Patent ID: 11194028

Abstract:
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.