基于离散小波变换的跳板跳水起跳技术分析方法

为了从跳板响应曲线中了解跳水运动员的起跳状态，通过对跳板在蹬力作用下运动过程的分析，采用了离散小波分解信号，并对时频小波变换相关算法进行改进，只对能量集中的低频逼近信号进行相关估计，避免了高频干扰。结果表明．本文提出的方法能准确地检测出运动员离板的时刻及起跳加速度和速度，为跳水训练提供了依据，具有较强的可行性和实用性。

A Study on Analysis Jumping Skill in Spring Board Dive Based on Discrete Wavelet Transform

In order to acquire the diving condition of springboard athlete from response curve, the movement of springboard under the impulsive force of athlete was analyzed, and then discrete wavelet was used to decompose the signal in this paper. Moreover, the algorithm of correlation based on time -frequency wavelet was improved to estimate the relative coefficients of similar signal in low frequency phase, which concentrated most energy, so the interference of high frequency was avoided. The result indicated that the moment when athlete takes off springboard can be found out, as well as jumping acceleration and velocity. It is also showed in this paper that the method, which is helpful to diving training, is feasible and practical.