ビデオトラッカーを用いた三次元運動計測法について

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In model experiments on a vessel towed by a carriage, the optical motion measurement system using two video trackers and cameras is the most preferable because the optical system need only turget lamps on a model and because we can measure the position and the motion of a towed model, even if she is far away from a towing carriage. In this paper, the measurement method of three dimensional motions of a model using the optical system is described as well as the components, procedures and measuring accuracy. Furthermore, the optical measurement system was applied to a model experiment, in which models of a barge type and a semisubmersible type were towed by a carriage in regular and irregular waves. The motions of a model were measured by the optical system and also by gyroscopes and accelerometers on the model. The measurement results by the optical system are compared with those by the other equipments. The conclusions in this paper are summarized as follows; (1) In this model experiment, the values of the orientation parameters to stand for the positions of two cameras are. scattered within about 10% of the values measured by two transits. Therefore, it is advisable to use more precise value measured by other means for the distance between the camera and the orgin of theearth-fixed coordinate system. (2) The optical measurement system using two video trackers is as much effectiveas gyroscopes and accelerometers to measure three dimensional motions of a model. (3) The optical measurement system makes it possible to measure a low frequency motion for which accelerometers are useless.
独立行政法人海上技術安全研究所の論文
1990-11-30

ビデオトラッカーを用いた三次元運動計測法について

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