针对目前越野滑雪运动教练员对于撑杖数据量化的需求,设计了一种越野滑雪撑杖计数算法。通过快速傅里叶变换(FFT)分析窗口内撑杖数据的特征频率,再设置数据的特征频率为低通滤波的截止频率,对信号进行滤波处理。将窗口内信号邻近峰谷差值的均值作为阈值,用以区分撑杖动作的波形和杂峰,并对撑杖动作进行计数。设定有效撑杖动作波形的波峰时间间隔范围为0.8~2.5 s
Finn Marsland,Keith Lyons,Judith Anson,Gordon Waddington,Colin Macintosh,Dale Chapman.Identification of Cross-Country Skiing Movement Patterns Using Micro-Sensors[J].Sensors,2012.
Zhang, Y.,McEwen, R. S.,Ryan, J. P.,Bellingham, J. G..Design and Tests of an Adaptive Triggering Method for Capturing Peak Samples in a Thin Phytoplankton Layer by an Autonomous Underwater Vehicle[J].IEEE Journal of Oceanic Engineering: A Journal Devoted to the Application of Electrical and Electronics Engineering to the Oceanic Environment,2010.