Vehicle control system having two trackside signal lines
US4854529A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1988 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Apr 6, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L3/18
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle control system in accordance with the present invention permits a vehicle to move only in the case where both of a device for detecting the content of a signal for directing the travelling speed of the vehicle transmitted from the trackside and a device for detecting the presence of the above signal perform detecting operations. The apparatus also comprises a device for detecting an abnormal operation of both the above mentioned devices, so that a runaway of the vehicle can be avoided. In addition, a voltage signal can be used for detecting the speed, and the vehicle can be controlled by means of a set of two signal lines, resulting in a reduction in the amount of equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.