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Open AccessArticle

Systematic Experimental Assessment of a 2D-Motion Sensor to Detect Relative Movement between Residual Limb and Prosthetic Socket

Institute for Mechatronic Systems in Mechanical Engineering, Technische Universität Darmstadt, Otto-Berndt-Str. 2, 64287 Darmstadt, Germany
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Sensors 2018, 18(7), 2170; https://doi.org/10.3390/s18072170
Received: 8 June 2018 / Revised: 2 July 2018 / Accepted: 3 July 2018 / Published: 6 July 2018
(This article belongs to the Section Physical Sensors)
A sensor system for measuring the relative movement between prosthetic socket and residual limb based on a 2D-motion sensor is introduced and thoroughly tested experimentally. The quantitative analysis of test rig evaluation is used to identify advantageous sensor settings and liner configurations. Considering these favorable settings, sensor functionality is quantified to errrel=0.52±1.78%. Advancing to convex measurement surfaces, the sensor shows absolute errors of errabs1 mm in an observable measurement scenario. The feasibility of measuring gait-induced relative movement with the proposed 2D-motion sensor is shown via a biomechanical plausibility study. Overall, the findings suggest that the proposed sensor system is suitable for investigating the relative movement between residual limb and prosthetic socket in dynamic gait situations. View Full-Text
Keywords: relative movement; lower limb prosthetics; biomechanical measurement tasks; quantifying socket fit; gait analysis relative movement; lower limb prosthetics; biomechanical measurement tasks; quantifying socket fit; gait analysis
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Noll, V.; Rinderknecht, S.; Beckerle, P. Systematic Experimental Assessment of a 2D-Motion Sensor to Detect Relative Movement between Residual Limb and Prosthetic Socket. Sensors 2018, 18, 2170.

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