| 摘要 |
PCT No. PCT/FR90/00220 Sec. 371 Date Nov. 30, 1990 Sec. 102(e) Date Nov. 30, 1990 PCT Filed Mar. 30, 1990 PCT Pub. No. WO90/12195 PCT Pub. Date Oct. 18, 1990.Device for the auditory and/or visual representation of mechanical phenomena in the interaction between a drilling tool and rock being drilled, characterized by the fact that it includes a mechanism for picking up a vibratory signal representing the vibration of the tool at the cutting face using an accelerometric sensor at a specific point on the drilling stem and processing equipment (45, 31, 31) for filtering the signal in the frequency band of 10 to 200 Hz. |
