Position Measurement of a Moving Mark by Vision and Laserg

The purpose of this paper is to measure the working radius of a crane truck by using vision systems. Then, we introduce the observation device which is equipped with a CCD camera, a laser range finder and two AC servo motors. Further, we propose new algorithm for the mark recognition and then construct PID control system with an extended Kalman filter in order to realize the system without the time delay. Through some experiments, we verify performance of observation device which we developed