Accurate Stride-Length Estimation Based on LT-StrideNet for Pedestrian Dead Reckoning Using a Shank-Mounted Sensor

Pedestrian dead reckoning (PDR) is a self-contained positioning technology and has been a significant research topic in recent years. Pedestrian-stride-length estimation is the core part of the PDR system and directly affects the performance of the PDR. The current stride-length-estimation method is...

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Bibliographic Details
Published in:Micromachines (Basel) 2023-05, Vol.14 (6), p.1170
Main Authors: Li, Yong, Zeng, Guopei, Wang, Luping, Tan, Ke
Format: Article
Language:English
Subjects:
Accelerometers
Accuracy
Algorithms
Calibration
Dead reckoning
Dead reckoning (Navigation)
Deep learning
Extended Kalman filter
inertial measurement unit (IMU)
Kalman filter
Location-based systems
Methods
Microelectromechanical systems
Natural language processing
Neural networks
pedestrian dead reckoning
Pedestrians
Sensors
stride-length estimation
Transformer model
Velocity
Walking
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Summary:Pedestrian dead reckoning (PDR) is a self-contained positioning technology and has been a significant research topic in recent years. Pedestrian-stride-length estimation is the core part of the PDR system and directly affects the performance of the PDR. The current stride-length-estimation method is difficult to adapt to changes in pedestrian walking speed, which leads to a rapid increase in the error of the PDR. In this paper, a new deep-learning model based on long short-term memory (LSTM) and Transformer, LT-StrideNet, is proposed to estimate pedestrian-stride length. Next, a shank-mounted PDR framework is built based on the proposed stride-length-estimation method. In the PDR framework, the detection of pedestrian stride is achieved by peak detection with a dynamic threshold. An extended Kalman filter (EKF) model is adopted to fuse the gyroscope, accelerometer, and magnetometer. The experimental results show that the proposed stride-length-estimation method can effectively adapt to changes in pedestrian walking speed, and our PDR framework has excellent positioning performance.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi14061170