Physical risk factors identification based on body sensor network combined to videotaping

Applied Ergonomics
Nicolas VignaisJean-Claude Sagot

Abstract

The aim of this study was to perform an ergonomic analysis of a material handling task by combining a subtask video analysis and a RULA computation, implemented continuously through a motion capture system combining inertial sensors and electrogoniometers. Five workers participated to the experiment. Seven inertial measurement units, placed on the worker's upper body (pelvis, thorax, head, arms, forearms), were implemented through a biomechanical model of the upper body to continuously provide trunk, neck, shoulder and elbow joint angles. Wrist joint angles were derived from electrogoniometers synchronized with the inertial measurement system. Worker's activity was simultaneously recorded using video. During post-processing, joint angles were used as inputs to a computationally implemented ergonomic evaluation based on the RULA method. Consequently a RULA score was calculated at each time step to characterize the risk of exposure of the upper body (right and left sides). Local risk scores were also computed to identify the anatomical origin of the exposure. Moreover, the video-recorded work activity was time-studied in order to classify and quantify all subtasks involved into the task. Results showed that mean RULA scores were ...Continue Reading

Citations

Jun 21, 2020·International Journal of Environmental Research and Public Health·Marta Gómez-GalánJesús-Antonio Carrillo-Castrillo
Dec 1, 2018·Sports Medicine - Open·Corrin P WalmsleyAmity Campbell

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