Device for validating digital message applicable in particular t

Details Device for validating digital message applicable in particular t Device for validating digital message applicable in particular t

1998-04-30

2000-06-13

Pope, Daryl

Communications: electrical

Traffic control indicator

Traffic control or local controller failure indicator

363132, G08G 1097

Patent

active

060754656

ABSTRACT:
Device for validating digital messages, applicable, in particular, to rail traffic regulating systems, of the type in wihch the absolute identity and the dynamic state of two digital messages (A and B) originating from two processing channels in parallel are checked, before producing, by means of an output amplifier (6), an on/off analogue safety signal (S) ensuring the operation of an actuator, characterised in that it further includes a Wheatstone diode bridge (1), the alternate inputs (2 and 3) of which are supplied respectively by the two messages (A, B), previously inverted in relation to one another, and the continous diagonal of which comprises an oscillator (4) the output (s) cf which constitutes the identity check signal for the messages (A, B), this signal controlling the output amplifier (6) via a static relay (5).

REFERENCES:
patent: 4631722 (1986-12-01), Voss
patent: 4816960 (1989-03-01), Littler et al.

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