| 摘要 |
<p>The device consists of a range finder (2), whose function is to measure the distance between itself and each measuring point, and a system (9, 10) for orientating the range finder about two perpendicular rotation axes. Two geared stepping motors are used to produce the two rotating movements. A computer incorporates a microprocessor designed to acquire each value of the distance measured by the range finder, and controls the motion of the stepping motors by storing in memory the number of steps made during the rotation about each axis. From the distance between the range finder and each point and from the angles of rotation of the beam between the various measured points, the computer then calculates the distance between at least two points.
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