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.
A Mobile Motion Capture System Based on Inertial Sensors and Smart Shoes
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.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
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
Download citation file:
- Ris (Zotero)
- Reference Manager