以肌肉感測貼布監測肌肉動態施力行為與疲勞顫振的實驗驗證與分析方法開發

Abstract

肌肉貼布感測器為一種具高靈敏性、線性度、可撓性、配戴舒適性且具高生物相容性的穿戴式感測器，可黏貼於肌膚表面來監測肌肉施力行為。本研究的目標為以實驗驗證以肌肉貼布感測器量測肌肉不同施力行為之準確性及可靠性。第一個實驗為動態收縮握力實驗，以實驗驗證肌肉貼布感測器能夠量測動態施力強度的變化，驗證肌肉貼布感測器訊號的中位數與平均值會隨著施力大小而有提升，並可分辨慣用手跟非慣用手的差異，且男女慣用手使用EMG驗證的R2值皆在0.91以上。使用負載係數進行相關性分析，男性受試者有較高的相關性結果，判定係數介於0.75~0.83，女性受試者整體的判定係數介於0.54~0.7。第二個實驗是以肌力測試系統測量股內側肌與股外側肌的動態收縮表現，由實驗證明肌肉貼布感測器的訊號強度與施力強度的判定係數於等速運動可達0.89。等速收縮施力區段的時域遲滯曲線分析的判定係數達0.89，而等張運動僅能達0.69。在頻率響應方面，等速運動的主頻率及第二頻率的判定係數分別為1及0.87，而等張運動較低，分別達到0.98及0.63。在靜態收縮的測試中，亦驗證了肌肉貼布感測器於瞬間施力時的監測性能，扭矩數據相比於肌電訊號有較高的相關性表現，判定係數最高可達0.79，且可呈現出肌肉的差異性。最後，在長時間的靜態收縮實驗中驗證了肌肉貼布感測器的震顫表現，肌肉歸類分群後扭矩與肌肉貼布感測器的中頻率相關性可達0.82以上。在肌肉疲勞分析上，研究震顫與疲勞間的趨勢，觀察到肌電訊號與肌肉貼布感測器趨勢吻合最高可達81.25%的吻合率。總結，本研究驗證了肌肉貼布感測器於肌肉收縮的性能表現，驗證了時域的性能與施力值大小具一定程度的線性關係，由震顫與動態收縮主頻率的相關性表現，也能夠看出肌肉貼布感測器的高度頻率靈敏性。

The muscle patch sensor (MPS) is a wearable sensor that possesses high sensitivity, linearity, flexibility, biocompatibility, and comfort. It can adhere to the skin surface of muscles for monitoring muscle contractions. This research aims to experimentally validate the accuracy and reliability of the MPS in measuring various muscle activities. The first experiment studies dynamic gripping strength to validate the MPS' ability to measure dynamic contractions. Results show the median and mean values increase with contraction force, and it can distinguish dominant and non-dominant hands. It is also validated that both genders exhibit a high correlations and are above 0.91 with Electromyographic results (EMG). Correlation analysis of the loading factor indicates stronger results for males (0.75-0.83) than females (0.54-0.7). The second experiment utilizes a dynamometer system to assess the dynamic contractions of the vastus medialis and vastus lateralis. The results demonstrate that the correlations between the signal strength of the MPS and force intensity reaches 0.89 during isokinetic exercise. The hysteresis analysis for isokinetic exercise also yields a correlation of 0.89, whereas isotonic achieves only 0.69. Regarding frequency response, isokinetic exercise exhibit correlations of 1 and 0.87 for the primary and secondary frequency peaks. On the other hand, the isotonic experiment shows a lower correlation of 0.98 and 0.63, respectively. In the static contraction studies, the MPS shows the capability to measure an instantaneous contraction behaviors. The correlation of the MPS to Torque output is higher than compared to EMG results, which can reach 0.82. Lastly, during long-duration isometric experiments, the capability of using the MPS to measure muscle tremor is verified. The correlation between torque and the MPS's median frequency reaches above 0.82. In the analysis of muscle fatigue, the trend between vibration and fatigue is observed. The fatigue trend between EMG and the MPS reaches 81.25%.In conclusion, this study confirms the performance of the MPS in monitoring muscle contractions. The results demonstrate a good agreement of linear relationship between MPS and various muscle activities. The high-frequency sensitivity of the MPS is evident from the correlation between tremor and dynamic contraction in frequency domain.