HORIZONTAL ANGLE DETECTION METHOD OF ROD BODY AND HORIZONTAL ANGLE DETECTION DEVICE FOR ROD BODY

摘要

PROBLEM TO BE SOLVED: To facilitate an angle detection work, to improve its accuracy, to simplify the constitution as a device, and to facilitate its handling.;SOLUTION: A horizontal reference string 50 is tightened and held in the horizontal direction, and two separate parallel scale rows 44-1, 44-2 on the parallel positions on a horizontal plane with an axis 46 on a measuring stand 16 mounted on a casing pipe 12 are arranged at least on close positions to the lower part of the horizontal reference string in the horizontal state of the measuring stand. Crossing points (point A and point B) between the horizontal reference string 50 and the two separate parallel scale rows 44-1, 44-2 are read by the scales on each scale row, and the horizontal angle of a rod body to be measured with respect to the horizontal reference string is detected and recognized by angle conversion of the crossing angle with respect to the horizontal reference string based on read values at each crossing point.;COPYRIGHT: (C)2003,JPO