Lamp monitoring and control unit and method

• US 6,393,381 B1
• Filed: 02/09/2000
• Issued: 05/21/2002
• Est. Priority Date: 04/16/1997
• Status: Expired due to Term

• Current Assignee: Lightronics Incorporated
• Original Assignee: A.L. Air Data, Inc.
• Inventors: Williams, Larry, Jones, Hunter V., Young, Michael F.
• Primary Examiner(s): ASSOUAD, PATRICK J
• Application Number:
  US09/501,274
• Time in Patent Office: 832 Days
• Field of Search: 702/188, 702/57, 315/129, 315/133, 315/134, 315/149, 315/307, 340/870.01, 340/870.07, 340/870.16, 340/825.06, 455/422, 455/403, 455/423, 455/73
• US Class Current: 702/188
• CPC Class Codes: H05B 47/175 by remote control
• CPC Class Codes: H05B 47/19 via wireless transmission
• CPC Class Codes: H05B 47/195 the transmission using visible or infrared light
• CPC Class Codes: H05B 47/22 with communication between the lamps and a central unit

Abstract

A unit and method for remotely monitoring and/or controlling an apparatus and specifically for remotely monitoring and/or controlling street lamps. The lamp monitoring and control unit comprises a processing and sensing unit for sensing at least one lamp parameter of an associated lamp, and for processing the lamp parameter to monitor and control the associated lamp by outputting monitoring data and control information, and a transmit unit for transmitting the monitoring data, representing the at least one lamp parameter, from the processing and sensing unit. The method for monitoring and controlling a lamp comprises the steps of: sensing at least one lamp parameter of an associated lamp; processing the at least one lamp parameter to produce monitoring data and control information; transmitting the monitoring data; and applying the control information.

Claims

1. A lamp monitoring and control unit, comprising:

a processing and sensing unit to sense at least one lamp parameter of an associated lamp, and to process the at least one lamp parameter to monitor and control the associated lamp by outputting monitoring data and control information; and

a wireless transmit unit coupled to transmit the monitoring data, representing said at least one lamp parameter, from said processing and sensing unit.

2. The lamp monitoring and control unit of claim 1, further comprising:

a light sensor, coupled to said processing and sensing unit, for sensing an amount of ambient light, producing a light signal associated with the amount of ambient light, and outputting the light signal to said processing and sensing unit.

3. The lamp monitoring and control unit of claim 2, wherein the light signal from said light sensor is a threshold indication signal.

4. The lamp monitoring and control unit of claim 2, wherein said light sensor includes a photo sensor and associated light sensor circuitry.

5. The lamp monitoring and control unit of claim 1, wherein said processing and sensing unit receives a hot power line and a neutral power line and outputs a switched power line.

6. The lamp monitoring and control unit of claim 5, wherein the lamp monitoring and control unit is coupled to the associated lamp via a standard three prong plug which carries the hot power line, the switched power line, and the neutral power line.

7. The lamp monitoring and control unit of claim 5, wherein the processing and sensing unit includes a relay for switching the switched power line to the hot power line.

8. The lamp monitoring and control unit of claim 5, wherein the processing and sensing unit includes a current sensor for sensing a switched current in the switched power line.

9. The lamp monitoring and control unit of claim 8, wherein the current sensor includes a transformer and associated circuitry to produce a DC voltage associated with the switched current.

10. The lamp monitoring and control unit of claim 8, wherein the processing and sensing unit includes an A/D converter for converting a DC voltage associated with the switched current to a switched current data signal.

11. The lamp monitoring and control unit of claim 5, wherein the processing and sensing unit includes a voltage sensor for sensing a switched voltage in the switched power line.

12. The lamp monitoring and control unit of claim 5, further comprising a power supply for receiving the hot power line and the neutral power line and for outputting at least one internal voltage.

13. The lamp monitoring and control unit of claim 1, wherein the monitoring data is transmitted to a centralized base station.

14. The lamp monitoring and control unit of claim 1, wherein said transmit unit includes a transmitter and a modified directional discontinuity ring radiator.

15. The lamp monitoring and control unit of claim 14, wherein said modified directional discontinuity ring radiator includes a plurality of loops for resonance at a desired frequency range.

16. The lamp monitoring and control unit of claim 1, wherein said transmit unit transmits signals in a frequency range of 218-219 MHz.

17. The lamp monitoring and control unit of claim 1, wherein the associated lamp is a street lamp.

18. The lamp monitoring and control unit of claim 1, wherein the associated lamp is a mercury-vapor lamp.

39. The lamp monitoring and control unit of claim 1, wherein the lamp monitoring and control unit is coupled to the associated lamp via a standard three prong plug.

40. The lamp monitoring and control unit of claim 1, wherein said transmit unit has an range of more than 30 meters.

45. The lamp monitoring and control unit of claim 1, wherein the wireless transmit unit transmits the monitoring data in free space.

46. The lamp monitoring and control unit of claim 1, wherein the wireless transmit unit further comprises a directional antenna to direct the transmission of the monitoring data.

47. The lamp monitoring and control unit of claim 1, wherein the wireless transmit unit is configured for point-to-point communication.

48. The lamp monitoring and control unit of claim 1, wherein the wireless transmit unit comprises a radio frequency (RF) transmitter.

49. The lamp monitoring and control unit of claim 1, wherein the control information comprises a request to send signal.

50. The lamp monitoring and control unit of claim 1, wherein the request to send signal is transmitted by the wireless transmit unit prior to transmitting the monitoring data to prevent a data collision.

19. A lamp monitoring and control unit, comprising:

a processing unit for processing at least one lamp parameter and outputting a relay control signal;

a light sensor, coupled to said processing unit, for sensing an amount of ambient light, producing a light signal associated with the amount of ambient light, and outputting the light signal to said processing unit;

a relay for switching a switched power line to a hot power line based upon the relay control signal from said processing unit;

a voltage sensor, coupled to said processing unit, for sensing a switched voltage in the switched power line;

a current sensor, coupled to the switched power line, for sensing a switched current in the switched power line; and

a wireless transmit unit for spontaneously transmitting monitoring data, representing said at least one lamp parameter, from said processing unit.

20. The lamp monitoring and control unit of claim 19, further comprising a lamp assembly for receiving the switched power line.

21. The lamp monitoring and control unit of claim 20, wherein said lamp assembly includes a lamp and a starting circuit.

22. The lamp monitoring and control unit of claim 19, further comprising an A/D converter, coupled between said current sensor and said processing unit, for converting a DC voltage from said current sensor, associated with the switched current, to a switched current data signal.

23. The lamp monitoring and control unit of claim 19, wherein said current sensor includes a transformer and associated circuitry to produce a DC voltage associated with the switched current.

51. The lamp monitoring and control unit of claim 19, wherein the wireless transmit unit transmits the monitoring data in free space.

52. The lamp monitoring and control unit of claim 19, wherein the wireless transmit unit further comprises a directional antenna to direct the transmission of the monitoring data.

53. The lamp monitoring and control unit of claim 19, wherein the wireless transmit unit is configured for point-to-point communication.

54. The lamp monitoring and control unit of claim 19, wherein the wireless transmit unit comprises a radio frequency (RF) transmitter.

24. A method for monitoring and controlling a lamp comprising:

sensing at least one lamp parameter of the lamp;

processing the at least one lamp parameter to produce monitoring data and control information;

spontaneously transmitting the monitoring data in free space; and

applying the control information to the lamp.

25. The method for monitoring and controlling a lamp of claim 24, wherein said step of sensing includes sensing an amount of ambient light and said step of processing includes producing a light signal associated with the amount of ambient light.

26. The method for monitoring and controlling a lamp of claim 24, wherein said step of sensing includes sensing an electrical current.

27. The method for monitoring and controlling a lamp of claim 26, wherein said step of sensing an electrical current includes outputting a DC voltage representative of the current and converting the DC voltage from analog to digital.

28. The method for monitoring and controlling a lamp of claim 24, wherein said step of sensing includes sensing an electrical voltage.

29. The method for monitoring and controlling a lamp of claim 28, wherein said step of sensing an electrical voltage includes comparing the electrical voltage to a threshold voltage value.

30. The method for monitoring and controlling a lamp of claim 24, wherein said step of processing includes providing an initial delay to prevent false triggering.

31. The method for monitoring and controlling a lamp of claim 30, wherein the initial delay for a sunrise threshold condition is at least 45 seconds.

32. The method for monitoring and controlling a lamp of claim 24, wherein said step of applying control information includes providing a current stabilization delay when outputting a lamp turn-on signal.

33. The method for monitoring and controlling a lamp of claim 32, wherein the current stabilization delay is at least 10 minutes.

34. The method for monitoring and controlling a lamp of claim 24, wherein said step of applying control information includes providing a relay settle delay when outputting a lamp turn-off signal.

35. The method for monitoring and controlling a lamp of claim 34, wherein the relay settle delay is at least 0.5 seconds.

36. The method for monitoring and controlling a lamp of claim 24, wherein said step of transmitting the monitoring data includes a reporting start time delay.

37. The method for monitoring and controlling a lamp of claim 36, wherein the reporting start time delay is pseudo-random.

38. The method for monitoring and controlling a lamp of claim 36, wherein the reporting start time delay is based on a serial number.

55. The method of claim 24, wherein the step of spontaneously transmitting the monitoring data in free space comprises a point-to-point transmission.

56. The method of claim 24, wherein the step of spontaneously transmitting the monitoring data in free space comprises a wireless transmission of the monitoring data.

57. The method of claim 24, wherein a wireless transmitter is used to spontaneously transmit the monitoring data.

58. The method of claim 57, wherein the wireless transmitter comprises a radio frequency transmitter.

59. The method of claim 24, further comprising transmitting the control information, wherein the control information comprises a request to send signal to prevent a data collision.

41. A lamp monitoring and control unit adapted to be coupled to an associated lamp, comprising:

a processing and sensing unit which senses at least one lamp parameter of the associated lamp, and processes the at least one lamp parameter to monitor and control the associated lamp by outputting monitoring data and control information; and

a wireless transmitter which spontaneously broadcasts the monitoring data, representing said at least one lamp parameter, from said processing and sensing unit.

42. The lamp monitoring and control unit of claim 41, wherein said transmit unit broadcasts the monitoring data to a central geographic location.

43. The lamp monitoring and control unit of claim 41, wherein the processing and sensing unit includes a current sensor for sensing current in the associated lamp.

44. The lamp monitoring and control unit of claim 41, wherein the processing and sensing unit includes a current sensor for sensing current in the associated lamp.

60. The lamp monitoring and control unit of claim 41, wherein the wireless transmitter transmits the monitoring data in free space.

61. The lamp monitoring and control unit of claim 41, wherein the broadcast comprises a point to point transmission.