근전의수의 제어시스템에 관한 연구

A Study on the Control System of Myoelectric Hand Prosthesis

  • 발행 : 2007.01.01

초록

This paper presents a myoelectric hand prosthesis(MHP) with two degree of freedom(2-DOF), which consists of a mechanical hand, a surface myoelectric sensor(SMES) for measuring myoelectric signal, a control system and a charging battery. The actuation for the 2-DOF hand functions such as grasping and wrist rotation was performed by two DC-motors, and controlled by myoelectric signal measured from the residual forearm muscle. The grip force of the MHP was automatically changed by a mechanical automatic speed reducer mounted on the hand. The skin interface of SMES was composed of the electrodes using the SUS440 metal in order to endure a wet condition due to the sweat. The sensor was embedded with a amplifier and a filter circuit for rejecting the offset voltage caused by power line noises. The control system was composed of the grip force sensor, the slip sensor, and the two controllers. The two controllers were made of a RISC-type microprocessor, and its software was executed on a real-time kernel. The control system used Force Sensing Resistors, FSR, as slip pick-ups at the fingertip of a thumb and the grip force information was obtained from a strain-gauge on the lever of the MHP. The experimental results were showed that the proposed control system is feasible for the MHP.

키워드

참고문헌

  1. 한국보건사회연구원 2000년 전국 장애인 추정치
  2. H. Nicolai, L. Teodorsscu, and L. C. Jain, Intelligent systems and technologies in rehabilitation engineering, CRC press, pp. 243-246. 2001
  3. http://www.ottobock.com
  4. S. Jacobsen, D. Knutti, and R. Johnson, 'Development of the Utah Artificial Arm', IEEE Trans. Biomed. Eng., vol. BME-29, No.4, pp. 249-269, 1982 https://doi.org/10.1109/TBME.1982.325033
  5. C. J Luca, 'Physiology and Mathematics of Myoelectric Signals,' IEEE Trans. Biomed. Eng., vol. 26, No.6, 1979
  6. D. Kumar and A. Me1aku, 'Electrode Distance and magnitude of SEMG,' Proc. of the Second Joint EMBS!BMES Conf., vol. 3, pp. 2477-2480, October 2002
  7. 최기원, 문인혁, 이영준, 추준욱, 성소영, 문무성, '전극의 형상과 간격을 고려한 건식형 표면 근전위 센서 개 발.' 제31회 대한의용생체공학회 추계학술대회, 2004. 11
  8. 이명준, 문인혁, 문무성, '근전도 기반 휴먼 컴퓨터 인 터페이스를 위한 이중 문턱치 수법,' 대한의용생체공 학회 논문지 , vol. 25, No.6, pp. 471-478, 2004
  9. K. D. Englehart and B. Hudgins, 'A robust, real-time control scheme for multifunction myoelectric control,' IEEE Trans. Biomed. Eng., vol. 50, No.7, pp. 848-854, July 2003 https://doi.org/10.1109/TBME.2003.813539
  10. http://www.ottobockus.com/products/uppeclimb_prost hetics/myoelectric_hands_sensorhand.asp