| 摘要 |
PURPOSE:To automatically direct a prescribed object to a remote moving body by providing a control means deducing the position of a mobile body based on an electrical signal obtained from a reflection beam reception means and generating a direction control signal to direct the object in the direction. CONSTITUTION:Light emitting elements 14, 16 are subjected to alternate pulse drive by a light emitting element drive circuit 24, a light receiving element 18 receives pulsive infrared ray reflecting light beams RQa', RQb' from a recursive reflecting member 22 of the mobile body 20 alternately and generate voltage signals Ea, Eb corresponding to respective light intensities La, Lb in time division. After the voltage signals Ea, Eb are sampled by a sampling circuit 26, converted into digital signals Da, Db by an A/D converter 28 and given to a position detection operation section 30, which calculates the position of the mobile body 20 based on the signals Da, Db. A value P obtained in this case is converted into an analog signal Sp and fed to a motor drive circuit 34 as an error signal.
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