| US 7,455,368 B2 | ||
| Control mechanism for the extension units in the longwall face of a mine | ||
| Willi Kussel, Werne (Germany); and Peter Rahms, Billabeck (Germany) | ||
| Assigned to Tiefenbach Control Systems GmbH, Essen (Germany) | ||
| Appl. No. 10/538,828 PCT Filed Dec. 11, 2003, PCT No. PCT/DE03/04083 § 371(c)(1), (2), (4) Date Feb. 02, 2006, PCT Pub. No. WO2004/059129, PCT Pub. Date Jul. 15, 2004. |
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| Claims priority of application No. 102 61 139 (DE), filed on Dec. 21, 2002. | ||
| Prior Publication US 2006/0158016 A1, Jul. 20, 2006 | ||
| Int. Cl. E21D 23/12 (2006.01); E21D 23/14 (2006.01); E21D 23/00 (2006.01); E21C 35/24 (2006.01) | ||
| U.S. Cl. 299—1.7 [405/302] | 5 Claims |
| 1. A longwall support control for controlling the movements of a plurality of longwall support units in the longwall of a
mine, comprising:
a central control system, and
a separate mining shield control device locally and operationally associated to each longwall support unit, the mining shield
control devices being connected via radio to a portable decentralized operating device for inputting control commands and
for feeding back inspection data,
wherein each mining shield control device comprises a multi-channel radio transceiver, such that the mining shield control
device is in a simultaneous transmit and receive mode with the decentralized operating device for receiving control signals
and for transmitting inspection data, and wherein the mining shield control device is programmed in such a manner that control
signals that are received via radio, can be converted into functions of the longwall support unit when the control signal
stores a code word that is associated with the called up mining shield control device, and
wherein the mining shield control devices are interconnected and also connected to the central control system via at least
one bus line for transferring input data to all mining shield control devices, and
wherein a mining shield control device closest to the decentralized operating device receives the strongest radio signal from
the decentralized operating device and is able to retransmit the received signal via the at least one bus line to the other
mining shield control devices, while also permitting direct back and forth radio contact between the operating device and
a selected mining shield control device.
|