Abstract
In our works, a human skin scratching monitoring system has been developed in order to evaluate the itch sensation. For the purpose, finger posture is one of important information. In order to obtain the finger posture, a simple sensor system using a polymer sensor is proposed. The polymer sensor is composed of ionic liquid and solid polymer electrolyte. The sensor output is corresponding to the deformed curvature in sensor. Firstly, frequency response of the polymer sensor is investigated. It was found that the sensor output slightly decreases with the increase in the deformation frequency and that hysteresis loop enlarges with increase of the frequency. Next, a scratch motion sensor is fabricated. It has a simple structure that the polymer sensor is attached on the finger joint by using a net bandage. Then, Relationship between finger bending angle and sensor output is investigated. From the comparison between sensor output and the bending angle, it is observed that sensor output has a good agreement with the finger bending angle. As a result, it is found that the polymer sensor is available to measure the finger bending during scratching.
