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보통형 콤바인 부착용 유채 예취장치 개발 (III) - 유채 기계 수확 손실 절감을 위한 요인 구명 -
이충근,최용,전현종,이승규,문성동,김송수,Lee, C.K.,Choi, Y.,Jun, H.J.,Lee, S.K.,Moon, S.D.,Kim, S.S. 한국농업기계학회 2009 바이오시스템공학 Vol.34 No.2
Field test was conducted to investigate primary factors reducing rapeseed harvesting using a reciprocating cutter-bar of combine. The results showed that the correlation between crop moisture content and yield loss had a U-type, which indicated that the yield reduction increased at too high and too low crop moisture contents. The proper ranges of crop moisture contents were 27${\sim}$35%, 21${\sim}$56%, and 62${\sim}$73% in case of grain, pod and stem, respectively. Crop moisture content was negatively correlated with header loss, but positively correlated with threshing loss. In contrary, stem moisture content showed positive correlations with total loss, threshing loss and separation loss. Working speed was positively correlated with header loss. Total flow rate, pod flow rate and stem flow rate were highly correlated with threshing loss and separation loss. However, grain flow rate did not show any correlation with total loss. According to the principal component analysis, two principal components were derived as components with eigenvalues greater than 1.0. The contribution rates of the first and the second components were 52.7% and 38.9%, which accounted for 91.6% of total variance. As a contributive factor influencing total loss of rapeseed mechanical harvesting, a crop moisture content factor was greater than a crop flow rate factor. The stepwise multiple regression analysis for total loss was conducted using crop moisture content factor, crop flow rate factor and coefficient. However, the model did not show any correlation among independent and dependent factors ($R^2$=0.060).
밸런스 핸들 장치를 이용한 상지 운동 기능의 근전도 신호 분석
이충근(C. K. Lee),송기호(K. H. Song),안재용(J. Y. An),신성욱(S. W. Shin),정성택(S. T. Chung) 한국재활복지공학회 2016 재활복지공학회논문지 Vol.10 No.4
편마비 환자의 상지 운동 기능 재활 치료에 대한 지속적인 관심과 훈련의 정량적인 평가를 위한 다양한 장치가 요구되고 있다. 이러한 문제를 해결하기 위해서 본 논문에서는 거치대와 핸들, 밸런스 볼을 결합한 밸런스 핸들장치를 개발하였다. 피험자 7명을 대상으로, 개발된 상지 훈련 장치를 기울일 때 주요 상지 근육에 대한 근전도신호의 변화를 측정하여 재활 훈련 장치로 사용이 가능한지에 대한 유효성을 검토하였다. 밸런스 핸들 장치를 앞뒤로 기울였을 때의 상지 신전·굴곡 운동 동작과 좌우 기울임을 이용한 상지 운동 동작에서 근 수축과 이완이 기준이 되는 주동근과 길항근에서 근 활성화 신호를 분석하였다. 실험결과, Fugl-Meyer Assessment(FMA)의 신전 · 굴곡 운동 평가 항목에서 편마비 환자의 상지 운동 기능 평가에 이용되는 이두근, 삼두근, 삼각근에서 근 활성화 경향을 보였다. 이러한 결과를 바탕으로 개발된 장치를 활용하여 편마비 환자의 상지 재활 훈련에 도움이 될 수 있다고 볼 수 있다. Rehabilitation of upper limb motor function of hemiplegic patient must maintain interest and demand a device for a quantitative evaluation of rehabilitation training. In this paper, we developed the device that is composed of arm cradle, handle, and balance ball for rehabilitation exercise. We have performed experiment for validity as to whether to use the rehabilitation device when tilting the upper extremity training device developed to measure changes in the EMG signal to the main upper limb muscles for 7 healthy volunteers. We have analyzed muscle activation signals on agonist and antagonist as a reference in the muscle contraction and relaxation in the upper limb extension and flexion when the balance–handle device is tilted to front-rear and left-right. The experimental results showed that a tendency of muscle activation of biceps, triceps, and deltoid used in upper limb motor function of hemiplegic patients from extension and flexion evaluation items of Fugl-Meyer Assessment(FMA). These results may be helpful for rehabilitation training for upper limb motor function of hemiplegic patients by utilizing a developed unit.