| 摘要 |
A device for measurement of borehole diameters and cavities has a body, spring supported levers hinged to it, indicators of aperture angle of levers and transformers of signals of those, these transfer by cable information to registration device. It comprises a mechanical springy stopper with manual control, for bringing levers to transportation and working states, and trolley with automated counter that fixes by means of indicator length of well synchronously with readings of indicators of aperture angle of levers. The source of electric power supply of the device and the registration device for signals that come from indicators are placed in mine working of the mine just at the mouth of well being drilled. |
