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

doi:10.1016/j.heliyon.2024.e26307

Noninvasive wearable sensor for the continuous monitoring of human sound and movement signals in real-time

Heliyon. 2024 Feb 10;10(5):e26307. doi: 10.1016/j.heliyon.2024.e26307. eCollection 2024 Mar 15.

Authors

Eun Ae Choi^{1

2}, Jeong Chan Lee³, Mi Yu⁴, Hyo Sung Kwak^{5

6}, Bishnu Kumar Shrestha⁷, Chan Hee Park^{1

7

3

8}, Cheol Sang Kim^{7

3

8}

Affiliations

¹ Innovative Mechanobio Active Materials Based Medical Device Demonstration Center, Jeonbuk National University, Jeonju, Republic of Korea.
² Interventional Mechano-Biotechnology Convergence Research Center, Jeonbuk National University, Jeonju, Republic of Korea.
³ Department of Bionanotechnology and Bioconvergence Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea.
⁴ Division of Biomedical Engineering, College of Engineering, Jeonbuk National University Republic of Korea.
⁵ Research Institute of Clinical Medicine of Jeonbuk National University Biomedical Research Institute of Jeonbuk National University Hospital Republic of Korea.
⁶ Department of Radiology and Research Institute of Clinical Medicine of Jeonbuk National University Biomedical Research Institute of Jeonbuk National University Hospital Republic of Korea.
⁷ Department of Bionanosystem Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea.
⁸ Department of Mechanical Design Engineering, Graduate School, Jeonbuk National University, Jeonju, Republic of Korea.

Abstract

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.

Keywords: Bio-sensor; Electrospinning; Peizo-electric; Polyaniline.