Towards a Decentralized Magnetic Indoor Positioning System

Sensors

Zakaria Kasmi¹  Abdelmoumen Norrdine²  Jörg Blankenbach²  Kourosh Khoshelham² 

[1] Institute for Computing in Civil Engineering & Geo Information Systems, Rheinisch-Westfälische Technische Hochschule Aachen University, Mies-van-der-Rohe-Str. 1, Aachen 52074, Germany

关键词: synchronization;    architecture;    real-time clock;    RTC;    RIOT-OS;    DS3234;    TDMA;    real time;    periodic tasks;    embedded system;   

DOI  :  10.3390/s151229799

来源: mdpi

【 摘 要 】

Decentralized magnetic indoor localization is a sophisticated method for processing sampled magnetic data directly on a mobile station (MS), thereby decreasing or even avoiding the need for communication with the base station. In contrast to central-oriented positioning systems, which transmit raw data to a base station, decentralized indoor localization pushes application-level knowledge into the MS. A decentralized position solution has thus a strong feasibility to increase energy efficiency and to prolong the lifetime of the MS. In this article, we present a complete architecture and an implementation for a decentralized positioning system. Furthermore, we introduce a technique for the synchronization of the observed magnetic field on the MS with the artificially-generated magnetic field from the coils. Based on real-time clocks (RTCs) and a preemptive operating system, this method allows a stand-alone control of the coils and a proper assignment of the measured magnetic fields on the MS. A stand-alone control and synchronization of the coils and the MS have an exceptional potential to implement a positioning system without the need for wired or wireless communication and enable a deployment of applications for rescue scenarios, like localization of miners or firefighters.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.