Travel safety system for vehicle
US6269307A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1999 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Aug 5, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/93271
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A lateral deviation .delta.d which is a lateral distance between an intrinsic appropriate course R for a vehicle Ai and a contact position P at which the vehicle Ai will come into contact with an on-coming vehicle Ao, is calculated based on a relative angle .theta., a relative distance L and a relative speed Vs which are detected by a radar device, and based on a vehicle speed Vi of the vehicle Ai detected by vehicle speed sensors. When the lateral deviation .delta.d is in a range of .delta.dn<.delta.d<.delta.dx, it is determined that there is the possibility that the vehicle Ai will collide frontally with the on-coming vehicle Ao. The lateral deviation .delta.d can be calculated based on the relative angle .theta., the relative distance L and the relative speed Vs provided in one cycle of transmission and reception of beam by the radar device. Therefore, the possibility of collision can be determined immediately at a time point when the on-coming vehicle Ao is recognized, without continuous detection of the correlation between the vehicle Ai and the on-coming vehicle Ao by the radar device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.