SYSTEM AND METHOD FOR CHARACTERIZING FERROMAGNETIC MATERIAL
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United States of America Patent
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Apr 20, 2017
app pub date -
Jun 29, 2016
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Jun 29, 2015
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Abstract
A system and method using magnetic sensing to non-intrusively and non-destructively characterize ferromagnetic material within infrastructure. The system includes sensors for measuring magnetic field gradients from a standoff distance adjacent to ferromagnetic material. The method includes using the system to measure magnetic fields, determining magnetic field gradients measured by a sensor array, and comparing measured and modeled or historical magnetic field gradients at the same or similar positions to identify differences caused by a phenomenon in the ferromagnetic material, and, in a particular embodiment, to recognize defects and developing defects.
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