09
Feb
10

Accelerometer


Have (rather had, before it got stolen) an ipod touch on which I played super games. Thanks to the accelerometer.

I could move the pac-man just by tilting the iPod. I could play bowling by holding the iPod in one hand and then doing the bowling action. All this, thanks to an accelerometer inside. What is an accelerometer?

An accelerometer is a device that measures proper acceleration (speed and direction, remember!!!); the acceleration it experiences relative to freefall.

An accelerometer measures proper acceleration which is the acceleration it experiences relative to freefall, and is the acceleration that is felt by people and objects. Put another way, at any point in spacetime the equivalence principle guarantees the existence of a local inertial frame, and an accelerometer measures the acceleration relative to that frame.

Conceptually, an accelerometer behaves as a damped mass on a spring. When the accelerometer experiences an acceleration, the mass is displaced to the point that the spring is able to accelerate the mass at the same rate as the casing. The displacement is then measured to give the acceleration.

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Another attempt? Well yes. Attempting to figure out another sustainable model (there are some other attempts going on parallel-ly). Well, we have a lot of questions in mind. we read up stuff, we do some research to find answers to these questions. This is an attempt to publish that little 15-20 minute research.

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