This paper describes a novel device to evaluate the mechanical properties of ankle foot orthoses (AFOs). The apparatus permits the application to AFOs of continuous three-dimensional (3D) movements between specified and settable endpoints. Using an robot with a rotary stage and a six-component load cell, characteristic displacement versus reaction force curves can be generated and consequently the ankle moments can be determined as a function of dorsi/plantar flexion, inv/eversion and int/external rotation. Representative curves for two polypropylene lateral leaf AFOs, different in shape but produced for the same leg by a skilled orthotist, are presented to illustrate the capabilities of the novel testing system. The metrological investigation showed that the apparatus creates a highly repeatable data set (uncertainty FSO).
A Continuous Loading Apparatus for Measuring Three-dimensional Stiffness of Ankle-Foot Orthoses
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Cappa, P., Patanè, F., and Di Rosa, G. (July 11, 2005). "A Continuous Loading Apparatus for Measuring Three-dimensional Stiffness of Ankle-Foot Orthoses." ASME. J Biomech Eng. November 2005; 127(6): 1025–1029. https://doi.org/10.1115/1.2049313
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