US 12,273,129 B2
Randomly jittered under-sampling and phase sampling for time-frequency and frequency analyses in AFCI, GFCI, metering, and load recognition and disaggregation applications
Joseph Hall, Rapid City, IA (US)
Assigned to Schneider Electric USA, Inc., Boston, MA (US)
Filed by Schneider Electric USA, Inc., Andover, MA (US)
Filed on Oct. 3, 2022, as Appl. No. 17/959,251.
Claims priority of provisional application 63/251,369, filed on Oct. 1, 2021.
Prior Publication US 2023/0104134 A1, Apr. 6, 2023
Int. Cl. H03M 1/12 (2006.01); H03M 3/00 (2006.01); H04L 9/08 (2006.01)
CPC H03M 3/498 (2013.01) [H03M 1/127 (2013.01); H03M 1/128 (2013.01); H04L 9/0869 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A system for analyzing a current or voltage signal, comprising:
a controller;
an analog-to-digital converter (ADC) coupled to the controller;
a sense circuit coupled to the ADC and configured to provide the current or voltage signal to the ADC from an AC mains;
a randomly jittered sampling module coupled to the ADC and operable to provide a trigger input to the ADC, the trigger input causing the ADC to acquire a sample of the current or voltage signal provided by the sense circuit;
wherein the randomly jittered sampling module is further operable to cause the ADC to acquire an aperiodic sequence of samples of the current or voltage signal, the aperiodic sequence of samples having an amount of aperiodicity that is randomly generated, and the controller is operable to perform signal processing on the aperiodic sequence of samples to extract information from the signal and provide the information to an external system.