CapLoc: Capacitive Sensing Floor for Device-Free Localization and Fall Detection
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Date
2020-10-12
Open Access Location
Authors
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Journal ISSN
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Publisher
IEEE Xplore
Rights
The Author(s) CC BY
Abstract
Passive indoor positioning, also known as Device-Free Localization (DFL), has applications such as occupancy sensing, human-computer interaction, fall detection, and many other location-based services in smart buildings. Vision-, infrared-, wireless-based DFL solutions have been widely explored in recent years. They are characterized by respective strengths and weaknesses in terms of the desired accuracy, feasibility in various real-world scenarios, etc. Passive positioning by tracking the footsteps on the floor has been put forward as one of the promising options. This article introduces CapLoc, a floor-based DFL solution that can localize a subject in real-time using capacitive sensing. Experimental results with three individuals walking 39 paths on the CapLoc show that it can detect and localize a single target's footsteps accurately with a median localization error of 0.026 m. The potential for fall detection is also shown with the outlines of various poses of the subject lying upon the floor.
Description
Keywords
Capacitive sensing, device-free localization, electric field sensing, fall detection, footstep detection, footstep tracking, human sensing, indoor localization, indoor positioning system (IPS), passive positioning
Citation
IEEE ACCESS, 2020, 8 pp. 187353 - 187364