2024-03-29T15:54:59Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1421412021-12-27T15:49:15Zcom_10261_31565com_10261_4col_10261_31566
DIGITAL.CSIC
author
Vargas-Valencia, Laura Susana
author
Elías, Arlindo
author
Rocón, Eduardo
author
Bastos-Filho, Teodiano
author
Frizera Neto, Anselmo
funder
Consejo Superior de Investigaciones Científicas (España)
funder
European Commission
2017-01-04T08:53:53Z
2017-01-04T08:53:53Z
2016-12-10
Sensors 16(12): 2090 (2016)
http://hdl.handle.net/10261/142141
10.3390/s16122090
http://dx.doi.org/10.13039/501100003339http://dx.doi.org/10.13039/501100000780
27973406
This paper presents a novel calibration procedure as a simple, yet powerful, method to place and align inertial sensors with body segments. The calibration can be easily replicated without the need of any additional tools. The proposed method is validated in three different applications: a computer mathematical simulation; a simplified joint composed of two semi-spheres interconnected by a universal goniometer; and a real gait test with five able-bodied subjects. Simulation results demonstrate that, after the calibration method is applied, the joint angles are correctly measured independently of previous sensor placement on the joint, thus validating the proposed procedure. In the cases of a simplified joint and a real gait test with human volunteers, the method also performs correctly, although secondary plane errors appear when compared with the simulation results. We believe that such errors are caused by limitations of the current inertial measurement unit (IMU) technology and fusion algorithms. In conclusion, the presented calibration procedure is an interesting option to solve the alignment problem when using IMUs for gait analysis.
openAccess
An IMU-to-Body Alignment Method Applied to Human Gait Analysis
artículo
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URL
https://digital.csic.es/bitstream/10261/142141/1/sensors-16-02090.pdf
File
MD5
7f4eda989dab44b19914ab3278ed6332
2501018
application/pdf
sensors-16-02090.pdf