SYSTEM AND METHOD FOR CHARACTERIZING FERROMAGNETIC MATERIAL
First Claim
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1. A method for characterizing a ferromagnetic material, comprising:
- receiving measured magnetic field data from a plurality of sensors adjacent the ferromagnetic material at a plurality of locations along the ferromagnetic material;
deriving measured magnetic field features from the measured magnetic field data; and
comparing the derived magnetic field features with modeled magnetic field features to identify occurrence of a phenomenon in the ferromagnetic material.
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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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27 Claims
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1. A method for characterizing a ferromagnetic material, comprising:
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receiving measured magnetic field data from a plurality of sensors adjacent the ferromagnetic material at a plurality of locations along the ferromagnetic material; deriving measured magnetic field features from the measured magnetic field data; and comparing the derived magnetic field features with modeled magnetic field features to identify occurrence of a phenomenon in the ferromagnetic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for characterizing a ferromagnetic material, comprising:
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memory capable of storing magnetic field data from at least one sensor configured to measure magnetic field data at a plurality of scan positions along the ferromagnetic material, and software including machine readable instructions, a processor coupled with the memory, the processor configured to, in response to execution of the software, perform the steps of; derive magnetic field feature data from the magnetic field data at the plurality of scan positions, and compare the measured magnetic field feature data with modeled magnetic field feature data to identify a phenomenon in the ferromagnetic material. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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Specification