| 摘要 |
PROBLEM TO BE SOLVED: To automatically vertically hold a pole in surveying work. SOLUTION: An arm (threaded rod 31) is projected from a main body 2 mounted on a tripod support 1, a driving controlling mechanism for moving and controlling the arm by a polar coordinate system is mounted in the main body, a pole holding part (holding body 4) is mounted on a tip part of the arm, a sensor (mechanism 5) is mounted on the pole for detecting an inclination angle of the pole and outputting a detection signal, and the driving controlling mechanism is controlled on the basis of the detection signal.
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