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Accelerometer

Discussion in 'Electronic Basics' started by john, Dec 11, 2008.

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  1. john

    john Guest

    Hi,

    I am planing to use an analog accelerometer ( ADXL330KCPZ) in a
    project. And i have following questions

    1. The accelerometer will place flat on the table. How can I get or
    calculate the angle information from the three outputs of the
    accelerometer? I will read the outputs via 12 bit analog to digital
    converter. So, there will be three numbers of 12 bit data.

    2. How can I calbriate the readings? For example, the accelerometer
    is no longer on the flat table but installed on the wall, the
    reference has changed.


    Please advice!

    Thanks
    John
     
  2. Sjouke Burry

    Sjouke Burry Guest

    You have to integrate 3 signals twice, and end up with a highly
    unstable signal drifting all over the place.
    Also you have to add 2 gyros, and integrate those once.
    Airplanes use this, and those platforms cost ~ 100.000 dollars,
    to get the needed accuracy/stability.
     
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