This paper presents detailed design, analysis, prototyping, and testing of a novel force-reflecting hand-controller allowing physicians to control a robotic wrist and perform ultrasound examinations on patients in remote locations. The proposed device is a four degree-of-freedom mechanism with a fixed center-of-motion and uses symmetric parallel mechanisms. All movements of the device are kinematically decoupled, i.e., the hand-controller has independent drive systems for each standard ultrasound motion. A technique has been adapted to statically balance the weight of the device over its entire workspace using a single tension spring. The prototype of the device has been constructed and evaluated for ultrasound imaging of kidney and spleen. Maximum and accuracy of the output force are analytically determined and performance of the device in terms of static balancing, static-friction break-away force, and maximum achievable impedances are experimentally evaluated.
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e-mail: fnajafi@laurentian.ca
e-mail: nariman@cc.umanitoba.ca
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Research Papers
Design and Prototyping of a Force-Reflecting Hand-Controller for Ultrasound Imaging
Farshid Najafi,
Farshid Najafi
Assistant Professor
School of Engineering,
e-mail: fnajafi@laurentian.ca
Laurentian University
, Sudbury, ON, P3E-2C6, Canada
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Nariman Sepehri
Nariman Sepehri
Professor
Department of Mechanical and Manufacturing Engineering,
e-mail: nariman@cc.umanitoba.ca
University of Manitoba
, Winnipeg, MB, R3T-5V6, Canada
Search for other works by this author on:
Farshid Najafi
Assistant Professor
School of Engineering,
Laurentian University
, Sudbury, ON, P3E-2C6, Canadae-mail: fnajafi@laurentian.ca
Nariman Sepehri
Professor
Department of Mechanical and Manufacturing Engineering,
University of Manitoba
, Winnipeg, MB, R3T-5V6, Canadae-mail: nariman@cc.umanitoba.ca
J. Mechanisms Robotics. May 2011, 3(2): 021002 (11 pages)
Published Online: March 10, 2011
Article history
Received:
May 5, 2010
Revised:
January 6, 2011
Online:
March 10, 2011
Published:
March 10, 2011
Citation
Najafi, F., and Sepehri, N. (March 10, 2011). "Design and Prototyping of a Force-Reflecting Hand-Controller for Ultrasound Imaging." ASME. J. Mechanisms Robotics. May 2011; 3(2): 021002. https://doi.org/10.1115/1.4003446
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