Development of a Vision System for the Measurement of the Pendulum Test

진자검사 계측을 위한 영상 시스템의 개발

  • 김철승 (건국대 의료생명대 의학공학부) ;
  • 문기욱 (건국대 의료생명대 의학공학부) ;
  • 이수영 (건국대학교 충주병원 재활의학과) ;
  • 엄광문 (건국대 의료생명대 의학공학부, 건국대학교 의공학실용기술연구소)
  • Published : 2007.04.01

Abstract

The purpose of this work is to develop a measurement system of the pendulum test with minimal restriction of experimental environment and little influence of noise. In this work, we developed a vision system without any line between markers and a camera. The system performance is little influenced by the experimental environment, if light are sufficient to recognize markers. For the validation of the system, we compared knee joint angle trajectories measured by the developed system and by the magnetic sensor system during the nominal pendulum test and the maximum speed voluntary knee joint rotation. The joint angle trajectories of the developed system during both tests matched well with those of the magnetic system. Therefore, we suggest the vision system as an alternative to the previous systems with limited practicality for the pendulum test.

Keywords

References

  1. 엄광문, 이창한, 김철승, 허지운, '관절계 역학적 특성의 정량화를 위한 비선형 댐퍼모델' 한국정밀공학회, 제22권, 제4호, pp.188-193, 2005
  2. 엄광문, 김석주, 한태륜, '관절계 역학적 특성의 정량적 평가방법' 한국정밀공학회, 제21권, 제11호,pp.209-218, 2004
  3. 김철승, 공세진, 엄광문, 권선덕, 김종문, '다양한 진자운동을 재현가능한 경직의 동적 역치 모델' 한국정밀공학회, 제23권, 제7호, pp.152-158, 2006
  4. Lebiedowska, M. K, Fisk, J.R., 'Passive dynamics of the knee joint in healthy children and children affected by spastic paresis,' Clinical Biomechanics, Vol. 14, pp.653-660, 1999 https://doi.org/10.1016/S0268-0033(99)00021-2
  5. Bajd, T. and Vodovnik, L., 'Pendulum testing of spasticity,' J. Biomedical Eng., VoI.6,PP.9-16, 1984 https://doi.org/10.1016/0141-5425(84)90003-7
  6. 김홍갑, 김형석, '라인 스캔 카메라를 이용한 저가형 시균일 조명장치 구현', 대한전기학회, 제49권, 제5호, 2000
  7. National Instrument Corporation, NI Vision for Labview user manual, National Instrument Corporation, 2005