TRACKING GUIDANCE AND INFORMATION TRANSMITTER OF GROUND RUNNING BODY BY OPTICAL BEAM

摘要

PURPOSE:To irradiate optical beam by controlling a light beam scanning means based on the state change in the presence or absence of an extreme time of a reflected light beam detection signal by a scanning control logical circuit so as to track exactly the ground running body. CONSTITUTION:Even when a reflection light beam detecting means 14 of a projector 1 detects the 1st reflected light beam from reflecting means 4, 5 of a ground running body 2, a light beam scanner 20 keeps the scanning of light beam as it is and when the 2nd reflection light beam is detected within a prescribed short time after the reflected light beam is lost, the scanning so far is stopped and the scanning is switched to the tracking scanning. When the reflected light beam from the reflecting means 4 at the front side of a photodetecting means 3 is detected, the scanning is stopped and the ground running body 2 keeps running in the direction shown in the arrow A, the light beam irradiates only the photodetection means 3. The scanning in the direction as the scanning direction command is restarted at this moment and he reflected light beam from the reflecting means 4 is detected by a reflected light beam detection means 14, resulting that the scanning of the light beam is stopped immediately.