WO1980000386A1 - System for the registration of the passage of articles through a previously determined field - Google Patents
System for the registration of the passage of articles through a previously determined field Download PDFInfo
- Publication number
- WO1980000386A1 WO1980000386A1 PCT/DK1979/000023 DK7900023W WO8000386A1 WO 1980000386 A1 WO1980000386 A1 WO 1980000386A1 DK 7900023 W DK7900023 W DK 7900023W WO 8000386 A1 WO8000386 A1 WO 8000386A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- marker
- transmitter
- passage
- articles
- signals
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
- G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/04—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction
- C10G1/045—Separation of insoluble materials
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
- G08B13/2468—Antenna in system and the related signal processing
- G08B13/2471—Antenna signal processing by receiver or emitter
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
- G08B13/2468—Antenna in system and the related signal processing
- G08B13/2474—Antenna or antenna activator geometry, arrangement or layout
Definitions
- the invention relates to a system for the registration of the passage of articles through a priorly determined field of the kind that comprises a transmitter and a receiver with a common aerial for alternately transmittance and receiving as well as a marker fastened to the articles for receiving and transmittance of signals by the passage of a transmitter- and receiver bracket or -brackets.
- a system which comprises a common aerial for the transmitter and the receiver as well as a marker, which consists of a tuned circuit.
- the transmitter transmits during each trans ⁇ mittance period a continuous, cyclically alternating fre ⁇ quency, and the registration of the marker passage takes place according to the grid-dip meter principle, as the resonant frequency of the marker is preferably in the middle of the frequency field of the transmitter.
- This system is rather complicated and vulnerable, because any energy absorb- tion will result in alarm.
- the aerial is also complicated, because it composed of three coils, which are placed round the passage that is to be controlled, and in such a way that they are at three planes, which are at right angles to each other.
- the purpose of the invention is to provide a system for the registration of unauthorized taking of articles and the like, which system is simply built up by few components and consequently cheap, which is easily set up by non-experts which is insensitive to electromagnetic distant fields a energy absorbing articles, and which is reliable so that false alarm can be excluded.
- This purpose is fulfilled b the fact that the transmittance and receiving function changes at a suitably high frequency, that the transmitt signals have a constant frequency during the complete transmittance period, that an analytical circuit monitor the number of received signals from the marker, and com ⁇ pares the frequency of these to that of the signals whic are transmitted by the transmitter, and that the marker consists of a tuned circuit, i.e. of an inductive and a capacitive component.
- the system can be charact zed in that the transmitter- and receiver aerial is shap like a figure eight or a double loop.
- Fig. 1 shows the system according to the invention in the shape of a block diagram
- Fig. 2 shows a way of use of the system accord ⁇ ing to the invention perspectively and schematically
- Fig. 3 shows another way of use with information of the construction of the aerial
- Fig. 4 shows a third way of use of the system according to the invention.
- Fig. 1 is shown how an aerial 1 is connected partly to a transmitter 2 and partly to a receiver 3, 4 through a switch 5.
- This switch is controlled by a synchronizing unit 6 with a suitably high frequency.
- a synchronizing unit 6 By transmitting a brief signal from the transmitter 2 with a suitable frequency an alternating current is induced in the LC-circuit of a marker 18, if this marker is in the rather limited elec- tromagnetic field that is made by the transmitter aerial 1.
- this signal transmittance stops i.e. when the aerial 1 is connected to the receiver 3, 4 by means of the switch 5
- the LC-circuit of the marker sends out a signal with the same frequency, until the oscillation in the LC- circuit dies out.
- This signal is received by the aerial 1 so that the signal is sent off via the receiver 3, ⁇ to a signal processing circuit 7.
- This circuit 7 receives at the same time impulses from the synchronizing circuit 6, so that it is able to count, how many signals are received from a marker in an uninterrupted succession. This can be achieved by zeroing the counter if no signal is received during the receiving period immediately after a transmitting periode. It has appeared that a claim for e.g. 100 received signals from a marker in an uninterrupted succession satis- factorily secures that it is a marker passage and not any electrical noise.
- the signal processing circuit 7 also moni ⁇ tors, whether the received signals have the same frequency
- O PI IPO as the signals which have been sent ' out. by the transmitte 2. This secures furthermore from false alarm. If the alar is to be given, i.e. if 100 signals have been, received in an uninterrupted succession with a correct frequency the signal processing circuit 7 sends an larm signal to an auditory or a visual alarm system.
- Fig. 2 is shown how several aerials 8 can. be placed in a way that a broad passage can be controlled.
- the system is built-in in a frame stand.
- the aerial that is shaped l figure eight is placed in the frame parts 9,. 10, 11, 12, 13, 14, 15, and l6, ⁇ whereas the transmitter 2, the receiv er 3, , and the monitoring ' unit 7 are built-in in a box 17.
- Fig. 3 the system is extended by an extra aerial.
- One aerial 19 is here placed in a door, the other aerial bein placed in the floor by the door opening.
- the marker l ⁇ being registered with what ever orientation it may have contrary to the placing in Figs. 2 and 4, where the marker may pass freely if it is oriented at right angles to the aerial as well as the flo
- the construction according to the invention can be ' used whereever you want to control the taking of articles.
Abstract
In a system for the registration of the passage of articles through a previously determined field the transmitter (2) and the receiver (3, 4) are connected to a common aerial (1). A marker (18) on the articles receives and transmits electro-magnetic signals by the passage of a transmitter-and receiver bracket. In order to achieve the greatest possible security from incorrect registration the transmittance-and receiving function changes at a suitably high frequency, and an analytical circuit (7) monitors the number of received signals from the marker (18), and compares the frequency of these to that of the signals which are transmitted by the transmitter (2). The marker (18) consists of an inductive and a capacitive component, and the aerial (1) is shaped like a figure eight.
Description
SYSTEM FOR THE REGISTRATION OF THE PASSAGE OF ARTICLES THROUGH A PREVIOUSLY DETERMINED FIELD
The invention relates to a system for the registration of the passage of articles through a priorly determined field of the kind that comprises a transmitter and a receiver with a common aerial for alternately transmittance and receiving as well as a marker fastened to the articles for receiving and transmittance of signals by the passage of a transmitter- and receiver bracket or -brackets.
Systems of the kind that is mentioned in the introduction are already known. They are, however, all complicated and expensive, sensitive to electric noise, which leads to false alarm, and they are difficult to set up, as experts are required to secure that the function is reliable enough.
Prom the specification to US Patent No. 3.500.373 a system is known which comprises a common aerial for the transmitter and the receiver as well as a marker, which consists of a tuned circuit. The transmitter transmits during each trans¬ mittance period a continuous, cyclically alternating fre¬ quency, and the registration of the marker passage takes place according to the grid-dip meter principle, as the resonant frequency of the marker is preferably in the middle of the frequency field of the transmitter. This system is rather complicated and vulnerable, because any energy absorb- tion will result in alarm. The aerial is also complicated, because it composed of three coils, which are placed round the passage that is to be controlled, and in such a way that they are at three planes, which are at right angles to each other.
The purpose of the invention is to provide a system for the registration of unauthorized taking of articles and the like, which system is simply built up by few components and consequently cheap, which is easily set up by non-experts
which is insensitive to electromagnetic distant fields a energy absorbing articles, and which is reliable so that false alarm can be excluded. This purpose is fulfilled b the fact that the transmittance and receiving function changes at a suitably high frequency, that the transmitt signals have a constant frequency during the complete transmittance period, that an analytical circuit monitor the number of received signals from the marker, and com¬ pares the frequency of these to that of the signals whic are transmitted by the transmitter, and that the marker consists of a tuned circuit, i.e. of an inductive and a capacitive component.
By means of this a quite unknown security against false is achieved. This claim, which must be fulfilled out of consideration for customers or visitors to shops or muse is not fulfilled by the known systems. This security is achieved by the fact that the analytical circuit firstly tors, whether a received signal has the same frequency a the signal that has just been transmitted, and secondly ther such a signal with the right frequency is received earlier fixed and large amount of times in an uninterrup ed succession.
Finally, according to claim 2, the system can be charact zed in that the transmitter- and receiver aerial is shap like a figure eight or a double loop.
By this you primarily achieve that distant fields can no be registered by the system, and secondly that the trans¬ mitted electromagnetic field gets a ring-shaped extensio which causes that the marker during the passage of the e tromagnetic field only at a certain orientation has a fl that is zero. This means that the risk for passage witho registration is very limited.
The invention will be further explained referring to the drawing, where
Fig. 1 shows the system according to the invention in the shape of a block diagram Fig. 2 shows a way of use of the system accord¬ ing to the invention perspectively and schematically, Fig. 3 shows another way of use with information of the construction of the aerial, and Fig. 4 shows a third way of use of the system according to the invention.
In Fig. 1 is shown how an aerial 1 is connected partly to a transmitter 2 and partly to a receiver 3, 4 through a switch 5. This switch is controlled by a synchronizing unit 6 with a suitably high frequency. By transmitting a brief signal from the transmitter 2 with a suitable frequency an alternating current is induced in the LC-circuit of a marker 18, if this marker is in the rather limited elec- tromagnetic field that is made by the transmitter aerial 1. When this signal transmittance stops, i.e. when the aerial 1 is connected to the receiver 3, 4 by means of the switch 5, the LC-circuit of the marker sends out a signal with the same frequency, until the oscillation in the LC- circuit dies out. This signal is received by the aerial 1 so that the signal is sent off via the receiver 3, ^ to a signal processing circuit 7. This circuit 7 receives at the same time impulses from the synchronizing circuit 6, so that it is able to count, how many signals are received from a marker in an uninterrupted succession. This can be achieved by zeroing the counter if no signal is received during the receiving period immediately after a transmitting periode. It has appeared that a claim for e.g. 100 received signals from a marker in an uninterrupted succession satis- factorily secures that it is a marker passage and not any electrical noise. The signal processing circuit 7 also moni¬ tors, whether the received signals have the same frequency
O PI IPO
as the signals which have been sent 'out. by the transmitte 2. This secures furthermore from false alarm. If the alar is to be given, i.e. if 100 signals have been, received in an uninterrupted succession with a correct frequency the signal processing circuit 7 sends an larm signal to an auditory or a visual alarm system.
In Fig. 2 is shown how several aerials 8 can. be placed in a way that a broad passage can be controlled. The system is built-in in a frame stand. The aerial that is shaped l figure eight is placed in the frame parts 9,. 10, 11, 12, 13, 14, 15, and l6, ■ whereas the transmitter 2, the receiv er 3, , and the monitoring 'unit 7 are built-in in a box 17.
In Fig. 3 the system is extended by an extra aerial. One aerial 19 is here placed in a door, the other aerial bein placed in the floor by the door opening. As the two aeria are at right angles to each other the door passage is com pletely secured, the marker lδ being registered with what ever orientation it may have contrary to the placing in Figs. 2 and 4, where the marker may pass freely if it is oriented at right angles to the aerial as well as the flo
Finally a placing of the system is shown i Fig." 4 by a cash register in a shop.
The construction according to the invention can be' used whereever you want to control the taking of articles. Thus you may use the system e.g. in libraries, as the marker can be fastened or placed invisibly in shape of thin films in the cover of the books.
- O
Claims
1. System for the registration of the passage of articles through a priorly determined field of the kind that com- prises a transmitter and a receiver with a common aerial for alternately transmittance and receiving as well as a marker fastened to the articles for receiving and trans¬ mittance of signals by the passage of a transmitter- and receiver-bracket or -brackets, c h a r a c t e r i z e d i n that the transmittance and receiving function changes at a suitably high frequency, that the transmitted signals have a constant frequency during the -complete transmittance period, that an analytical circuit (7) monitors the number of received signals from the marker (18), and compares the frequency of these to that of the signals which are trans¬ mitted by the transmitter (2), and that the marker (l8) consists of a tuned circuit, i.e. of an inductive and a capacitive component.
2. System according to claim 1, c h a r a c t e r i z e d i n that the transmitter- and receiver aerial (1) is shaped like a figure eight or a double loop.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE792953405T DE2953405T1 (en) | 1978-08-09 | 1979-08-09 | SYSTEM FOR THE REGISTRATION OF THE PASSAGE OF ARTICLES THROUGH A PREVIOUSLY DETERMINED FIELD |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK3511/78 | 1978-08-09 | ||
DK351178A DK145169C (en) | 1978-08-09 | 1978-08-09 | PLANT FOR REGISTERING A PASSAGE OF AN OBJECT THROUGH A PRESERVED AREA |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1980000386A1 true WO1980000386A1 (en) | 1980-03-06 |
Family
ID=8123744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK1979/000023 WO1980000386A1 (en) | 1978-08-09 | 1979-08-09 | System for the registration of the passage of articles through a previously determined field |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0016809A1 (en) |
DE (1) | DE2953405T1 (en) |
DK (1) | DK145169C (en) |
SE (1) | SE424116B (en) |
WO (1) | WO1980000386A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3233028A1 (en) * | 1981-09-10 | 1983-03-24 | Sensormatic Electronics Corp., 33441 Deerfield Beach, Fla. | ELECTRICAL MONITORING DEVICE WITH MOVABLE ANTENNA ELEMENTS |
USRE32627E (en) * | 1981-09-10 | 1988-03-22 | Sensormatic Electronics Corporation | Electrical surveillance apparatus with moveable antenna elements |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE451166C (en) * | 1986-01-21 | 1990-11-01 | Intermodulation & Safety Syst | RECEIVER DEVICE TO DETECT THE PRESENCE OF AN INDICATING DEVICE IN A LIMITED INVESTIGATION ZONE |
DE4107803A1 (en) * | 1991-03-11 | 1992-09-17 | Ant Nachrichtentech | ARRANGEMENT FOR LOCALIZING OBJECTS AND EXCHANGING DATA WITH THESE OBJECTS |
DE4222679C2 (en) * | 1992-07-07 | 1997-10-16 | Spreepatent Schutzrechtsverwer | Method and device for improved perception of events during the transmission of sporting events |
DE4414399A1 (en) * | 1994-04-26 | 1994-09-15 | Siegfried Mehl | Anti-theft element |
IL110597A (en) * | 1994-08-09 | 2002-11-10 | Micro Tag Temed Ltd | Method for labeling, verification and/or identifying an object and device for implementing said method |
DE9416490U1 (en) * | 1994-10-13 | 1994-12-22 | Schubert Peter Thomas | Device for determining objects in a surveillance area, in particular for preventing shoplifting, the field-generating and / or field-receiving components of which are integrated in a shut-off device that can be opened and closed |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2541982A (en) * | 1946-05-22 | 1951-02-20 | Henry E Bernstein | Radio ranging and craft identification system |
US3740742A (en) * | 1971-05-11 | 1973-06-19 | T Thompson | Method and apparatus for actuating an electric circuit |
US3810147A (en) * | 1971-12-30 | 1974-05-07 | G Lichtblau | Electronic security system |
US3818472A (en) * | 1972-05-26 | 1974-06-18 | K Mauk | R.f. system for detecting unauthorized travel of articles through a selected zone |
US4074249A (en) * | 1977-02-04 | 1978-02-14 | Knogo Corporation | Magnetic detection means |
US4135183A (en) * | 1977-05-24 | 1979-01-16 | Minnesota Mining And Manufacturing Company | Antipilferage system utilizing "figure-8" shaped field producing and detector coils |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3500373A (en) * | 1966-05-06 | 1970-03-10 | Nat Bank Of North America The | Method and apparatus for article theft detection |
NL161904C (en) * | 1973-04-13 | Knogo Corp | THEFT DETECTION SYSTEM. | |
US3961322A (en) * | 1974-07-02 | 1976-06-01 | Lichtblau G J | Real time signal discrimination circuitry |
-
1978
- 1978-08-09 DK DK351178A patent/DK145169C/en not_active IP Right Cessation
-
1979
- 1979-08-09 WO PCT/DK1979/000023 patent/WO1980000386A1/en unknown
- 1979-08-09 DE DE792953405T patent/DE2953405T1/en active Granted
-
1980
- 1980-03-11 EP EP79900978A patent/EP0016809A1/en not_active Withdrawn
- 1980-04-02 SE SE8002530A patent/SE424116B/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2541982A (en) * | 1946-05-22 | 1951-02-20 | Henry E Bernstein | Radio ranging and craft identification system |
US3740742A (en) * | 1971-05-11 | 1973-06-19 | T Thompson | Method and apparatus for actuating an electric circuit |
US3810147A (en) * | 1971-12-30 | 1974-05-07 | G Lichtblau | Electronic security system |
US3818472A (en) * | 1972-05-26 | 1974-06-18 | K Mauk | R.f. system for detecting unauthorized travel of articles through a selected zone |
US4074249A (en) * | 1977-02-04 | 1978-02-14 | Knogo Corporation | Magnetic detection means |
US4135183A (en) * | 1977-05-24 | 1979-01-16 | Minnesota Mining And Manufacturing Company | Antipilferage system utilizing "figure-8" shaped field producing and detector coils |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3233028A1 (en) * | 1981-09-10 | 1983-03-24 | Sensormatic Electronics Corp., 33441 Deerfield Beach, Fla. | ELECTRICAL MONITORING DEVICE WITH MOVABLE ANTENNA ELEMENTS |
USRE32627E (en) * | 1981-09-10 | 1988-03-22 | Sensormatic Electronics Corporation | Electrical surveillance apparatus with moveable antenna elements |
Also Published As
Publication number | Publication date |
---|---|
SE8002530L (en) | 1980-04-02 |
DE2953405T1 (en) | 1981-01-08 |
DE2953405C2 (en) | 1987-12-23 |
DK145169B (en) | 1982-09-20 |
EP0016809A1 (en) | 1980-10-15 |
DK145169C (en) | 1983-02-21 |
SE424116B (en) | 1982-06-28 |
DK351178A (en) | 1980-02-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6249229B1 (en) | Electronic article security system employing variable time shifts | |
AU570891B2 (en) | Electronic surveillance system employing the doppler effect | |
US4859991A (en) | Electronic article surveillance system employing time domain and/or frequency domain analysis and computerized operation | |
US4303910A (en) | Detection system | |
US5103234A (en) | Electronic article surveillance system | |
US3706094A (en) | Electronic surveillance system | |
AU674908B2 (en) | Electronic article security system | |
US4791412A (en) | Magnetic article surveillance system and method | |
CA2036378A1 (en) | Proximity detecting apparatus | |
US5877728A (en) | Multiple loop antenna | |
EP0848806B1 (en) | A detector for detecting vibrations | |
GB2112252A (en) | Theft detection method and apparatus in which the decay of a resonant circuit is detected | |
EP1242985A1 (en) | Security tag detection and localization system | |
WO1980000386A1 (en) | System for the registration of the passage of articles through a previously determined field | |
EP0663657A1 (en) | Anti-theft detection and identification system | |
JPH11161885A (en) | Egress/ingress monitoring system | |
CA2075991C (en) | Security system for surveilling the passage of commodities through defined zones | |
US4206453A (en) | Method and apparatus for electronic surveillance | |
GB2247382A (en) | Antenna array for an electronic article surveillance system | |
AU769526B2 (en) | Security systems for inhibiting theft of goods from retail stores | |
CA2181344C (en) | An alarm element | |
JPH10506210A (en) | Identification method and identification device | |
CN219225110U (en) | Electromagnetic wave induction device integrating receiving and transmitting | |
GB1604220A (en) | Detection systems | |
EP3355236B1 (en) | A method of reading a barcode and deactivating an electronic article surveillance tag |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Designated state(s): CH DE GB JP NL SE US |
|
AL | Designated countries for regional patents |
Designated state(s): CH DE FR GB NL SE |
|
RET | De translation (de og part 6b) |
Ref country code: DE Ref document number: 2953405 Date of ref document: 19810108 Format of ref document f/p: P |