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

运动员或球的瞬时速度的测量，如果能在真实的时间内提取出运动员或球的基本信息，往往有助于运动员更清楚地了解其身体运动与运动成绩之间的关系。为此，研制了一套光学遥测系统，并对其测量性能进行了检验。360Hz。在运动物体上粘贴一个特殊的反射镜，该反射镜由无数个微小的角隅立方体组成，当光束经过运动物体时，一个与扫描仪光轴对准的光电探测器捕获反射光。通过相关滤波和插值方法确定反射的准确时间，每2.78毫秒计算当前目标的真实的时间。视场：56 μ m，分辨率：0.06mm（测量距离10m），0.18mm（测量距离20m），全量程精度：0.7mm。对多目标测量的适用性也进行了研究。通过在每个物体上粘贴不同的反射器条形码图案，检验了相关方法对3个物体的区分能力。在远超过3个对象之间的歧视被认为是可能的。

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.