2020 Volume 7 Pages 59-67
In this research, we propose the oral care simulator using a force sensor. The basic algorithm of measuring contact point and brushing force were constructed. In the proposed simulator, only one force sensor is installed at the bottom of the oral model. Therefore, it is possible to reduce the number of signal wiring and sensors compared with a previous oral care simulator. Firstly, focusing on a line of action of force and shape of oral model, the locations that can be the contact point are calculated. Next, the direction of the force and the velocity at each candidate of contact point are compared, and these points are narrowed down to the theoretically possible contact points. Finally, the brushing force at the contact point is derived and feed back to the user. The prototype of oral care simulator was produceted, the proposed algorism was experimentally verified. The results show that the contact point of brush can estimated, normal and tangential force could be measured. In the next step of research, we will improve the measurement accuracy of simulator, and then the full system of oral care simulator will be developed.