| 摘要 |
<p>PURPOSE:To perform accurate and rapid positioning by so moving and positioning a hand that all the detected values of a plurality of detectors fall within a predetermined range. CONSTITUTION:Insulation material plates 16, 17 are attached to a hand 14, and three electrodes 18, 19, 20 are attached thereto at a predetermined interval from the center O of a holding implement 14a of the hand 14. Voltage sensors 21, 22 detect potential differences between the electrodes 18 and 20, 19 and 20. The electrodes 18, 19, 20 are used to detect the intensity of an electric field from a line L. When both the voltages from the sensors 21, 22 become a predetermined value or less, the hand 14 is positioned correctly with respect to the line L. The hand 14 is so controlled to be positioned as to obtain such a state.</p> |
