Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
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Development of a System Observing Worker's Physiological Responses and 3-Dimensional Biomechanical Loads in the Task of Twisting While Lifting

  • Son, Hyun Mok (Field Robot R&D Group, Korea institute of technology) ;
  • Seonwoo, Hoon (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University) ;
  • Kim, Jangho (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University) ;
  • Lim, KiTaek (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University) ;
  • Chung, Jong Hoon (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University)
  • Received : 2013.03.14
  • Accepted : 2013.05.24
  • Published : 2013.06.01
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Abstract

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 2 kg was light intensity work, and the workload of 12 kg was hard intensity work. Physical activity increased as 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 recipient's 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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References

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