Measuring and testing – Vibration – By mechanical waves
Patent
1985-07-31
1987-04-07
Birmiel, Howard A.
Measuring and testing
Vibration
By mechanical waves
299 1, G01V 2900, E21C 3900
Patent
active
046550828
ABSTRACT:
A mining machine having means for sensing property variations of the materials associated with a seam of a mine. The machine comprises a member (4) which rotates about an axis A. The rotatable member mounts at least one cutter 6 spaced from the axis for cutting material from the seam. A rod (10) carried by the rotatable member is held in releasable engagement with the cutter. The rod extends to the axis of the rotatable member to conduct to the axis, strain waves which are induced by variations in cutter vibration as the cutter encounters property variations of the materials associated with the seam. A transducer (24,54) is located at the axis of the rotatable member in communication with the rod to convert the strain waves in the rod to electric signals which may be recorded or visually displayed.
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Birmiel Howard A.
Massachusetts Institute of Technology
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