Motion capture systems play an important role in health-care and sport-training systems. In particular, there exists a great demand on a mobile motion capture system that enables people to monitor their health condition and to practice sport postures anywhere at any time. The motion capture systems with infrared or vision cameras, however, require a special setting, which hinders their application to a mobile system. In this paper, a mobile three-dimensional motion capture system is developed based on inertial sensors and smart shoes. Sensor signals are measured and processed by a mobile computer; thus, the proposed system enables the analysis and diagnosis of postures during outdoor sports, as well as indoor activities. The measured signals are transformed into quaternion to avoid the Gimbal lock effect. In order to improve the precision of the proposed motion capture system in an open and outdoor space, a frequency-adaptive sensor fusion method and a kinematic model are utilized to construct the whole body motion in real-time. The reference point is continuously updated by smart shoes that measure the ground reaction forces.
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Mobile Handset R&D Center,
LG Electronics,
e-mail: [email protected]
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January 2014
Research-Article
A Mobile Motion Capture System Based on Inertial Sensors and Smart Shoes Available to Purchase
Pyeong-Gook Jung,
Sehoon Oh,
Sehoon Oh
Research Professor
e-mail: [email protected]
Sogang University,
e-mail: [email protected]
Department of Mechanical Engineering
,Sogang University,
Seoul 121-742
, Korea
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Gukchan Lim,
Mobile Handset R&D Center,
LG Electronics,
e-mail: [email protected]
Gukchan Lim
Chief Research Engineer
Mobile Handset R&D Center,
LG Electronics,
Seoul 153-801
, Korea
e-mail: [email protected]
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Kyoungchul Kong
Kyoungchul Kong
1
Assistant Professor
Sogang University,
e-mail: [email protected]
Department of Mechanical Engineering
,Sogang University,
Seoul 121-742
, Korea
e-mail: [email protected]
1Corresponding author.
Search for other works by this author on:
Pyeong-Gook Jung
e-mail: [email protected]
Sehoon Oh
Research Professor
e-mail: [email protected]
Sogang University,
e-mail: [email protected]
Department of Mechanical Engineering
,Sogang University,
Seoul 121-742
, Korea
Gukchan Lim
Chief Research Engineer
Mobile Handset R&D Center,
LG Electronics,
Seoul 153-801
, Korea
e-mail: [email protected]
Kyoungchul Kong
Assistant Professor
Sogang University,
e-mail: [email protected]
Department of Mechanical Engineering
,Sogang University,
Seoul 121-742
, Korea
e-mail: [email protected]
1Corresponding author.
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received November 23, 2012; final manuscript received August 1, 2013; published online August 30, 2013. Assoc. Editor: Sergey Nersesov.
J. Dyn. Sys., Meas., Control. Jan 2014, 136(1): 011002 (9 pages)
Published Online: August 30, 2013
Article history
Received:
November 23, 2012
Revision Received:
August 1, 2013
Citation
Jung, P., Oh, S., Lim, G., and Kong, K. (August 30, 2013). "A Mobile Motion Capture System Based on Inertial Sensors and Smart Shoes." ASME. J. Dyn. Sys., Meas., Control. January 2014; 136(1): 011002. https://doi.org/10.1115/1.4025207
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