AVR/PIC uC to calculate 0-100kph and 100-0 using 2D accelerometer

[Adam Bradley]

Hi all!
I'm mucking about with an AVR/PIC uC and want to choose a suitable
accelerometer
(probably from Analog Devices - but please let me know of any suitable
alternatives!)
to give me good accuracy to calculate 0-62mph times, max lateral G force,
braking G's
etc

What I do need is for someone to point me in the right direction with
regards to how
I can calculate such things using only the accelerometer and a known car
weight?

TIA!
Adam

[Ian Stirling]

Adam Bradley > wrote:
> Hi all!
> I'm mucking about with an AVR/PIC uC and want to choose a suitable
> accelerometer
> (probably from Analog Devices - but please let me know of any suitable
> alternatives!)
> to give me good accuracy to calculate 0-62mph times, max lateral G force,
> braking G's
> etc

The accellerometer probably isn't quite good enough to give accurate
0-62mph times.
You may need to hook into the speedo cable for that.
G force measurement is easy, but integrating it is problematical.

> What I do need is for someone to point me in the right direction with
> regards to how
> I can calculate such things using only the accelerometer and a known car
> weight?

You shouldn't need to know the car weight unless you want to know force
on the tyres.

--
http://inquisitor.i.am/ | | Ian Stirling.
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