Determining information about devices in a building using different sets of features
First Claim
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 to power a plurality of devices in the building;
computing a first feature of the electrical signal 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 of the electrical signal 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 of the electrical signal and prior to the second end time, a state change of a first device in the building;
after the second end time, using the first feature of the electrical signal and the second feature of the electrical signal to improve an accuracy of the identification by, (i) confirming the state chance of the first device in the building, or (ii) changing the identification of the state change of the first device to an identification of a state change of a second device in the building.
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Accused Products
Abstract
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.
116 Citations
20 Claims
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1. A computer-implemented method for determining a state change of a device in a building, the method comprising:
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receiving an electrical signal, wherein the electrical signal is used to power a plurality of devices in the building; computing a first feature of the electrical signal 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 of the electrical signal 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 of the electrical signal and prior to the second end time, a state change of a first device in the building; after the second end time, using the first feature of the electrical signal and the second feature of the electrical signal to improve an accuracy of the identification by, (i) confirming the state chance of the first device in the building, or (ii) changing the identification of the state change of the first device to an identification of a state change of a second device in the building. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for determining a state change of device in a building, the device comprising:
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at least one processor; at least one memory storing processor executable instructions that, when executed by the at least one processor, cause the at least one processor to; receive an electrical signal, wherein the electrical signal corresponds to electrical power usage of a plurality of devices; compute a first feature of the electrical signal using a first portion of the electrical signal, wherein the first portion comprises the first time; compute a second feature of the electrical signal using a second portion of the electrical signal, wherein the second portion comprises the first time and wherein an end time of the second portion is later than an end time of the first portion; identify, using the first feature of the electrical signal and prior to the end time of the second portion, a state change of a first device; after the end time of the second portion, using the first feature of the electrical signal and the second feature of the electrical signal to improve an accuracy of the identification by, (i) confirming the state change of the first device, or (ii) changing the identification of the state change of the first device to an identification of a state change of a second device. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. One or more non-transitory computer-readable media comprising computer executable instructions that, when executed, cause at least one processor to perform actions comprising:
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receiving an electrical signal, wherein the electrical signal corresponds to electrical power usage of a plurality of devices; computing a first feature of the electrical signal using a first portion of the electrical signal, wherein the first portion comprises the first time; computing a second feature of the electrical signal using a second portion of the electrical signal, wherein the second portion comprises the first time and wherein an end time of the second portion is later than an end time or the first portion; identifying, using the first feature of the electrical signal and prior to the end time of the second portion, a state chance of a first device; after the end time of the second portion, using the first feature of the electrical signal and the second feature of the electrical signal to improve an accuracy of the identification by, (i) confirming the state chance of the first device, or (ii) changing the identification of the state change of the first device to an identification of a state change or a second device. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification