3 ms·
How does it know which tooth you’re cleaning?
by cal85 2y ago
How does it know which tooth you’re cleaning?
- stavros 2y agoProbably an accelerometer.
- lupusreal 2y agoI could see that working if your head is locked in a vise, but otherwise that's hard to believe.
- TeMPOraL 2y agoThere's only so much maneuvering space, and so much time a single brushing session takes; perhaps the error of double integration is small enough they can get away with dead reckoning. Especially since you mouth is a small, confined space, so they could estimate its bounds and use that to further correct their position estimate. (I imagine a system like this would need at least two accelerometers - one close to the tip, and another one in the grip area; the second one would be used to cancel out the movement of users' head and body, allowing the first one to effectively operate in a mouth-relative coordinate system.)
- stavros 2y agoIt's probably not going to be accurate to a single tooth, but to a region.
- BobAliceInATree 2y agoOnce you've moved the brush around a little bit, it can probably make a basic 3d map of you teeth to do the job.
- fennecfoxy 2y agoI think it would be quite accurate if you parse based on training data, think about how we brush our teeth and the relatively consistent and unique angles and accelerations. Maybe not from brushing one tooth but brushing the whole mouth you'd get a pretty good picture I'd say. The app would justify itself if it did give you a rough map of how you brushed your teeth and suggest areas that you're missing/if it's being done incorrectly.
- reaperducer 2y agoHow does it know which tooth you’re cleaning? How does it even have a census of your teeth? Some people have wisdom teeth, while other people don't. Some people have been on the losing end of a bar fight with carneys, and some people haven't.