Hollow fiber based pressure – strain multiple signals sensor

Abstract

For the recent year, mobile smart devices is generalized in everyday life and application area related with smart device is spreads widely. Therefore, the importance of sensor technology is getting bigger for close monitoring of human and environment. For these reasons, the wearable electronic system with physical sensor is became spotlighted, especially the textile-based electronics which can direct integrated into the clothes for everyday life. However, the presented wearable physical sensor generated signal from one mechanism under the multiple stimulus, and it is hard to classify the each physical stimuli when multiple stimulus is applied. In this paper, I introduce PDMS hollow fiber based pressure – strain multiple signals sensor with capacitive and resistive mechnism. The characteristics of Stratchable Silver Paste is investigated with various thermal treatment condition and composition for finding condition of reliable piezoresistivity and conductivity, and the condition for low resistivity and high gauge factor is secured. With this piezoresistive material and PDMS dielectric matreial, multi-layer fiber sensor with cylindrical capacitor like structure is fabricated on hyperelastic hollow fiber using dip coating method. It was confirmed that the sensor generate the capacitive signal and resistive signal simultaneously, and the changing ratio is different with each stimuli