System and method for monitoring assets, objects, people and animals utilizing impulse radio

• US 6,989,751 B2
• Filed: 10/08/2004
• Issued: 01/24/2006
• Est. Priority Date: 09/27/1999
• Status: Expired due to Term

• Current Assignee: Plus Location Systems Pty. Limited
• Original Assignee: Time Domain Corporation (Humatics Corporation)
• Inventors: Richards, James L.
• Primary Examiner(s): TRIEU, VAN THANH
• Application Number:
  US10/961,807
• Publication Number:
  US 20050046583A1
• Time in Patent Office: 473 Days
• Field of Search: 340/539.13, 340/539.21, 340/568.1, 340/568.5, 340/568.6, 340/571, 340/572.1, 340/572.2, 340/572.4, 340/573.1, 340/573.3, 340/573.4, 342/28, 342/33
• US Class Current: 340/572.4
• CPC Class Codes: G01S 2205/002 for traffic control, mobile tracking, guidance, surveillance or anti-collision
• CPC Class Codes: G01S 5/0036 of measured values, i.e. measurement on mobile and position calculation on base station
• CPC Class Codes: G01S 5/021 Calibration, monitoring or correction G01S5/0252 takes precedence
• CPC Class Codes: G01S 5/02216 Timing or synchronisation of the receivers
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location
• 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 7/10306 ultra wide band
• CPC Class Codes: G06Q 10/08 Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
• CPC Class Codes: H04B 1/7163 using impulse radio
• CPC Class Codes: H04B 1/71632 Signal aspects H04B1/7172 and H04B1/7176 take precedence
• CPC Class Codes: H04B 1/7183 Synchronisation
• CPC Class Codes: H04B 1/719 Interference-related aspects
• CPC Class Codes: H04B 2001/6908 using time hopping

Abstract

An asset, object, person or animal monitoring system and associated method for monitoring assets, objects, people or animals utilizing impulse radio techniques. The asset, object, person or animal monitoring system of the present invention can vary the duty cycles of the impulse radio transmitters, by both manual and automatic means, to adapt to varied requirements.

Claims

1. A method for monitoring the contents within a structure, comprising:

placing at least one first ultra wideband radio inside said structure; and

transmitting, during at least one transmission interval, ultra wideband signals from said at least one first ultra wideband radio to at least one second ultra wideband radio, wherein said ultra wideband signals convey information about the contents within the structure.

2. The method of claim 1, wherein said at least one second ultra wideband radio interfaces with at least one of a central station and a monitor.

3. The method of claim 1, wherein the location of said at least one second ultra wideband radio is one of:

inside said structure;

within a wall of said structure; and

outside said structure.

4. The method of claim 1, wherein said at least one second ultra wideband radio is mounted to the exterior of the structure.

5. The method of claim 1, wherein said structure is a mobile structure.

6. The method of claim 5, wherein said mobile structure is one of:

a tractor trailer;

a rail car;

a shipping container;

a barge;

an offshore oil rig;

an offshore gas rig;

a mobile office; and

a home trailer.

7. The method of claim 1, wherein said structure is an immobile structure.

8. The method of claim 7, wherein said immobile structure is one of:

a building;

a hospital;

a prison;

a home;

a warehouse; and

a designated area within an open field.

9. The method of claim 1, wherein said structure is one of an enclosed structure and an open structure.

10. The method of claim 1, wherein said information comprises at least one position related to said contents within said structure.

11. The method of claim 10, wherein said at least one position is determined using ultra wideband position determination technology.

12. The method of claim 1, wherein said information comprises at least one location related to said contents and said structure.

13. The method of claim 12, wherein said at least one location is determined using Global Positioning System technology.

14. The method of claim 1, wherein said contents comprises at least one of:

assets;

people;

objects;

animals;

freight;

crates; and

cargo.

15. The method of claim 1, wherein said contents comprises at least one of biohazardous material and refrigerated material.

16. The method of claim 1, wherein at least one of said at least one first ultra wideband radio is attached to at least a portion of said contents.

17. The method of claim 1, wherein said information comprises at least one of the identity, status, position, and location of said at least a portion of said contents.

18. The method of claim 1, further comprising the step of:

associating at least one sensor with said at least one first ultra wideband radio, wherein at least a portion of said information is from said at least one sensor.

19. The method of claim 18, wherein said at least one sensor monitors at least one of:

temperature;

humidity; and

structural integrity.

20. The method of claim 18, wherein said at least one sensor provides an interrupt signal to said at least one first ultra wideband radio when a parameter is outside acceptable limits.

21. The method of claim 20, wherein said information comprises a warning signal.

22. The method of claim 1, further comprising the step of:

setting an alarm condition when at least part of said information is outside acceptable limits.

23. The method of claim 1, wherein said at least one transmission interval is in accordance with a duty cycle.

24. The method of claim 23, wherein said duty cycle is one of predetermined and selectable.

25. The method of claim 1, wherein the at least one second ultra wideband radio activates the at least one first ultra wideband radio.

26. The method of claim 25, wherein the activation is via a wireless switch.

27. The method of claim 26, wherein the wireless switch sets the data rate of said at least one first ultra wideband radio.

28. The method of claim 1, wherein the at least one first ultra wideband radio transmits said ultra wideband signals at a prearranged time.

29. The method of claim 1, wherein said at least one first ultra wideband radio and said at least one second ultra wideband radio are time synchronized and said at least one transmission interval is at a predetermined time.

30. The method of claim 29, wherein said time synchronization is accomplished by using a Universal Time Code time.

31. The method of claim 29, wherein said time synchronization is accomplished by at least one of an infrared current time transfer, an optical current time transfer, and an RF wireless current time transfer.

32. The method of claim 1, wherein said at least one second ultra wideband radio receives a transmission from said at least one first ultra wideband radio that identifies said at least one first ultra wideband radio, said at least one second ultra wideband radio is programmed to know a duty cycle of that at least one first ultra wideband radio, and said at least one second ultra wideband radio determines said at least one transmission interval based on said duty cycle.

33. The method of claim 1, wherein said at least one transmission interval is predetermined.

34. The method of claim 1, wherein said at least one second ultra wideband radio listens for said ultra wideband signals during at least one time interval corresponding to the at least one transmission interval.

35. The method of claim 34, wherein said at least one time interval surrounds said at least one transmission interval.

36. The method of claim 34, wherein said at least one time interval is increased by anticipated inaccuracies due to clock drift or timing inaccuracies of the at least one first ultra wideband radio.

37. A system for monitoring the contents within a structure, said system comprising:

at least one first ultra wideband impulse radio capable of transmitting during at least one transmission interval, ultra wideband signals to at least one second ultra wideband radio, wherein said ultra wideband signals convey information about the contents within the structure.

38. The system of claim 37, wherein said at least one second ultra wideband radio interfaces with at least one of a central station and a monitor.

39. The system of claim 37, wherein the location of said at least one second ultra wideband radio is one of:

inside said structure;

within a wall of said structure; and

outside said structure.

40. The system of claim 37, wherein said structure is a mobile structure including one of

a tractor trailer;

a rail car;

a shipping container;

a barge;

an offshore oil rig;

an offshore gas rig;

a mobile office; and

a home trailer.

41. The system of claim 37, wherein said structure is an immobile structure including one of

a building;

a hospital;

a prison;

a home;

a warehouse; and

a designated area within an open field.

42. The system of claim 37, wherein said information comprises at least one position related to said contents within said structure, wherein said at least one position is determined using ultra wideband position determination technology.

43. The system of claim 37, wherein said information comprises at least one location related to said contents and said structure, wherein said at least one location is determined using Global Positioning System technology.

44. The system of claim 37, wherein said contents comprises at least one of:

assets;

people;

objects;

animals;

freight;

crates; and

cargo.

45. The system of claim 37, further comprising the step of:

associating at least one sensor with said at least one first ultra wideband radio, wherein at least a portion of said information is from said at least one sensor.

46. The system of claim 37, wherein said at least one sensor monitors at least one of:

temperature;

humidity; and

structural integrity.

47. The system of claim 37, wherein said at least one transmission interval is in accordance with one of a predetermined duty cycle and a selectable duty cycle.

48. The system of claim 37, wherein the at least one second ultra wideband radio activates the at least one first ultra wideband radio.

49. The system of claim 37, wherein the at least one first ultra wideband radio transmits said ultra wideband signals at a prearranged time.

50. The system of claim 37, wherein said at least one first ultra wideband radio and said at least one second ultra wideband radio are time synchronized and said at least one transmission interval is at a predetermined time.

51. The system of claim 37, wherein said at least one second ultra wideband radio receives a transmission from said at least one first ultra wideband radio that identifies said at least one first ultra wideband radio, said at least one second ultra wideband radio is programmed to know a duty cycle of that at least one first ultra wideband radio, and said at least one second ultra wideband radio determines said at least one transmission interval based on said duty cycle.

52. The system of claim 37, wherein said at least one transmission interval is predetermined.

53. The system of claim 37, wherein said at least one second ultra wideband radio listens for said ultra wideband signals during at least one time interval corresponding to the at least one transmission interval.

54. The system of claim 37, wherein said at least one time interval surrounds said at least one transmission interval.