Abstract
Today the automatic block system of numeric code is the primary of interval traffic control on stages. Features of decentralized placement of equipment and planned preventive methods of maintenance lead to a significant number of failures in the system, which affects on the execution of train schedule adversely and as a result on the economic performance of the operating of the railway. These facts lead to the need of development of diagnosing systems and remote monitoring of automatic blocking system, which is required the development of system model in a convenient form for later using. To complete of this task the typical of failures of automatic block system and the types of diagnostic models are analyzed by author, that is allowed us to describe the system of automatic blocking in the form of function graph-model. Proposed graph-model can be used for further construction of the system of technical diagnostics of automatic block system devices.
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