Photoelectric friction coefficient tester

A friction coefficient, measuring instrument technology, used in instruments, measuring devices, mechanical devices, etc., can solve the problems of inability to realize dynamic testing, errors, inaccurate sliding lengths, etc.

Active Publication Date: 2012-04-25
交通部公路科学研究院
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  • Abstract
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Problems solved by technology

[0012] However, when using this pendulum friction coefficient measuring instrument for measurement, errors may be caused by the following reasons: 1) Since the friction length is statically calibrated before swinging, the actual sliding length of the sliding block and the measured object during the swinging process Inaccurate; 2) The positive pressure of the slippery block on the road surface adopts the static calibration maximum value, which cannot realize the dynamic test during the test process, and there is a deviation from the real-time changing pressure during the actual swing process; 3) Caused by artificial readings error
Therefore, the accuracy of the friction coefficient of the measured road surface is not high.

Method used

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Embodiment Construction

[0020] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0021] figure 1 It is a front view of the photoelectric friction coefficient measuring instrument 1 of the present invention. in the figure 1 in, right with figure 2 The same components in the prior art shown in , are labeled with the same reference numerals, since these components are basically the same in structure and function in the prior art, and have been described in the background technology section above, so they are omitted here A detailed description of it. Such as figure 1 As shown, the photoelectric friction coefficient measuring instrument 1 has: a main body support, a pendulum, an angle encoder 2 , a specimen holder 50 , and a force sensor 3 . The main body support includes a base 21 and a column 22 fixed on the base 21. The base 21 is fixed on the ground or table by a plurality of leveling screws, and the height of each point can b...

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Abstract

The invention provides a photoelectric friction coefficient tester, comprising a main body bracket, a pendulum bob, an angle coder, a force transducer and a processor, wherein the pendulum bob is arranged on the main body bracket in a mode of pendulating relative to the main body bracket, the angle coder measures the pendulating angle of the pendulum according to time change and measures parameters such as the largest deflection angle and the like after friction, the force transducer measures the positive pressure on a test piece acted by the pendulum according to time change, and the processor is connected with the angle coder via a data transmission line, and processes the data collected by the angle coder and the force transducer, namely, calculates the speed before and after friction according to the relation between the pendulating angle and the time, and then calculates the friction coefficient of the surface of the test piece to be tested according to the educed parameters suchas the largest deflection angle, the relation between the positive pressure and the time, etc.

Description

technical field [0001] The invention relates to a friction coefficient measuring instrument, in particular to a pendulum type friction coefficient measuring instrument. Background technique [0002] With the development of transportation, the anti-skid problem of road surfaces such as highways, urban roads and airport runways has attracted the attention of relevant departments. There are various instruments for measuring the coefficient of friction of roads on the market. The results of measuring the coefficient of friction of typical road surfaces with these friction coefficient testers can be used as one of the basis for evaluating road performance and optimizing tire formula. For example figure 2 The BM-II pendulum friction coefficient tester shown in is a typical measuring instrument, which belongs to the dynamic pendulum impact type instrument, which can detect the surface friction coefficient of pavement materials indoors, and can also be used to detect the local pave...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/02
Inventor 曹东伟唐国奇刘清泉
Owner 交通部公路科学研究院
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