GNSS World of China

Volume 43 Issue 5
Oct.  2018
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JIANG Congshi, LIU Jiaxing. An Indoor Geomagnetic Positioning System Based on Smartphone[J]. GNSS World of China, 2018, 43(5): 9-16. doi: 10.13442/j.gnss.1008-9268.2018.05.002
Citation: JIANG Congshi, LIU Jiaxing. An Indoor Geomagnetic Positioning System Based on Smartphone[J]. GNSS World of China, 2018, 43(5): 9-16. doi: 10.13442/j.gnss.1008-9268.2018.05.002
shu

An Indoor Geomagnetic Positioning System Based on Smartphone

doi: 10.13442/j.gnss.1008-9268.2018.05.002
  • 1.

    Wuhan University, School of Remote Sensing and Information Engineering, Wuhan 430072, China

  • 2.

    Engineering Technology Research Center of Geo Spatial Information and Digital Technology in National Administration of Surveying, Mapping and Geo Information, Wuhan 430079, China

  • Publish Date: 2018-10-15
    Abstract
  • After studied smartphone’s sensors and indoor magnetic field, an indoor localization system based on Client／Server architecture is designed. With the three axis fluxgate geomagnetic sensor, we can collect geomagnetic signals and establish fingerprint in two different ways: coordinate transformation of the three axis geomagnetic data with the assist of the data of gyroscope; combination of geomagnetic data and azimuth information. Then, generate the grid map as the indoor positioning reference map, and design geomagnetic matching algorithm based on euclidean distance. Finally, the application is deployed on the Android platform and experiments are conducted, then compare accuracy and matching speed in different location fingerprint. The experimental results show that the system can achieve a positioning accuracy of 1m.

     

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