| 摘要 |
PURPOSE:To measure the angle of intersection of a traverse formed by respective measurement points and the level of measurement surely at a high speed by receiving laser light receiving signal from light receive device at measurement points of both sides and reading the angle of intersection from the angle of rotation of a laser oscillator. CONSTITUTION:While the laser oscillator 3 of an angle measuring instrument 19 at a reference point P1 is rotated, laser beam is projected and swiveled and scanned in a horizontal plane. The swiveled laser light is received by the light receive device at a reference azimuth point P0 first and then by the light receive device 13 of the angle measuring instrument 19 at a measurement point P2, and the respective light receiving signals outputted at the time of the light reception are sent to a pulse counter device 17 through signal lines. This pulse counter device 17 counts the angle of rotation of the laser oscillator 3, i.e., the angle theta1 of intersection at the reference point P1 from a 1st light receiving signal input to the next one. The coordinates of the measurement point P4 of a shield machine is calculated from the angle theta1 of intersection and distance between the measurement points. |
