A new calibration method is proposed for ambulatory systems for low back load exposure estimation based on surface EMG and kinematic data. The method uses an artificial neural network to learn the relation between compressive force in the intervertebral disc at L/sub 4/-L/sub 5/ (C) and smoothed rectified surface EMG signal (SRE) under full dynamic conditions. In vivo tests show that a accurate calibration is possible selecting a training set of 600 samples out of 2 minutes of calibration data. This offers load exposure estimation sensitive to unknown time-varying external loads, compensated for force-length and force-velocity relationships and compensated for inter-individual load handling differences.
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机译:提出了一种基于表面肌电图和运动学数据的用于低背负负荷暴露估计的动态系统的新标定方法。该方法使用人工神经网络来学习L / sub 4 / -L / sub 5 /(C)下椎间盘中的压缩力与全动态条件下的平滑整流表面EMG信号(SRE)之间的关系。体内测试表明,可以从2分钟的校准数据中选择600个样本的训练集进行准确的校准。这提供了对未知时变外部负载敏感的负载暴露估算,补偿了力长和力-速度关系,并补偿了个体间负载处理差异。
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