Piezoelectric audible alarm frequency self-calibration system
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United States of America Patent
Stats
-
Jun 23, 1981
Grant Date -
N/A
app pub date -
Jan 9, 1980
filing date -
Jan 9, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A piezoelectric transducer frequency self-calibration system interrogates the transducer by driving it with various frequencies within a specified range while monitoring the transducer output power level. Two threshold frequency points are identified at which the output power level is at a predetermined threshold level less than the expected maximum output level, and the average of these two threshold frequencies is taken to be the optimum frequency.
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Family
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Cited Art Landscape
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