Object detection device
US11209542B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2019 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | Jan 30, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/003
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An object detection device which determines an amplitude Ar of an ultrasonic wave received by a receiving unit, detects a frequency fr of the ultrasonic wave, sweeps a frequency fp of a pulse signal after a predetermined time has elapsed from start of generation of the pulse signal, and determines that the received ultrasonic wave is a reflected wave of the probe wave when the frequency fr after the amplitude Ar becomes a predetermined reference value or more from start of transmission of the probe wave makes the same change as the frequency fp. When an ultrasonic wave received by a receiver is determined to be a reflected wave of the probe wave, the object detection unit calculates a distance to an object based on a time from transmission of the probe wave to reception of the ultrasonic wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.