Method and apparatus for tracking objects and people

• US 8,279,069 B2
• Filed: 10/11/2010
• Issued: 10/02/2012
• Est. Priority Date: 07/09/2002
• Status: Expired due to Term

• Current Assignee: Automated Tracking Solutions LLC
• Original Assignee: Automated Tracking Solutions LLC
• Inventors: Sawyer, Frederick
• Primary Examiner(s): TRIEU, VAN THANH
• Application Number:
  US12/901,889
• Publication Number:
  US 20110175734A1
• Time in Patent Office: 722 Days
• Field of Search: 340/539.1, 340/539.11, 340/539.13, 340/572.1, 340/572.4, 340/10.1, 340/10.4, 340/10.42, 235/384, 235/385, 702/150, 702/187, 705/22, 705/28
• US Class Current: 340/572.4
• CPC Class Codes: G01S 13/74 Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
• CPC Class Codes: G01S 7/003 Transmission of data between radar, sonar or lidar systems and remote stations
• CPC Class Codes: G06K 17/0029 the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10079 the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
• CPC Class Codes: G06K 7/10316 using at least one antenna particularly designed for interrogating the wireless record carriers antennas in general H01Q1/22
• CPC Class Codes: G06K 7/10346 the antenna being of the far field type, e.g. HF types or dipoles
• CPC Class Codes: G06K 7/10356 using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
• CPC Class Codes: G06K 7/10366 the interrogation device being adapted for miscellaneous applications
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders
• CPC Class Codes: G07C 9/28 the pass enabling tracking or indicating presence
• CPC Class Codes: G08B 21/0202 Child monitoring systems using a transmitter-receiver system carried by the parent and the child

Abstract

An object locating, identifying, tracking, and surveillance system, denoted the Assets Locating, Tracking, and Surveillance System (ALTSS), is provided for managing physical objects and evidence in environments such as police departments, law offices, and the Courts. ALTSS employs radio frequency identification (RFID) technology, computer programming and database applications, networking technologies, and hardware elements. ALTSS may locate and track physical evidence, merchandise, information carriers like files, folders or individual pieces of paper, and people, under certain conditions, in near-real time. It may be configured as part of a local area network, a wide area network, or the Internet. ALTSS may employ exemplary components such as RFID transponders, scanners, strategically located antennas and computers to facilitate tracking of objects and people as needed. Any number of users having access privileges and connected to the network may access ALTSS directly or remotely via the Internet to locate and track evidence or objects.

Claims

1. An RFID system comprising:

a reader that is configured to receive transponder data from a first transponder; and

a processor that is configured to receive the transponder data from said reader, and responsive to said received transponder data, to determine movement of the first transponder from a first coverage area to a second coverage area based on current transponder detection data and prior transponder detection data.

2. The system of claim 1, further comprising a plurality of transponders.

3. The system of claim 2, wherein each transponder in the plurality of transponders is configured to be affixed to a different object.

4. The system of claim 1, wherein the processor comprises a server logically connectable to the reader.

5. The system of claim 1, further comprising an antenna having a first coverage area for communicating radio frequency (RF) signals to and from the first transponder, the antenna being affixed to at least one of:

an entrance of a facility;

an exit of the facility;

a wall of the facility;

a ceiling of the facility; and

furniture within the facility.

6. The system of claim 1, further comprising:

a first plurality of transponders in the first coverage area, wherein the first plurality of transponders includes the first transponder.

7. The system of claim 1, wherein the processor is external to the reader.

8. The system of claim 1, wherein the processor is wirelessly coupled to the reader.

9. The system of claim 1, wherein the first transponder is configured to be affixed to the object.

10. The system of claim 9, wherein the object is a person.

11. The system of claim 1, wherein the processor is coupled to a data communications network.

12. The system of claim 11, wherein the data communications network is the Internet.

13. The system of claim 1, further comprising a user terminal coupled to the processor.

14. The system of claim 13, wherein the user terminal includes an application configured to determine status and location information of the first transponder.

15. The system of claim 13, wherein the user terminal accesses an application configured to determine status and location information of the first transponder.

16. The system of claim 1, wherein the reader is coupled to a plurality of antennas, each having a different antenna coverage area.

17. The system of claim 1, wherein the processor is configured to update the detection data for the first transponder each time the reader receives data from the transponder.

18. The system of claim 1, wherein the detection data includes a first sighting and a last sighting, each of which are represented by a single bit.

19. The system of claim 1, wherein the first transponder is an active tag.

20. The system of claim 1, wherein the first transponder is a passive tag.

21. The system of claim 1, further comprising:

a first antenna configured to be coupled to the reader, wherein a coverage zone of said first antenna includes said first coverage area; and

a second antenna configured to be coupled to the reader, wherein a coverage zone of said second antenna includes said second coverage area.

22. The system of claim 21, wherein the reader is configured to perform a continuous series of read cycles during a first period of time, wherein the reader is further configured to read one or more transponders in the first coverage area during a read cycle.

23. The system of claim 22, wherein the reader is further configured to perform a second continuous series of read cycles during a second period of time, wherein the reader is further configured to read one or more transponders in a second plurality of transponders in the first coverage area during the second period of time.

24. The system of claim 21, wherein the first antenna is integrated with the reader.

25. The system of claim 21, wherein the first coverage area is within a facility and wherein the facility comprises a plurality of additional coverage areas.

26. The system of claim 25, wherein the facility is a department store, a warehouse, or a hospital.

27. The system of claim 25, wherein the first antenna is situated at an entrance of the facility.

28. The system of claim 25, wherein the first antenna is situated at an exit of the facility.

29. The system of claim 21, further comprising:

a storage device that is configured to store movement data representing the movement of the first transponder from the first coverage area to the second coverage area.

30. The system of claim 29, wherein the storage device is further configured to store a timestamp associated with the movement data.

31. The system of claim 21, wherein the processor is further configured to generate a report including movement data representing the movement of the first transponder from the first coverage area to the second coverage area.

32. The system of claim 31, wherein the report further includes a timestamp associated with the movement data.

33. The system of claim 21, wherein the first antenna is configured to transmit and receive RF signals to and from transponders in the first coverage area.

34. The system of claim 33, wherein the second antenna is configured to transmit and receive RF signals to and from a second plurality of transponders in the second coverage area.

35. The system of claim 1, further comprising:

a second reader that is configured to receive transponder data from the first transponder;

a first antenna configured to be coupled to the first reader, wherein a coverage zone of said first antenna includes said first coverage area; and

a second antenna configured to be coupled to the second reader, wherein a coverage zone of said second antenna includes said second coverage area.

36. The system of claim 1, further comprising:

a storage device that is configured to store movement data representing the movement of the first transponder from the first coverage area to the second coverage area.

37. The system of claim 36, wherein the storage device is further configured to store a first table including transponders detected during a first monitoring period.

38. The system of claim 37, wherein the storage device is further configured to store a second table including transponders detected during a second monitoring period.

39. The system of claim 38, wherein the processor is further configured to compare the first table with the second table to determine if the first transponder has exited the first coverage area.

40. The system of claim 39, wherein the first table includes a last sighting of the first transponder in the first coverage area.

41. The system of claim 38, wherein the processor is further configured to compare the first table with the second table to determine if a second transponder has entered the first coverage area.

42. The system of claim 41, wherein the second table includes a first sighting of the second transponder in the first coverage area.

43. The system of claim 38, wherein the processor is further configured to compare the first table with the second table to determine if the first transponder is dwelling in the first coverage area.

44. The system of claim 43, wherein the first table includes a first sighting of the first transponder in the first coverage area and the second table includes a last sighting of the first transponder in the first coverage area.

45. The system of claim 38, wherein the storage device is further configured to store a third table including transponders detected in the second coverage area during the first monitoring period.

46. The system of claim 45, wherein the storage device is further configured to store a fourth table including transponders detected in the second coverage area during the second monitoring period.

47. The system of claim 46, wherein the processor is further configured to compare the first table with the fourth table to determine that the first transponder has moved from the first coverage area to the second coverage area.

48. The system of claim 46, wherein the processor is further configured to compare the second table with the fourth table to determine if a second transponder has moved from the second coverage area to the first coverage area.

49. The system of claim 38, wherein the first table further includes transponders detected in the second coverage area during the first monitoring period.

50. The system of claim 49, wherein the second table further includes transponders detected in the second coverage area during the second monitoring period.

51. The system of claim 50, wherein the processor is further configured to compare the first table with the second table to determine that the first transponder has moved from the first coverage area to the second coverage area.

52. The system of claim 50, wherein the processor is further configured to compare the first table with the second table to determine if a second transponder has moved from the second coverage area to the first coverage area.

53. The system of claim 37, wherein the first table includes a first sighting and last sighting of the first transponder in the first coverage area.

54. The system of claim 36, wherein the storage device is further configured to store a timestamp associated with the movement data.

55. The system of claim 1, wherein the processor is further configured to generate a report including movement data representing the movement of the first transponder from the first coverage area to the second coverage area.

56. The system of claim 55, wherein the report further includes a timestamp associated with the movement data.

57. The system of claim 1, wherein the processor is further configured to generate a report including movement data representing the movement of the first transponder from the first coverage area to the second coverage area.

58. The system of claim 57, wherein the report further includes a timestamp associated with the movement data.

59. The system of claim 1, further comprising an antenna having a first coverage area for communicating radio frequency (RF) signals to and from the first transponder, wherein the antenna is integrated with the reader.

60. The system of claim 59, wherein the reader is further configured to perform a continuous series of read cycles of the coverage area during a first period of time, wherein the reader is further configured to read one or more transponders in the coverage area during a read cycle.

61. The system of claim 60, wherein the processor is external to the reader.

62. A RFID system comprising:

a reader that is configured to receive transponder data from a plurality of transponders; and

a processor that is configured to receive transponder data associated with a first transponder in the plurality of transponders from said reader, and responsive to said received transponder data, to determine movement of the first transponder from a first coverage area to a second coverage area based on first transponder detection data associated with the first transponder and second transponder detection data associated with the first transponder.

63. The RFID system of claim 62, wherein said first transponder detection data associated with the first transponder is received by the reader at a first time and said second transponder detection data associated with the first transponder is received by the reader at a second time.

64. The RFID system of claim 63, wherein the second time is prior to the first time.

65. The RFID system of claim 62, further comprising:

a first antenna configured to be coupled to the reader, wherein a coverage zone of said first antenna includes said first coverage area; and

a second antenna configured to be coupled to the reader, wherein a coverage zone of said second antenna includes said second coverage area.

66. The system of claim 65, wherein the reader is further configured to perform a continuous series of read cycles of the first coverage area during a first period of time, wherein the reader is further configured to read one or more transponders in the first coverage area during a read cycle.

67. The system of claim 66, wherein the reader is further configured to perform a continuous series of read cycles of the second coverage area during the first period of time, wherein the reader is further configured to read one or more transponders in the second coverage area during a read cycle.

68. The system of claim 67, wherein the reader is further configured to perform a continuous series of read cycles of the first coverage area during a second period of time, wherein the reader is further configured to read one or more transponders in the first coverage area during a read cycle.

69. The system of claim 68, wherein the reader is further configured to perform a continuous series of read cycles of the second coverage area during the second period of time, wherein the reader is further configured to read one or more transponders in the second coverage area during a read cycle.

70. The RFID system of claim 65, further comprising:

a storage device that is configured to store movement data representing the movement of the first transponder from the first coverage area to the second coverage area.

71. The RFID system of claim 70, wherein the storage device is further configured to store a first list of transponders detected in the first coverage area during a first monitoring period.

72. The RFID system of claim 71, wherein the storage device is further configured to store a second list of transponders detected in the second coverage area during the first monitoring period.

73. The RFID system of claim 72, wherein the storage device is further configured to store a third list of transponders detected in the first coverage area during a second monitoring period.

74. The RFID system of claim 73, wherein the storage device is further configured to store a fourth list of transponders detected in the second coverage area during the second monitoring period.

75. The RFID system of claim 74, wherein the processor is configured to determine that the first transponder has moved from the first coverage area to the second coverage area by comparing the first list and the fourth list.

76. The RFID system of claim 74, wherein the processor is configured to determine that a second transponder has moved from the second coverage area to the first coverage area by comparing the second list and the third list.