Dual-channel acoustic distance measurement circuit and method
US11899106B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2022 |
| Grant date | Feb 13, 2024 |
| Priority date | — |
| Expiry date | Oct 5, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q9/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An acoustic distance measurement circuit includes a transmitter, a receiver, and a controller. The transmitter has an output adapted to be coupled to an acoustic transducer for providing a selected one of an amplitude-modulation (AM) signal in an AM mode and a chirp signal in a chirp mode. The receiver has an input adapted to be coupled to the acoustic transducer, and an output for providing a digital received signal. The controller is operative during a first measurement period to: place the transmitter into one of the AM mode and the chirp mode using a first channel, selectively detect a direct echo in the first channel of the digital received signal of the one of the AM signal and the chirp signal, and selectively detect an indirect echo in a second channel of the digital received signal of another one of the AM signal and the chirp signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.