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Vol. 115, Issue 4, April 2010, pp. 20-28




Design and Implementation of an Embedded Digital Throwing System Based on MEMS Multiaxial Accelerometer


Zhen GAO and Dan ZHANG

Faculty of Engineering and Applied Science,

University of Ontario Institute of Technology, Oshawa, Ontario, L1H 7K4 Canada

Tel.: 1-905-721-8668 ext. 3504, fax: 1-905-721-3370

E-mail: Zhen.Gao@uoit.ca


Received: 24 March 2010   /Accepted: 20 April 2010   /Published: 27 April 2010

Abstract: This paper presents a novel embedded digital throwing system for synchronously sensing the throwing force of shot-put athletes in real time. The three axes integrated accelerometer, as a crucial device in the force sensing system, can acquire the kinetics data along three orthogonal directions with reasonably high accuracy. The digital shot with almost the same size and weight as the standard shot for open female has been designed, fabricated and implemented. The mechanical structure, signal processing system, and human-machine interface are illuminated in detail. In this manner, the force sensing system serves as a powerful tool for coaches and sports scientists to make scientific researches on professional throwing techniques. It also provides an intuitive and reliable guidance for the throwing athletes to improve their skills.


Keywords: Digital-shot, Shot-put, MEMS accelerometer, Information acquisition, Throwing motion


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