DETERMINING INFORMATION ABOUT DEVICES IN A BUILDING USING DIFFERENT SETS OF FEATURES

摘要

Electrical usage of devices in a building may be monitored to provide information about the operation of the devices to a user. The information communicated to a user may include historical information and real-time information. In determining the real-time information, it may be desired to provide the information quickly and use a smaller set of features that are available more quickly. In determining the historical information, it may be desired to provide more accurate information and use a larger set of features. A device may compute real-time information and historical information using different sets of features.

主权项

1. A computer-implemented method for determining a state change of a device in a building, the method comprising:
receiving an electrical signal, wherein the electrical signal is used by a plurality of devices in the building; computing a first feature indicative of electrical usage of one of the plurality of devices using a first portion of the electrical signal, wherein the first portion comprises a first time and ends at a first end time; computing a second feature indicative of electrical usage of one of the plurality of devices using a second portion of the electrical signal, wherein the second portion comprises the first time and ends at a second end time, wherein the second end time is later than the first end time; identifying, using the first feature and prior to the second end time, a first state change of a first device in the building; after the second end time, using the first feature and the second feature to improve an accuracy of the identification by, (i) confirming the first state change of the first device in the building, or (ii) identifying a second state change of a second device in the building.