LI Jin-feng, WANG Qing-hui, LIU Xiao-mei, et al. Pedestrian dead reckoning system based on MEMS inertial sensor[J]. 2014, 33(12): 85-87+90. DOI: 10.13873/J.1000-9787(2014)12-0085-03.
A pedestrian dead reckoning(PDR) system based on low-cost MEMS self-contained sensor is proposed
which can collect and process datas autonomously.Hardware platform integrates three-axis accelerometer
three-axis gyroscope
three-axis digital compass and barometer.no any additional facilities are required.Through self-contained sensor measure step-length
bearing and altitude of the pedestrian to achieve three-dimensional indoor and outdoor positioning.The acceleration signal is utilized to realize stride detection and step length estimation.A ’complementary filter is used to fuse datas from accelerometer
gyroscope and digital compass to correct measurement error of gyroscope and impact of magnetic field interference on digital compass and improve bearing precision.Test results illustrate that positioning error of the system is less than 4%of total traveled distance
which meets requirements of pedestrian positioning.The effectiveness and reliability of the system are validated.