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I am collecting data coming from accelerometer and gyrospcope sensor on my Smartwatch: Samsung Gear 2 . The development environment is: Tizen SDK for Wearable Version 1.0.0.

The javascripts code used is:

window.addEventListener("devicemotion",deviceMotionEvent,true);

function deviceMotionEvent(e) {

Ax = e.accelerationIncludingGravity.x / 9.8,
Ay = e.accelerationIncludingGravity.y / 9.8,
Az = e.accelerationIncludingGravity.z / 9.8,

Wx = e.rotationRate.alpha,
Wy = e.rotationRate.beta,
Wz = e.rotationRate.gamma;

}

The problem: While acceleration data seem to be correct (sampling frequency about 25 Hz) the rotation rate along the alpha,beta,gamma axis presents an anomaly: the sampling rate is very low (1.0 Hz). The same value of Wx,Wy,Wz is repeated 25 times given that the deviceMotionEvent is fired at 25 Hz.

I have not intercepted any document including the gyro sensor specifications (any suggestion is welcome) but I would understand if 1.0 Hz for the gyro has to be considered an anomaly or the correct functioning.

V

genoveseV
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  • What is you precise question?:) – veritas Feb 13 '15 at 12:54
  • A sampling rate approximately equal to 1.0 Hz , for the gyro has to be considered an anomaly or the correct functioning? I did not found any Samsung's document including this information. From my perspective 1 Hz is totally insufficient for any motion analisys. – genoveseV Feb 14 '15 at 18:23

0 Answers0