レーザ光平面による位置計測法(第4報)

三次元位置計測システムの開発

抄録

This paper describes a new trial system and experimental results for the three-dimensional position measurement. The principle is based on the well-known mathematical and geometric fact. It is possible to regard one point in three-dimensional space as an intersection of three planes. Then, the coordinates of it can be obtained by solving simultaneous equations of three planes. The system consists of three laser scanners, a laser detector on the target point and a computer. Each scanner is used to rotate the linearly spread laser beam called laser plane. When the detector is on the plane, each scanner to decide the equation of the plane measures the rotation angle. Ball type detector and hole type detector are developed in order to decrease the error by the incident angle. As a result of the experiment, following fact clarified. The detection range of incident angle in using the ball type is ±36 degrees. The range in using the hole type is ±60 degrees. The measurement accuracies of ±0.22mm in the small space (160mm height, 160mm width, 400mm depth) and ±0.69mm in the large space (600mm height, 600mm width, 800mm depth) are achieved. Main error factor is the coordinate error of standard point given for the calibration.