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RISS 인기검색어
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- 저자 : 박용군(Young-Gyun Piao) (검색결과 3 건)
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가상 자전거 시스템을 이용한 노인의 자세균형 증진에 관한 연구
권대규,윤영일,박용군,김남균,Kwon, Tea-Kyu,Yoon, Young-Il,Piao, Yong-Jun,Kim, Nam-Gyun 대한의용생체공학회 2007 의공학회지 Vol.28 No.5
In this paper, a new rehabilitation training system was developed to improve equilibrium sense of the elderly by combining virtual reality technology with a fixed exercise bicycle. In order to evaluate the effectiveness of the training system, the elderly participated as test subject in the investigation of the influence of different the parameters on postural balance control. We measured three different running modes of virtual bicycle system with two successive sets. The parameters measured were running time, velocity, the weight movement, the degree of the deviation from the road, and the variables about the center of pressure. The repeated training, our results showed that the running capability of the elderly improve compared. In addition, it was found out that the ability of postural control and the equilibrium sense was improved with the presentation of the visual feedback information of the distribution of weight. From the results of this experiment, we showed that our newly developed system might be useful in the diagnosis of equilibrium sense or in the improvement of the sense of sight and, somatic, and vestibular sense of the elderly in the field of rehabilitation training.
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인공근육을 이용한 지능형 족관절 보조기 착용에 따른 족저굴곡 운동 보조 특성
김경(Kyung Kim),강승록(Seung-Rok Kang),박용군(Young-Gyun Piao),권대규(Tae-Kyu Kwon) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
Ankle-foot orthosis with a pneumatic rubber actuator, which is intended for the assistance and the enhancement of ankle muscular activities was developed. In this study, the appropriate amount of power pattern of the device and the effectiveness of the system was investigated. The subjects were instructed to perform gait motion on the treadmill. The subjects were performed the gait motion with and without the ankle-foot orthosis. We made a comparison the muscular activities between with and without the ankle-foot orthosis. For the analysis of muscular activities, Electromyography (EMG) of the subjects was measured during gait motion. A Biodex dynamometer was used to measure the maximal concentric strength of the plantar flexors of with and without the orthosis on right side. The experiment results in gait motion showed that the muscular activities wearing the ankle-foot orthosis were reduced and the peak torque values wearing it were increased. Therefore, we confirmed the effectiveness of the developed ankle-foot orthosis.
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MR 회전 브레이크를 이용한 하지 근력 증진용 헬스 자전거 개발
권대규(Tae-Kyu Kwon),김경(Kyung Kim),박용군(Young-Gyun Piao),허민,강승록(Seung-Rok Kang) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
In this study, a new bicycle ergometer system using the Magneto-Rheological(MR) rotary brake was developed to improve muscular strength for the rehabilitation of hemiplegia patients to reduce uneven pedaling characteristics. The friction load of the MR rotary brake is adjusted according to muscle strength of the subjects. The characteristic of muscular strength was studied with various friction loads of MR rotary brake. The friction load was occurred with the current, applied to the MR rotary brake. Experiments was composed of several cycling trials for various friction loads. In training programs involving muscle improvement, it is necessary to confirm muscle activity and fatigue. To measure the muscle activity and fatigue, EMG signals of rectus femoris (RF), biceps femoris (BF), tensor fasciae latae (TFL), vastus lateralis (VL), vastus medialis (VAS), gastrocnemius (GAS), tibialis anterior (TA) and soleus (SOL) muscles were collected with surface electromyography and analyzed into time and frequency domain. A series of experiments were carried out with and without the engagement of this real-time control mode of MR rotary brake at different pedaling rate to find out the effect of the real-time control mode. The characteristics of the pedaling for these specific conditions were analyzed based on the variations in angular velocities of the pedal unit. The results showed that the variations in the angular velocities were decreased by 42.9% with the control mode. The asymmetry of pedaling between dominant and non-dominant leg was 19.63% in non-control mode and 1.97% in the control mode. The characteristics of electromyography(EMG) in the lower limbs were also measured. The observation showed that Integrated EMG(IEMG) reduced with the control mode. Therefore, the new bicycle system using MR brake with the real time control of mechanical resistance was found to be effective in recovering the normal pedaling pattern by reducing unbalanced pedaling characteristics caused by disparity of muscular strength between affected and unaffected leg.
ScienceON
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