Patent ID: 8688407
Filing Date: 2014-04-01
Classification: G01R

Abstract:
1. A method for tamper detection in a meter comprising: continuously detecting, using a magnetic field strength sensor, magnetic field strength proximate to a meter, wherein the magnetic field strength sensor produces an analog voltage signal proportional to the detected magnetic field strength; continuously converting the analog voltage signal to a digital voltage signal; storing, using a processor, the digital voltage signal in a memory on an intermittent basis, resulting in a plurality of stored digital voltage signals in the memory; and monitoring the plurality of stored digital voltage signals in the memory for an aberration in one or more of the plurality of stored digital voltage signals, wherein the aberration can indicate tampering of the meter, monitoring the plurality of stored digital voltage signals for an aberration comprises determining an average for the plurality of stored digital voltage signals, and the aberration comprises a deviation of the digital voltage signal from the average.