Ultrasonic object detection device
US9864057B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 14, 2015 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Jul 14, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/521
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic object detection device includes: a first echo prolongation determination unit that sequentially determines whether a measured echo time of an ultrasonic sensor is prolonged from a reference echo time; a second echo prolongation determination unit that determines whether an addition echo time is prolonged from the reference echo time when the measured echo time is not prolonged from the reference echo time, and the ultrasonic sensor detects a reflected wave, the addition echo time being obtained by adding, to the measured echo time, a time from termination of an echo to termination of a first reflected wave; and a short distance object detection unit that determines that an object is disposed within a short distance so as to receive the reflected wave while the echo is not terminated when one of the measured echo time or addition echo time is prolonged from the reference echo time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.