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고령 농업인을 위한 하지 외골격 설계 요소 정의 및 개발
최경희(Kyeong-Hee Choi),공용구(Yong-Ku Kong),금현지(Hyunji Keum),손승재(Seungjae Son),이도경(Dokyeong Lee),양현석(Hyunseok Yang),김승연(Seoung-Yeon Kim),서민태(Mintae Seo),심현호(Hyun-Ho Shim) 대한인간공학회 2024 大韓人間工學會誌 Vol.43 No.2
Objective: The aim of this study was to define the design factors of a lower-limb wearable exoskeleton that aids in reducing the workloads of elderly farmers. Background: Musculoskeletal disorders related to agricultural work have been raised as a very important problem as the aging population progresses. Especially, the loads of back and lower-limb caused by squatting, and awkward posture like knee or back flexion posture are serious problems because most of the agricultural work consists of atypical work. Therefore, the need to develop a wearable lower-limb assistance device that can reduce the load on the lower extremities caused by agricultural work has recently emerged. Method: In this study, the design of the lower-limb wearable exoskeleton device was classified into three parts: thigh support; calf support; and knee joint connecting thigh and calf supports. First, hip and knee heights, thigh, mid-thigh, and knee circumferences were used to define dimensions for the thigh support. Second, calf height and lower knee, maximum calf, and minimum calf circumferences were used to define dimensions for the calf support. The center height and circumference of each support were set based on these measurements. Finally, in the case of the knee joint, the length between the centers of the thigh and calf support was used. Results: As a result, the specific dimensions were as follows based on the 8th Size Korea. For the thigh support, the center height was 623.7mm; upper, mid, and lower circumferences were 232.1mm (92.3R), 200.8mm (79.9R), and 173.4mm (69.0R), respectively. For the calf support, the center height was 318.6mm; upper, mid, and lower circumferences were 137.7mm (54.8R), 144.9mm (57.6R), and 115.1mm (45.8R), respectively. For the knee joint, the center height was 445.4mm; the length of the knee joint was 305.1mm. Conclusion: In this study, design factors of lower-limb exoskeleton for agricultural work were defined. The lower-limb exoskeleton was classified into three parts: thigh support, calf support, and knee joint. In the case of the support part, center height, and circumference were defined. Then, the length and angle of the knee joint were also defined. Application: It is expected to develop a wearable lower-limb exoskeleton device that can be applied to actual agricultural work in the future through continuous improvement and usability evaluation.