Development of Intraoral Electrostatic Energy Harvester Driven by Occlusal Force

Abstract

Mouthguard type sensors have been developed to monitor the biometric information. In order to realize battery-less intraoral sensors, we propose an intraoral electrostatic energy harvester driven by occlusal force. The proposed energy harvester consists of lamination of the electrodes, electret and dielectric elastomer. The energy harvester converts mechanical energy applied by occlusal force into electrical energy by electrostatic induction. In this study, we measured the relationship between the thickness of the electret and the power generation. The experimental results showed the electret of 10 μm thickness was suitable for the proposed energy harvester and it achieved 18.0 μW power generation with the area of 400 mm² under the force equivalent to occlusal force.