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A Robotic System for Soft Tissue Characterization
P,Vacalebri,R,Lazzarini,S,Roccella,F,Vecchi,M,C,Carrozza,M,Zecca,P,Dario 한국과학기술원 인간친화 복지 로봇 시스템 연구센터 2003 International Journal of Assistive Robotics and Me Vol.4 No.2
A miniature robotic system has been designed and fabricated to perform in vivo mechanical characterization of soft tissues. The tissue tester employs a stepper motor, which is controlled using micro-stepping techniques to prevent irregular rotation of motor shaft at low speeds. There is also a load cell to measure the reaction force of the tissue under test. At the end of tests session, data could be post elaborated on a PC with special software that reconstructs the force-displacement curves of the tissues being tested. Position and rate feedback are implemented with a digital encoder to minimize errors in motor control during the evaluation of typical viscoelastic phenomena of biological tissues. Calibration tests indicate that the force-displacement curves of the miniature robotic indenter are consistent with that obtained using an ordinary universal testing machine.