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반복적인 들어올리기 작업시 생리학적 신호와 인체활동량 및 허리 부하 분석
손현목(H. M. Son),임기택(K. T. Lim),김장호(J. H. Kim),선우훈(H. Seonwoo),정종훈(J. H. Chung) 대한인간공학회 2009 대한인간공학회 학술대회논문집 Vol.2009 No.5
Workers employed in the agriculture industry have been exposed to many work-related musculoskeletal disorders. Therefore, our purposes in this study were to analysis and evaluate the physiological signal factors to improve musculoskeletal disorders in relation with farm work, especially. We investigated the physiological signal changes in the greenhouse such as body temperature, heart rate, blood pressure, physical activity, and heart rate variability. Moreover, we examined the lumbar spine loads of repeated lifting work related to farm work using the acceleration and angular velocity sensors. The changes of body temperature and heart rate as repeated lifting work during 30 minute were significant (p<0.05), and stress index was more than 80. Also, maximum shear force on the disk (L4/L5) of a lumbar spine in static state was present 500N, and maximum inertia moment was showed 139 N·m in dynamic state.
논문 : 정보처리 및 복합기술 ; 온실에서 방울토마토 수확작업시 작업자의 생리학적 및 생체역학적 반응 측정
선우훈 ( H. Seonwoo ),임기택 ( K. T. Lim ),김장호 ( J. H. Kim ),손현목 ( H. M. Son ),정종훈 ( J. H. Chung ) 한국농업기계학회 2011 바이오시스템공학 Vol.36 No.3
Physiological signals such as body temperature, heart rate, blood pressure and heart rate variability and biomechanical workload for stress analysis were investigated during the cherry tomato harvesting work in a greenhouse. The skin temperatures raised 0.05℃/min, 0.03℃/ min, and 0.08 ℃/min in standing, stooping and squatting postures, respectively. Breath rate significantly increased from 18 to 28 breaths/min during the cherry tomato harvesting work. As the heart rate during the work ranged from about 72 to 110 beats/min (bpm), the cherry tomato harvesting work appeared to be a light intensity task of less than 110 bpm. The worker`s average energy consumption rate in three positions during 43 min working time was 65.74 kcal (91 kcal/h in 70 kg). This was a light intensity of work, compared to 75 kcal/h in 70 kg of basic metabolic energy consumption rate of a worker with 70 kg weight; The maximum shear force on the disk (L5/ S1) due to static workload in the cherry tomato harvesting work was 446 N in the stooping posture, 321 N in the squatting posture and 287 N in the standing posture. Acute stress index expressed with the heart rate variability, increased parasympathetic activation up to about 70 while workers were doing most agricultural work in this study. This study provided a system to measure quantitatively workers` physiological change, kinematics and kinetic factors without any restrictions of space in the greenhouse works.