Analysis of Finger Movement using Accelerometer Sensor

摘要

Human uses the sight and the tactile sensations to evaluate the hand of goods. Especially, the tactile sensation is theimportant factor to decide the hand of something. When human evaluates the hand of goods, the physical and physiological phenomena, e.g. applied force, speed of finger movement, touching time, contact area and distance of finger movement, are occurred by the finger movement. They also use a special finger movement according to the purpose of their evaluation. Such sensory evaluation includes resilience, roughness, flexibility and softness. We observed and compared the finger movements of both high sensitive users and low sensitive users. We used a glove type measurement system with accelerometer sensor to investigate the characteristics of finger movement while evaluating a hand of fabric. Subjects who consisted of high sensitive users and low sensitive users wore this measurement system on their right hand with their eyes closed, and evaluated a piece of non woven fabric. The sensors provided data on the direction of finger movement as its patterns. This allowed us to identify and analyze the differences between high sensitive users and low sensitive users. And it shows that the finger movement varied according to the user's ability to discriminate, with high sensitive user's finger movement being better suited to sensory evaluation. As the result, human had particular movement to evaluate the hand of fabric. This particular movement meant finger moved rectilinearly in some point. It was found that the rectilinear finger movement was the important factor to improve the discrimination ability in evaluating the hand of fabric.