FRACTIONAL SAMPLES TO IMPROVE METERING AND INSTRUMENTATION
First Claim
1. A method of determining parameters associated with a power line signal, the method comprising:
- collecting a last sample during a last sample period, wherein the last sample period is associated with a present accumulation interval and a subsequent accumulation interval;
detecting a transition during the last sample period from the present accumulation interval to the subsequent accumulation interval; and
determining a present portion of the last sample period that belongs to the present accumulation interval.
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Accused Products
Abstract
Methods and devices to determine values relating to metering a power line signal. A power line signal may be sampled by defining accumulation intervals associated with the power line signal. An accumulation interval may comprise sample periods. Samples are taken during sample periods. Values associated with the samples are determined for each sample period. A sample period may be associated with one or more accumulation intervals. When a sample period belongs to one accumulation interval, the sample period may be allocated to the one accumulation interval. When a sample period is associated with more than one accumulation interval, portions of the sample period may be allocated to the accumulation intervals to which the portions belong. Values determined for a sample period may be allocated to one or more accumulation intervals by allocating the values in relation to the allocation of the sample periods.
52 Citations
21 Claims
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1. A method of determining parameters associated with a power line signal, the method comprising:
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collecting a last sample during a last sample period, wherein the last sample period is associated with a present accumulation interval and a subsequent accumulation interval; detecting a transition during the last sample period from the present accumulation interval to the subsequent accumulation interval; and determining a present portion of the last sample period that belongs to the present accumulation interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electrical energy meter comprising:
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a microcontroller, wherein the microcontroller provides instructions; and a digital signal processor, wherein the digital signal processor receives the instructions, and wherein the digital signal processor comprises at least one subsystem that; defines an accumulation interval associated with a power line signal; collects a last sample during a last sample period, wherein the last sample period is associated with a present accumulation interval and a subsequent accumulation interval; detects a transition during the last sample period from the present accumulation interval to the subsequent accumulation interval; and determines a present portion of the last sample period that belongs to the present accumulation interval. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification