Degrees of freedom: Difference between revisions
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In (electronic) sensors, the same idea amounts to the amount of independently sensed | In (electronic) sensors, the same idea amounts to the amount of independently sensed things. They do not have to be related, but when part of a single IC they often are | ||
: a 6DOF motion sensor often means a 3D accelerometer and 3D gyroscope | : a 6DOF motion sensor often means a 3D accelerometer and 3D gyroscope | ||
: In that context, a 9DOF may well be that plus 3 magnetic field sensors | : In that context, a 9DOF may well be that plus 3 magnetic field sensors | ||
: a lot of different sensors would be 1, 2, or 3DOF. There happen to be fewer that get up to 6 or 9, and they're regularly the above | : a lot of different sensors would be 1, 2, or 3DOF. There happen to be fewer that get up to 6 or 9, and they're regularly the above | ||
Note that they might report more, e.g. some simplified things (amount of acceleration in general), synthesize/filter some more (e.g. figure out where gravity is whenever it's not accelerating) possibly using [[sensor fusion]]. | |||