Acoustic-emission sensor
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United States of America Patent
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Mar 9, 1993
Grant Date -
N/A
app pub date -
Aug 9, 1991
filing date -
Aug 10, 1990
priority date (Note) -
Expired
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Abstract
An acoustic-emission sensor includes a composite synthetic resin-ceramic piezoelectric element which has a plurality of substantially mutually parallel columnar ceramic piezoelectric bodies. The columnar ceramic piezoelectric bodies are polarized in a longitudinal direction and are disposed in a synthetic-resin matrix. Since only longitudinal waves can be detected from among acoustic-emission waves, an intensity and variation in intensity can be detected accurately.
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