Device for determining coefficient of adhesion of pneumatic whee

Details Device for determining coefficient of adhesion of pneumatic whee Device for determining coefficient of adhesion of pneumatic whee

1977-10-26

1979-03-20

Woodiel, Donald O.

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

73 9, G01N 1902

Patent

active

041447484

ABSTRACT:
The present invention relates to measuring techniques intended to determine the operational characteristics of a road pavement by assessing the braking conditions of transport vehicles. The device comprises a single-axle trailer whose frame is coupled by a tow pole to a towing vehicle. The trailer has only two wheels adapted for rotating on the moving trailer with longitudinal slipping in opposite directions. The device also comprises a recording instrument with a sensitive element which is located between the trailer frame and the free end of the pole and is kinematically linked therewith in such a manner that on the moving trailer the sensitive element is acted upon by a force which is proportional in magnitude to the sum of absolute values of the longitudinal traction forces acting on the wheels and is directed essentially parallel to the forces. Such a device will allow measuring the coefficient of adhesion with a maximum possible accuracy as compared with the prior art devices; in addition, it is quite simple in design and operation which ensures its successful and efficient employment on airfields.

REFERENCES:
patent: 4050290 (1977-09-01), Lonnroth

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