Controller having a fail safe function, automatic train controller and system using the same
US5805797A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1995 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Dec 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1004
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An ATP device generates control data for two systems from an ATP command speed signal, provides duplicate logic units in the ATP device so as to process the respective control data, provides at least two CRC data for checking the control data for each system, and changes the CRC data of the opposite logic unit or selects one of the two according to the content of a failure detection signal from each of the duplicated logic units. It is possible to check the control data and the operation of each logic circuit in such a way that only when all the data, circuits, and elements operate normally will an output signal for controlling the object to be controlled be outputted, and when a failure is detected in a part, an output signal to that effect is outputted. Therefore, when a failure occurs, a fail safe function for performing control on the safe side is made possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.