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using an Accelerometer to determine position — Parallax Forums

using an Accelerometer to determine position

atstew01atstew01 Posts: 6
edited 2009-02-11 23:25 in BASIC Stamp
I am trying to build a robot that can self navigate and i want to use an accelerometer as a way to determine postiton by using a computer program to continuously intergrate measured acceleration into positon along each axis. is it possible to do this with the accelerometers available·through parallax and has anyone evertried to do this before?

Comments

  • SRLMSRLM Posts: 5,045
    edited 2009-02-11 17:06
    Look in the Advanced Sensors book (in the downloads section of the parallax website) for an example.
  • Craig EidCraig Eid Posts: 106
    edited 2009-02-11 23:25
    Since you will be performing a double integration you will have two error terms that you will need to remove via calibration and you will need to determine if the sensor you are using has·sufficient·bandwidth.

    The accuracy of your measurement is highly dependent on the acqusition time of the measurement. The Memsic will not work since the width of the output pulse varies with acceleration and it is a relativly slow part with a 30Hz bandiwdth. The Hitachi part has·sufficient·bandwidth but·you will need to reduce the 200 msec pause that is used in the application note.

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    Craig Eid

    www.TriadRD.com
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