In this article the authors introduce a GPS/dead-reckoning system which is based on a GPS receiver and dead-reckoning sensors for speed, acceleration, tilt angle and rotation. The outputs of the sensors are used to calculate an estimate for vehicle position between GPS fixes and during total satellite signal blockage. The positioning system consists of a measurement unit and a portable PC. Actual measuring device includes an embedded microcontroller system with high performance microcontroller, peripheral devices and sensor electronics. Included sensors are acceleration and tilt for both X-axes and Y-axes, magnetic compass for all axes, gyroscope for rotation sensing and temperature for calibration purposes. Collected data from GPS and sensors is pre-processed in the measurent unit and sent to the PC for further analysis. Digital counter measures wheel rotation and digital I/O:s sense vehicles braking and reversing, helping to understand datastream afterwards. The system was implemented and installed in a passenger car for testing purposes. As a result of intensive test the authors found all of the sensors capable to give valuable information about vehicle movements. In the tests they also analysed temperature stability and mechanical strenght of the system, in order to find it's usefulness in diffecult conditions. However, more tests are needed to complete the accuracy analyses.


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    Titel :

    Vehicle positioning using GPS and dead-reckoning sensors


    Beteiligte:
    Vuoristo, V.P. (Autor:in) / Kivikoski, M. (Autor:in)


    Erscheinungsdatum :

    1999


    Format / Umfang :

    8 Seiten, 8 Bilder, 5 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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