Computer Measurement of Coulped Pendulum by Using Photo-Position Detector

光点の変位を電圧に変換るす素子を応用して，連成振子の運動をコンピュータ計測した。従来の紙送りXTレコーダによるアナログ測定に比べて，2個の振子のデジタルデータが殆ど同時的に高速に記録され，励振する振子と励振される振子との間の位相関係を明確にすることができた。糸の長さと錘の質量比を実験の場合と同一に設定して，変位と位相差の計算を行い，XYプロッタに描き，実験結果と比較し検討を加えた。Applying an element that transforms the position of a spot light to the voltage,the motions of a coupled pendulum were measured with a computer.The digital data about the two pendulums can be almost simultaneously and rapidly recorded in comparison with an anolog measurement by a conventional paper-driven XT-recorder.The phaserelation botween the pendulum that excites another and the pendulum that is excited by another was evidently appreciated.The analytic solution for the most general case was presented and the calcul ation of displacement and phase difference under the same condition as the experiment was drawn on the XY-plotter and compared with the experimental results