Circuit for acoustic distance time of flight compensation
US10234549B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2016 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Feb 4, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2015/938
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In one form, an acoustic signal is generated for an acoustic transducer, where the acoustic transducer transmits the acoustic signal to determine a first position of an obstacle. In response to the acoustic signal encountering the obstacle within a predetermined distance, an echo, or pulse, is detected at the acoustic transducer. At a first time, a magnitude is detected in response to a rising edge of the pulse intersecting a determined threshold. A second magnitude is detected in response to the detection of a first peak of the pulse. A time of flight of the acoustic signal, within the predetermined distance, is determined when a compensation time is extracted from a correction calculation algorithm in response to detecting the first magnitude and the second magnitude. The compensation time is subtracted from the first time, and the difference of the compensation time and the first time is the time of flight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.