Magnetometer sampling to determine an electric power parameter
AssigneeInsight Energy Ventures, LLC
InventorsJoseph S. Wisniewski, Matthew Tilchen
Life of this patent
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Abstract
A method of analyzing an alternating electrical current includes polling a magnetometer at a constant sampling frequency to generate a plurality of magnetic field strength readings. The polling occurs over a plurality of cycles of the alternating electrical current. A time stamp is then assigned to each of the plurality of magnetic field strength readings, and the readings are saved within a common circular buffer according to each reading's respective time stamp and the fundamental frequency of the electrical current. A processor may then determine one or more harmonics of the magnetic field by analyzing the common circular buffer using a Fourier transform.
Claims10
A method of analyzing an alternating electrical current having a constant fundamental frequency and generating a magnetic field, the method comprising:
- positioning a multi-conductor electrical wire in contact with a cellular telephone, wherein the electrical current is flowing through the multi-conductor electrical wire;
- polling a magnetometer disposed within the cellular telephone at a constant sampling frequency to generate a plurality of magnetic field strength readings, wherein the polling occurs over a plurality of cycles of the alternating electrical current;
- assigning a time stamp to each of the plurality of magnetic field strength readings;
- saving each of the plurality of magnetic field strength readings within a common circular buffer according to its respective time stamp and the fundamental frequency of the electrical current;
- determining one or more harmonics of the magnetic field by analyzing the common circular buffer using a Fourier transform.
Dependencies are inferred from the claim text.