CA2526412A1 - Article identification and tracking using electronic shadows created by rfid tags - Google Patents
Article identification and tracking using electronic shadows created by rfid tags Download PDFInfo
- Publication number
- CA2526412A1 CA2526412A1 CA002526412A CA2526412A CA2526412A1 CA 2526412 A1 CA2526412 A1 CA 2526412A1 CA 002526412 A CA002526412 A CA 002526412A CA 2526412 A CA2526412 A CA 2526412A CA 2526412 A1 CA2526412 A1 CA 2526412A1
- Authority
- CA
- Canada
- Prior art keywords
- identification
- location
- tracking system
- shadow
- detection
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
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- 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
- G08B13/2451—Specific applications combined with EAS
- G08B13/2462—Asset location systems combined with EAS
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
- G06K7/10079—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10336—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the near field type, inductive coil
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/20—Individual registration on entry or exit involving the use of a pass
- G07C9/28—Individual registration on entry or exit involving the use of a pass the pass enabling tracking or indicating presence
Abstract
A tracking system uses RFID (radio frequency identification) tag technology to facilitate the identification and tracking of items in an environment through a technique known as shadowing. As an object or target moves within a pre-described detection zone with communicating antenna and RFID sensors, the object or target blocks the line of sight between respective antenna and sensors, preventing electromagnetic coupling between the sensor and the antenna and thus casting an electromagnetic shadow along the line of sight.
One approach of this invention uses this shadow technique to perform functions such as theft (shrink) deterrence/ detection; tracking the motion of objects through an environment by monitoring the shadow; and correlation analysis of people shadows to tagged items (e.g., merchandise, articles) to foster marketing and merchandising effectiveness.
One approach of this invention uses this shadow technique to perform functions such as theft (shrink) deterrence/ detection; tracking the motion of objects through an environment by monitoring the shadow; and correlation analysis of people shadows to tagged items (e.g., merchandise, articles) to foster marketing and merchandising effectiveness.
Claims (27)
1. A tracking system, comprising:
an identification sensor positioned at a first location, said identification sensor having a responsive circuit;
an antenna positioned at a second location, said antenna adapted to detect said identification sensor by interactive coupling between said antenna and said identification sensor via communication signals therebetween; and a processing member adapted to determine an absence of detection of said identification sensor by said antenna, interpret the absence of detection as indicia of an electronic shadow between the first location and the second location, and infer a presence of an object as cause for the electronic shadow.
an identification sensor positioned at a first location, said identification sensor having a responsive circuit;
an antenna positioned at a second location, said antenna adapted to detect said identification sensor by interactive coupling between said antenna and said identification sensor via communication signals therebetween; and a processing member adapted to determine an absence of detection of said identification sensor by said antenna, interpret the absence of detection as indicia of an electronic shadow between the first location and the second location, and infer a presence of an object as cause for the electronic shadow.
2. The tracking system of Claim 1, further comprising a plurality of identification sensors, each of said plurality of identification sensors positioned at a respective location for detection by interactive coupling between each sensor and said antenna, wherein said processing member is further adapted to determine an absence of detection of at least one of said plurality of identification sensors by said antenna, interpret the absence of detection as indicia of an electronic shadow between said antenna and said at least one of said plurality of identification sensors, and inferring the presence of at least one object as cause for the electronic shadow:
3. The tracking system of Claim 2, wherein said antenna is adapted to periodically detect said plurality of identification sensors by repeated interactive coupling between said antenna and said identification sensors, and said processing member is further adapted to track movement of the object by monitoring movement of the electronic shadow.
4. The tracking system of Claim 2, wherein each of said plurality of identification sensors is fixed.
5. The tracking system of Claim 4, said antenna further adapted to detect a mobile identification tag adjacent the electronic shadow by interactive coupling between said antenna and the mobile identification tag, said processing member associating the mobile identification tag with the electronic shadow.
6. The tracking system of Claim 5, wherein said processing member is further adapted to track movement of the mobile identification tag by monitoring movement of the associated electronic shadow.
7. The tracking system of Claim 4, said antenna further adapted to detect a mobile identification tag attached to a product by interactive coupling between said antenna and the mobile identification tag, said processing member associating the product with the electronic shadow.
8. The tracking system of Claim 7, wherein said processing member is further adapted to track movement of the product by monitoring movement of the electronic shadow.
9. The tracking system of Claim 7, wherein said processing member is further adapted to associate the product with a complimentary product related to the product, and further comprising a display device in communication with said processing member for advertising the complimentary product.
10. The tracking system of Claim 1, further comprising a plurality of antennas, each of said plurality of antennas positioned at a respective fixed location for detecting said identification sensor by interactive coupling between said antennas and said identification sensor via communication signals therebetween, wherein said processing member is further adapted to determine an absence of detection of said identification sensor by at least one of said plurality of antennas, to interpret the absence of detection as indicia of an electronic shadow between said identification sensor and said at least one of said plurality of antennas, and to estimate a size of the object based on a detection or absence of detection of said identification sensor by said plurality of antennas.
11. The tracking system of Claim 1, further comprising a plurality of identification sensors and a plurality of antennas, each of said plurality of identification sensors positioned at a respective fixed portion of the first location, each of said plurality of antennas positioned at a respective fixed portion of the second location for detecting at least one of said plurality of identification sensors by interactive coupling between said plurality of antennas and said plurality of identification sensor via communication signals therebetween, wherein said processing member is further adapted to determine an absence of detection of any of said plurality of identification sensors by at least one of said plurality of antennas, and interpret the absence of detection of said identification sensors as indicia of an electronic shadow between said identification sensors and said at least one of said antennas.
12. The tracking system of Claim 11, wherein said processing member is further adapted to estimate a size of a footprint of the object as less than a size of the electronic shadow.
13. The tracking system of Claim 1, wherein said processing member includes a computer.
14. The tracking system of Claim 1, wherein said processing member includes a computer program.
15. The tracking system of Claim 1, wherein the first location is in a floor and the second location is in a ceiling.
16. The tracking system of Claim 1, wherein said identification sensor is an RFID
sensor and said responsive circuit is a resonant rf circuit.
sensor and said responsive circuit is a resonant rf circuit.
17. A tracking system, comprising:
means for communicating signals along a line of sight between a first location and a second location;
means for detecting the communicated signals at the second location;
means for determining an absence of detection of one of the communicated signals at the second location;
means for interpreting the absence of detection as indicia of a shadow between the first location and the second location; and means for inferring a presence of an object as cause for the shadow.
means for communicating signals along a line of sight between a first location and a second location;
means for detecting the communicated signals at the second location;
means for determining an absence of detection of one of the communicated signals at the second location;
means for interpreting the absence of detection as indicia of a shadow between the first location and the second location; and means for inferring a presence of an object as cause for the shadow.
18. The tracking system of Claim 17, further comprising means for estimating a size of the object.
19. The tracking system of Claim 17, further comprising means for monitoring movement of the shadow to track the object.
20. The tracking system of Claim 17, further comprising means for detecting an identification tag, and means fox associating the identification tag with the shadow.
21. The tracking system of Claim 17, further comprising means for detecting an identification tag, means for associating the identification tag with a product, means for associating the product with a complimentary product related to the product, and means for advertising the complimentary product.
22. A method for targeting an object, comprising:
communicating signals a long a line of sight between a first location and a second location;
detecting the communicated signals at the second location;
determining an absence of detection of one of the communicated signals at the second location;
interpreting the absence of detection as indicia of a shadow between the first location and the second location; and inferring a presence of the object as cause for the shadow.
communicating signals a long a line of sight between a first location and a second location;
detecting the communicated signals at the second location;
determining an absence of detection of one of the communicated signals at the second location;
interpreting the absence of detection as indicia of a shadow between the first location and the second location; and inferring a presence of the object as cause for the shadow.
23. The method of Claim 22, further comprising estimating a size of the object.
24. The method of Claim 22, further comprising monitoring movement of the shadow to track the object.
25. The method of Claim 24, further comprising sending an alarm based on the movement of the shadow.
26. The method of Claim 22, further comprising detecting an identification tag, and associating the identification tag with the shadow.
27. The method of Claim 22, further comprising detecting an identification tag, associating the identification tag with a product, associating the product with a complimentary product related to the product, and advertising the complimentary product.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US47188503P | 2003-05-19 | 2003-05-19 | |
US60/471,885 | 2003-05-19 | ||
US10/847,129 US7081818B2 (en) | 2003-05-19 | 2004-05-17 | Article identification and tracking using electronic shadows created by RFID tags |
US10/847,129 | 2004-05-17 | ||
PCT/US2004/015819 WO2004104957A1 (en) | 2003-05-19 | 2004-05-18 | Article identification and tracking using electronic shadows created by rfid tags |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2526412A1 true CA2526412A1 (en) | 2004-12-02 |
CA2526412C CA2526412C (en) | 2009-12-22 |
Family
ID=33479303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002526412A Expired - Fee Related CA2526412C (en) | 2003-05-19 | 2004-05-18 | Article identification and tracking using electronic shadows created by rfid tags |
Country Status (9)
Country | Link |
---|---|
US (1) | US7081818B2 (en) |
EP (1) | EP1625557B1 (en) |
JP (1) | JP4308261B2 (en) |
KR (1) | KR100746695B1 (en) |
AU (1) | AU2004241592B2 (en) |
CA (1) | CA2526412C (en) |
ES (1) | ES2388854T3 (en) |
MX (1) | MXPA05012501A (en) |
WO (1) | WO2004104957A1 (en) |
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AU2004241592B2 (en) | 2007-03-15 |
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