Automotive rear safety checking apparatus
US4467313A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 12, 1981 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Nov 12, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/909
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An automotive rear safety checking apparatus which comprises a plurality of obstacle detectors mounted on the rear part of the automobile for radiating ultrasonic wave on the watching areas smaller in width than the width of the automobile respectively and detecting the ultrasonic wave reflected from an obstacle. The ultrasonic wave is radiated from the obstacle detectors in time division. Pulse signals in the number associated with the distance between the obstacle detector and the obstacle are generated in response to the detection of the ultrasonic wave reflected from the obstacle, so that the relative positions of the automobile and the obstacle, are indicated two-dimensionally in accordance with the pulse signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.