Electronic tamper detection in a utility meter using magnetics
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United States of America Patent
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Aug 4, 2015
Grant Date -
Mar 29, 2012
app pub date -
Sep 2, 2011
filing date -
Sep 2, 2010
priority date (Note) -
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Abstract
An arrangement for use in a utility meter includes a switch, a processing circuit, and a magnetic element. The switch is supported on a first meter structure. The switch has at least a first and second state. The switch is configured to transition from a first state to a second state responsive to a detected magnetic field of a first polarity, and to transition from a second state to a first state responsive to a detected magnetic field of a second polarity. The processing circuit is operably coupled to determine whether the switch is in the first state or the second state. The magnetic element is supported on a second meter structure configured to be physically connected to the first meter structure, the magnetic element positioned such that removal of the second meter structure from the first meter structure causes the magnetic element to expose the switch to a magnetic field of the first polarity.
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