Determination of rotational kinematics of the lower leg during sprint running using accelerometers

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Title Determination of rotational kinematics of the lower leg during sprint running using accelerometers
Author Channells, Justin Peter; Purcell, Brendan; Barrett, Rod; James, Daniel Arthur
Publication Title Proceedings of SPIE on CD-ROM: Microelectronics, MEMS, and Nanotechnology
Editor Alex J. Hariz
Year Published 2006
Place of publication USA
Publisher International Society for Optical Engineering (SPIE)
Abstract Motion analysis systems measure and calculate the position of markers fixed to the body but generally restrict measurement to the laboratory environment. In contrast, inertial measurement devices are small, lightweight and selfcontained and data collection is not restricted to a laboratory. Most research using inertial measurement in human locomotion studies has focused on walking. This paper describes a wireless accelerometer-based method for measuringshank angular velocity during sprint running. The system consists of body-mounted electronics with a wireless connection to a PC programmed with the necessary equations to interpret the acceleration data. The hardware incorporates two sets of accelerometers measuring acceleration in each of the three axes. The two 3D accelerometers are fixed to a frame so that their axes are aligned and they are separated by a prescribed distance. By calculating the difference in acceleration between the two 3D sensors, the gravitational component and linear acceleration components are cancelled leaving the rotational acceleration components. An onboard microcontroller digitises the accelerometer signals and the data is transmitted wirelessly to a PC to calculate the angular velocity with minimal latency. Tests were conducted on several subjects running at a constant velocity for several different speeds. The angular rate output from the accelerometer-based system was compared to data obtained from an optical motion analysis system. Validation test results indicate an accurate result was obtained. The design's suitability for acquiring data during elite athlete sprint training is examined and other applications considered. Error reduction strategies will also be discussed.
Peer Reviewed Yes
Published Yes
Conference name SPIE Symposium on Microelectronics, MEMS, and Nanotechnology
Location Brisbane, Australia
Date From 2005-12-12
Date To 2005-12-14
URI http://hdl.handle.net/10072/13410
Date Accessioned 2007-03-15
Date Available 2007-08-07T02:15:34Z
Language en_AU
Research Centre Centre for Wireless Monitoring and Applications; Centre for Musculoskeletal Research; Griffith Health Institute
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Biomedical Engineering
Publication Type Conference Publications (Full Written Paper - Refereed)
Publication Type Code e1

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