Re: [android-developers] Re: android accelerometer to measure distance

ok tom thanks for reply.. tom i just want to measure near distance , just 20 cm or 30 cm.. can u give me idea? how if i use proximity sensor?

On Thu, Jan 26, 2012 at 1:07 AM, TomL <tomlouie@gmail.com> wrote:

http://en.wikipedia.org/wiki/Kinematics#Displacement 

Acceleration is delta velocity over delta time.  Velocity is delta position over delta time.  If you can accurately sample the acceleration values over a period of time, you could calculate the changes in velocity and therefore the overall change in position.

In practice, I don't think that smartphone accelerometers are anywhere near as accurate as you'd need to be able to do this.  If they were, smartphones would cost as much as missile guidance systems.

Tom

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