A Device for Measuring Relative Angular Displacement

[+] Author and Article Information
R. P. McCabe

Division of Orthopedic Surgery, University of Wisconsin, Madison, WI

S. S. Kohles, S. V. Chelikani, R. Vanderby

Division of Orthopedic Surgery, University of Wisconsin, Madison, WI; Department of Mechanical Engineering, University of Wisconsin, Madison, WI

J Biomech Eng 120(2), 299-302 (Apr 01, 1998) (4 pages) doi:10.1115/1.2798316 History: Received November 06, 1995; Revised July 31, 1997; Online October 30, 2007


A simple, inexpensive, and accurate way to measure relative segmental rotations resulting from torsional loadings locally is described. To measure these rotations, we fabricated a planar spatial linkage (open-loop kinematic chain) requiring only one rotational displacement transducer. This paper describes this device, defines its kinematics, and examines its accuracy.

Copyright © 1998 by The American Society of Mechanical Engineers
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