Development of a System Observing Workers Physiological Responses and 3-Dimensional Biomechanical Loads in the Task of Twisting While Lifting
2013
Son, H.M., Korea Institute of Technology, Ansan, Republic of Korea | Seonwoo, H., Seoul National University, Seoul, Republic of Korea | Kim, J.H., Seoul National University, Seoul, Republic of Korea | Lim, K.T., Seoul National University, Seoul, Republic of Korea | Chung, J.H., Seoul National University, Seoul, Republic of Korea
Purpose: The purpose of this study is to provide analysis of physiological, biomechanical responses occurring from the operation to lifting or twist lifting task appears frequently in agricultural work. Methods: This study investigated the changes of physiological factors such as heart rate, heart rate variability (HRV) and biomechanical factors such as physical activity and kinetic analysis in the task of twisting at the waist while lifting. Results: Heart rates changed significantly with the workload. The result indicated that the workload of 2kg was light intensity work, and the workload of 12kg was hard intensity work. Physical activity increased as at the workload increased both on wrist and waist. Besides, stress index of the worker increased with the workload. Dynamic load to herniated discs was analyzed using inertial sensor, and the angular acceleration and torque increased with the workload. The proposed measurement system can measure the recipients physiological and physical signals in real-time and analyzed 3-dimensionally according to the variety of work load. Conclusions: The system we propose will be a new method to measure agricultural workers multi-dimensional signals and analyze various farming tasks.
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