On-vehicle device for road-vehicle communication
US5777565A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Jul 18, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B15/063
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An on-vehicle device for road-vehicle communication includes a communication unit for exchanging information with an on-road device, and storage unit for storing necessary information. When a communication error occurs between the on-vehicle device and the on-road device, information regarding the communication error is stored in the storage unit. The vehicle device further includes a card read-write unit into which a control card is removably inserted. The control card has a storage area for storing the above-described error information and information necessary in the on-vehicle device. Via the card read-write unit, information stored in the storage unit is transferred to the storage area of the control card to be stored therein, and information stored in the storage area of the control card is transferred to the storage unit to be stored therein. Accordingly, when a communication error occurs between the on-vehicle device and the on-road device, information regarding the communication error is transferred from the storage unit to the control card, so that information regarding the communication error can be obtained from the on-road device via the control card.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.