Feedback of propulsive acceleration for competitive swimming training

利用惯性传感器记录仪测量了蛙泳运动员腰部的加速度和角速度，利用传感器数据可以准确地估计出蛙泳运动员腰部沿推进方向的加速度。虽然这种方法很难实时地进行估计，但发现运动员躯干纵轴上的测量加速度与游泳加速度有部分对应关系。这一发现被应用于开发一种设备，该设备能够通过声音频率来表达游泳加速度的变化。该系统实现了蛙泳过程中游泳加速度的反馈。

The acceleration and angular velocity of swimmer's lumber in breaststroke swimming was measured using an inertial sensor logger, and it was accurate to estimate the swimming acceleration along the propulsive direction using the sensor data. Although it was difficult to execute the estimation in real-time by the methodology, it was found that the measured acceleration along longitudinal axis of swimmer's trunk was partially corresponded with the swimming acceleration. The findings were applied to develop a device, which was able to express changes of the swimming acceleration by frequency of sound. The developed system made possible the feedback of the swimming acceleration during breaststroke swimming.