Identification and decomposition of error in 3D motion capture using inertial and magnetic sensors

S. Lambrecht*, I. Jonkers, Jose L Pons

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

In this study the ability of inertial and magnetic sensors (TechMCS, Technaid SL, Madrid, Spain) to accurately track 3D motion is evaluated. An effort is made to decompose the accumulated error present in complex motion capture in order to better understand the strengths, weaknesses and fields of improvement of these sensors. A series of tests were conducted in static, quasi-static and pendulum-dynamic conditions. No significant influence of magnetic field distortion or accelerometer drift was observed. Our data suggests that the drift present after integrating the gyroscope data is a function of motion complexity, with an additional random component. Accurate calibration of gyroscopes and improved drift models are expected to further increase performance of wearable motion capture systems. A maximal discrepancy of almost 4° was observed under ideal testing conditions.

Original languageEnglish (US)
Title of host publicationBiosystems and Biorobotics
PublisherSpringer International Publishing
Pages721-725
Number of pages5
DOIs
StatePublished - Jan 1 2013

Publication series

NameBiosystems and Biorobotics
Volume1
ISSN (Print)2195-3562
ISSN (Electronic)2195-3570

ASJC Scopus subject areas

  • Biomedical Engineering
  • Mechanical Engineering
  • Artificial Intelligence

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