Networked device with power usage estimation
View Patent ↗Various methods and apparatus report energy usage status by a networked device. In response to a request, a set of power usage data is retrieved from a non-volatile memory located within the networked device, the power usage data having been previously stored in the non-volatile memory in advance of positioning the networked device for normal use. The set of power usage data includes information related to energy usage of the networked device. The networked device calculates a best estimate of the energy usage status of the networked device based on the set of power usage data retrieved from the non-volatile memory, without measuring electrical parameters of a power source of the networked device during normal use. The best estimate of the energy usage status by the networked device is then sent over the network as a reply to the energy usage status request.
1. A method of reporting energy usage status by a networked device comprising:
receiving a request for energy usage status from a network;
retrieving a set of power usage data from a non-volatile memory located within the networked device, the set of power usage data having been previously stored in the non-volatile memory in advance of positioning the networked device for normal use, wherein the set of power usage data comprises information related to energy usage of the networked device;
calculating, by the networked device, a best estimate of the energy usage status of the networked device based on the set of power usage data retrieved from the non-volatile memory without measuring electrical parameters of a power source of the networked device during normal use; and
sending the best estimate of the energy usage status by the networked device over the network as a reply to the energy usage status request.
2. The method of reporting energy usage status by the networked device of claim 1 wherein the networked device is a networked light bulb.
3. The method of reporting energy usage status by the networked device of claim 1 further comprising:
testing the networked device to determine an amount of power used by the networked device for at least one operating condition of the networked device;
determining the set of power usage data based on the testing of the networked device; and
storing the set of power usage data in the non-volatile memory located within the networked device for later retrieval;
wherein said testing, determining and storing occur in advance of positioning the networked device for normal use.
4. The method of reporting energy usage status by the networked device of claim 1 further comprising:
creating the set of power usage data based on data from similar networked devices; and
storing the set of power usage data in the non-volatile memory located within the networked device for later retrieval;
wherein said creating and storing occur in advance of positioning the networked device for normal use.
5. The method of reporting energy usage status by the networked device of claim 1 , the set of power usage data comprising only one power usage data point.
6. The method of reporting energy usage status by the networked device of claim 1 , the set of power usage data comprising two or more power usage data points corresponding to different operating conditions of the networked device.
7. The method of reporting energy usage status by the networked device of claim 6 further comprising:
maintaining a log of time spent in the different operating conditions by the networked device, without measuring the electrical parameters of the power source of the networked device; and
calculating the best estimate of the energy usage status based on both the set of power usage data retrieved from the non-volatile memory and the log of time spent in the different operating conditions by the networked device.
8. The method of reporting energy usage status by the networked device of claim 6 wherein the networked device is a networked light bulb and the different operating conditions of the networked device comprise different brightness levels of the networked light bulb.
9. The method of reporting energy usage status by the networked device of claim 8 further comprising:
ascertaining a current brightness level of the networked light bulb by querying an LED driver, the LED driver controlling at least one LED, the at least one LED used to provide light from the networked light bulb; and
using the current brightness level of the networked light bulb in conjunction with the set of power usage data retrieved from the non-volatile memory to calculate the best estimate of the energy usage status.
10. The method of reporting energy usage status by the networked device of claim 6 wherein the different operating conditions of the networked device comprise at least a standby condition and a fully operational condition.
11. The method of reporting energy usage status by the networked device of claim 6 further comprising:
ascertaining a current operating condition of the networked device; and
interpolating between two power usage points to calculate the best estimate of the energy usage status, the two power usage points taken from the set of power usage data based on the different operating conditions associated with the two power usage points and the current operating condition of the networked device.
12. A networked device comprising:
means for connecting to a network;
means for storing a set of power usage data; and
means for calculating a best estimate of the energy usage status, of the networked device, based on the set of power usage data; wherein
the set of power usage data comprises information related to energy usage of the networked device, and is pre-stored in advance of positioning the networked device for normal use;
a energy usage status request is received from the network;
the best estimate is calculated without measuring electrical parameters of a power source of the networked device during normal use; and
the best estimate of the energy usage status is sent in a response message over the network.
13. The networked device of claim 12 wherein the networked device is a networked light bulb.
14. The networked device of claim 12 wherein the set of power usage data is based on measurements taken of actual power used by the networked device before the networked device is positioned for normal use.
15. The networked device of claim 12 wherein the set of power usage data is based on power used by similar networked devices.
16. The networked device of claim 12 , the set of power usage data comprising only one power usage data point.
17. The networked device of claim 12 , the set of power usage data comprising two or more power usage data points based on different operating conditions of the networked device.
18. The networked device of claim 17 further comprising:
means for maintaining a log of time spent in the different operating conditions by the networked device, without measuring the electrical parameters of the power source of the networked device; wherein
the means for calculating the best estimate of the energy usage status utilizes both the set of power usage data and the log of time spent in the different operating conditions by the networked device.
19. The networked device of claim 17 wherein the networked device is a networked light bulb and the different operating conditions of the networked device comprise different brightness levels of the networked light bulb.
20. The networked device of claim 19 wherein the networked light bulb utilizes at least one LED as a source of light; and
the means for calculating the best estimate of the energy usage status ascertains a current brightness level of the networked light bulb by querying a means for driving the at least one LED, and uses the current brightness level of the networked light bulb in conjunction with the set of power usage data to calculate the best estimate of the energy usage status.
21. The networked device of claim 17 wherein the different operating conditions of the networked device comprise at least a standby condition and a fully operational condition.
22. The networked device of claim 17 further comprising:
means to ascertain a current operating condition of the networked device; wherein
the means for calculating the best estimate of the energy usage status interpolates between two power usage points taken from the set of power usage data based on the different operating conditions associates with the two power usage points and the current operating condition of the networked device.
23. A networked light bulb comprising:
a light emitting apparatus;
a controller;
a non-volatile memory communicatively coupled to the controller, a set of power usage data comprising information related to energy usage of the networked light bulb pre-stored in the non-volatile memory in advance of positioning the networked light bulb for normal use; and
a network adapter communicatively coupled to the controller; wherein
the network adapter receives an energy usage status request from the network and communicates it to the controller;
the controller retrieves the set of power usage data from the non-volatile memory, calculates a best estimate of the energy usage status of the networked light bulb based on the set of power usage data, without measuring electrical parameters of a power source of the networked light bulb during normal use, and communicates the best estimate of the energy usage status to the network adapter; and
the network adapter sends a message over the network containing the best estimate of the energy usage status.
24. The networked light bulb of claim 23 in which the network adapter connects to a network utilizing radio frequency communication.
25. The networked light bulb of claim 23 in which at least the controller and the network adapter are integrated on a single integrated circuit.
26. The networked light bulb of claim 23 wherein the set of power usage data is based on measurements taken of actual power used by the networked light bulb in advance of positioning the networked light bulb for normal use.
27. The networked light bulb of claim 23 wherein the set of power usage data is based on power used by similar networked light bulbs.
28. The networked light bulb of claim 23 , the set of power usage data comprising only one power usage data point.
29. The networked light bulb of claim 23 , the set of power usage data comprising two or more power usage data points based at different brightness levels of the networked light bulb.
30. The networked light bulb of claim 29 , the light emitting apparatus comprising at least one LED; wherein
the controller queries an LED driver to determine a current brightness level of the at least one LED, and uses the current brightness level of the at least one LED in conjunction with the set of power usage data to calculate the best estimate of the energy usage status.
31. The networked light bulb of claim 29 wherein the controller:
maintains a log of time spent by the networked light bulb at the different brightness levels, without measuring the electrical parameters of the power source of the networked light bulb; and
calculates the best estimate energy usage status based on both the set of power usage data and the log of time spent by the networked light bulb at the different levels.
32. The networked light bulb of claim 29 wherein the different brightness points of the networked light bulb comprise at least a dark brightness level and a full brightness level.
33. The networked light bulb of claim 29 wherein the controller:
ascertains a current brightness level of the networked light bulb; and
calculates the best estimate of the energy usage status by interpolating between two power usage points of the set of power usage data using the brightness levels associated with the two power usage points and the current brightness level of the networked light bulb.