Remote Measurement and Vocal Feedback Method of Athlete's Motion and Its Applicability to Swimming.

如果从测量数据中提取的基本信息是实时可用的，那么测量运动员或球的瞬时速度通常有助于他们清楚地了解他们的身体运动和所产生的成绩之间的关系。为此，研制了一套光学遥测系统，并对该系统的测量性能进行了测试。频率为360赫兹。在无数个微角立方体的运动物体上贴上一个特殊的反射镜，一个对准扫描仪光轴的光电探测器捕捉光束通过运动物体时的反射光。通过相关滤波和插值法确定精确的反射时间，每2.78毫秒实时计算出当前目标的位置。视场：56^ﾟ，分辨率：0.06 mm(测量距离10米)，0.18 mm(测量距离20米)，全范围精度：0.7 mm。并对其在多目标测量中的适用性进行了研究。通过在每个物体上粘贴不同的条形码反射器图案，检验了相关法在3个物体之间的区分能力。在3000多个物体之间进行辨别是可能的。

Measurement of instantaneous velocities of athletes or a ball are often helpful for them to understand clearly the relationships between their body motions and the resultant performances, if essential information extracted from the measurement data is available in real time. For this purpose an optical remote measurement system was developed and its measurement capabilities were examined.A hexagonal rotatory mirror scanned horizontally a vertical slit beam across a measurement field with 20m in dia. at 360Hz. A special reflector was stuck on a moving object, which was of numberless micro corner cubes.A photo detector aligned on the optical axis of the scanner captured reflected light just when the beam passed over a moving object. By determining the exact time of reflection via a correlation filter and an interpolation method, current object position was calculated in real time on every 2.78 msec.The system has following capabilities. Field of view : 56^ﾟ, resolution : 0.06mm (at a measuring distance of 10m), 0.18mm (at 20m), accuracy : 0.7mm in the whole range. Applicability to measurement of multi-objects was also investigated. By sticking a different bar coded pattern of reflector on each object, discrimination ability of the correlation method among 3 objects were examined. Discrimination among far more than 3 objects was seen possible.