4 ms·
How does it know the location you are brushing?
by progbits 3y ago
How does it know the location you are brushing?
- zelphirkalt 3y agoBluetooth from the teeth! It is in the name ; )
- jhbadger 3y agoHa! But presumably the bluetooth is there to tell the app what it measured and to visualize it. But presumably through a combination of sensors and accelerometers
- quenix 3y agoI would presume a bunch of IMUs and fusing together orientation/accel data? I can see how knowing the orientation and relative motion of the head might allow one to map this out.
- progbits 3y agoI assume you mean the head of the toothbrush but what about my head? The IMU data is relative to earth (kinda). But toothbrush position over teeth is relative to my head. Moving around and turning your head gets added to the IMU measurements with no way to tell it apart. Did I turn my head/body 90 degrees left, or did I move the toothbrush 90 degrees from my front teeth to the rear left ones? Impossible to tell these apart.