Wireless instrumented klapskates for long-track speed skating

Wireless instrumented klapskates for long-track speed skating

van der Kruk, E. (TU Delft Biomechatronics & Human-Machine Control)
Den Braver (student), O. (Student TU Delft)
Schwab, A.L. (TU Delft Biomechatronics & Human-Machine Control)
van der Helm, F.C.T. (TU Delft Biomechatronics & Human-Machine Control)
Veeger, H.E.J. (TU Delft Biomechanical Engineering; TU Delft Biomechatronics & Human-Machine Control)

Biomechanical Engineering

2016

In the current project, we aim to provide speed skaters with real-time feedback on how to improve their skating performance within an individual stroke. The elite skaters and their coaches wish for a system that determines the mechanical power per stroke. The push-off force of the skater is a crucial variable in this power determination. In this study, we present the construction and calibration of a pair of wireless instrumented klapskates that can continuously and synchronously measure this push-off force in both the lateral direction and normal direction of the skate and the centre of pressure of these forces. The skate consists of a newly designed rigid bridge (0.6 kg), embedding two three-dimensional force sensors (Kistler 9602, Kistler Group, Winterthur, Switzerland), which fits between most individual skate shoes and Maple skate blades. The instrumented klapskates were calibrated on a tensile testing machine, where they proved to be unaffected to temperature conditions and accurate up to an RMS of 42 N (SEM = 1 N) in normal and up to an RMS of 27 N (SEM = 1 N) in lateral direction. Furthermore, the centre of pressure of these forces on the blade was determined up to a mean error of 10.1 mm (SD = 6.9 mm). On-ice measurements showed the possibility of recording with both skates simultaneously and synchronously, straights as well as curves. The option to send data wirelessly and real-time to other devices makes it possible to eventually provide skaters and coaches with visual real-time feedback during practice.

Calibration
Force measurements
Instrumentation design
Real-time feedback
Speed skating

http://resolver.tudelft.nl/uuid:d2184a49-5950-4581-b691-7b5ae8c0e8a2

https://doi.org/10.1007/s12283-016-0208-8

1369-7072

Sports Engineering, 19 (4), 273-281

Institutional Repository

journal article

© 2016 E. van der Kruk, O. Den Braver (student), A.L. Schwab, F.C.T. van der Helm, H.E.J. Veeger