초록 ▼

□ 과제명 : 인간공학적 안전 농작업을 위한 온실에서의 작업부하와 스트레스 분석 및 모델 개발
▶ 연구목적 :
○ 생체정보와 작업하중을 정량적으로 측정할 수 있는 생체정보 계측시스템을 구성
○ 농작업에 있어 가장 빈번하게 일어나는 자세인 들어올리기 동작에서 그리고 실제 온실에서 이루어지고 있는 방울토마토수확, 상치수확, 김매기 작업 등에 대해서 생리학적 신호, 인체활동량 그리고 허리의 동적 및 정적 부하를 분석
▶ 주요연구내용 :
○ 1세부과제명 : 온실에서의 농작업자 스트레스 분석 및 모델 개발
-

□ 과제명 : 인간공학적 안전 농작업을 위한 온실에서의 작업부하와 스트레스 분석 및 모델 개발
▶ 연구목적 :
○ 생체정보와 작업하중을 정량적으로 측정할 수 있는 생체정보 계측시스템을 구성
○ 농작업에 있어 가장 빈번하게 일어나는 자세인 들어올리기 동작에서 그리고 실제 온실에서 이루어지고 있는 방울토마토수확, 상치수확, 김매기 작업 등에 대해서 생리학적 신호, 인체활동량 그리고 허리의 동적 및 정적 부하를 분석
▶ 주요연구내용 :
○ 1세부과제명 : 온실에서의 농작업자 스트레스 분석 및 모델 개발
- (주요연구내용)
○ 2세부과제명 : 온실에서의 생체역학적 작업부하 분석 및 모델 개발
- (주요연구내용)

Abstract ▼

Workers in agriculture industry have exposed to a lot of recognized risk factors for the work-related musculoskeletal disorders. The objective of this study were to develop a system to measure workers’ physiological and biomechanical signals in the greenhouse works and to analyze them. We investigat

Workers in agriculture industry have exposed to a lot of recognized risk factors for the work-related musculoskeletal disorders. The objective of this study were to develop a system to measure workers’ physiological and biomechanical signals in the greenhouse works and to analyze them. We investigated the changes of physiological (body temperature, heart rate, blood pressure and heart rate variability (HRV)) and biomechanical factors (physical activity and kinetic analysis) for workers' workload and stress analysis in greenhouse works. (1) Inner ear temperature was more significant and accurate than skin temperature during the work. (2) Heart rate change between before and after the work was significant. (3) During asymmetric lifting work, the work loading 2 kg load was a light intensity work. On the contrary, 12 kg and 22 kg loading works were a moderately hard intensity work. (4) In almost works, mean expenditure quantities of waist were higher than those of wrist, execept the 2 kg loading work. (5) Using a 3-axis angular accelerate sensor, maximum angular moment on the waist was calculated in all the experiments. As a consequence, maximum shear forces of the back disk could be calculated from angular moments of the trunk. (6) Acute stress-index increased highly when workers' conditions were changed. In this research, a system and a model which can measure and predict all kinds of physiological and biomechanical signals from farm works were developed.
Mainl parameters of workers' workload and stress were determined by classification of general tasks such as manual materials handling, asymmetric lifting and specific agricultural works like cherry tomato harvesting work, lettuce harvesting work, weed controlling work, soil screening work, flowerpot transporting work to prevent work related risks from agricultural works. Joint angles and joint moments as mechanical works were assumed as rigid-body dynamics in sagittal plane. The spine loading analysis method was verified by comparing the results of video-based motion capture system. Workers' body temperature, breath rate, heart rate, physical activity, mechanical load and acute stress index were measured or recorded while workers were lifting loads and doing the greenhouse works. The workloads were analyzed according to type of works. The results were followings: (1) The body temperatures were continuously increased during the task time and significantly higher increase rate in the squat postures, where it was known as a high intensity work.; (2) The breath rate was measured by the temperature change in the nose and significantly increased in the squat postures, where it was known as a high intensity work.; (3) The average heart rate was low during the most greenhouse tasks and significantly increased in the squat postures, where it was known as a high intensity work; (4) The physical activity for energy expenditure was the highest on the wrist and different regarding to the type of agricultural works.; (5) The biomechanical loads on the L5/ S1 disk were lower than the load limits in manual lifting in the most greenhouse works. The joint reaction force on the L5/S1 disk in the squat posture was significantly lower than the stand and stoop postures. (6) The acute stress index was measured by the heart rate variability, and it increased due to parasympathetic activation more than 70 while workers' conditions were changed suddenly in hard agricultural works. (7) Mean heart rate during soil screening work was 95.4±5.0l bpm, which indicated the soil screening work is a light intensity work, and maximum muscle contraction force, compressive force, and shear force on L5/S1 spine were about 1,800N, 2,000N, and 350N, respectively. (8) In flowerpot transporting work, mean heart rate was 109.2±9.5 bpm, which meant a light intensity work. Maximum muscle contraction force, compressive force and shear force during the work were 2,600N, 2,800N and 500N, respectively. It concluded that the flowerpot transporting work was harder than soil screening work, although both works were light intensity works. This study would be a great help in measuring quantitatively workers' physiological change, kinematics and kinetic factors without any restriction of space.

목차 Contents

• 제출문 ... 1
• 요약문 ... 2
• SUMMARY ... 7
• 제 1 장 서 론 ... 9
• 1 절 연구의 배경 및 필요성 ... 9
• 2 절 연구의 목적 ... 11
• 제 2 장 국내외 기술개발 현황 ... 12
• 1 절 작업자의 생체정보 측정 ... 12
• 2 절 작업자의 작업부하 측정 ... 13
• 제 3 장 연구개발수행 내용 및 결과 ... 14
• 1 절 들어올리기 작업에서의 생리학적 및 생체역학적 생체정보측정 및 분석 ... 14
• 2 절 온실 농작업에서의 생리학적 및 생체역학적 생체정보측정 및 분석 ... 53
• 3 절 종합 요약 및 결론 ... 84
• 제 4 장 연구개발목표 달성도 및 대외기여도 ... 86
• 1절 : 목표대비 대외달성도 ... 86
• 2절 : 정량적 성과(논문게재, 특허출원, 기타)를 기술 ... 86
• 제 5 장 연구개발결과의 활용계획 ... 90
• 제 6 장 연구개발과정에서 수집한 해외과학기술정보 ... 90
• 제 7 장 기타 중요 변동사항: 해당 없음 ... 91
• 제 8 장 국가과학기술종합정보시스템에 등록한 연구장비 현황: 해당 없음 ... 91
• 제 9 장 참고문헌 ... 91
• 1 절 1장의 참고문헌 ... 91
• 2 절 2장의 참고문헌 ... 92
• 3 절 3장 1절의 참고문헌 ... 94
• 4 절 3장 2절의 참고문헌 ... 95
• 주요 결과 요약서 ... 96