Obstacle-detecting apparatus
US5331312A · kind A · utility
491Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1992 |
| Grant date | Jul 19, 1994 |
| Priority date | — |
| Expiry date | Aug 7, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/194
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
This device can detect an obstacle in a railroad crossing or similar setting by way of image processing independently of a height and a width of an obstacle. The image data read from a video, camera 11 into a multi-valued image memory 13 is compared with background data stored in a background-data creating unit 15 in a data comparator 16. Based on the compared result, a still-object detector 17 detects if an obstacle exists. If it is detected that an obstacle exists and a rod of a crossing gate is down in a gate state detector 18, an alarm output unit 19 serves to output an alarm signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.