Piezoelectric transducer with model-based field equalization
US11982776B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2021 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Jan 9, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/931
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed sensors, sensor controllers, and sensor control methods enhance transducer performance using a model-based equalization method that can be performed in the field. One illustrative method for operating a piezoelectric-based sensor includes: sensing a response of a piezoelectric transducer as a function of frequency; deriving parameter values of an equivalent circuit for the piezoelectric transducer from the response; using a squared magnitude of the equivalent circuit's transfer function to determine a system level selectivity; and adapting at least one operating parameter of the sensor based on the system level selectivity. One illustrative controller for a piezoelectric transducer includes: a transmitter that drives the piezoelectric transducer; a receiver that senses a response of the piezoelectric transducer; and a processing circuit coupled to the transmitter and to the receiver to calibrate the transducer using the foregoing method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.