Design and implementation of a robust and real-time ultrasonic motion-capture system

Tomohiko Sato, Shigeki Nakamura, Kotaro Terabayashi, Masanori Sugimoto, Hiromichi Hashizume
2011 2011 International Conference on Indoor Positioning and Indoor Navigation  
In this paper, we propose an innovative motioncapture system using ultrasonic communications. Compared with existing commercial motion-capture systems that use optical or magnetic sensing, the proposed system can provide a costeffective solution for industrial and entertainment applications. To design and implement the system, a distance-estimation method called the Extended Phase Accordance Method (EPAM), which can measure the distance to a moving object with a standard deviation of less than
more » ... mm, was devised. To improve the capture rate of the proposed system, the EPAM algorithm was implemented in a field-programmable gate array (FPGA). The current version of the system conducts motion capture using five markers attached to a user. It can work at 10 frames per second (fps), with an error of less than 54 mm and a standard deviation of 42 mm. This demonstrates a moderate level of accuracy, which will be useful for several applications. keywords-Ultrasonic motion-capture system, Extended phase accordance method
doi:10.1109/ipin.2011.6071907 dblp:conf/ipin/SatoNTSH11 fatcat:juufgqbpg5bnlgdbcod5wm3xby