上下に磁界センサを分離した顎運動計測システムによる6自由度計測

摘要

We developed a jaw-tracking system consisting of two magnets and biaxial fluxgate sensors. One magnet is fastened to a tooth in the bottom jaw of the subject and another is fastened to the subject's forehead. The system can naturally detect movement of the jaw as a rigid body. We fabricated sensor arrays with separate upper and lower parts in order to obtain good position accuracy. Positional accuracy to within 0.1 mm was achieved as a rigid body using a jaw model. Six degrees of freedom and 100 Hz sensing cycles were achieved using one rigid marker (composed of two magnets), and achieved position accuracy to within 0.3 mm.