Shaped ultrasonic transmission and echo processing with coding
US11346941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2019 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Jun 7, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/931
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Ultrasonic sensing systems and associated methods provide side-lobe reduction to improve the acoustic detection of small objects, the signature envelope peaks of which can otherwise be obscured by subsidiary envelope peaks in side lobes that result from residual correlation between a signal received by an ultrasonic transducer and a template signal corresponding to a burst signal emitted by the ultrasonic transducer. A shaping signal by which the amplitude of the burst signal can be varied with respect to time is taken into account in the template signal, and correlator circuitry correlates a signal derived from the ultrasonic transducer with the template signal to produce a correlated output exhibiting the desired side-lobe reduction. The distance from the transducer to the detected object can thereby be determined with enhanced accuracy and responsiveness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.