Skill Moisture Measurement by Contactless Electrostatic Charge Sensor

It is important to keep the skin condition healthy since the skin has a function to protect the body from various stimuli in the environment. The monitoring of the skin condition, especially, the amount of water in the stratum corneum which is one of the important indicators for evaluating the skin condition is required. The piupose of this research is to develop a contactless and simple skin moisture measurement system. In this paper, a new contactless electrostatic charged sensor for skin moisture measurement is proposed. The proposed sensor consists of the charge electrode and measurement electrode. The voltage is induced to the measurement electrode by which the proposed sensor approaches and releases the skin. The moisture is estimated by which the voltage depends 011 the water content of the skin. First, the charge structure of proposed sensor was evaluated. Next, the skin moisture measurement was demonstrated by the proposed sensor. As a result, it was found that the proposed sensor had a potential as contactless moisture sensor although there are some issues should be solved. © 2021 Institute of Electrical Engineers of Japan. All rights reserved.