| 摘要 |
PURPOSE:To improve the positioning accuracy in automatic operation, reduce the necessary control time, and improve the control performance, by metering the distance through switching of the max, metering distance and the metering cycle of a distance sensor according to the metering distance to a heap. CONSTITUTION:A driving apparatus 13 is controlled by a sensor operation controller 16, and a distance sensor 12 is driven, and the timing in distance measurement and the signl processing etc. are performed by a distance metering apparatus 17. And, an instruction apparatus 18 is also provided, while said apparatus 18 has such functions as to calculate the starting point for feeding bucket wheels on the basis of the iformation from each of detectors 9-15, 17 so as to transmit an instruction signal to each controller, while at the same time to control the automatic operation of feeding from the heap after positioning of feeding start point. Said instruction apparatus 18 is linked so that the informations are received and transmitted between itself and a central instruction apparatus 19 for generally managong a material yard. Further, the instruction apparatus 18 performs proper distance measurement by switching the max. metering distance and the metering cycle of the distance metering apparatus 17 by use of a metering distance switching apparatus 24 and a metering cycle switching apparatus 25, on proper times according to the metering distance value. |
