基于手机传感器Phyphox的计步算法探究  

Research on Step Counting A lgorithm Based on Mobile Phone SensorI Phyphox

作　　者：姚星星 鲍冉 叶之凡 许嘉禾 熊子宇 YAO Xingxing;BAO Ran;YE Zhifan;XU Jiahe;XIONG Ziyu(School of Physics,Zhejiang University,Hangzhou 310027,China;Chu Kochen Honors College,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学物理学院,浙江杭州310027 [2]浙江大学竺可桢学院,浙江杭州310027

出　　处：《仪表技术》2023年第5期68-70,82,共4页Instrumentation Technology

基　　金：2022年浙江大学实验技术研究项目(SYBJS202205)。

摘　　要：利用手机传感器Phyphox中的加速度传感器,收集人体在正常行走过程中所产生的三轴加速度等数据,再通过波峰检测算法对不同的走路形态进行步数计算。以20 Hz作为取样频率,通过对不同行走姿势和手机不同放置位置进行数据采集,运用计算机算法进行处理,并与实际步数进行比较。以改变滤波条件等方式对算法进行优化,力求做到精准计步。最终采用波峰检测作为计步的检测算法,同时对其检测条件进行调整,结果表明,该方法能较准确地计算出不同形态的步数,对制成一种简单的计步器具有一定的参考价值。The acceleration sensor in the cell phone sensor Phyphox is used to collect the triaxial acceleration and other data generated by the human body during normal walking.The number of steps for different walking patterns are calculated through the wave peak detection algorithm.With 20 Hz as the sampling frequency,data are collected from dif-ferent walking gestures and dfferent mobile phone positions,processed by computer algorithms,and compared with the actual number of steps.The algorithm is optimized by changing filtering conditions and other ways to achieve accurate step counting.Finally,the peak detection is used as the step counting detection algorithm,and the detection conditions are adjusted.The results show that the method can accurately calculate the steps of different shapes,and has certain ref-erence value for making a simple pedometer.

关 键 词：手机传感器 三轴加速度传感器 计步算法 波峰检测 滤波 

分 类 号：TN92[电子电信—通信与信息系统] G633.7[电子电信—信息与通信工程]