| 摘要 |
PURPOSE:To recognize the position of a vehicle, by rotating laser beam in a horizontal plane from a reference position at a constant speed and receiving the reflected beam from the vehicle and calculating a distance from a reciprocating time while calculating the azimuth to a reference azimuth from the change of a light receiving cycle. CONSTITUTION:Laser beam rotates at a constant speed toward a constant direction within a horizontal plane from a reference position P and reflected by the reflector of a vehicle to be received at the reference position. When the vehicle is stopped at a point A, the beam receiving cycle T of receiving laser signals 21-23 coincides with the rotary cycle of the prism 42 of a laser apparatus 40. When the vehicle moves to a point B to stop at said point B, in receiving laser signals 24-26, the cycle between the signals comes to tB<T and, when the vehicle moves to a point C, a signal 27 is obtained and the cycle between the signals 26-27 comes to tC>T. At the time, the moving position of the vehicle can be measured from a predetermined formula using the cycle of receiving laser beam and the azimuth angle of the vehicle without using an angle detector.
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