Light management system having networked intelligent luminaire managers with enhanced diagnostics capabilities
View Patent ↗A network operation center for a light management system having networked intelligent luminaire managers. A plurality of networked luminaire managers, each collocated with a respective luminaire, monitor the status of their respective luminaires. The luminaire managers include transmitters for transmitting status information about their respective luminaires and third-party devices to a network server. The network server forwards the received status information from the networked luminaire managers to a computer of an owner/operator of the plurality of luminaires and/or a third-party user. The luminaire managers communicate with each other, whereby they form a network.
1. An intelligent luminaire manager, comprising:
a voltage sensor for measuring a voltage provided to a luminaire;
a current senor for measuring a current provided to the luminaire;
a controller coupled to the voltage sensor and the current sensor; and
a luminaire diagnostic program stored in a memory of the controller,
wherein the luminaire diagnostic program calculates real power for the luminaire and apparent power for the luminaire and generates a lamp cycling message if the calculated real power divided by the calculated apparent power is less than a first threshold value.
2. The intelligent luminaire manager of claim 1 , wherein the lamp cycling message is generated only if a current measured by the current sensor is greater than a second threshold value.
3. The intelligent luminaire manager of claim 2 , wherein the lamp cycling message is generated if a change in the current is greater than a third threshold value.
4. The intelligent luminaire manager of claim 1 , wherein the luminaire diagnostic program generates a bad lamp message if the calculated real power continues to change during a specified period of time.
5. The intelligent luminaire manager of claim 1 , wherein the luminaire diagnostic program generates a bad fixture message if the calculated real power is less than a second threshold value.
6. The intelligent luminaire manager of claim 5 , wherein the luminaire diagnostic program generates the bad fixture message if a current measured by the current sensor is less than a third threshold value.
7. The intelligent luminaire manager of claim 1 , wherein the luminaire diagnostic program generates a predicted lamp failure message if the calculated real power is not changing after a first specified time.
8. The intelligent luminaire manager of claim 7 , wherein the luminaire diagnostic program generates the predicted lamp failure message if the calculated real power is changing after a second specified time.
9. The intelligent luminaire manager of claim 8 , wherein the luminaire diagnostic program generates the predicted lamp failure message if the calculated real power is less than a second threshold value after a third specified time.
10. The intelligent luminaire manager of claim 9 , wherein the luminaire diagnostic program generates the predicted lamp failure message if a DC component of a voltage measured by the voltage sensor is greater than a selected percentage of the voltage.
11. The intelligent luminaire manager of claim 9 , wherein the luminaire diagnostic program generates the predicted lamp failure message if a DC component of a current measured by the current sensor is greater than a selected percentage of the current.
12. A method for monitoring and diagnosing a luminaire, comprising:
measuring an AC voltage provided to a luminaire;
measuring an AC current provided to the luminaire;
calculating real power for the luminaire;
calculating apparent power for the luminaire; and
generating a lamp cycling message if calculated real power divided by calculated apparent power is less than a first threshold value.
13. The method of claim 12 , wherein the generating step comprises:
generating the lamp cycling message only if the measured current is greater than a second threshold value.
14. The method of claim 12 , further comprising:
generating a bad lamp message if the calculated real power changes during a specified period of time.
15. The method of claim 12 , further comprising:
generating a bad fixture message if the calculated real power is less than a second threshold value.
16. The method of claim 12 , further comprising:
generating a bad fixture message if the measured current is less than a second threshold value.
17. The method of claim 12 , further comprising:
generating a predicted lamp failure message if the calculated real power is not changing after a first specified time.
18. The method of claim 17 , further comprising:
generating the predicted lamp failure message if the calculated real power is changing after a second specified time.
19. The method of claim 18 , further comprising:
generating the predicted lamp failure message if the calculated real power is less than a third threshold value after a third specified time.
20. The method of claim 19 , further comprising:
generating the predicted lamp failure message if a DC component of the measured voltage is greater than a selected percentage of the measured voltage.
21. The method of claim 19 , further comprising:
generating the predicted lamp failure message if a DC component of the measured current is greater than a selected percentage of the measured current.
22. An intelligent luminaire manager, comprising:
a controller coupled to a voltage sensor and a current sensor;
a luminaire diagnostic program stored in a memory of the controller, wherein the luminaire diagnostic program calculates real power for a luminaire and apparent power for the luminaire, based on voltage and current measurements, and generates a lamp cycling message if the calculated real power divided by the calculated apparent power is less than a first threshold value; and
an enclosure that houses the controller, the enclosure having a three-prong plug for attaching to a streetlight fixture.
23. The intelligent luminaire manager of claim 22 , wherein the lamp cycling message is generated only if a current measured by the current sensor is greater than a second threshold value.
24. The intelligent luminaire manager of claim 22 , wherein the luminaire diagnostic program generates a bad lamp message if the calculated real power continues to change during a specified period of time.
25. The intelligent luminaire manager of claim 22 , wherein the luminaire diagnostic program generates a bad fixture message if the calculated real power is less than a second threshold value.
26. The intelligent luminaire manager of claim 22 , wherein the luminaire diagnostic program generates a bad fixture message if a current measured by the current sensor is less than a second threshold value.
27. The intelligent luminaire manager of claim 22 , wherein the luminaire diagnostic program generates a predicted lamp failure message if the calculated real power is not changing after a first specified time.
28. The intelligent luminaire manager of claim 27 , wherein the luminaire diagnostic program generates the predicted lamp failure message if the calculated real power is changing after a second specified time.
29. The intelligent luminaire manager of claim 28 , wherein the luminaire diagnostic program generates the predicted lamp failure message if the calculated real power is less than a second threshold value after a third specified time.