A CFME apparatus for continuously measuring coefficient of friction of a paved runway or paved road at any speed up to 105 kilometers per hour with improved efficiency for more precise measurements on ice-contaminated pavement, the improved precision being achieved by reducing the standard deviation in the file of recorded measurements normally recorded at an average rate of one measurement per second includes a frame attached to a vehicle mounting a vertical rotatable shaft pivotally carrying a suspension arm trailing rearwardly and downwardly so as to carry a test wheel at a rear end thereof in a wheel plane different from a forward plane to swivel about an upstanding axis in response to a torque applied to the suspension arm about the upright axis by the test wheel. A sensor is responsive to changes in the angle between the forward plane and the wheel plane caused by changes in coefficient of friction. A divider shield separates the test wheel, the suspension arm and the lower end of the upstanding member below the divider shield from the sensor at the upper end. A vibration damping coupling is provided between the mounting of the suspension arm and the upper end of the vertical shaft.


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    Titel :

    Apparatus for measurement of road surface friction


    Beteiligte:
    BROWN GLEN (Autor:in)

    Erscheinungsdatum :

    15.09.2020


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F16M Rahmen, Gehäuse oder Grundplatten von Kraftmaschinen oder anderen Maschinen oder von Apparaten, nicht auf eine besondere Art von Maschine oder Apparat eingeschränkt, die anderweitig vorgesehen ist , FRAMES, CASINGS, OR BEDS, OF ENGINES OR OTHER MACHINES OR APPARATUS, NOT SPECIFIC TO AN ENGINE, MACHINE, OR APPARATUS PROVIDED FOR ELSEWHERE



    APPARATUS FOR MEASUREMENT OF ROAD SURFACE FRICTION

    BROWN GLEN | Europäisches Patentamt | 2022

    Freier Zugriff

    Road surface friction measurement, methods and machines

    Allsopp,H.C. / Motor Industry Research Association,GB | Kraftfahrwesen | 1985



    ROAD SURFACE FRICTION COEFFICIENT ESTIMATION APPARATUS

    KODERA HARUHIRO / SHIMOZATO SHUNJI / TOYODA HIROMITSU | Europäisches Patentamt | 2017

    Freier Zugriff