複数の測温部を設けた熱伝導式皮膚水分量センサの製作および評価

抄録

We proposed a skin moisture sensor with multiple temperature measuring parts for self-calibration. A resistance temperature detector (RTD) can be used for both heat source and temperature measurement. We fabricated a device with four RTDs to measure the skin moisture content. The temperature coefficients of resistance of the fabricated RTDs are almost the same. On the other hand, a fluctuation of temperature rise was, however, observed. Therefore, we proposed a method of self-calibration of the difference in the calorific value of the heat source by the temperature rise measured by the heat source. By using the proposed method, we showed that the temperature rise fluctuation measured by the resistance can be reduced.