Motion-compensated distance sensing with concurrent up-chirp down-chirp waveforms
US11982740B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2022 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Aug 23, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2015/932
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Various sensors, sensor controllers, and sensing methods are suitable for use in a multi-channel ultrasonic sensor array such as those used in systems for parking assistance, blind spot monitoring, and driver assistance. One illustrative acoustic sensing method includes: driving an acoustic transducer to send acoustic bursts each including an up-chirp in a first frequency band and a down-chirp in a second frequency band; receiving echo signals responsive to the acoustic bursts from the transducer; and using the echo signals to determine a distance or time of flight from the transducer. Another acoustic sensing method includes: driving an acoustic transducer to send acoustic bursts each including a concurrent up-chirp and down-chirp; receiving echo signals responsive to the acoustic bursts from the transducer; and using the echo signals to determine a distance or time of flight from the transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.