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View Full Version : treadmill vs vicon vs insole pressure sensors



jbrownjohn18
07-16-2005, 07:28 AM
As a structural engineer, I have interests in determining directly or indirectly the 3D contact forces between a pedestrian and a structure (e.g. bridge or floor).

Ultimately it would be great to be able to measure these forces for a structure that moves significantly.

This is (still) an interesting topic in structural engineering and leads into identification of physical explanations for observed phenomena.



Without having something like a 3D tekscan or array of force plates covering the entire walking area it would seem impossible to measure directly and I’m not sure if Vicon can be used well in extended open areas. So for now getting reliable continuous footfall force data probably needs to be constrained to the lab.



Treadmills (e.g. ADAL 3D) appeal for a number of reasons, but naturally there is a question about the validity due to the artificial condition of not actually moving forwards and maintaining a constant speed.



Alternatives could be Vicon system (which I guess requires knowledge of body mass distribution) and insole or other footwear (but I want forces in a constant Cartesian axis system).



Can anyone point me to research that compares force identification methods or can anyone offer their €0.02 worth?



James MW Brownjohn

Professor of Structural Dynamics

Vibration Engineering Section

Department of Civil and Structural Engineering

University of Sheffield

Mappin Street

SHEFFIELD S1 3JD

james.brownjohn@sheffield.ac.uk