Measuring resonance parameters of piezoelectric transducers

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United States of America Patent

PATENT NO 11194028
APP PUB NO 20190079174A1
SERIAL NO

15888596

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Piezoelectric sensor controllers may facilitate detection and identification of various potential fault states with novel parameter measurements. In an illustrative embodiment of a piezoelectric-based sensor having a shorted-reverberation based resonant frequency measurement, the sensor includes a piezoelectric transducer that provides residual reverberation after being driven. The sensor further includes a controller that provides a low impedance path for the piezoelectric transducer during the residual reverberation and that measures current through the low impedance path to determine a resonant frequency of the piezoelectric transducer. In an illustrative embodiment of a sensing method having a shorted-reverberation based resonant frequency measurement, the method includes: driving a piezoelectric transducer that provides residual reverberation after being driven; providing a low impedance path for the piezoelectric transducer during the residual reverberation; and measuring current through the low impedance path to determine a resonant frequency of the piezoelectric transducer.

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Patent Owner(s)

  • SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Axman, Zdenek Sebetov, CZ 4 14
Horsky, Pavel Brno, CZ 27 249
Hustava, Marek Bratislava, SK 35 103
Kutej, Jiri Brno, CZ 7 61
Suchy, Tomas Brno, CZ 32 168

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