G-Force Calculation

Question

I have used this code to get the G-Force value. But the problem is When I keep my iPhone on table still it show 0.99 value.Can any one tell me the reason? Code is

sx = acceleration.x * kFilteringFactor + sx * (1.0 - kFilteringFactor);
sy = acceleration.y * kFilteringFactor + sy * (1.0 - kFilteringFactor);
sz = acceleration.z * kFilteringFactor + sz * (1.0 - kFilteringFactor);

float aValue = sqrt(sx*sx+sy*sy+sz*sz);

[gLabel setText:[NSString stringWithFormat:@"%.2f",aValue]];

score 0 · Answer 1 · answered Oct 16 '12 at 12:40

At least in Android that is correct and is because of Gravity. The only way to get 0 would be in a free fall. IF it is on a table then there is a force applied to "not be falling" which is of the same magnitude of the Gravity (1G) and oppose direction.

G-Force Calculation

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