Apparatus for monitoring lamp system status

• US 5,487,088 A
• Filed: 10/28/1993
• Issued: 01/23/1996
• Est. Priority Date: 10/28/1993
• Status: Expired due to Fees

• Current Assignee: Infilco Degremont Incorporated (Veolia Environnement SA)
• Original Assignee: Infilco Degremont Incorporated (Veolia Environnement SA)
• Inventors: Weltz, Richard, Milius, David J.
• Primary Examiner(s): Pascal, Robert J.
• Assistant Examiner(s): Philogene, Haissa
• Application Number:
  US08/144,637
• Time in Patent Office: 817 Days
• Field of Search: 315/129, 315/86, 315/276, 315/277, 315/DIG. 7, 315/254, 315/312, 315/324, 315/130, 315/241 P, 315/241 S, 315/209 R
• US Class Current: 315/276
• CPC Class Codes: H05B 41/285 Arrangements for protecting lamps or circuits against abnormal operating conditions
• CPC Class Codes: H05B 47/22 with communication between the lamps and a central unit
• CPC Class Codes: Y02B 20/00 Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
• CPC Class Codes: Y10S 315/07 Starting and control circuits for gas discharge lamp using transistors

Abstract

A lamp system including an alternating current power source for supplying a signal voltage, an input transformer having primary and secondary windings connected to the power source for increasing signal voltage, a signal rectifier connected to the secondary winding for creating a direct current signal from the increased signal voltage, a signal oscillator connected to the signal rectifier for creating a high-frequency signal from the direct current signal, one or more ballasts connected to the signal oscillator to create high-voltage high-frequency signals from the direct current signal, one or more lamps driven by the high-voltage high-frequency signal from the ballasts, a sense winding on an output side of each of the ballasts for inducing alternating current signals, an apparatus for receiving and processing the alternating current signals, and an apparatus for displaying the processed alternating current signals.

Claims

1. Ballast monitoring apparatus for a lamp system having one or more lamps and one or more ballasts connected to said lamps comprising:

a sense winding contained on an output side of said ballasts for inducing a ballast status signal;

ballast monitoring means for receiving and processing said ballast status signal; and

means for displaying said processed ballast status signal.

2. The apparatus defined in claim 1 wherein the means for displaying said processed ballast status signal is an AC current meter.

3. The apparatus defined in claim 1 wherein the means for displaying said processed ballast status signal is a DC current meter.

4. The apparatus of claim 3 wherein said means for receiving and processing said ballast status signal is a rectifier in series with said DC current meter.

5. The apparatus defined in claim 1 wherein the means for displaying said processed ballast status signal is a computer.

6. The apparatus of claim 5 wherein the means for receiving and processing said ballast status signal is a rectifier in series with a first resistance which is in series with a second resistance, said second resistance being in parallel with said computer.

7. The apparatus of claim 5 wherein the means for receiving and processing said ballast status signal is a rectifier in series with a first resistance which is in series with a second resistance, said second resistance being in parallel with the input of a multiplexer, the output of said multiplexer being connected with said computer.

8. The apparatus defined in claim 1 wherein the means for displaying said processed ballast status signal is a programmable logic controller.

9. The apparatus of claim 8 wherein the means for receiving and processing said ballast status signal is a rectifier in series with a first resistance which is in series with a second resistance, said second resistance being in parallel with said programmable logic controller.

10. The apparatus defined in claim 1 wherein the means for displaying said processed ballast status signal is an annunciator panel.

11. The apparatus of claim 10 wherein the means for receiving and processing said ballast status signal is a rectifier in series with a first resistance which is in series with a second resistance, said second resistance being in parallel with said annunciator panel.

12. The apparatus defined in claim 1 wherein the means for displaying said processed ballast status signal is a switch.

13. The apparatus of claim 12 wherein the means for receiving and processing said ballast status signal is a relay connected to said switch and connected to an output of a signal amplifier, an input of said signal amplifier being connected to said sense winding.

17. The lamp system of claim 1.4 wherein the means for displaying said processed ballast status signal is a computer.

18. The lamp system of claim 17 wherein the means for receiving and processing said ballast status signal is a rectifier in series with a first resistance which is in series with a second resistance, said second resistance being in parallel with said computer.

19. The lamp system of claim 17 wherein the means for receiving and processing said ballast status signal is a rectifier in series with a first resistance which is in series with a second resistance, said second resistance being parallel with the input of a multiplexer, the output of said multiplexer being connected with said computer.

14. A lamp system capable of monitoring ballasts comprising:

an alternating current power source for supplying a signal voltage,

an input transformer having primary and secondary windings connected to said power source for increasing said signal voltage;

a signal rectifier connected to said secondary winding for creating a direct current signal from said increased signal voltage;

a signal oscillator connected to said signal rectifier for creating a high-frequency signal from said direct current signal;

one or more ballasts connected to said signal oscillator to create high-voltage high-frequency signals from said direct current signal;

one or more lamps driven by said high-voltage high-frequency signal from said ballasts;

a sense winding on an output side of each of said ballasts for inducing ballast status signals;

ballast monitoring means for receiving and processing said ballast status signals; and

means for displaying said processed ballast status signals.

15. The lamp system defined in claim 14.wherein the lamps are selected from the group consisting of fluorescent, mercury vapor discharge and sodium vapor discharge.

16. The lamp system defined in claim 14 wherein said fluorescent lamps are ultraviolet radiation producing.

20. The lamp system of claim 14 wherein the means for displaying said processed ballast status signal is a programmable logic controller.

21. The lamp system of claim 20 wherein the means for receiving and processing said ballast status signal is a rectifier in series with a first resistance which is in series with a second resistance, said second resistance being in parallel with said programmable logic controller.

22. An apparatus for monitoring a lamp system having one or more lamps comprising:

one or more ballasts connected to said lamps;

a sense winding contained within said ballast for inducing an alternating current signal;

means for receiving and processing said alternating current signal including a rectifier in series with a first resistance which is in series with a second resistance; and

a computer for displaying said processed alternating current signal, said second resistance being in parallel with said computer.

23. The apparatus of claim 22 wherein said means for receiving and processing further comprises a multiplexer in parallel with said second resistance, the output of said multiplexer being connected with said computer.

24. An apparatus for monitoring a lamp system having one or more lamps comprising:

one or more ballasts connected to said lamps;

a sense winding contained within said ballast for inducing an alternating current signal;

means for receiving and processing said alternating current signal including a rectifier in series with a first resistance which is in series with a second resistance; and

a programmable logic controller for displaying said processed alternating current signal, said second resistance being in parallel with said programmable logic controller.

25. An apparatus for monitoring a lamp system having one or more lamps comprising:

one or more ballasts connected to said lamps;

a sense winding contained within said ballast for inducing an alternating current signal;

means for receiving and processing said alternating current signal including a rectifier in series with a first resistance which is in series with a second resistance; and

an annunciator panel for displaying said processed alternating current signal, said second resistance being in parallel with said annunciator panel.

26. An apparatus for monitoring a lamp system having one or more lamps comprising:

one or more ballasts connected to said lamps;

a sense winding contained within said ballast for inducing an alternating current signal;

means for receiving and processing said alternating current signal including a relay; and

a switch for displaying said processed alternating current signal, said relay connected to said switch and connected to an output of a signal amplifier, an input of said signal amplifier being connected to said sense winding.

27. A lamp system comprising:

an alternating current power source for supplying a signal voltage;

an input transformer having a primary and secondary winding connected to said power source for increasing said signal voltage;

a signal rectifier connected to said secondary winding for creating a direct current signal from said increased signal voltage;

a signal oscillator connected to said signal rectifier for creating a high-frequency signal from said direct current signal;

one or more ballasts connected to said signal oscillator to create high-voltage, high-frequency signals from said direct current signal;

one or more lamps driven by said high-voltage, high-frequency signal from said ballast;

a sense winding on the output side of each of said ballasts for inducing alternating current signals;

means for receiving and processing said alternating current signal including a rectifier in series with a first resistance which is in series with a second resistance; and

a computer for displaying said processed alternating current signal, the computer being in parallel to the second resistance.

28. The lamp system of claim 27 wherein said means for receiving and processing further comprises a multiplexer parallel with said second resistance, the output of said multiplexer being connected with said computer.

29. A lamp system comprising:

an alternating current power source for supplying a signal voltage;

an input transformer having a primary and secondary winding connected to said power source for increasing said signal voltage;

a signal rectifier connected to said secondary winding for creating a direct current signal from said increased signal voltage;

a signal oscillator connected to said signal rectifier for creating a high-frequency signal from said direct current signal;

one or more ballasts connected to said signal oscillator to create high-voltage, high-frequency signals from said direct current signal;

one or more lamps driven by said high-voltage, high-frequency signal from said ballast;

a sense winding on the output side of each of said ballasts for inducing alternating current signals;

means for receiving and processing said alternating current signal including a rectifier in series with a first resistance which is in series with a second resistance; and

a programmable logic controller for displaying said processed alternating current signal, the programmable logic controller being in parallel with the second resistance.