Dipartimento di Scienze Ambientali, Informatica e Statistica, Università Ca' Foscari Venezia, 30172 Venice, Italy.
Sensors (Basel). 2022 Feb 20;22(4):1650. doi: 10.3390/s22041650.
This article presents the design and experimental evaluation of a non-invasive wearable sensor system that can be used to acquire crucial information about athletes' performance during inline figure skating training. By combining distance and time-of-flight sensors and gyroscopes, the system is able to detect when jumps are performed and provides a live view of the data (e.g., the number and height of jumps) through a graphical user interface. The main novelty of our approach lies in the way in which the optical sensors are orientated. Typically, the sensors are orientated horizontally and positioned in pairs on the ground, where they measure the time interval between the moment the athlete leaves the ground and the moment they land. In our system, an optical sensor is placed under each foot and is vertically orientated so as to constantly measure the distance from the ground. In addition, a gyroscope sensor is placed on the athlete's back, which provides information on the direction and angular momentum of the movement. By combining this data, the system provides the accurate detection of various jumps and technical elements without any constraints on the training ground. In this paper, the system is also compared to similar platforms in the literature, although there are no other specific systems that are available for inline figure skating. The results of the experimental evaluation, which was performed by high profile athletes, confirm its effectiveness in correctly detecting jumps, especially considering its compromise between precision and the overall cost of the equipment.
本文提出了一种非侵入式可穿戴传感器系统的设计和实验评估，该系统可用于获取直排轮滑训练中运动员表现的关键信息。通过结合距离和飞行时间传感器以及陀螺仪，该系统能够检测跳跃的发生，并通过图形用户界面实时显示数据（例如，跳跃的次数和高度）。我们方法的主要新颖之处在于光学传感器的定向方式。通常，传感器水平定向，并成对放置在地面上，用于测量运动员离地和落地之间的时间间隔。在我们的系统中，每个脚下方都放置一个垂直定向的光学传感器，以便持续测量与地面的距离。此外，运动员背部还放置了一个陀螺仪传感器，用于提供运动方向和角动量的信息。通过结合这些数据，系统能够在不受训练场限制的情况下准确检测各种跳跃和技术动作。本文还将该系统与文献中的类似平台进行了比较，尽管没有专门针对直排轮滑的其他特定系统。通过由知名运动员进行的实验评估结果证实了该系统在正确检测跳跃方面的有效性，特别是考虑到其在精度和设备总成本之间的折衷。
