智能牙刷如何检测区域？

Question

最近我遇到了一款名为Kolibree on smart的产品，这是一种智能牙刷。从他们在网站上说的话来看，Kolibree似乎可以探测到每颗牙齿。我接触了一些手势识别和飞行动力学(滚动角，俯仰角，航向角，.)我认为这种产品需要使用的技术，但我搞不懂它如何能够准确地检测每颗牙齿？我认为我们可以用滚动角和俯仰角来检测左、右、上、下区域，也许用航向角度更精确一些。但每颗牙齿的精确性都超出了我的理解。有人能解释一下这件事吗？

谢谢,

泰德

Answer 1

从kickstarter的视频中可以看到：

• 加速度计
• 陀螺仪
• 磁强计

它们提供了设备的相对位置和绝对方向。

那么如何检测牙齿呢？我首先要说的是：

1. 齿形

- by brushing you can collect surface data of close proximity to brush
- but only when no significant surface movement is detected then
- this can differentiate tooth types by curvature shape/size
- so you have an idea in what part of jaw you are

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1. 振动

- spinning brush creates noise pulses in accelerometer readings
- these should be dependent on the movement and surface shape
- when linear movement is detected (you move brush from side to side)
- then the gaps between tooths will create measurable readings in acceleration
- this can be used to recognize relative tooth position

​

1. 角度约束

- when we brush teeth on the left/right side or up down of the mouth
- we hold the brush differently
- this can be also measured
- if overall angular position is within certain borders
- then we can assume which side of mouth are actually brushing

​

1. 当你把所有这些数据放在一起

- then we can improve the accuracy of tooth scan to better numbers
- also if some kind of calibration is used that can improve it more
- for example hold/click some button to start calibration
- and move around the mouth by specific calibration movement ...

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备注

一些必须记住的事情

• 左右手手握刷子的方式不同。
• 这也适用于机动dis功能(残疾人)。
• 缺失或弯曲的牙齿异常(以后可用作标记点)
• 我的猜测是通过添加照相机信息(例如，来自链接设备)。
• 对于头部/下巴位置的检测，可以更好地提高检测效果。