抄録
The purpose of this study is to measure the magnitude and direction of the fingertip contact force without any sensors between the object and the finger pad. The authors focus on the color change of each part of the nail from red to white depending on the magnitude and direction of the force applied to the finger pad and measure color distribution of the nail surface by optical sensor on the nail.In this paper, the authors install the sets of LED and photodiode in device and measure nail color distribution. From the distribution of color change of the nail, the direction of fingertip contact force is estimated with the primary calibration result of the relationship between color distribution and direction of the force.
