| 摘要 |
<p>A method and apparatus for remotely controlled operation of one of several control devices (13) for support frames in underground mining in which the control device (13') to be actuated is selected by means of an infra-red remote operation and then the transmission of control data between a remote controller (16) and the selected control device (13) is effected by radio transmission. The remote controller, (16) has not only a radio transmitter (18) and the control devices (13) a radio receiver (15), but each control device (13) is additionally provided with at least one infra-red receiver (20), whereby by an infra-red data transmission, the control device (13') to be actuated is first deliberately selected by the remote controller (16), before the control data is then subsequently transmitted by radio.</p> |
