Longwall support control for controlling the movements of longwall support units in the longwall of a mine
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United States of America Patent
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Nov 25, 2008
Grant Date -
Oct 5, 2006
app pub date -
Dec 11, 2003
filing date -
Dec 16, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A longwall support control for controlling the movements of longwall support units in the longwall of a mine that includes a central control system and a plurality of control units, of which a separate control unit (mining shield control device) is locally and operationally associated to each longwall support unit. The mining shield control devices connect to the central control system and to one another via two bus lines, through which each of the mining shield control devices can be called up for inputting a control command from the central control system or an adjacent mining shield control device. The identical second bus line (parallel bus) permits retransmitting to the adjacent mining shield control device, incoming signals that do not store a code word assigned to the respectively addressed mining shield control device.
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