Noninvasive wearable sensor for the continuous monitoring of human sound and movement signals in real-time
Eun Ae Choi,
Jeong Chan Lee,
Mi Yu,
Hyo Sung Kwak,
Bishnu Kumar Shrestha,
Chan Hee Park,
Cheol Sang Kim
Affiliations
Eun Ae Choi
Innovative Mechanobio Active Materials Based Medical Device Demonstration Center, Jeonbuk National University, Jeonju, Republic of Korea; Interventional Mechano-Biotechnology Convergence Research Center, Jeonbuk National University, Jeonju, Republic of Korea
Jeong Chan Lee
Department of Bionanotechnology and Bioconvergence Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea
Mi Yu
Division of Biomedical Engineering, College of Engineering, Jeonbuk National University Republic of Korea
Hyo Sung Kwak
Research Institute of Clinical Medicine of Jeonbuk National University Biomedical Research Institute of Jeonbuk National University Hospital Republic of Korea; Department of Radiology and Research Institute of Clinical Medicine of Jeonbuk National University Biomedical Research Institute of Jeonbuk National University Hospital Republic of Korea
Bishnu Kumar Shrestha
Department of Bionanosystem Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea; Corresponding author.
Chan Hee Park
Innovative Mechanobio Active Materials Based Medical Device Demonstration Center, Jeonbuk National University, Jeonju, Republic of Korea; Department of Bionanosystem Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea; Department of Bionanotechnology and Bioconvergence Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea; Department of Mechanical Design Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea; Corresponding author. Innovative Mechanobio Active Materials Based Medical Device Demonstration Center, Jeonbuk National University, Jeonju, Republic of Korea.
Cheol Sang Kim
Department of Bionanosystem Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea; Department of Bionanotechnology and Bioconvergence Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea; Department of Mechanical Design Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea; Corresponding author. Department of Bionanosystem Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea.
Recently, with the development of non-invasive human health monitoring technology including wearable devices, a flexible sensor that monitors ‘human sound and movement signals’ such as human voice and muscle movement is attracting attention. In this experiment, electrospun nanofibers were mixed with highly conductive nanoparticles and coated with polyaniline to detect the patient's electrical signals. Due to the high piezoelectric effect, nanofiber-based sensors do not require charging through a separate battery, so they can be used as self-powered devices. In addition, the LCR meter test confirmed that the sensor has a high capacitance due to its high conductivity and high sensitivity to electrical signals. The sensor produced in this study can visually estimate the electrical signal of the actual human body through real-time comparison with electromyography (EMG) measuring equipment, and it was confirmed that the error is small. This sensor is expected to be widely used in the medical field, from simple sound and movement signals to disease monitoring.
