Monitoring
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United States of America Patent
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-
Sep 3, 2002
Grant Date -
Jan 3, 2002
app pub date -
Apr 1, 1999
filing date -
Apr 24, 1998
priority date (Note) -
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Abstract
An aircraft has several ultrasonic phased arrays acoustically bonded to parts of its structure to be monitored. The arrays are energized to produce an ultrasonic beam that scans the structure in two planes. A monitor receives the output from the arrays produced by reflection of energy from discontinuities within the structure. When there is a change in these outputs, the monitor signals a pilot display unit and a flight control system such that the aircraft flight envelope can be restricted to minimize damage.
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