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  4. Development of a New Embedded Dynamometer for the Measurement of Forces and Torques at the Ski-Binding Interface
 
research article

Development of a New Embedded Dynamometer for the Measurement of Forces and Torques at the Ski-Binding Interface

Meyer, Frederic
•
Prenleloup, Alain  
•
Schorderet, Alain  
October 1, 2019
Sensors

In alpine skiing, understanding the interaction between skiers and snow is of primary importance for both injury prevention as well as performance analysis. Risk of injuries is directly linked to constraints undergone by the skier. A force platform placed as an interface between the ski and the skier should allow a better understanding of these constraints to be obtained to thereby develop a more reliable release system of binding. It should also provide useful information to allow for better physical condition training of athletes and non-professional skiers to reduce the risk of injury. Force and torque measurements also allow for a better understanding of the skiers' technique (i.e., load evolution during turns, force distribution between left and right leg ...). Therefore, the aim of this project was to develop a new embedded force platform that could be placed between the ski boot and the binding. First, the physical specifications of the dynamometer are listed as well as the measurement scope. Then, several iterations were performed on parametric 3D modeling and finite element analysis to obtain an optimal design. Two platforms were then machined and equipped with strain gauges. Finally, the calibration was performed on a dedicated test bench. The accuracy of the system was between 1.3 and 12.8% of the applied load. These results show a very good linearity of the system, which indicate a great outcome of the design. Field tests also highlighted the ease of use and reliability. This new dynamometer will allow skiers to wear their own equipment while measuring force and torque in real skiing conditions.

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Type
research article
DOI
10.3390/s19194324
Web of Science ID

WOS:000494823200268

Author(s)
Meyer, Frederic
Prenleloup, Alain  
Schorderet, Alain  
Date Issued

2019-10-01

Published in
Sensors
Volume

19

Issue

19

Article Number

4324

Subjects

Chemistry, Analytical

•

Engineering, Electrical & Electronic

•

Instruments & Instrumentation

•

Chemistry

•

Engineering

•

Instruments & Instrumentation

•

alpine skiing

•

force platform

•

giant slalom

•

elite athletes

•

field testing

•

code modulation telemetry

•

injury research

•

system

•

leg

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMAF  
Available on Infoscience
November 21, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/163299
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