| 摘要 |
A method and device for detecting and responding to impact loosening of thread joints at rock drilling, in which vibrations from a drill string ( 1 ) are sensed at the same time as a rock drilling machine ( 2 ) movable along a feed beam ( 6 ) exerts the drill string ( 1 ) to impacts without feeding the drill string ( 1 ) against a ground ( 3 ), the sensed vibrations are supplied to an analysis tool ( 4 ), the sensed vibrations are compared with known vibration patterns by the analysis tool, and a signal is sent to a control system ( 5 ) for controlling the rock drilling machine ( 2 ) for stopping an impact device of the rock drilling machine when the analysis tool detects that the sensed vibrations correspond to a known vibration pattern indicating that the thread joints have been loosened by impact.
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