Roadway friction tester and method

Details Roadway friction tester and method Roadway friction tester and method

G - Physics

01

N

G01N 19/02 (2006.01) B60W 40/06 (2006.01) E01H 10/00 (2006.01)

Patent

CA 2513682

A method for measuring road surface friction of a road surface uses a vehicle (10) that moves across the road surface (18). An auxiliary wheel (24) is freely rotatable by movement of the vehicle (10) and is toed in (skewed) with respect to a direction of travel of the vehicle (10) so as to create an axial force on the auxiliary wheel (24). The axial force on the auxiliary wheel (24) is isolated and measured while the vehicle (10) moves across the road surface (18). The measured axial force is correlated with the road surface friction.

L'invention concerne un procédé de mesure du frottement d'une surface de roulement qui utilise un véhicule se déplaçant sur la surface de roulement. Une roue indépendante auxiliaire est interposée entre le véhicule et la surface de roulement. Cette roue auxiliaire peut tourner librement par le biais du mouvement du véhicule et elle est inclinée par rapport à un sens de déplacement du véhicule, de manière à créer une force axiale sur la roue auxiliaire. Cette force axiale sur la roue auxiliaire est isolée et mesurée, tandis que le véhicule se déplace sur la surface de roulement. La force axiale mesurée est corrélée au frottement d'une surface de roulement.

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