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公开(公告)号：US11736681B2
公开(公告)日：2023-08-22
申请号：US17872799
申请日：2022-07-25
IPC分类号： H04H60/32 , H04N5/64 , H04N17/00 , G01R35/00 , H04N21/442
CPC分类号： H04N17/004 , G01R35/005 , H04H60/32 , H04N5/64 , G09G2330/021 , G09G2370/04 , H04N21/44213
摘要： Methods and apparatus are disclosed to determine a power state of a device. An example method includes determining respective counts for a plurality of measurements during a calibration period, the measurements indicative of an amount of power drawn by the device, determining a first threshold and a second threshold based on at least one of the counts, the first threshold determined using most frequently logged measurement values, the most frequently logged measurement values based on counts performed after expiration of the calibration period, comparing a measurement to the first threshold and to the second threshold, and outputting a positive indication when the measurement is within an acceptable difference range, the acceptable difference range based on the amount of power drawn by the device.
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公开(公告)号：US10757403B2
公开(公告)日：2020-08-25
申请号：US16272804
申请日：2019-02-11
IPC分类号： H04H60/32 , G01R35/00 , H04N5/64 , H04N17/00 , H04N21/442
摘要： Methods and apparatus are disclosed to determine a power state of a device. An example apparatus includes a chart generator to determine respective counts for a plurality of measurements during a calibration period, the measurements indicative of an amount of power drawn by the device, the counts indicating respective numbers of times the respective measurements were detected. The example apparatus also includes a calculator to identify a first threshold based on at least one of the counts, and determine a second threshold. The example apparatus also includes a comparator to compare a measurement to the first threshold and to the second threshold, and a state detector to store an indication that the device is in an indeterminate state if the measurement is greater than the first threshold and less than the second threshold.
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公开(公告)号：US20190174126A1
公开(公告)日：2019-06-06
申请号：US16272804
申请日：2019-02-11
摘要： Methods and apparatus are disclosed to determine a power state of a device. An example apparatus includes a chart generator to determine respective counts for a plurality of measurements during a calibration period, the measurements indicative of an amount of power drawn by the device, the counts indicating respective numbers of times the respective measurements were detected. The example apparatus also includes a calculator to identify a first threshold based on at least one of the counts, and determine a second threshold. The example apparatus also includes a comparator to compare a measurement to the first threshold and to the second threshold, and a state detector to store an indication that the device is in an indeterminate state if the measurement is greater than the first threshold and less than the second threshold.
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公开(公告)号：US20220360765A1
公开(公告)日：2022-11-10
申请号：US17872799
申请日：2022-07-25
摘要： Methods and apparatus are disclosed to determine a power state of a device. An example method includes determining respective counts for a plurality of measurements during a calibration period, the measurements indicative of an amount of power drawn by the device, determining a first threshold and a second threshold based on at least one of the counts, the first threshold determined using most frequently logged measurement values, the most frequently logged measurement values based on counts performed after expiration of the calibration period, comparing a measurement to the first threshold and to the second threshold, and outputting a positive indication when the measurement is within an acceptable difference range, the acceptable difference range based on the amount of power drawn by the device.
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公开(公告)号：US10205939B2
公开(公告)日：2019-02-12
申请号：US15633394
申请日：2017-06-26
IPC分类号： H04N5/64 , G01R35/00 , H04H60/32 , H04N17/00 , H04N21/442
摘要： Methods and apparatus to determine a power state of an information presentation device. The method includes measuring power drawn by the information presentation device during a calibration period to generate a log of measurement values, determining, by executing an instruction with a processor, respective counts indicating respective numbers of times respective different ones of the measurement values were detected during the calibration period, and determining, by executing an instruction with the processor, a first threshold based on at least one of the counts. The method also includes determining whether the presentation device is in an ON state based on a comparison of measured power drawn by the information presentation device after the calibration period to the first threshold.
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公开(公告)号：US20170295364A1
公开(公告)日：2017-10-12
申请号：US15633394
申请日：2017-06-26
CPC分类号： H04N17/004 , G01R35/005 , G09G2330/021 , G09G2370/04 , H04H60/32 , H04N5/64 , H04N21/44213
摘要： Methods and apparatus to determine a power state of an information presentation device. The method includes measuring power drawn by the information presentation device during a calibration period to generate a log of measurement values, determining, by executing an instruction with a processor, respective counts indicating respective numbers of times respective different ones of the measurement values were detected during the calibration period, and determining, by executing an instruction with the processor, a first threshold based on at least one of the counts. The method also includes determining whether the presentation device is in an ON state based on a comparison of measured power drawn by the information presentation device after the calibration period to the first threshold.
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