Detection system and method for the verification of the function

Communications: electrical – Condition responsive indicating system – With particular system function

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340514, G08B 2900

Patent

active

054500591

ABSTRACT:
Detection system with receptor controlled by an emitter and having a microcontroller and a device to verify the proper functioning of the receptor which includes an additional control circuit connected to the receptor and to a terminal of the microcontroller. The microcontroller includes a generator-programmer which controls at time intervals the emission of a signal to activate the additional control circuit which forces the receptor to assume its non-conducting state, and which analyzes the corresponding instantaneous state of a node of the detector in such a manner as to prevent the control center from directing the control circuit if its instantaneous state is different from the inactive state.

REFERENCES:
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patent: 4603318 (1986-07-01), Philp
patent: 4652819 (1987-03-01), Kammerer
patent: 4870394 (1989-09-01), Corl et al.
patent: 4962368 (1990-10-01), Dobrzanski et al.
patent: 4990895 (1991-02-01), Juds
patent: 5151682 (1992-09-01), Marinitsch

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