preferably comprises a light detector which incorporates signal generating means so as to generate a signal proportional to the amount of detected light. Electrical circuitry is used to compare the output signal from the light detector with the input to the light source and detect any variation produced by movement of the body within the chamber which changes the amount of radiation passing through the chamber.
- the chamber wall is formed of a material through which the radiation passes.
- the chamber may be formed of a synthetic plastics material which is transparent to the radiation.
- the wall is formed of a material which is translucent to visible light but transparent to infra-red radiation.
- the chamber is provided with windows in the wall on opposite sides of the chamber which windows are transparent to the radiation.
- the radiation emitting means is located at one window and the radiation detecting means is located at the other window.
- four windows are provided in the chamber wall with two radiation detecting means and two radiation emitting means so located at the windows that the radiation beams extend across the chamber, preferably at right angles to each other.
- six windows are provided in the chamber wall equally spaced from each other.
- Three radiation emitting devices are located at three of the windows and three radiation detecting devices are located at the other windows. The emitting and detecting devices are so located that the radiation beams extend at right angles to each other.
- a movement detector having the two or more emitting and detecting means can be associated with electrical circuitry to firstly detect relative movement between the chamber and the body and secondly determine the extent and direction of acceleration of the chamber.
- the electrical circuitry receives signals from the detecting devices and compares the signals with the input to the emitting devices. The results of the comparison and then compared with each other and the circuitry is then able to determine whether or not there has been any change from an existing state and, if so, the rate and direction of change.
- the detector of the invention is therefore able to provide precise determination and calculation of movement of the body relative to the chamber.
- FIG. 1 is a top view of a movement detector in accordance with an embodiment
- the movement detector of this embodiment comprises a hollow, spherical chamber 12 containing a spherical ball 14.
- the chamber 12 which may be formed of any suitable material such as metal or synthetic plastics material, may be evacuated or partly evacuated.
- the spherical ball may also be formed of any suitable material including metal, synthetic plastics material, wood or any other relatively rigid material which is able to block radiation emitted from a radiation emitter.
- a radiation emitter 16 which, in this embodiment, is a light source, is located on one side of the chamber 12 and a second emitter 19 is located at 90° to the emitter 16.
- the chamber wall is provided with windows 15 which are transparent to the emitted radiation, i.e. visible light, so that the radiation beams 21 and 22, which are preferably parallel beams, can pass through the chamber 12.
- the ball 14 When the chamber 12 is at rest, or is moving horizontally with uniform velocity in a normal gravitational field, the ball 14 will remain in the position shown in Fig. 1. In that "at-rest" position, the ball 14 blocks all the light emitted by the emitter 19 so that the detector 17 will not receive any light. The ball will also block a proportion of the light emitted by the emitter 16 so that the detector 18 will detect only a portion of the total light emitted.
- the ball 14 moves within the chamber.
- the amount of relative movement between the ball 14 and the chamber 12 depends on the acceleration of the chamber 12 and the inertia of the ball 14.
- the direction of the acceleration of the chamber 12 will also determined in which direction the ball moves relative to the chamber.
- Such relative movement of the ball 14 and chamber 12 will cause a variation in the amount of light blocked by the ball 14 and, therefore, in the amount of light received by the two detectors 17 and 18. If the ball 14, for example, moves to the left as viewed in Fig. 1 , the amount of light received by the detector 18 will be reduced, as the ball moves relatively upwardly across the light beam 21, while the amount of light received by the detector 17 will increase as the light beam 22 becomes exposed.
- a third light emitter 20 and a third detector 25 may be provided to improve detection and measurement in three dimensions of acceleration of the chamber as determined by movement of the ball 14. With three emitters and detectors, the acceleration of the ball 14 within the chamber 12 is more easily calculated and the relative location of the ball 14 may be determined by simple calculation.
- the outputs from the detectors 17 and 18 and 25 are received at a comparator 23 which compares the respective outputs with the inputs as determined by the input circuit 24 in relation to the emitters 16, 19 and 20 (if present).
- a calculator 26 is able to determine the relative position of the ball 14 by the compared results and is also able to determine a direction of relative movement of the ball 14 by timed comparisons to thereby signal an alarm circuit 28, or any other output circuit, when predetermined thresholds have been reached or exceeded.
- the chamber may be of other shapes, such as ellipsoidal or non-regular shapes.
- the wall of the chamber may be of a material through which the radiation passes thus obviating the need for radiation transparent windows.
- a translucent synthetic plastics material may be used for the chamber wall and which allows the transmission of infra-red radiation.
- the radiation emitted from the emitters may be of different frequencies, or have other characteristics whereby the specific radiation from each emitter can be identified.
- the surface of the ball 14 may be formed of a material or in such a manner as to prevent or minimize reflection of emitted radiation.
- the internal surface of the wall of the chamber 12 may also be formed of a material or in a manner so as to minimize or prevent reflection of radiation which impinges thereon.
- the movement sensor of the invention may be used for any movement detecting purpose, such as in an alarm system for a motor vehicle, such as an automobile or motorbike.
- the sensor of the invention is particularly suitable for vehicle movement detectors as the security system can be actuated with the vehicle in any orientation relative to the horizontal and, on actuation, the system will sense the relative position of the ball 14 within the chamber 12 at the time of actuation. This will be the "at-rest" position of the ball 14. Any subsequent movement of the chamber which causes relative movement of the ball therein will then be detected by the variation in detected radiation at the two detectors 17 and 18.
- a movement sensor in accordance with the invention may be constructed using a single pair of emitter and detector.
- An alarm system operated by a movement detector of the invention may be calibrated to allow for varying degrees of sensitivity to take account of vibrations and the like which might otherwise cause relatively minor acceleration of the ball 14 within the chamber 12.
- Any form of radiation may be used in the performance of the invention, including microwave radiation and the like.
- the electrical circuitry associated with the detector of the invention may also compute the angle, direction or distance travelled by a chamber 12 by determining the acceleration of the chamber over a given period of time.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/462,721 US6377166B1 (en) | 1997-07-17 | 1998-07-15 | Omni-directional movement sensor |
JP2000503430A JP2001510897A (en) | 1997-07-17 | 1998-07-15 | Omnidirectional motion sensor |
GB0000532A GB2342163B (en) | 1997-07-17 | 1998-07-15 | Omni-directional movement sensor |
AU83244/98A AU733879B2 (en) | 1997-07-17 | 1998-07-15 | Omni-directional movement sensor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPO8091A AUPO809197A0 (en) | 1997-07-17 | 1997-07-17 | Omni-directional movement sensor |
AUPO8091 | 1997-07-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999004272A1 true WO1999004272A1 (en) | 1999-01-28 |
Family
ID=3802381
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1998/000556 WO1999004272A1 (en) | 1997-07-17 | 1998-07-15 | Omni-directional movement sensor |
Country Status (5)
Country | Link |
---|---|
US (1) | US6377166B1 (en) |
JP (1) | JP2001510897A (en) |
AU (1) | AUPO809197A0 (en) |
GB (1) | GB2342163B (en) |
WO (1) | WO1999004272A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105150872A (en) * | 2015-09-15 | 2015-12-16 | 福州市智聚物联科技有限公司 | Pure electric vehicle system capable of improving vehicle traffic safety |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2808108B1 (en) * | 2000-04-25 | 2003-09-12 | Gerard Dumoutier | ELECTRONIC TILT DETECTOR AND DEVICE COMPRISING SUCH A DETECTOR FOR GENERATING AN ALARM ACCORDING TO THE TILT OF THE BODY OR OF A PART OF THE BODY OF AN INDIVIDUAL |
EP1359475A1 (en) * | 2000-12-20 | 2003-11-05 | Seiko Instruments Inc. | Mechanical timepiece with posture detector and the posture detector |
US7061390B2 (en) * | 2001-03-27 | 2006-06-13 | Masami Murata | Movement detection sensor and movement detection device |
US6981787B2 (en) * | 2001-12-18 | 2006-01-03 | Visteon Global Technologies, Inc. | Electric control for automobile headlights |
EP1589508A3 (en) * | 2004-04-22 | 2007-11-07 | D.E.H. L.L.C. | Sound emitting device for maintaining correct posture or avoiding the effects of drowsiness |
US7325322B2 (en) * | 2005-02-01 | 2008-02-05 | Delphi Technologies, Inc. | Electric park brake inclinometer |
TWM322538U (en) * | 2007-06-07 | 2007-11-21 | Taiwan Misaki Electronics Co L | Tilt and inclination sensor |
US8416094B2 (en) * | 2010-08-26 | 2013-04-09 | Dei Headquarters, Inc. | Circuit board integrated motion sensor |
CN105109405B (en) * | 2015-09-15 | 2016-03-09 | 福州市智聚物联科技有限公司 | A kind of new forms of energy truck system improving running safety |
CN105059132B (en) * | 2015-09-15 | 2016-03-02 | 福州市智聚物联科技有限公司 | A kind of pure Electric power car based on Internet of Things |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5608209A (en) * | 1993-12-27 | 1997-03-04 | Toyo Sangyo Co., Ltd. | Method and apparatus for measuring motion amount of a laboratory animal |
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US4648273A (en) * | 1977-04-22 | 1987-03-10 | Ozols Karlis V | Force responsive device |
JPS59202067A (en) * | 1983-05-02 | 1984-11-15 | Mitsubishi Electric Corp | Acceleration detecting apparatus |
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JPS60258336A (en) * | 1984-05-31 | 1985-12-20 | Kayaba Ind Co Ltd | Joining circuit for construction vehicle |
JPS60258337A (en) * | 1984-06-01 | 1985-12-20 | 株式会社日立製作所 | Water feeder for water stopcock |
US4866850A (en) * | 1987-01-23 | 1989-09-19 | Kelly Vincent M | Clinometer with rolling liquid conductor |
JPH01184466A (en) * | 1988-01-18 | 1989-07-24 | Sumitomo Electric Ind Ltd | On-vehicle acceleration sensor |
US4952908A (en) * | 1988-06-20 | 1990-08-28 | Navistar International Transportation Corp. | Trailer stability monitor |
EP0423394B1 (en) * | 1989-10-20 | 1993-06-09 | Siemens-Elema AB | Inductive movement sensor |
DE9106217U1 (en) * | 1991-05-21 | 1991-09-26 | Nokia Unterhaltungselektronik (Deutschland) Gmbh, 7530 Pforzheim, De | |
JP3168067B2 (en) * | 1992-06-03 | 2001-05-21 | 株式会社シーエックスアール | Omnidirectional sensor |
EP0628456A3 (en) * | 1993-05-28 | 1995-03-15 | Code Alarm | Vehicle security system. |
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US6043734A (en) * | 1998-10-14 | 2000-03-28 | Code Alarm, Inc. | Optical shock sensor |
-
1997
- 1997-07-17 AU AUPO8091A patent/AUPO809197A0/en not_active Abandoned
-
1998
- 1998-07-15 JP JP2000503430A patent/JP2001510897A/en active Pending
- 1998-07-15 GB GB0000532A patent/GB2342163B/en not_active Expired - Lifetime
- 1998-07-15 US US09/462,721 patent/US6377166B1/en not_active Expired - Fee Related
- 1998-07-15 WO PCT/AU1998/000556 patent/WO1999004272A1/en active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US5608209A (en) * | 1993-12-27 | 1997-03-04 | Toyo Sangyo Co., Ltd. | Method and apparatus for measuring motion amount of a laboratory animal |
Non-Patent Citations (4)
Title |
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PATENT ABSTRACTS OF JAPAN, (P-1712), page 68; & JP,A,05 333 043 (CXR K.K.) 17 December 1993. * |
PATENT ABSTRACTS OF JAPAN, (P-344), page 111; & JP,A,59 202 067 (MITSUBISHI DENKI KK) 15 November 1984. * |
PATENT ABSTRACTS OF JAPAN, (P-948), page 123; & JP,A,01 184 466 (SUMITOMO ELECTRIC IND. LTD.) 24 July 1989. * |
PATENT ABSTRACTS OF JAPAN; & JP,A,06 258 336 (NIPPON TELEGRAPH & TELEPH) 16 September 1994. * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105150872A (en) * | 2015-09-15 | 2015-12-16 | 福州市智聚物联科技有限公司 | Pure electric vehicle system capable of improving vehicle traffic safety |
Also Published As
Publication number | Publication date |
---|---|
GB2342163B (en) | 2002-02-20 |
JP2001510897A (en) | 2001-08-07 |
GB2342163A (en) | 2000-04-05 |
AUPO809197A0 (en) | 1997-08-14 |
GB0000532D0 (en) | 2000-03-01 |
US6377166B1 (en) | 2002-04-23 |
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