Apparatus and method for power disturbance analysis and dynamic adaptation of impulse memory storage size
AssigneeReliable Power Meters, Inc.
InventorsRobert E. Moore, Frederic W. Nitz, Michael A. Gipe
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Abstract
A power monitoring system with associated signal processing and storage capabilities. An input signal is sampled and the samples are compared to a threshold to identify an impulse. The system analyzes the length of each impulse to dynamically adapt a memory storage size to store a number of samples occurring during an impulse period. In a further embodiment, the input signal must remain below a second threshold for a fixed number of samples before storing of the samples is terminated.
Claims5
A method of storing impulses superimposed on an electrical power signal comprising in order:
- sampling the electrical power signal at an interval to obtain a sequence of samples;
- identifying an impulse superimposed on the electrical power signal from the sequence of samples according to when a first parameter value of a first sample exceeds a first predetermined threshold, indicating a beginning of the impulse;
- storing first sample and a plurality of subsequent samples in a digital electronic storage device, the plurality of subsequent samples following the first sample in time;
- comparing each of the plurality of subsequent samples to a second predetermined threshold to determine when a second parameter value of a second sample of the plurality of subsequent samples is equal to or less than the second predetermined threshold;
- thereafter
- terminating storage of the plurality of subsequent samples;
- and
- dynamically adapting an impulse storage memory size in the digital electronic storage device according to a duration of the impulse to minimize the impulse storage memory size.
A method of storing impulses superimposed on an electrical power signal comprising of:
- sampling the electrical power signal at an interval to obtain a sequence of samples;
- identifying an impulse superimposed on the electrical power signal from the sequence of samples according to when a first parameter value of a first sample exceeds a first predetermined threshold, indicating a beginning of the impulse, thereafter;
- storing the first sample and a plurality of subsequent samples in a digital electronic storage device, the plurality of subsequent samples following the first sample in time;
- comparing each of the plurality of subsequent samples to a second predetermined threshold to determine when a second parameter value of each of a selected number of sample in a series of samples is equal to or less than the second predetermined threshold;
- thereafter
- terminating storage of the plurality of subsequent samples;
- and
- dynamically adapting an impulse storage memory size in the digital electronic storage device according to a duration of the impulse to minimize the impulse storage size.
Dependencies are inferred from the claim text.