基于MEMS的步态信号采集实验教学装置  

Gait Signal Acquisition Experimental Teaching Device Based on MEMS

作　　者：陈东毅[1,2] 陈建国[1,2] 李玉榕[1,2] 段小华[1] CHEN Dong-yi;CHEN Jian-guo;LI Yu-rong;DUAN Xiao-hua(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;Fujian Key Lab of Medical Institute and Pharmaceutical Technology,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108 [2]福州大学福建省医疗器械和医药技术重点实验室,福建福州350108

出　　处：《电气电子教学学报》2020年第4期143-148,共6页Journal of Electrical and Electronic Education

基　　金：国家自然科学基金资助项目,自主意愿控制的运动功能康复功能性电刺激技术基础研究(61773124);福建省教育厅科研资助项目,足下垂的功能性电刺激助行仪控制技术研究与仪器研发(JAT170109);福州大学一流本科教育教学改革研究项目(FDJG20190030)。

摘　　要：本文设计了一个stm32平台下的微电子机械系统(MEMS)传感器步态信号采集实验教学装置,通过软件滤波与仪器标定的方法消除了该装置的测量误差。对8例志愿者步态信号分析得到对比滤波前后步态信号角度、角速度及角加速度的均方根误差,它们分别降到0.5o、0.02o/s、0.006o/s2以内,信噪比分别提高到44dB、55dB、5.9dB以上。该装置具有一定的通用性与可扩展性,为创新实验课程建设做出了积极的探索与实践。In this paper,a gait signal acquisition experimental teaching device based on MEMS sensor on STM32 is designed.The measurement error of this device is eliminated by software filtering and instrument calibration.After analyzing the gait signal of 8 volunteers,it is found that the RMS errors of gait signal angle,angular velocity and angular acceleration before and after filtering are reduced to less than 0.5o,0.02o/s and 0.006o/s2,respectively,and the SNR are increased to more than 44dB,55dB and 5.9dB.The device has certain universality and expandability which can make active practice for the construction of innovative experimental courses.

关 键 词：微电子机械系统 步态信号 软件滤波 测量误差 

分 类 号：R318[医药卫生—生物医学工程] G642.0[医药卫生—基础医学]