The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 2010
Filed:
Sep. 15, 2006
Didier Essame, Le Plessis Robinson, FR;
Philippe Forin, Guyancourt, FR;
Benoit Fumery, Bures sur Yvette, FR;
Didier Essame, Le Plessis Robinson, FR;
Philippe Forin, Guyancourt, FR;
Benoit Fumery, Bures sur Yvette, FR;
Siemens Transportation S.A.S., Chatillon, FR;
Abstract
A secure system has two computers that are intrinsically safe and implements a method for verifying the redundancy for the outputs where a very high level of safety is required. The method makes it possible to handle inconsistencies in the outputs of the two computers when they are working in redundant mode. Each computer receives the output states determined by the other computer and compares them to states calculated. A state of divergent operation is detected if the computers have determined two different states for a single output. If a divergence is detected for at least one output, the state of that output is determined by preventing any transition from a restrictive state to a permissive state.