In the fields of medical and sports science, it is required to evaluate muscle activity qualitatively and quantitatively. Currently, mechanomyogram (MMG) that can reflect the mechanical activity of muscle fibers is attracting attention. The purpose of this study is to develop a sensor that can measure MMG during exercise. In this study, a small and flexible MMG sensor using P(VDF/TrFE), which is a piezoelectric polymer material, spun into nanofibers by the electrospinning method has been fabricated and evaluated. By the fabricated electrospinning equipment and the obtained fabrication conditions of the nanofibers MMG sensor has been fabricated by using piezoelectric polymer fibers. By using nanofiber nonwoven fabric for the sensor element, the flexible sensor has been realized. In a sound wave reception experiment assuming MMG measurement, the P(VDF/TrFE) nonwoven fabric element showed that the element detected the sound pressure. Additionally, MMG during isometric contraction and pedaling motion has been measured using the fabricated sensor. The results show that the proposed sensor is effective for measuring MMG during exercise.

中文翻译：

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静电纺丝压电聚合物纳米纤维MMG传感器的研究

在医学和运动科学领域，需要定性和定量地评估肌肉活动。目前，能够反映肌纤维机械活动的肌力图（MMG）受到关注。本研究的目的是开发一种可以在运动过程中测量 MMG 的传感器。在这项研究中，使用 P(VDF/TrFE)（一种压电聚合物材料）通过静电纺丝方法纺成纳米纤维，制造并评估了一种小型柔性 MMG 传感器。通过所制造的静电纺丝设备和获得的纳米纤维MMG传感器的制造条件，使用压电聚合物纤维制造了纳米纤维MMG传感器。通过使用纳米纤维无纺布作为传感器元件，实现了柔性传感器。在假定MMG测量的声波接收实验中，P(VDF/TrFE)无纺布元件显示该元件检测到了声压。此外，使用制造的传感器测量了等长收缩和蹬踏运动期间的 MMG。结果表明，所提出的传感器对于测量运动期间的 MMG 是有效的。