Convert raw data (bits) into volts using the formula: Data(V) = data(Bits) /4095(Bits) * 3V Then look at the accelerometer datasheet. Doublecheck the accel voltage test condition on the datasheet and scale the amplitude accordingly if needed.
The measurement you mention (800mV/1G would be in reference to a zero-output level which is typically at VDD/2 or 1.5V on a Shimmer. For more information see the calibration guide and documentation on the Shimmer website. Commodity MEMs accelerometers have significant offset and gain. It is best to use manual methods or the calibration application to correct for these. -Ben On Sat, May 19, 2012 at 9:25 AM, Maxim Michel <[email protected]> wrote: > What does the raw data obtained by the accelerometer (value around 2000) > represent exactly? > Are these the amplitudes in mV which can be converted into G-forces? > I've read in the accelerometer datasheet every 800mV represents 1G at a > measuring range of 1.5G. > Is this the correct interpretation? > > Thanks > > > > _______________________________________________ > Shimmer-users mailing list > [email protected] > https://lists.eecs.harvard.edu/mailman/listinfo/shimmer-users > _______________________________________________ Shimmer-users mailing list [email protected] https://lists.eecs.harvard.edu/mailman/listinfo/shimmer-users
