RT @drkeithsiau: Dyson’s new CameraJet toothbrush is a true feat of engineering, using AI to brush and floss simultaneously. Its intraoral camera spots gaps between teeth to fire a precision jet of mouthwash into these gaps.
Developed over 6 years of research and trained using >470,000 dental images, the trained algorithm receives images from a 100,000 pixel, 1mm macro intraoral camera and is designed to identify, track and predict interdental gaps.
During use, it analyses 28 frames/second and can trigger the fluid jet within 100 ms of detecting a gap. A stroboscopic light operates at 257Hz, deliberately out of phase with the rapidly moving brush head, to obtain interpretable images despite motion.
Plaque mechanics also factored into the design. Dyson collaborated for 5 years with the University of Singapore’s Faculty of Dentistry to develop a lab model that mimicked dental plaque to permit repeated bench testing. Engineers used the model to optimise the geometry and fluid dynamics of the jet, leading to a conventional narrow/needle jet which punctures the model plaque, and a second broader conical jet to sweep plaque away over a larger area at lower pressure.
The toothbrush of the future has well and truly arrived! 🙇🏻♂️🪥🦷
中文: RT @drkeithsiau:戴森新款CameraJet牙刷是一项真正的工程技术,同时利用人工智能进行刷牙和牙线处理。其内摄摄像头可在牙齿间隙处射出,将精密漱口水射入这些缝隙中。
经过6年的研究,并使用超过47万张牙科图像进行训练,该经过训练的算法接收来自10万像素、1毫米微距内摄像的图像,并用于识别、追踪和预测牙间间隙。
使用过程中,可分析28帧/秒,并可在100米范围内触发流体喷射,以探测间隙。频闪灯在257Hz时运行,故意与快速移动的刷头相位,以在运动时获得可理解的图像。
猾体力学也考虑到了设计中。戴森与新加坡大学牙科学院合作了五年,共同开发了一种模拟牙菌斑的实验室模型,以允许重复进行长凳检测。工程师利用该模型优化了喷气式飞机的几何形状和流体动力学,形成了一种传统的窄/针射流,该射流会刺破模型的标牌,并在较低压力下,将第二个较宽的锥形喷流从更大的区域中清除。
未来的牙刷已经真正地到来了!🙇🏻 ♂🪥🦷