Transducer array self-diagnostics and self-healing
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United States of America Patent
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Aug 18, 2015
Grant Date -
Oct 16, 2008
app pub date -
Feb 28, 2008
filing date -
Apr 16, 2007
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Abstract
A method of performing transducer self-diagnostics and self-healing on an array of sensor transducers bonded to a structure for health monitoring includes measuring impedance to detect whether a transducer is missing, or a connection is damaged. Pitch-catch signals generated between one or more pairs of transducers are analyzed for detecting defects according to selected criteria of defect size and location to determine whether the sensors are damaged or partially/fully disbonded. Based on the resulting map of operational transducers, signal transmission paths are added/extended between additional pairs of transducers to maintain inspection coverage of the structure according to the selected criteria.
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