Sensors, Vol. 20, Pages 6452: Efficient Upper Limb Position Estimation Based on Angular Displacement Sensors for Wearable Devices

Sensors, Vol. 20, Pages 6452: Efficient Upper Limb Position Estimation Based on Angular Displacement Sensors for Wearable Devices
Sensors doi: 10.3390/s20226452
Authors:
Aldo-Francisco Contreras-González
Manuel Ferre
Miguel Ángel Sánchez-Urán
Francisco Javier Sáez-Sáez
Fernando Blaya Haro

Motion tracking techniques have been extensively studied in recent years. However, capturing movements of the upper limbs is a challenging task. This document presents the estimation of arm orientation and elbow and wrist position using wearable flexible sensors (WFSs). A study was developed to obtain the highest range of motion (ROM) of the shoulder with as few sensors as possible, and a method for estimating arm length and a calibration procedure was proposed. Performance was verified by comparing measurement of the shoulder joint angles obtained from commercial two-axis soft angular displacement sensors (sADS) from Bend Labs and from the ground truth system (GTS) OptiTrack. The global root-mean-square error (RMSE) for the shoulder angle is 2.93 degrees and 37.5 mm for the position estimation of the wrist in cyclical movements; this measure of RMSE was improved to 13.6 mm by implementing a gesture classifier.

Source: Sensors - November 12, 2020 Category: Biotechnology Authors: Aldo-Francisco Contreras-Gonz ález Manuel Ferre Miguel Ángel Sánchez-Urán Francisco Javier S áez-Sáez Fernando Blaya Haro Tags: Article Source Type: research