Wearable wireless inertial measurement for sports applications
Gaffney, Mark; O'Flynn, Brendan; Mathewson, Alan; Buckley, John; Barton, John; Angove, Philip; Včelák, Jan; Ó Conaire, Ciarán; Healy, Graham; Moran, Kieran; O'Connor, Noel E.; Coyle, Shirley; Kelly, Philip; Caulfield, Brian; Conroy, Luke
Date:
2009-09-24
Copyright:
(c) 2009 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Citation:
Gaffney, M. O'Flynn, B. Mathewson, A. Buckley, J. Barton, J. Angove, P. Vcelak. J, Ó Conaire, C. Healy, G. Moran, K. O'Connor, N. E. Coyle, S. Kelly, P. Caulfield, B. Conroy, L. 2009. Wearable wireless inertial measurement for sports applications. Proc. IMAPS-CPMT Poland 2009, Gliwice – Pszczyna, Poland, 22-24 Sept, 2009
Abstract:
A wearable WIMU (Wireless Inertial Measurement Unit) [1] system for sports
applications based on Tyndall's 25mm mote technology [2] has been developed to identify
tennis performance determining factors, giving coaches & players improved feedback [3, 4].
Multiple WIMUs transmit player motion data to a PC/laptop via a receiver unit. Internally the
WIMUs consist of: an IMU layer with MEMS based sensors; a microcontroller/transceiver
layer; and an interconnect layer with supplemental 70g accelerometers and a lithium-ion
battery. Packaging consists of a robust ABS plastic case with internal padding, a power switch,
battery charging port and status LED with Velcro-elastic straps that are used to attach the
device to the player. This offers protection from impact, sweat, and movement of sensors
which could cause degradation in device performance. In addition, an important requirement
for this device is that it needs to be lightweight and comfortable to wear. Calibration ensures
that misalignment of the accelerometer and magnetometer axes are accounted for, allowing
more accurate measurements to be made.
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