Non destructive magnetostrictive testing with unidirectional guided waves generated by ferromagnetic strip sensor
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United States of America Patent
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Nov 5, 2019
Grant Date -
Jun 14, 2018
app pub date -
Dec 12, 2016
filing date -
Dec 12, 2016
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Abstract
A ferromagnetic strip sensor for use in magnetostrictive testing of various structures. In its simplest form, the sensor has a ferromagnetic strip with an electrical coil winding. A permanent magnet is positioned atop the strip, aligned with but offset from, a center axis of the strip. The sensor is operable such that a time varying current in the coil results in a unidirectional guided wave. This guided wave travels within the structure, and is reflected from anomalies in the structure.
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