EP1158096B1 - Vorrichtung zur Wiedergabe der Strassenhaftung eines Fahrzeuges - Google Patents

Vorrichtung zur Wiedergabe der Strassenhaftung eines Fahrzeuges Download PDF

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Publication number
EP1158096B1
EP1158096B1 EP01401382A EP01401382A EP1158096B1 EP 1158096 B1 EP1158096 B1 EP 1158096B1 EP 01401382 A EP01401382 A EP 01401382A EP 01401382 A EP01401382 A EP 01401382A EP 1158096 B1 EP1158096 B1 EP 1158096B1
Authority
EP
European Patent Office
Prior art keywords
coating
spherical elements
vehicle
reproducing
microbeads
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01401382A
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English (en)
French (fr)
Other versions
EP1158096A1 (de
Inventor
Christophe Ramaen
Jean-Pierre Gaud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Direction General pour lArmement DGA
Etat Francais
Original Assignee
Direction General pour lArmement DGA
Etat Francais
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Direction General pour lArmement DGA, Etat Francais filed Critical Direction General pour lArmement DGA
Publication of EP1158096A1 publication Critical patent/EP1158096A1/de
Application granted granted Critical
Publication of EP1158096B1 publication Critical patent/EP1158096B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C9/00—Special pavings; Pavings for special parts of roads or airfields

Definitions

  • the present invention relates to the field of adhesion testing of vehicles more particularly on snow-covered ground or covered with wet grass and has for object a device capable of reproducing the characteristics adhesion of such soils.
  • Another solution is to carry out tests on wet grass. This solution is technically acceptable but the rapid degradation of the land does not not allow successive tests to be carried out under the same conditions.
  • a less expensive solution consists of a concrete coating with a very smooth finish.
  • the coefficient of adhesion obtained by watering is approximately 0.3 ce which is close to the one on snowy ground.
  • the value of said coefficient is not not modifiable and the necessary presence of expansion joints causes variations in said coefficient detrimental to the accuracy of the tests.
  • this solution involves risks of resumption of adhesion on the expansion joints as well that a non-homogeneity of the adhesion.
  • Another solution consists of a floor made of glass and onto which is projected water: However this solution is more like aquaplaning simulations than rolling on snow. In addition, this solution is very expensive.
  • the object of the invention is to remedy the aforementioned drawbacks by proposing a device capable of reproducing the grip characteristics of snow-covered ground or covered with wet grass, especially for wheeled vehicles whose mass is between 0.5 and 40 tonnes and also suitable for use anywhere and whatever the season.
  • the solution provided is a device capable of reproducing the characteristics grip of a vehicle on snowy ground or covered with wet grass, device characterized in that it comprises a coating on which are arranged several layers of spherical elements, the spherical elements of the upper layers being able to roll one over the other.
  • the spherical elements consist of microbeads and / or microspheres.
  • the coating has surface roughness allowing microbeads from the lower layer to lodge there.
  • the coating consists of cement and preferably calcareous sand-cement with a polishing coefficient perhaps accelerated by 0.37 and the percentage of cement is 6.5% by mass.
  • all or part of the spherical elements have a diameter between 200 and 4000 micrometers.
  • the spherical elements are made of glass.
  • the microbeads form, on the coating a layer of 2 to 6mm.
  • Figure 1 shows a device capable of reproducing the characteristics grip of a vehicle on snowy ground or ground covered with wet grass.
  • This device consists of a coating 1 on which microbeads 2 are arranged on several thicknesses or layers 5, 6. These microbeads are free on the coating and also between them.
  • the coating is made of limestone cement sand with a coefficient of accelerated polishing is 0.37 and the percentage of cement of approximately 6.5% in mass.
  • This coating is perfectly flat and produced in the form of a 90 cm disc. meters in diameter and preferably includes a recovery channel on its entire lower periphery to prevent microbeads from being entrained beyond of the coating.
  • the microbeads 2 are, in this embodiment, all substantially of the same diameter, or about 1000 micrometers. The quantity is sufficient to ensure a total thickness of the microbeads of 3 to 4mm.
  • the coating 1 has roughness 3 which the function is to prevent the entrainment of all the microbeads during the passage of a vehicle.
  • the vehicle to be tested tows a screen, the function of which is to homogeneously re-spread the microbeads.
  • microbeads In the absence of such a towed mesh, microbeads must be upgraded when the vehicle has twenty passages.
  • the roughness of the coating allows the microbeads to the lower layer 4 to lodge therein and thus, the upper layers of microbeads 5 and 6, roll relative to each other with little friction.
  • Microbeads of layer 4 are not driven in the direction of movement of the vehicle. As a result, there is almost never an unexpected recovery in grip and turns can be carried out without degrading the adhesion conditions.
  • the coefficient of adhesion obtained is about 0.3.
  • the coating could have a different shape from a disc, for example the shape of a road or a running circuit large enough to be able to perform baffle tests and turns, making it possible to check the behavior of vehicles on curves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Tires In General (AREA)
  • Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Road Signs Or Road Markings (AREA)

Claims (9)

  1. Vorrichtung zur Wiedergabe der Haftungseigenschaften eines Fahrzeugs auf einem mit Schnee oder feuchtem Gras bedeckten Boden, dadurch gekennzeichnet, daß sie einen Belag (1) aufweist, auf welchem mehrere Schichten (5; 6) kugelförmiger Elemente (2) angeordnet sind, wobei die kugelförmigen Elemente relativ zueinander rollen können.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die kugelförmigen Elemente (2) aus Mikrokugeln bestehen.
  3. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß der Belag (1) Unebenheiten (3) an der Oberfläche aufweist, die es ermöglichen, daß sich die Mikrokugeln der unteren Schicht in diesen Unebenheiten anordnen.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Belag aus kalkhaltigem Zementsand besteht.
  5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der beschleunigte Schleifkoeffizient des den Belag bildenden kalkhaltigen Zementsands 0,37 beträgt.
  6. Vorrichtung nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß der Anteil des Zements etwa 6,5 Massen-% beträgt.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die kugelförmigen Elemente einen Durchmesser zwischen 200 und 4000 Mikrometern aufweisen.
  8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die kugelförmigen Elemente aus Glas bestehen.
  9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die kugelförmigen Elemente (2) über dem Belag (1) eine Schicht von 2 bis 6 mm bilden.
EP01401382A 2000-05-26 2001-05-28 Vorrichtung zur Wiedergabe der Strassenhaftung eines Fahrzeuges Expired - Lifetime EP1158096B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0006756 2000-05-26
FR0006756A FR2809422B1 (fr) 2000-05-26 2000-05-26 Dispositif apte a reproduire les caracteristiques d'adherence d'un vehicule sur un sol enneige ou recouvert d'herbe humide

Publications (2)

Publication Number Publication Date
EP1158096A1 EP1158096A1 (de) 2001-11-28
EP1158096B1 true EP1158096B1 (de) 2003-10-08

Family

ID=8850655

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01401382A Expired - Lifetime EP1158096B1 (de) 2000-05-26 2001-05-28 Vorrichtung zur Wiedergabe der Strassenhaftung eines Fahrzeuges

Country Status (5)

Country Link
EP (1) EP1158096B1 (de)
AT (1) ATE251694T1 (de)
DE (1) DE60100922T2 (de)
ES (1) ES2208531T3 (de)
FR (1) FR2809422B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2858337B1 (fr) * 2003-07-31 2005-10-14 France Etat Armement Dispositif apte a reproduire les caracteristiques d'adherence heterogene d'un vehicule
CN106906713A (zh) * 2017-03-10 2017-06-30 泰州夏北新型绿色建材科技有限公司 一种改进结构的植草砖

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR726252A (fr) * 1930-11-16 1932-05-26 Procédé de pavage
US2555078A (en) * 1946-05-21 1951-05-29 Peter J Gaylor Skating surface
FR2656014B1 (fr) * 1989-12-19 1992-04-03 Lefoll Pierre Revetement pour court de tennis.
US5352062A (en) * 1991-09-13 1994-10-04 Nippon Hodo Company, Limited Skid road surface and method for constructing same
AUPM388794A0 (en) * 1994-02-16 1994-03-10 Kelly, Luke Gregory Beadcrete

Also Published As

Publication number Publication date
EP1158096A1 (de) 2001-11-28
DE60100922T2 (de) 2004-09-09
FR2809422A1 (fr) 2001-11-30
DE60100922D1 (de) 2003-11-13
ATE251694T1 (de) 2003-10-15
FR2809422B1 (fr) 2003-08-01
ES2208531T3 (es) 2004-06-16

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