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RISS 인기검색어
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- 저자 : 문동준(D. J. Moon) (검색결과 6 건)
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주파수 영역에서의 근전도 분석을 통한 보행패턴에 관한 연구
문동준(D. J. Moon),김주영(J. Y. Kim),정현두(H. D. Jeong),이응혁(E. H. Lee),최흥호(H. H. Choi) 한국재활복지공학회 2013 한국재활복지공학회 학술대회논문집 Vol.2013 No.10
In this study, as a basic research for the patients with amputation rehabilitation, time-frequency was confirmed through the STFT EMG during level ground walking and stair walking. The results of STFT were represented by spectrum and Mesh grid, according to the frequency of the gait cycle and features of the patterns are analyzed. Spectrum from all walk between 5-50 Hz with amplitudes was stronger , than based Giga swing with a wider frequency band was confirmed .The swing has bandwidth at based 5 Hz until 250 Hz to 300 Hz. And the stance has bandwidth, until 300 Hz to 450 Hz. Future research, STFT technique is thought to be more extensive analysis by a study on threshold setting of frequency. The results of this study is could contribute to effective rehabilitation methods at amputation patients is considered.
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근전도 신호의 고차함수분석법을 이용한 정량적 재활정도 평가에 관한 연구
문동준(D. J. Moon),김주영(J. Y. Kim),노시철(S. C. Noh),최홍호(H. H. Choi) 한국재활복지공학회 2014 재활복지공학회논문지 Vol.8 No.4
본 연구에서는 재활정도를 정량적으로 표현하기 위하여 정상 보행과 모의 비정상 보행 시 보행주기에 따른 근전도 패턴에 고차 곡선 맞춤을 적용하여 분석하였다. 보행 근전도 패턴에 적합한 다항식을 생성하였으며, 그 변수를 군집분석 하여 5개의 그룹으로 분류하였다. 정상패턴을 포함한 그룹을 기준으로 거리가 가까운 그룹을 나열하여 각 변수의 분포를 확인하였다. 진폭감소 패턴, 불규칙 패턴, 역상 패턴 순으로 정상 패턴에 유사하였으며, 분류된 그룹의 분포는 중첩되는 범위가 작아 변수 값을 이용한 그룹 분류가 가능하였다. 분류된 재활정도를 정량적으로 나타내기 위하여 각 계수항의 표준편차를 패턴별로 비교하였고, 정상에 가까울수록 큰 값을 가지는 것을 확인하였다. 역상 패턴의 경우는 편차 값은 크지만 부호가 음의 값을 가지므로 가장 작았다. 본 연구의 결과인 정량적인 재활정도의 표현은 보다 효율적인 재활방법 연구에 기여할 것으로 예상된다. In this study, in order to quantitatively confirm walking rehabilitation degree, we analyzed EMG pattern simulated abnormal gait and normal gait by applying a curve fitting. We calculated the suitable high-order function for EMG signal, and classified them into 5 groups by using cluster analysis. Depending on the distance from normal pattern group, we listed the pattern group and then the distribution of each variables were confirmed. The amplitude-decreased pattern was the most similar to the normal pattern, but the reversed pattern showed the lowest similarity. Due to the smaller overlapping range, the distribution of the groups were possible to classify using the value of variable. The standard deviation of each term coefficient was compared to indicate the quantitative rehabilitation extent, and the higher value was confirmed as the pattern is close to the normal pattern. Consequently, the representation of quantitative rehabilitation extent is expected to contribute to the more effective rehabilitation method study.
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하퇴 절단 환자 재활 컨텐츠 개발을 위한 보행 및 계단오르내리기에 관한 근활성도 분석
문동준(D. J. Moon),김주영(J. Y. Kim),정현두(H. D. Jeong),이응혁(E. H. Lee),최홍호(H. H. Choi) 한국재활복지공학회 2013 한국재활복지공학회 학술대회논문집 Vol.2013 No.4
In this study, changes of muscle activity that occurs when subjects walk or go up and down the stairs were analyzed by using EMG signal. The muscle activity of swing phase and stance phase was evaluated for each walking. Five healthy male capable of normal gait and stair climbing were selected as subjects. EMG signal from quadriceps and biceps femoris was measured. The stance phase was high during walking and the swing phase was high when subject go up the stairs, when subject go down the stairs, the stanse phase was high. Observations of muscle activity, stanse and swing phases were separated easily but kinds of gait were not separated. Through this study, appropriate EMG measurement part can be selected and recognition of stance and swing phased is possible using muscle activity when developing rehabilitation content for patients with transtibial amputation.
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기울기 센서와 근전도를 이용한 보행패턴 특징 추출에 관한 연구
문동준(D. J. Moon),김주영(J. Y. Kim),정현두(H. D. Jung),노시철(S. C. Noh),최흥호(H. H. Choi) 한국재활복지공학회 2013 재활복지공학회논문지 Vol.7 No.2
본 연구에서는 근전도 신호를 이용하여 보행주기에 따른 패턴 및 특징을 시간영역과 주파수영역으로 나누어 분석하였다. 보행주기를 입각기와 유각기로 나누어 평지보행과 계단보행 실험을 실시하여 그 결과를 분석하였으며, 이때 시상면에서의 하퇴부 각도와 대퇴사두근과 대퇴이두근의 근전도 신호를 대상으로 하였다. 하퇴부의 기울기는 모든 보행에서 HS일 때 가장 큰 기울기 값을 나타내었으며, TO일 때 가장 낮은 값을 나타내었다. 시간영역에서의 근전도 분석은 모든 보행에서 보행주기에 따라 IEMG가 일정한 패턴을 보였으며, 보행 종류 및 주기 판단에 가장 용이할 것으로 판단된다. 주파수영역에서의 분석은 시간에 따른 주파수 분석이 가능한 STFT법을 사용하였으며, 기울기센서를 이용하여 보행주기를 구분하고자 하였다. 또한 STFT한 결과를 스펙트럼으로 나타내어 분석하였으며, 모든 보행에서 입각기가 유각기보다 더 높은 주파수를 가지는 것을 확인하였다. 본 연구를 통하여 근전도와 시상면에서의 하퇴부 기울기를 이용하여 보행주기 판단 및 분석의 가능성을 확인하였으며, 이를 활용하면 하지 절단환자의 보행의지를 판단하여 의족제어 및 효율적 재활에 기여할 수 있을 것으로 판단된다. In this study, the patterns and characteristics according to gait cycle were analyzed using to EMG signals during walking, and analyzed in the time domain and frequency domain. The experiments was performed divide to level-ground walking and stair walking, and gait cycle was analysis by stance and swing. In the sagittal plane by using the tilt sensor measures the angle of the lower leg, and EMG was measured from the quadriceps and biceps femoris. The tilt of the lower leg was showed the biggest tilt at HS, and showed lowest value at TO. All in walking according to the gait cycle IEMG showed a specific pattern, and is expected useful to determine the gait cycle and kind. In the frequency domain analysis was using STFT on able to frequency analysis according to time, and using the tilt sensor was identify gait cycle. We analyzed also spectrum of the results of the STFT in all gait types, and recognized that stance had broad bandwidth than that of swing. Through this study, it was confirmed the possibility of judgment and analysis of the gait cycle using EMG and the tilt in the sagittal plane of the lower leg. When used it, can improve the quality of life of amputation patients.
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근전도 기반 능동형 부하 제어방식의 상지 재활운동 시스템 개발
정현두(H. D. Jung),김주영(J. Y. Kim),민정화(J. H. Min),문동준(D. J. Moon),문치웅(C. W. Mun),최흥호(H. H. Choi) 한국재활복지공학회 2012 한국재활복지공학회 학술대회논문집 Vol.2012 No.4
In this study, the upper limbs rehabilitation with active excise load control system based on EMG was developed. In order to evaluate the usefulness of the developed the upper limbs rehabilitation with active excise load control system, the exercise test was conducted to 6 healthy men without musculoskeletal system disorder. With these test the responsibility of exercise load to the changing of IEMG, and the changing of rating of perceived exertion with the exercise load were discussed. As a result, we confirmed the usefulness with reliability of the developed system and the relations between the rating of perceived exertion of subjects and each parameter. The results of this study could be useful to the individual treatment planning include the initial load-balancing and the amount of exercise.
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전신마비 및 중증 재활환자들을 위한 안구인식 마우스의 안구추적 알고리즘
서민교(M. G. Seo),정현두(H. D. Jeong),민정화(J. H. Min),문동준(D. J. Moon),김미선(M. S. Kim),최흥호(H. H. Choi) 한국재활복지공학회 2011 한국재활복지공학회 학술대회논문집 Vol.2011 No.11
In this study, and severely paralyzed patients with limited mobility rehabilitation for patients with eye tracking algorithm to recognize the mouse"s eye is proposed. OpenCV (Open Source Computer Vision - Inter created in the Image Processing Library) and the Starburst Algorithm used to track the movement of the pupil is proposed. After extracting the eye area to area, using the Starburst algorithm to obtain the position of the pupil to control the mouse in the eye of the conventional ocular image matching and face recognition method and characterized by a pattern of how to detect than the S / W It is easy to develop.
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