It is helpful to analyze volleyball spiking technology and improve spiking quality to extract volleyball spiking trajectory. This article studies the extraction method and teaching method of volleyball spiking trajectory based on a wireless sensor network. The acceleration sensor and gyroscope sensor are used to collect the spiking action state information of volleyball players. The collected information is transmitted to the PC terminal through the wireless sensor network, including physical layer, data link layer, network layer, transmission layer, and application layer, using the LEACH clustering routing protocol algorithm. In the PC terminal, the feedback filtering method is used to preprocess the received information and calculate the integral of each sensor node’s acceleration, connecting the spatial coordinates of each time to obtain the upper limb trajectory in three-dimensional space and realize the trajectory extraction of volleyball spike action. The experimental results show that the position error is less than 0.01 m and the speed error is less than 0.15 m/s. The application of this method in volleyball teaching can effectively improve the quality of volleyball teaching.

中文翻译：

---

一种基于无线传感器网络的排球扣球轨迹提取方法及教学

有助于分析排球扣球技术，提高扣球质量，提取排球扣球轨迹。本文研究了基于无线传感器网络的排球扣球轨迹的提取方法和教学方法。加速度传感器和陀螺仪传感器用于收集排球运动员扣球动作状态信息。采集到的信息通过无线传感器网络，包括物理层、数据链路层、网络层、传输层和应用层，采用LEACH聚类路由协议算法传输到PC端。在PC端，采用反馈滤波方法对接收到的信息进行预处理，计算各传感器节点加速度的积分，连接各个时间点的空间坐标，得到三维空间的上肢轨迹，实现排球扣球动作的轨迹提取。实验结果表明，位置误差小于0.01 m，速度误差小于0.15 m/s。该方法在排球教学中的应用，可有效提高排球教学质量。