ERIC Number: EJ961644
Record Type: Journal
Publication Date: 2012
Pages: 13
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-1091-367X
EISSN: N/A
Linear Acceleration Measurement Utilizing Inter-Instrument Synchronization: A Comparison between Accelerometers and Motion-Based Tracking Approaches
Callaway, Andrew J.; Cobb, Jon E.
Measurement in Physical Education and Exercise Science, v16 n2 p151-163 2012
Where as video cameras are a reliable and established technology for the measurement of kinematic parameters, accelerometers are increasingly being employed for this type of measurement due to their ease of use, performance, and comparatively low cost. However, the majority of accelerometer-based studies involve a single channel due to the difficulty associated with synchronizing multiple accelerometer channels. The authors of this article outline a method to synchronize multiple accelerometers using a maxima detection method. Results are presented that demonstrate the effectiveness of the new synchronization method with 52 of 54 recorded data sets showing no time lag error and two tests showing an error of 0.04 sec. Inter-instrument and instrument-video correlations are all greater than r = 0.94 (p less than 0.01), with inter-instrument precision (Root Mean Square Error; RMSE) approximately equal to 0.1ms[superscript -2], demonstrating the efficacy of the technique. In conclusion, the new technique offers a robust solution, giving further support to the movement toward wider adoption of accelerometer-based performance measurement systems in sports science. (Contains 6 tables and 6 figures.)
Descriptors: Measurement Equipment, Motion, Athletics, Equipment Utilization, Measurement Techniques, Video Technology, Comparative Analysis, Validity, Reliability
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A