NASA NTRS · 19660000028
Portable self-powered device detects internal flaws in tubular structures
Abstract
Portable probe and eddy-current-sensitive circuitry detects internal flaws or hard spot impurities in an electrically conductive tubular channel by recording the conductivity change at the defect point.
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Gilmour, G.. 1966-01-01. Portable self-powered device detects internal flaws in tubular structures. https://ntrs.nasa.gov/citations/19660000028
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