基于MEMS传感器的运动轨迹的追踪系统

摘要

A pedestrian motion trail tracking system based on MEMS inertial sensor was designed. According to the princi⁃ple of pedometer,the acceleration sensor is directly used to measure and record the acceleration’s changing waveform of pedes⁃trian pace,the three⁃axis magnetometer is employed to detect the motion direction of the pedestrian,and the acceleration magni⁃tude is adopted to compensate the inclination. The method of smoothing filtering is used to filter the measured results. The micro⁃processor is used to process the original data to obtain the pedestrian’s accurate step number and motion direction. The effective⁃ness and feasibility of the system was verified by experiments.%设计一种基于MEMS惯性传感器的行人运动轨迹的追踪系统。测量方式采用计步器的原理，直接利用加速度传感器来检测记录行人步伐的加速度的变化波形，采用三轴磁力计检测行人的运动方向，同时采用加速度值对方向进行倾角补偿。采用平滑滤波的方法对测量结果滤波，通过微处理器处理原始数据，得到比较准确的行人步数和运动方向。最后通过实验验证系统的有效性和可行性。