Piezoresistive sensors based on bacterial cellulose/ZnO/PPy composite materials for human signal monitoring and sound detection

Abstract

Wearable piezoresistive sensors based on flexible electronics have gained considerable attention in motion monitoring, human-machine interface, disease diagnosis and health monitoring. Research on flexible wearable sensors can be applied not only to basic sensing and human motion monitoring, but also to sound visualization techniques. In this paper, a piezoresistive sensor was prepared from bacterial cellulose, zinc oxide and polypyrrole and its sensing performance as a sound detector was investigated. The sensor has good sensing performance and can monitor human motion signals. As a sound detector, it can not only recognize different sound signals by monitoring the movement of the laryngeal muscles, but also sense air vibration to detect and recognize various natural sounds. Due to its ability to capture and present sound signals, it is able to build a visual-centred information dissemination system through visualization technology.