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Indoor and underground
       orientation and
       navigation
       by using the barometer
       sensor

       Elizav...
Overview



      1. Problem statement for indoor orientation & navigation

      2. Application example: (Berlin) Undergr...
Problem statement for indoor orientation



       Do you need an (outdoor) navigator?
       1992: no
       2012: yes...
Application example: (Berlin) Underground



       Undergrounds are used by
        million people every day
       Man...
Approach with Barometer



          Cell-id Positioning in Undergrounds allows to define the line
           and a posit...
Data-collection


                                                                       Specialized app to
              ...
Analysis: Characteristics I



       Multiple underground train stations with filter
                                  S...
Analysis: Characteristics II



                                                               Underground Station




   ...
Conclusion



       Cellid positioning offers the underground line and an interval
        between 4-6 stations, which i...
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droidcon 2012: Indoor orientation in underground based on barometer, Roland Wagner, Beuth Hochschule für Technik Berlin Slide 1 droidcon 2012: Indoor orientation in underground based on barometer, Roland Wagner, Beuth Hochschule für Technik Berlin Slide 2 droidcon 2012: Indoor orientation in underground based on barometer, Roland Wagner, Beuth Hochschule für Technik Berlin Slide 3 droidcon 2012: Indoor orientation in underground based on barometer, Roland Wagner, Beuth Hochschule für Technik Berlin Slide 4 droidcon 2012: Indoor orientation in underground based on barometer, Roland Wagner, Beuth Hochschule für Technik Berlin Slide 5 droidcon 2012: Indoor orientation in underground based on barometer, Roland Wagner, Beuth Hochschule für Technik Berlin Slide 6 droidcon 2012: Indoor orientation in underground based on barometer, Roland Wagner, Beuth Hochschule für Technik Berlin Slide 7 droidcon 2012: Indoor orientation in underground based on barometer, Roland Wagner, Beuth Hochschule für Technik Berlin Slide 8 droidcon 2012: Indoor orientation in underground based on barometer, Roland Wagner, Beuth Hochschule für Technik Berlin Slide 9
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droidcon 2012: Indoor orientation in underground based on barometer, Roland Wagner, Beuth Hochschule für Technik Berlin

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Indoor orientation and navigation in buildings and underground public transport is still a challenge. A key problem is the determination of the levels, e.g. floors and platforms, especially in environments with large amount of balconies and more or less levitating escalators, lifts and stairs. Another desired application is navigation or at least orientation in public undergrounds, which is missing due to missing common available sensors. GPS is not available in tunnels. Wifi cells are very unusual at least in the Berlin underground environment. Infrastructure based sensors and communication would be able to solve a personal navigation, but requires investments. With the introduction of barometer as a sensor in the Android 2.3 API and the first available Android mobile phones with build-in barometer sensors (Xoom and Galaxy Nexus), pressure can be used to calculate altitudes or even more relevant to measure pressure differences, e.g. between building levels and stations. This talk is intended to give and get a feeling about the given accuracy and robustness in relation to indoor positioning for buildings and undergrounds and should report about the ongoing, but already promising experiments.

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droidcon 2012: Indoor orientation in underground based on barometer, Roland Wagner, Beuth Hochschule für Technik Berlin

  1. 1. Indoor and underground orientation and navigation by using the barometer sensor Elizaveta Karpakova, 3. Sem. Geoinformation Master mit Kaatz, Richter und Zimmermann (Geoality GbR), … und Prof. Dr. Roland-M. Wagner Droidcon 2012, Berlin, Urania, 14.3.2012
  2. 2. Overview 1. Problem statement for indoor orientation & navigation 2. Application example: (Berlin) Underground 3. Approach with Barometer 4. Data-collection 5. Analysis 6. Conclusion Beuth Hochschule für Technik Berlin – University of Applied Sciences 2
  3. 3. Problem statement for indoor orientation  Do you need an (outdoor) navigator?  1992: no  2012: yes  GPS is not usable for indoor orientation and positioning, other sensors are needed  Challenge: Change!  More Change in indoor environment, e.g. fairs, cons  Some privacy aspects, e.g. indoormaps only for welcomed visitors and not for everybody in the net; => local infrastructure  Additional indoor information needed, e.g. pics, contact, time, location => e-flyer  An early project is: openfloormap.org Beuth Hochschule für Technik Berlin – University of Applied Sciences 3
  4. 4. Application example: (Berlin) Underground  Undergrounds are used by million people every day  Many are tourists and need permanent orientation & navigation  Orientation needed also between stairs and stations  Frequent users might be interested e.g. for a wake- up app  Only a few underground CC-At-By Ingo http://www.flickr.com/photos/30184910@N06 operators offer an (open) interface Beuth Hochschule für Technik Berlin – University of Applied Sciences 4
  5. 5. Approach with Barometer  Cell-id Positioning in Undergrounds allows to define the line and a position between 4-6 stations  Underground stations have different altitudes due to crossings and surface  Barometer / pressure measurement is robust and does not require much energy  Moving train pressure change for station counting  Only deltas are needed  Absolute altitude calculation with weather service Beuth Hochschule für Technik Berlin – University of Applied Sciences 5
  6. 6. Data-collection Specialized app to capture the context Which line? Which direction Walking / Stairs Train movement Capturing of all smartphone available sensor data https://play.google.com/store/apps/details?id=de.geoality.activitys Beuth Hochschule für Technik Berlin – University of Applied Sciences 6
  7. 7. Analysis: Characteristics I  Multiple underground train stations with filter Sensor Pressure Filtered Pressure Beuth Hochschule für Technik Berlin – University of Applied Sciences 7
  8. 8. Analysis: Characteristics II Underground Station Pressure changes due to tunnel effects Beuth Hochschule für Technik Berlin – University of Applied Sciences 8
  9. 9. Conclusion  Cellid positioning offers the underground line and an interval between 4-6 stations, which is not suficient  Acceleration and pressure changes are characteristic enough to count stations  Pressure Delta between (multiple) stations can additional be used for absolute positioning  Very robust for determination of levels (underground stairs, buildings)  Currently only two android devices available (Xoom, Galaxy Nexus)  Apps, Data and Bachelor Thesis available Beuth Hochschule für Technik Berlin – University of Applied Sciences 9
  • niyalist

    Mar. 1, 2016

Indoor orientation and navigation in buildings and underground public transport is still a challenge. A key problem is the determination of the levels, e.g. floors and platforms, especially in environments with large amount of balconies and more or less levitating escalators, lifts and stairs. Another desired application is navigation or at least orientation in public undergrounds, which is missing due to missing common available sensors. GPS is not available in tunnels. Wifi cells are very unusual at least in the Berlin underground environment. Infrastructure based sensors and communication would be able to solve a personal navigation, but requires investments. With the introduction of barometer as a sensor in the Android 2.3 API and the first available Android mobile phones with build-in barometer sensors (Xoom and Galaxy Nexus), pressure can be used to calculate altitudes or even more relevant to measure pressure differences, e.g. between building levels and stations. This talk is intended to give and get a feeling about the given accuracy and robustness in relation to indoor positioning for buildings and undergrounds and should report about the ongoing, but already promising experiments.

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