Determining information about devices in a building using different sets of features
First Claim
1. A method for determining state changes of devices in a building, the method performed by a monitoring device in the building, the method comprising:
- receiving an electrical signal, wherein the electrical signal corresponds to electrical usage of a plurality of devices, and wherein the electrical signal comprises at least one of voltage signal, a current signal, a power signal, or a reactive power signal;
identifying an electrical event in the electrical signal, wherein the electrical event corresponds to a first time;
computing a first feature using a first portion of the electrical signal, wherein the first portion comprises the first time;
computing a second feature 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;
performing first processing comprising;
computing a first score using the first feature and a model, wherein the model corresponds to one or more devices and a state change of the one or more devices and wherein computing the first score does not use the second feature, andselecting, using the first score, a first device and a first state change; and
performing second processing comprising;
computing a second score using the first feature, the second feature, and the model, andselecting, using the second score, (i) the first device and the first state change, or (ii) a second device and a second state change.
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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.
126 Citations
21 Claims
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1. A method for determining state changes of devices in a building, the method performed by a monitoring device in the building, the method comprising:
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receiving an electrical signal, wherein the electrical signal corresponds to electrical usage of a plurality of devices, and wherein the electrical signal comprises at least one of voltage signal, a current signal, a power signal, or a reactive power signal; identifying an electrical event in the electrical signal, wherein the electrical event corresponds to a first time; computing a first feature using a first portion of the electrical signal, wherein the first portion comprises the first time; computing a second feature 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; performing first processing comprising; computing a first score using the first feature and a model, wherein the model corresponds to one or more devices and a state change of the one or more devices and wherein computing the first score does not use the second feature, and selecting, using the first score, a first device and a first state change; and performing second processing comprising; computing a second score using the first feature, the second feature, and the model, and selecting, using the second score, (i) the first device and the first state change, or (ii) a second device and a second state change. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A monitoring device for determining state changes of devices 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 usage of a plurality of devices; identify an electrical event in the electrical signal, wherein the electrical event corresponds to a first time; compute a first feature using a first portion of the electrical signal, wherein the first portion comprises the first time; compute a second feature 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; perform first processing comprising; computing a first score using the first feature, wherein computing the first score does not use the second feature, and selecting, using the first score, a first device and a first state change; and perform second processing comprising; computing a second score using the first feature and the second feature, and selecting, using the second score, (i) the first device and the first state change, or (ii) a second device and a second state change. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer-readable medium 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 usage of a plurality of devices; identifying an electrical event in the electrical signal, wherein the electrical event corresponds to a first time; computing a first feature using a first portion of the electrical signal, wherein the first portion comprises the first time; computing a second feature 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; performing first processing comprising; computing a first score using the first feature, wherein computing the first score does not use the second feature, and selecting, using the first score, a first device and a first state change; and performing second processing comprising; computing a second score using the first feature and the second feature, and selecting, using the second score, (i) the first device and the first state change, or (ii) a second device and a second state change. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification