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的运动加速度和角速度，利用传感器数据可以准确地估计出游泳运动员在推进方向上的运动加速度。尽管该方法难以实现实时估计，但结果表明，游泳者躯干纵轴方向的加速度测量值与游泳加速度有一定的对应关系。这一发现被用于开发一种能够通过声音频率来表达游泳加速度变化的装置。开发的系统使蛙泳过程中游泳加速度的反馈成为可能。

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.