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Continuous pavement friction coefficient testing method

A technology of road surface friction coefficient and testing method, which is applied in the field of testing, can solve the problem that the measurement method is not enough to reflect the friction between tires and roads, and achieve the effects of improving testing efficiency and testing speed, convenience and safety factor, and high measurement accuracy

Inactive Publication Date: 2008-01-23
张启明 +5
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Problems solved by technology

But it is a pendulum friction coefficient tester after all. With the in-depth research on vehicle dynamics, tire mechanics, and wheel-road interaction in recent years, people have realized that the measurement method of pendulum friction coefficient tester is not enough to reflect Friction between the tire and the road

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  • Continuous pavement friction coefficient testing method
  • Continuous pavement friction coefficient testing method

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Embodiment Construction

[0027] As shown in Figure 1, the continuous friction coefficient test device is composed of five parts: wheel speed detection unit 1, force detection unit 2, braking force control unit 3, ECU control unit 4 and host computer 5.

[0028] As shown in Figure 2, described continuous road surface friction coefficient testing method comprises the steps:

[0029] The first step is to detect the wheel speed signal and obtain the slip rate S of the wheel: the two wheel speed signals of the test wheel 6 and the auxiliary wheel 7 obtained by the detection of the wheel speed sensor are transmitted to the ECU control unit 4, and the slip ratio of the wheel is calculated. Mobility S.

[0030] According to the research results of automobile dynamics and tire mechanics, the road friction coefficient φ (that is, the wheel adhesion coefficient) changes with the change of the wheel slip rate S. Fig. 3 provides a comparative diagram of the relationship between wheel slip and longitudinal adhesio...

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Abstract

The invention discloses a continuous testing method for road-surface frictional coefficient, which comprises the following procedures: the wheel-speed signal is detected, the glide rate of the wheel is obtained; an ECU control unit controls and adjusts the brake-force adjusting unit based on the calculated glide rate, adjusts the glide rate of the wheel to 100% or controls in 15-25%; the ECU control unit carries out synchronous tuning on the detected braking force and normal force between the wheel and the ground, calculates the corresponding slide friction coefficient or road peak frictional coefficient of the road. In above procedure, the ECU control unit meanwhile loads the measured data to an up-level unit for displaying, saving and processing. The method is of simple procedures, safe, efficient and accurate, while measuring the slide frictional coefficient of the road, can also measure the peak frictional coefficient of road for the peak adhesion coefficient corresponding to the operation range of the ABS system, and can realize hi-speed continuous detection of frictional coefficient.

Description

technical field [0001] The invention relates to a test method, in particular to a continuous road surface friction coefficient test method for testing the road surface friction coefficient and assessing the anti-skid performance of the road surface. Background technique [0002] At present, the pendulum friction coefficient meter is mainly used in the test of longitudinal anti-skid ability of pavement in my country. As a traditional road testing instrument, the pendulum friction coefficient meter uses the frictional resistance generated at the moment of contact between the potential energy of the pendulum and the road surface under certain conditions to measure the friction coefficient. It has played a greater role in road construction and maintenance for a long time . However, with the rapid development of my country's highway traffic and the rapid increase in the mileage of high-grade highways, the traditional pendulum friction coefficient meter has become less and less s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/02
Inventor 张启明田见校马建王雨臣陈德迎范陆军
Owner 张启明
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