Method and Apparatus for Distributed Lighting Control

• US 20120194352A1
• Filed: 01/27/2012
• Published: 08/02/2012
• Est. Priority Date: 01/28/2011
• Status: Active Grant

• Current Assignee: Sensus USA Incorporated (Xylem, Inc.)
• Original Assignee: Sensus USA Incorporated (Xylem, Inc.)
• Inventors: Ellis, Todd, Atkins, Christopher, Cantrell, Bobby
• Granted Patent: US 8,860,561 B2
• Time in Patent Office: Days
• US Class Current: 340/907
• CPC Class Codes: H05B 47/19 via wireless transmission
• CPC Class Codes: H05B 47/22 with communication between the lamps and a central unit

Abstract

In one aspect, the present invention provides control for a distributed lighting network, for selectively reducing an aggregate electrical load of the distributed lighting network according to a defined lighting reduction pattern. Among the several advantages of the provided control is the ability to define via the pattern which lamps are involved in load shedding, and how they are controlled to shed load. In another aspect, the present invention provides control for a distributed lighting network, for visibly signaling persons within sight of one or more lamps within the distributed lighting network. Among the several advantages of the provided control is the ability to provide emergency or other public safety signaling to persons that might not otherwise be alerted to an existing or impending danger.

Claims

1. A lighting control server configured to control a distributed lighting system comprising a plurality of physically distributed lamps, each lamp controllable through a wireless lamp control module, said lighting control server comprising:

a communication interface configured to communicatively couple the lighting control server to a regional network interface (RNI) that in turn communicatively couples to a radio network providing two-way radio links with the lamp modules; and

a control circuit operatively associated with the communication interface and configured to selectively reduce an aggregate electrical load of the distributed lighting system based on being configured to;

determine a set of lamps within the distributed lighting system to place into a reduced-consumption state according to a defined lighting reduction pattern; and

send lighting control commands to the wireless lamp control modules associated with said set of lamps, to effectuate the defined lighting reduction pattern in said distributed lighting system.

2. The lighting control server of claim 1, wherein said control circuit is further configured to selectively reduce the aggregate electrical load of the distributed lighting system based on being configured to implement said reduction responsive to receiving control signaling indicating that such reduction is desired.

3. The lighting control server of claim 1, wherein said control circuit is further configured to selectively reduce the aggregate electrical load of the distributed lighting system based on being configured to receive electrical load data for an electrical supply system that powers said distributed lighting system and determine that said reduction is required based on one or more defined thresholds of electrical loading relative to a defined electrical supply capacity of said electrical supply system.

4. The lighting control server of claim 1, wherein said control circuit is configured to read one or more electronic files, the contents of which represent said defined lighting reduction pattern, and to determine said set of lamps from said contents.

5. The lighting control server of claim 4, wherein said contents of the one or more electronic files comprises a listing of lamp module identifiers, or comprises a defined lighting reduction value, the value of which indicates to said lighting control server the number of lamps within the distributed lighting system that are to be placed into the reduced-consumption state.

6. The lighting control server of claim 1, wherein a plurality of lighting reduction patterns are defined, each corresponding to a different geographical pattern of lighting reduction for all or part of the distributed lighting system, or corresponding to a different amount of electrical load reduction.

7. The lighting control server of claim 6, wherein said control circuit is configured to select a targeted one of the lighting reduction patterns, based upon receiving control signaling indicating the targeted lighting reduction pattern.

8. The lighting control server of claim 6, wherein said control circuit is configured to select a targeted one of the lighting reduction patterns, based upon receiving electrical load data for an electrical supply system that powers the distributed lighting system and determining which one of the lighting reduction patterns to effectuate in dependence on a current level of electrical loading on the electrical supply system, as indicated by the electrical load data, and one or more defined loading thresholds.

9. The lighting control server of claim 1, wherein said reduced-consumption state comprises an off state or a dimmed state, and wherein the control circuit is configured to generate said lighting control commands for the wireless lamp control modules associated with said set of lamps as at least one of an off command or a dim command.

10. The lighting control server of claim 1, wherein said reduced-consumption state comprises an off state, and wherein said control circuit is configured to generate further lighting control commands for at least one wireless lamp control module associated with at least one lamp that is adjacent to a lamp that is or will be turned off to effectuate said lighting reduction pattern, wherein said further lighting control commands are brighten commands, such that said one or more adjacent lamps partially compensate for the loss of illumination from the lamps that are turned off.

11. The lighting control server of claim 1, wherein said lighting reduction pattern comprises, for a least one geographically associated series of lamps within said distributed lighting system, a pattern of off or dimmed lamps within said at least one geographically associated series of lamps.

12. The lighting control server of claim 1, wherein said lighting reduction pattern is one of multiple defined lighting reduction patterns, where a first one of the defined lighting reduction patterns is characterized as being most aggressive in terms of lighting reduction, and remaining ones in the defined lighting reduction patterns are incrementally less aggressive, and wherein the control circuit is configured to apply different ones of the lighting reduction patterns to different sets of lamps within the distributed lighting system according to defined characterizations of the geographic areas corresponding to those different sets.

13. The lighting control server of claim 12, wherein said defined characterizations are stored numeric or text values, each such value mappable to one of said lighting reduction patterns, wherein said control circuit is configured to determine the particular lighting reduction pattern to apply to a particular set of lamps based on mapping the defined characterization stored for the geographical area of said particular set to the corresponding lighting reduction pattern.

14. A lighting control server configured to control a distributed lighting system comprising a plurality of physically distributed lamps, each lamp controllable through a wireless lamp control module, said lighting control server comprising:

a communication interface configured to communicatively couple the lighting control server to a regional network interface (RNI) that in turn communicatively couples to a radio network providing two-way radio links with the lamp modules; and

a control circuit operatively associated with the communication interface and configured to selectively control some or all of the lamps in the distributed lighting system to effectuate a defined signaling pattern, for visibly signaling any people in proximity of said some or all of the lamps, wherein said control circuit is configured to;

determine a set of lamps within the distributed lighting system to use for signaling; and

send lighting control commands to the wireless lamp control modules associated with said set of lamps, to effectuate the defined signaling pattern.

15. The lighting control server of claim 14, wherein said lighting control server selectively controls said some or all of the lamps in the distributed lighting system, to effectuate said defined signaling pattern, responsive to receiving an activation command from a network communication interface, or a user interface.

16. The lighting control server of claim 14, wherein said defined signaling pattern comprises a defined blinking pattern, and wherein said lighting control server is configured to send said lighting control commands to effectuate said defined signaling pattern based on being configured to send a timed series of on/off commands to the associated wireless lamp control modules according to a defined blink rate or duty cycle.

17. The lighting control server of claim 14, wherein said lighting control server includes a communication interface that communicatively couples said lighting control server to an emergency services network, and wherein said lighting control server is configured to selectively control said some or all of the lamps in said distributed lighting network, to effectuate said defined signaling pattern, based on receiving pattern activation signaling from said emergency services network.

18. The lighting control server of claim 14, wherein said lighting control server includes data storage containing geographic position information for the lamps within said distributed lighting system, and wherein said lighting control server is configured to receive geographic position or zone selection information and determine from said geographic position or zone information the particular lamps within said distributed lighting system to use for effectuating said defined signaling pattern.

19. The lighting control server of claim 14, wherein said defined signaling pattern is a chase pattern that indicates a direction of travel along one or more pedestrian or vehicle paths, and wherein said lighting control server is configured to send lighting control commands to those lamps running along said one or more pedestrian or vehicle paths, to implement a blinking sequence in those lamps according to said chase pattern.

20. A method of lighting control for a distributed lighting system comprising a plurality of physically distributed lamps, each lamp controllable through a wireless lamp control module, said method comprising:

selectively reducing an aggregate electrical load of the distributed lighting system by;

determining a set of lamps within the distributed lighting system to place into a reduced-consumption state according to a defined lighting reduction pattern; and

sending lighting control commands to the wireless lamp control modules associated with said set of lamps, to effectuate the defined lighting reduction pattern in said distributed lighting system.

21. A method of lighting control for a distributed lighting system comprising a plurality of physically distributed lamps, each lamp controllable through a wireless lamp control module, said method comprising:

selectively controlling some or all of the lamps in the distributed lighting system to effectuate a defined signaling pattern, for visibly signaling any people in proximity of said some or all of the lamps, by;

determining a set of lamps within the distributed lighting system to use for signaling; and

sending lighting control commands to the wireless lamp control modules associated with said set of lamps, to effectuate the defined signaling pattern.