Department of Human Movement and Sport Sciences, Università Degli Studi di Roma Foro Italico, Italy.
Gait Posture. 2012 Jun;36(2):316-8. doi: 10.1016/j.gaitpost.2012.02.019. Epub 2012 Mar 31.
This study introduces a new method of extracting initial and final contact gait time events from vertical acceleration, measured with one waist mounted inertial measurement unit, by means of continuous wavelet transforms. The method was validated on 18 young healthy subjects and compared to two others available in the literature. Of the three methods investigated, the new one was the most accurate at identifying the existence and timing of initial and final contacts with the ground, with an average error of 0.02±0.02 s and 0.03±0.03 s (approximately 2% and 3% of mean stride duration), respectively.
本研究提出了一种新的方法，通过连续小波变换，从一个腰部安装的惯性测量单元测量的垂直加速度中提取初始和最终接触步态时间事件。该方法在 18 名年轻健康受试者中进行了验证，并与文献中提供的两种方法进行了比较。在所研究的三种方法中，新方法在识别初始和最终接触地面的存在和时间方面最为准确，平均误差分别为 0.02±0.02 s 和 0.03±0.03 s（约为平均步幅持续时间的 2%和 3%）。
