DataVXAdvanced Functional MaterialsPaper
journal article·2024-07Open access

Self‐Powered Flexible Sensor Array for Dynamic Pressure Monitoring

Li Wu, Jiangtao Xue, Jianping Meng, Bojing Shi, Wei Sun, Engui Wang, Mengji Dong, Xuemei Zheng, Yuxiang Wu, Yusheng Li, Zhou Li

Advanced Functional Materials· Volume 34· Issue 28
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Source abstract

Abstract

Abstract Flexible pressure sensors are valuable in applications such as electronic skin, smart robots, artificial prosthetics, and wearable electronics. In this study, a fully packaged, flexible, self‐powered, long‐term stable sensor array based on piezoelectrets is developed for pressure monitoring. A pressure sensor with a microcavity structure and a thickness of 500 µm achieved an impressive piezoelectric coefficient of 23.8 pC N−1 and a fast response time of 93 ms. The sensor yielded an output voltage of 0.26 V when subjected to a force using 0.3 g soybeans, and it displayed a remarkable linear relationship (R2 = 0.992) between force and electricity with pressure ranging from 1.4 to 13.6 N and a sensitivity of 9 mV N−1. Real‐time monitoring of sound vibration, radial artery pulse, and finger movement is demonstrated along with the successful recording of dynamic pressure changes within the porcine knee joint. It holds potential for fields such as monitoring pressure changes in the movement of human bodies and robotics and can contribute significantly to pressure assessment during total knee replacement.
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Research context

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Innovative Energy Harvesting Technologies · Tactile and Sensory Interactions

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Intelligent Sport and Proactive Health，Department of Health and Physical Education Jianghan University Wuhan 430056 China

Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 101400 China

School of Nanoscience and Engineering University of Chinese Academy of Sciences Beijing 100049 China

School of Medical Technology School of Life Science Beijing Institute of Technology Beijing 100081 China

Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering School of Biological Science and Medical Engineering Beihang University Beijing 100191 China

College of Chemistry and Chemical Engineering Center on Nanoenergy Research Guangxi University Nanning 530004 China

College of Sports Medicine Wuhan Sports University Wuhan 430079 China

Department of Orthopedics, Xiangya Hospital Central South University Changsha 410008 China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Beijing Municipality · Science Fund for Distinguished Young Scholars of Hubei Province · Fundamental Research Funds for the Central Universities

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