WO1994006104A1 - An electro-magnetic security/surveillance equipment - Google Patents
An electro-magnetic security/surveillance equipment Download PDFInfo
- Publication number
- WO1994006104A1 WO1994006104A1 PCT/DK1992/000253 DK9200253W WO9406104A1 WO 1994006104 A1 WO1994006104 A1 WO 1994006104A1 DK 9200253 W DK9200253 W DK 9200253W WO 9406104 A1 WO9406104 A1 WO 9406104A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- security device
- aforesaid
- field
- equipment
- security
- Prior art date
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
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/023—Power management, e.g. system sleep and wake up provisions
-
- 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
- G08B13/1427—Mechanical actuation by lifting or attempted removal of hand-portable articles with transmitter-receiver for distance detection
-
- 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
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0241—Data exchange details, e.g. data protocol
- G08B21/0247—System arrangements wherein the alarm criteria uses signal strength
-
- 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
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0286—Tampering or removal detection of the child unit from child or article
Definitions
- the invention relates to an electromagnetic equipment for secur- ing/surveilling objects including the prevention of unauthorised removal or theft of displayed or stored merchandise e.g. in a shop or warehouse.
- the equipment comprises a device to be releasably attached to an object said device having transmitting means, if a removal of said device from said object is attempted the device emits a signal which may be registered by detection means.
- a known equipment for said purpose is described in WO 9009648.
- a releasably attached device emits a radio frequency signal if removed from the object to which it is attached.
- the emitted signal is detected by a receiver said receiver causing an alarm.
- Said de ⁇ vice may further comprise a rebroadcast antenna and thus function as the traditional "tag"-systems on which the above mentioned patent is based.
- Said device does not comprise receiving means.
- Said device is primarily supplied from a battery.
- At least one security device being releasably attached to the secured object is situated within at least one secured area said area being encir- cled and defined by at least one transmitting means generating a field said field may be continuous or not be continuous.
- a continuous field is herein regarded as a not modulated field, likewise a not continuous field may herein be a modulated field).
- Said security device is equipped with at least one transmitting means and at least one receiving/detecting means.
- the security device When the security device is removed from said area, at the boundaries of which the field strength is significantly changed, said change in field strength is registered by the receiving/detecting means of the security device causing the transmitting means of said security device to emit a signal, alternatively to cease emitting a signal. Likewise the security device may emit a signal, alternatively cease emitting a signal, if the attachment means is tampered with during an attempt to remove the security device from the secured object.
- Said signal is detected by detect ⁇ ing means thus making it possible to register the status of said security device and to establish a desired reaction e.g. an alarm.
- a capacitor or other EMF accumulating means may be charged and/or sus ⁇ tained via rectifying means from the receiving means of the security de ⁇ vice.
- the secured objects can not be moved beyond the boundary of at least one sharply defined area without causing a reaction.
- the secured objects may freely be moved, handled, tried out, and inspected inside said area; contrary to devices of the known technology, the boundaries of which, due to the nature of the equip ⁇ ment, are indefinable and to a certain extend based on random local condi ⁇ tions.
- the system is highly insensitive to local conditions causing reflection, screening or phasing of the emitted signal. If the security device is wilfully screened e.g. by wrapping it in alu ⁇ minium foil this will cause an alarm; contrary to devices of the known technology in which such an action will inhibit an alarm, both from the enclosed transmitter and an additional rebroadcast antenna.
- the security device is supplied from an internal EMF store instead of a battery the device is maintenance free with regard to battery change.
- both the mobile security device and the stationary control system may be equipped with transmitters and receivers makes a very "tight" relation possible, giving raise to advantages with regard to con ⁇ trol, communication and operation including operation by means of e.g. pocket-sized remote controls.
- EDB processor control in said systems makes controlled cover ⁇ age of e.g. large buildings with several floors possible, the individual secured objects may be tracked, and by assigning codes (that may be iden ⁇ tical to the objects "bar-codes") to the individual security devices a high degree of invoice- storage- and identity-control may be obtained.
- said effects are obtained by at least one ad ⁇ ditional transmitting means encircling the area in which aforesaid releas- ably attached security device is located and emitting a field in a defined area said field being detected by a receiver in said security device in a way that said security device emi ts a signal upon removal from said de ⁇ fined area due to the reduced strength of the field from said additional transmitting means; the signal being emitted from said security device is detected by detecting means said detecting means causing a reaction e.g. an alarm.
- aforesaid security device ceases to emit a sig ⁇ nal if removed from aforesaid defined area.
- Said emitted signal may be pe ⁇ riodic and contain a code which may be specific to the individual security device.
- the system may employ a polling protocol so that the individual se ⁇ curity devices may be addressed one by one and thus verify their presence, if they are still within the defined area, if a security device is moved outside the defined area said security device ceases to emi t its identifi ⁇ cation which is detected by detecting means said detecting means causing a reaction e.g. an alarm.
- aforesaid additional transmitting means encir ⁇ cling and defining the secured area, emits a continuous field (A continu ⁇ ous field is herein regarded as a not modulated field).
- a continu ⁇ ous field is herein regarded as a not modulated field.
- aforesaid additional transmitting means and the supplementing receiving/detecting means and aforesaid security device utilises primarily the magnetic component or primarily the electric compo ⁇ nent or both said components of the emitted fields.
- the equipment may be adapted to environments and applications call ⁇ ing for said arrangements.
- aforesaid security device is supplied with en ⁇ ergy from a capacitor or other EMF accumulating means, sustained and/or charged via "pick-up"/antenna means and rectifying means, contained in said security device, by means of the field generated by aforesaid addi ⁇ tional transmitting means.
- aforesaid security device comprises means which deactivates circuits not in use as long as said security device is within a field strength larger than that required to activate its transmitting means; above said means activating the formerly deactivated circuits as the field strength approaches the value necessary to activate the trans ⁇ mitting means of said security device.
- each of aforesaid security devices and/or each of aforesaid transmitting/receiving/detecting means comprises at least one LSI (Large Scale Integrated) circuit and/or at least one micro-processor, both of which may be a standard circuit or may be realised for the appli ⁇ cation.
- LSI Large Scale Integrated
- At least one of aforesaid security devices is contained within at least one of aforesaid areas, encircled and defined by aforesaid additional transmitting means, said area/areas being monitored by at least one receiving/detecting means thus making it possible to reg ⁇ ister the status of said security device and to establish a desired reac ⁇ tion e.g. an alarm.
- the above mentioned receiving/detecting means is combined with aforesaid additional transmitting means in a way that the "pick-up"/antenna means of said receiving/detecting means is a physical part of the radiating/antenna means of aforesaid additional transmitting means, whether said "pick-up"/antenna means and said radiating/antenna means are electrically isolated or utilises at least one common electrical conductor.
- the transmitting/receiving/detecting means are simplified and a number of areas, each being secured by its individual additional transmit- ting means, may be served by at least one receiving/detecting means com ⁇ bined with at least one additional transmitting means in a way that fur ⁇ ther secured areas may be established in a hierarchical order if so de ⁇ sired.
- radiating/"pick-up"/antenna means are loops/coils having at least one turn, whether said loops/coils are electrically or magnetically screened or not or whether they are tuned or not.
- radiating/"pick-up"/antenna means are field-plates/grids, whether they are tuned or not.
- the equipment may be adapted to environments and applications call- ing for said arrangements.
- Fig. 1 Shows the secured area represented by a transmitting device (1, 3) together with the associated receiving/detecting device (4, 5, 6, 1, (12)) and a security device (7) inside said area.
- Fig. 2 Shows, by way of example, three secured areas represented by transmitting devices (1, 3) containing security devices (7). The three se ⁇ cured areas are served, by way of example, by one receiving/detecting de ⁇ vice (4, 5, 6, 11, (12)).
- Fig. 3 Shows, by way of example, three secured areas represented by transmitting devices (1, 3) containing security devices (7). The three se ⁇ cured areas are served by a receiving/detecting device (4, 5, 6, 11, (12)) combined with an additional transmitting device (la, 3a) containing fur ⁇ ther security devices (7).
- the equipment in Fig. 1-3 comprises: transmitting means (1, 3 & la, 3a), receiving/detecting means (4, 5, 1, 11 and/or 12), indicating/alarm means (6) and a plurality of security devices (7).
- At least one radiating/antenna device (1, la) being a loop, utilising the magnetic component or the electric component or both said components of the emitted field, encircle and defines an area said area being the se ⁇ cured/surveyed area.
- the radiating/antenna device is connected, e.g. via a transmit/receive filter (2), to a transmitter (3, 3a) generating a continuous or a not con ⁇ tinuous output in a suitable band, e.g.
- Said in ⁇ dicating/alarm device (6) may comprise data in/out means, e.g. for regis- tration, control and statistics, being utilised either locally or to/from a remote location.
- a plurality of security devices (7) is found within the boundaries of aforesaid secured area/areas (1, la), each comprising at least one trans ⁇ mitting device and at least one receiving/detecting device (8, 9).
- the security devices may be releasably attached to the secured/surveilled objects by attachment means (10).
- aforesaid security devices (7) are removed from a secured area or if the attachment means (10) are tampered with said security devices emits (9b) e.g. a coded signal (9c), alternatively ceases to emit a signal, by means of one or more coils/loops (8) or other radiating means.
- Said signal is generated by means of energy stored in the security devices in either a battery, or in a capacitor or other EMF accumulating means sustained and/or charged via "pick-up"/antenna means (8) and rectify- ing/limiting means (9a) from the field of aforesaid transmitting means (1, 3 & la, 3a) encircling and defining the secured area.
- Said signal, generated by the security device (7), or the lack of said signal, is detected by receiving/detecting means (4, 5) utilising either the radiating/antenna device (1, la) and or a separate "pick-up"/antenna device (11 and/or 12), making it possible to register the state of said security device and thus establish a desired reaction e.g. an alarm.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU25064/92A AU2506492A (en) | 1992-08-28 | 1992-08-28 | An electro-magnetic security/surveillance equipment |
PCT/DK1992/000253 WO1994006104A1 (en) | 1992-08-28 | 1992-08-28 | An electro-magnetic security/surveillance equipment |
EP92919084A EP0657054A1 (en) | 1992-08-28 | 1992-08-28 | An electro-magnetic security/surveillance equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DK1992/000253 WO1994006104A1 (en) | 1992-08-28 | 1992-08-28 | An electro-magnetic security/surveillance equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994006104A1 true WO1994006104A1 (en) | 1994-03-17 |
Family
ID=8153969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK1992/000253 WO1994006104A1 (en) | 1992-08-28 | 1992-08-28 | An electro-magnetic security/surveillance equipment |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0657054A1 (en) |
AU (1) | AU2506492A (en) |
WO (1) | WO1994006104A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1687747A2 (en) * | 2003-10-29 | 2006-08-09 | Smiths Detection- Pasadena, Inc. | Chemical and biological agent sensor array |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2182183A (en) * | 1985-10-26 | 1987-05-07 | Robert Peter Andow | Child vicinity radio alarm system |
US4675656A (en) * | 1984-03-16 | 1987-06-23 | Narcisse Bernadine O | Out-of-range personnel monitor and alarm |
US4724427A (en) * | 1986-07-18 | 1988-02-09 | B. I. Incorporated | Transponder device |
GB2205426A (en) * | 1987-06-03 | 1988-12-07 | Magry Systems | Shoplifting preventing device |
WO1990009648A1 (en) * | 1989-02-09 | 1990-08-23 | Israel, Marcia | Merchandise security system utilizing rf transmitter |
WO1991013416A1 (en) * | 1990-02-21 | 1991-09-05 | Marcia Israel | Improved electronic anti-theft merchandise tag |
-
1992
- 1992-08-28 WO PCT/DK1992/000253 patent/WO1994006104A1/en not_active Application Discontinuation
- 1992-08-28 AU AU25064/92A patent/AU2506492A/en not_active Abandoned
- 1992-08-28 EP EP92919084A patent/EP0657054A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4675656A (en) * | 1984-03-16 | 1987-06-23 | Narcisse Bernadine O | Out-of-range personnel monitor and alarm |
GB2182183A (en) * | 1985-10-26 | 1987-05-07 | Robert Peter Andow | Child vicinity radio alarm system |
US4724427A (en) * | 1986-07-18 | 1988-02-09 | B. I. Incorporated | Transponder device |
GB2205426A (en) * | 1987-06-03 | 1988-12-07 | Magry Systems | Shoplifting preventing device |
WO1990009648A1 (en) * | 1989-02-09 | 1990-08-23 | Israel, Marcia | Merchandise security system utilizing rf transmitter |
WO1991013416A1 (en) * | 1990-02-21 | 1991-09-05 | Marcia Israel | Improved electronic anti-theft merchandise tag |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1687747A2 (en) * | 2003-10-29 | 2006-08-09 | Smiths Detection- Pasadena, Inc. | Chemical and biological agent sensor array |
EP1687747A4 (en) * | 2003-10-29 | 2007-02-21 | Smiths Detection Pasadena Inc | Chemical and biological agent sensor array |
Also Published As
Publication number | Publication date |
---|---|
AU2506492A (en) | 1994-03-29 |
EP0657054A1 (en) | 1995-06-14 |
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