Extraction device, particularly for mining, and method for controlling the extraction device

摘要

The invention relates to an extraction device, particularly for mining, comprising two drive stations (1, 4) and a drive chain (6) circulating between the sprockets (3, 5) thereof. In order to be able to detect a hanging chain or chain wear on a supply chain in a supply system (10) or a plane chain in a plane system, magnetic sensor units (20) are provided for detecting at least one chain state of the drive chain, wherein each sensor device (20) comprises a transmitter formed by a static or dynamic magnetic field generator and a detector field (22) provided with a plurality of magnetic field detectors (23) as a detector that are disposed to the side of a passage for the strand of the drive chain (6) to be scanned. The invention further relates to a method for controlling an extraction device for preventing hanging chains.