Methods and apparatus to determine an operational status of a device
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United States of America Patent
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Mar 26, 2024
Grant Date -
Aug 25, 2022
app pub date -
May 12, 2022
filing date -
Jan 6, 2014
priority date (Note) -
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Abstract
Methods, apparatus, systems and tangible computer readable storage media are disclosed to determine an operational status of a device. Disclosed example apparatus include memory and processor circuitry to execute computer readable instructions to at least measure with a first sensor, a first magnetic field in at least three dimensions, the first magnetic field including a device magnetic field caused by a wire attached to a device to supply electricity to the device, the first sensor proximately arranged to the wire, measure with a second sensor, a second magnetic field associated with an environment at least a first distance from the wire, and compare (a) the first magnetic field as measured by the first sensor arranged proximate to the wire and (b) the second magnetic field as measured by the second sensor.
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