A Novel Three-Dimensional Positioning Method for Foot-Mounted Pedestrian Navigation System Using Low-Cost Inertial Sensor

被引:4
|
作者
Xie, Dongpeng [1 ]
Jiang, Jinguang [2 ]
Yan, Peihui [2 ]
Wu, Jiaji [2 ]
Li, Yuying [2 ]
Yu, Ziyan [3 ]
机构
[1] Wuhan Univ, Elect Informat Sch, 129 Luoyu Rd, Wuhan 430079, Peoples R China
[2] Wuhan Univ, GNSS Res Ctr, 129 Luoyu Rd, Wuhan 430079, Peoples R China
[3] Wuhan Univ, Sch Comp Sci, 129 Luoyu Rd, Wuhan 430079, Peoples R China
关键词
pedestrian navigation system; three-dimensional positioning; lateral velocity restriction algorithm; stair step height; gait characteristics; ACCURATE; FUSION; IMU;
D O I
10.3390/electronics12040845
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Aiming at the problem that position errors accumulate rapidly in foot-mounted pedestrian navigation systems using a low-cost inertial sensor, a novel three-dimensional (3D) positioning method is proposed. First, when the foot is still, an improved zero velocity detection method that assigns different weights to each inertial measurement unit (IMU) data in a sliding window is designed to reduce positioning errors. When the foot is in swing, a lateral velocity restriction method is proposed by analyzing the gait characteristics of pedestrians. In addition, when pedestrians need altitude positioning in the building, the stair step height is also applied to the zero-velocity update (ZUPT)-aided inertial navigation system, which can effectively improve altitude positioning accuracy. Experiments under multi-gait modes show that the proposed zero velocity detection method can achieve smaller positioning errors compared with other traditional zero velocity detection methods. Moreover, the trajectory estimated by the proposed method has a higher coincidence with the real trajectories, the two-dimensional (2D) plane positioning error is less than 0.9% and the average altitude positioning error is only 0.12 m.
引用
收藏
页数:13
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