A measurement system for the bicycle crank angle using a wireless motion sensor attached to the crank arm
Journal Title: Journal of Science and Cycling - Year 2013, Vol 2, Issue 2
Abstract
In this study, we propose a system for measuring the rotational angle of a bicycle crank arm. This system consists of a wireless motion sensor with bi-axial acceleration and angular velocity sensors attached to the crank arm. Rotational angles measured by the motion sensor were compared with data from a motion capture system. We found the RMS (root-mean-square) error for the bicycle crank angle was 0.339 ± 0.115 degrees (mean ± SD), and the angular velocity RMS error normalized by the average angular velocity was 0.655 ± 0.217 %. Using the proposed motion sensor system, we were able to measure the rotational angle and angular velocity of the bicycle crank to the same accuracy and high frequency as the motion capture system. Furthermore, we demonstrate it is possible to precisely obtain the rotational crank angle to evaluate fluctuations of crank angular velocity.
Authors and Affiliations
Tomoki Kitawaki*| Okayama University, Graduate School of Health Sciences, Okayama, Okayama, Japan, Hisao Oka| Okayama University, Graduate School of Health Sciences, Okayama, Okayama, Japan
Keywords
Related Articles
- EP ID EP2819
- DOI -
- Views 558
- Downloads 87
Reliability of performance and associated physiological responses during simulated sprint-distance triathlon
Many different methods of simulating triathlon performance in controlled conditions have been developed without establishing the reliability of these assessments. The aim of this study was to determine the reliability of...
Physiological characteristics of elite vs non-elite enduro mountain bike cyclists
Enduro mountain bike racing debuted internationally in 2013 as the Enduro World Series (EWS). Riders compete individually on multiple timed predominantly downhill stages and travel generally uphill between stages eithe...
The effect of deceptive information about receiving cooling on pacing pattern during a 20-km cycling time trial in the heat
Introduction Cooling during exercise in the heat has been shown to be beneficial for performance (Bongers et al. 2014), but it is still unclear to what extent this effect can be contributed to actual physiological or per...
Bicycle Shoe Insoles and Their Effect on Lateral Knee Movement, Leg Muscle Activation Patterns, and Performance in Experienced Cyclists
Introduction: Riders contact their bicycles at three points: hands, hips, and foot-shoe-cleat-pedal (FSCP) interface (Figure 1). Three techniques are used to achieve fit: experienced-based direct observation, technology-...
Physiological characteristics of competitive Brazilian cyclists
The national cycling calendar in Brazil is extensive with numerous regional and state competitions on a weekly basis. Furthermore, several teams now compete in national, continental and international races throughout the...