| 摘要 |
PURPOSE:To detect accurately depth position of an excavating from the ground surface, by installing magnetic field detectors in 2 positions on the vertical line on the periphery of the machine and a lead wire along the excavation indicating line respectively. CONSTITUTION:A pair of magnetic field detectors 11 is installed on the vertical line of the periphery of an excavating machine 1 and a lead wire 12 along the both sides of an excavation indicating line T on the ground surface. An electric current is admitted into the lead wire 12 from the source 13, the magnetic field thus formed is detected by the detector 11 and its signal is introduced into a controller 14 for correction of depthwise excavating direction of the machine 1. Thus, continuous detection of position of the excavating machine can be attained rapidly and accurately. |
