Controller having a fail safe function, automatic train controll

Details Controller having a fail safe function, automatic train controll Controller having a fail safe function, automatic train controll

1995-12-28

1998-09-08

Decady, Albert

Excavating

371 681, G06F 1100

Patent

active

058057978

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.

REFERENCES:
patent: 3444528 (1969-05-01), Lovell et al.
patent: 4610013 (1986-09-01), Long et al.
patent: 4622667 (1986-11-01), Yount
patent: 4882731 (1989-11-01), Van Gils
patent: 5202822 (1993-04-01), McLaughlin et al.
patent: 5600786 (1997-02-01), Baker et al.

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