Wearable low-cost inertial sensor-based electrogoniometer for measuring joint range of motion

• Published in: Dyna (Medellín, Colombia) Vol. 84; no. 201; pp. 180 - 185
• Main Authors: Lara Herrera, Claudia N, Ruiz Olaya, Andrés Felipe, Callejas Cuervo, Mauro
• Format: Journal Article
• Language: English
• Published: Bogota Universidad Nacional de Colombia 2017
• Subjects: Correlation coefficient; Correlation coefficients; Elbow; Elbow (anatomy); Electrogoniometer; Electrogoniometers; Electrogoniómetro; ENGINEERING, MULTIDISCIPLINARY; Human motion; Human performance; Inertial sensing devices; inertial sensors; joint range of motion; Medicine; Microcontrollers; Motion capture; motion capture system; Motor task performance; Performance assessment; rango articular de movimiento; Rehabilitation; sensores inerciales; sistema de captura de movimiento; Sports medicine; motion capture system; rango articular de movimiento; joint range of motion; Electrogoniometer; inertial sensors; Electrogoniómetro; sensores inerciales; sistema de captura de movimiento
• ISSN: 0012-7353; 2346-2183
• DOI: 10.15446/dyna.v84n201.59054

Human movement analysis have become fundamental for a wide range of applications, such as physical therapies, neuro-rehabilitation, sports medicine, human motor system performance assessment and occupational medicine. This paper focuses on the design, implementation and validation of an inertial sensor-based portable electrogoniometer aimed at measuring joint range of motion. The system is composed of two inertial measurement units and a microcontroller that permits real-time human motion capture. The electrogoniometer was tested both in static and dynamic conditions in comparison to a standard commercial electrogoniometer during elbow movements. For static validation, the concordance correlation coefficient (ρC) obtained was 0.9605. The ρC found for slow-speed cyclical movements was 0.9830 and the ρC found for moderate-speed cyclical movements was 0.9619.