PHOTOELECTRIC CONTROLLER FOR ELECTRIC STREET LIGHTING

• US 20080191897A1
• Filed: 03/21/2008
• Published: 08/14/2008
• Est. Priority Date: 11/16/2005
• Status: Active Grant

• Current Assignee: Marmon Utility, LLC (Berkshire Hathaway Incorporated)
• Original Assignee: Marmon Utility, LLC (Berkshire Hathaway Incorporated)
• Inventors: MCCOLLOUGH, NORMAN D.
• Granted Patent: US 8,013,718 B2
• Time in Patent Office: Days
• US Class Current: 340/3.1
• CPC Class Codes: G08B 21/12 responsive to undesired emission of substances, e.g. pollution alarms
• CPC Class Codes: G08B 25/009 Signalling of the alarm condition to a substation whose identity is signalled to a central station, e.g. relaying alarm signals in order to extend communication range
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence
• CPC Class Codes: H05B 47/11 by determining the brightness or colour temperature of ambient light
• CPC Class Codes: H05B 47/19 via wireless transmission
• CPC Class Codes: H05B 47/22 with communication between the lamps and a central unit
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

An electric street light controller apparatus and monitoring method allows automatic street light turn-on and turn-off characteristics to be field programmable using RFID technology, lamp current magnitude recording, auxiliary sensor input, diagnostic alarming and data storage for later retrieval in a remote electric street lighting monitoring system. The apparatus and method includes, from a remotely located exciter apparatus using an antenna to transmit a specific frequency and code key to the antenna of an electric street light control and monitoring apparatus associated with the electric street light allowing remote wireless field programming of turn-on fight levels, turn-off light levels, rate of change of light levels, specific turn-on, turn-off, and turn back on sequences during dark hours, and specific remote wireless sensors or internal sensor inputs useful for radiological, biological, chemical, or environmental sensing and alarming. Additionally the method and apparatus includes a method of providing automatic diagnostics for the street lamp bulb, starter and self diagnostics of the controller itself.

Claims

1. A method of wirelessly programming a streetlight controller and monitor, the method comprising:

providing a turn on foot-candle level parameter to the streetlight controller and monitor;

providing a turn off foot-candle level parameter to the streetlight controller and monitor;

providing a delay turn off time parameter to the streetlight controller and monitor; and

providing a pre-set turn oil time parameter to the streetlight controller and monitor.

2. The method of claim 1 wherein the foot-candle level parameters and time parameters are provided by being transmitted to the streetlight controller and monitor from an exciter.

3. The method of claim 1, wherein the streetlight controller and monitor has a non-volatile EEPROM memory, and the provided foot-candle level parameters and time parameters are stored in the non-volatile EEPROM memory.

4. The method of claim 1, wherein the pre-set turn on time parameter causes a streetlight to illuminate before the turn on foot-candle level parameter has been met.

5. The method of claim 1, wherein the pre-set turn on time parameter causes a streetlight to illuminate after the delay turn off time parameter has been met and before the turn off foot-candle level parameter has been met.

6. A method of wirelessly programming a streetlight controller and monitor, the method comprising:

providing a pre-set turn on time parameter to the streetlight controller and monitor, wherein the provided pre-set turn on time parameter is automatically adjusted based upon a determined time correction factor.

7. The method of claim 6, wherein the pre-set turn on time parameter results in the illumination of a streetlight at a desired amount of time before dark or at a desired amount of time before day.

8. The method of claim 6, wherein the time correction factor is determined by a correction factor determination method comprising the steps of:

1) periodically determining actual sunlight levels within at least one 24 hour cycle;

2) computing a predicted sunlight level for at least one time of day in a second 24 hour cycle;

3) measuring an actual sunlight level for the at least one time of day in the second 24 hour cycle;

4) determining a time difference between the predicted sunlight level and the actual sunlight level; and

5) determining the time correction factor based upon the time difference.

9. The method of claim 8, wherein the actual sunlight levels are determined by at least a photo sensor and a microprocessor control unit.

10. The method of claim 9, wherein the photo sensor measures sunlight levels, and the measured sunlight levels are converted to an electrical representation of the sunlight level.

11. The method of claim 10, wherein the electrical representation of the sunlight level corresponds to foot-candles of illumination.

12. The method of claim 9, wherein the microprocessor control unit has an analog-to-digital converter that converts an electrical representation of the sunlight level to digital light level data.

13. The method of claim 12, wherein the digital light level data corresponds to foot-candles of illumination.

14. The method of claim 13, wherein the digital light level data is stored in RAM.

15. The method of claim 8, wherein the streetlight controller and monitor uses stored digital light level data to compute the predicted sunlight level for at least one time of day in the second 24 hour cycle.

16. The method of claim 8, wherein the light level correction factor is stored in EEPROM.

17. The method of claim 6, wherein the time correction factor is determined by a correction factor determination method comprising the steps of:

1) storing an expected sunlight level value for a time of day;

2) measuring an actual sunlight level for the time of day;

3) determining a time difference between the expected sunlight level and the actual sunlight level; and

4) determining the time correction factor based upon the time difference.

18. The method of claim 17, wherein the expected sunlight level value is programmed into the streetlight controller and monitor.

19. The method of claim 17, wherein the expected sunlight level is predicted by the streetlight controller and monitor based upon previously measured actual sunlight levels.