基于Kinect的罚篮技术动作辅助训练方法研究  

Research on auxiliary training method of free throw technique based on kinect

作　　者：林雪云[1] LIN Xueyun(Zhangzhou Institute of Technology,Zhangzhou,Fujian 363000,China)

机构地区：[1]漳州职业技术学院,福建漳州363000

出　　处：《闽南师范大学学报（自然科学版）》2021年第4期97-103,共7页Journal of Minnan Normal University：Natural Science

摘　　要：为了解决现有方法在篮球辅助训练中的罚篮技术动作捕捉精度低、训练后的罚篮稳定性差等问题,提出了基于Kinect的罚篮技术动作辅助训练方法.基于篮球运动图像坐标系和世界坐标系的比值,得到篮球的出手速度,利用篮球出手速度与出手角度的关系,计算篮球抛出角度值,利用摄像机与罚篮技术动作图像之间的平面距离,计算出运动员肘关节与肩关节之间的长度,将图像分割法应用到运动员罚篮技术动作监测中,以此得到罚篮技术动作的投跳区域,监测篮球运动员在定投范围内的罚篮技术动作,利用Kinect捕捉器捕捉罚篮技术动作,通过建立运动员人体模型,得到罚篮技术动作中肌肉力矩与关节角之间的关系,根据篮球运动员各个关节的约束条件,计算出受力情况下髋踝骨的最大截面应力,以此为依据构建了罚篮技术动作辅助训练模型,实现罚篮技术动作的辅助训练.实验结果表明,所提方法不仅可以提高罚篮技术动作捕捉精度,还可以保证篮球的入篮速度和角度处于理论范围内,提高了运动员罚篮的稳定性.In order to solve the problems of low motion capture accuracy of penalty basket technology and poor stability of penalty basket after training in basketball auxiliary training,a penalty basket technology motion auxiliary training method based on Kinect is proposed.Based on the ratio between the basketball motion image coordinate system and the world coordinate system,the basketball release speed is obtained.The basketball throw angle value is calculated by using the relationship between the basketball release speed and the release angle.The length between the athlete's elbow joint and shoulder joint is calculated by using the plane distance between the camera and the action image of the penalty basket technology,The image segmentation method is applied to the athlete's penalty basket technical action monitoring,so as to obtain the throwing and jumping area of the penalty basket technical action,monitor the basketball player's penalty basket technical action within the fixed shooting range,capture the penalty basket technical action with Kinect catcher,and obtain the relationship between muscle torque and joint angle in the penalty basket technical action by establishing the athlete's human model,According to the constraint conditions of each joint of basketball players,the maximum section stress of hip and ankle under stress is calculated.Based on this,the auxiliary training model of penalty basket technical action is constructed to realize the auxiliary training of penalty basket technical action.The experimental results show that the proposed method can not only improve the motion capture accuracy of penalty basket technology,but also ensure that the basketball entry speed and angle are within the theoretical range,and improve the stability of players'penalty basket.

关 键 词：Kinect捕捉器 命中率 罚篮技术动作 动作捕捉 篮球运动员 

分 类 号：G824.3[文化科学—体育训练]