School bus obstacle detection device
US5250945A · kind A · utility
6Cited by
18References
3Claims
0Family size
Inventor
Key dates
| Filing date | Jan 5, 1993 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Jan 5, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/93275
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A driver alerting device for a school bus or the like includes a pair of transceivers adapted for mounting at the forward end and below the vehicle. Return wave signals from any object or person within the transceiver range are supplied to the transceiver through an antenna connection. Any resultant doppler shift signal is amplified for driving the audio alarm to alert the driver to the presence of a person or object within the transceiver range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.