Estimating Step Distance Using Simple Harmonic Motion

Abstract

Some prior studies proposed the use of Pedestrian Dead Reckoning (PDR) for indoor localization. The PDR system does not require a beacon-based infrastructure, in which a small number of sensors are put on the pedestrian. These sensors (such as G-sensor and Gyro) are used to estimate the distance and direction that the user traveled. The PDR approach can be generally categorized into two types: foot-mounted and waistmounted. In general, the foot-mounted system can get accurate step length, but perform poorly in estimated heading direction.
On the other hand, the waist-mounted system can estimate direction with high accuracy, but is hard to measure the step length. In this work, we proposed a waist-mounted based PDR to
estimate step length using one 3-axis accelerometer. We utilize vertical acceleration to implement double integral for measuring the user’s instant height change and use some physical features of vertical acceleration during the walking to calibrate the measurement. Based on the Pythagoras’ Theorem, we can then estimate each step length based on the user’s height change
during his/her walking.

Citation

Kun-chan Lan and Chen-Yuan Li "Improving TCP Performance over an On-board Multi-homed Network," in IEEE Wireless Communications and Networking Conference (WCNC), Paris, France, April, 2012

Bitex

@ARTICLE{lan2012:ETC,
AUTHOR = {Kun-chan Lan and Chen-Yuan Li},
TITLE = { Estimating Step Distance Using Simple Harmonic Motion },
BOOKTITLE = { 2012 IEEE 75th Vehicular Technology Conference (VTC2012-Spring) },
MONTH = {May},
YEAR = {2012}
}

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