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Judgment method for truck overload

A determination method and technology for trucks, applied in vehicle testing, machine/structural component testing, instruments, etc., can solve the distortion of adhesion coefficient selection, it is difficult to define and give an objective vehicle speed identification conclusion, change and other problems to achieve the effect of high accuracy

Active Publication Date: 2020-02-07
哈尔滨明公科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After a traffic accident, the parameters such as the selection of the adhesion coefficient and the measured distance on the road surface became more uncertain due to the overload of the vehicle when evaluating its speed, and it has always been a difficult problem to correct it, especially for some The vehicle has been unable to operate normally after the accident, and the original vehicle cannot be used for simulation tests at the scene of the accident.
When dealing with such problems, serious uncertainties in the coefficient of adhesion under different loading conditions occur due to changes in braking deceleration due to vehicle overloading
At present, the selection method of adhesion coefficient and the actual ground distance measurement are no longer suitable for determining the speed identification of overloaded trucks, resulting in distortion of the selection of adhesion coefficient
However, there is a deviation between the actual braking distance and the test distance at the accident site, resulting in no drag marks formed between the tire and the ground or the formed marks are shorter than the actual distance, resulting in an increase in the uncertainty of the identification results
The calculation conclusion is inaccurate, it is difficult to define and give an objective vehicle speed appraisal conclusion, which increases the difficulty of the appraisal work

Method used

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  • Judgment method for truck overload
  • Judgment method for truck overload

Examples

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Embodiment 1

[0020] A truck overload judgment method, the first step is to select trucks with different axle numbers, different loading conditions of the trucks, and different initial speeds, the second step is to select the test site, and the third step is to measure the braking deceleration by using a braking decelerometer a; use the kinetic energy theorem to find the true value L of the braking distance at a certain speed; actually measure the road surface under various conditions at the accident test site to display the braking distance L; the fourth step is to use the braking deceleration to adhere to the road surface Functional relationship of coefficients (a=g ), to determine the actual road surface adhesion coefficient of the vehicle ;Use the test to obtain the data, use the statistical method to determine the relationship between the actual braking distance of the vehicle and the measured distance on the road surface, and finally obtain the correction coefficient K of the measur...

Embodiment 2

[0022] In the truck overload determination method described in embodiment 1, the first step is to select trucks with different axle numbers by three-axle trucks, four-axle trucks, and five-axle trucks; At 50%, 100% overload, 150% overload, and 200% overload, brake at different initial speeds of 40km / h, 50km / h, and 60km / h.

Embodiment 3

[0024] In the method for judging the overload of trucks described in embodiment 1, the second step is to select the test site as being dry, flat, and on an asphalt road surface with good adhesion conditions. Each of the five vehicles performs braking tests at speeds of 40, 50, and 60 km / h under no-load, full load, 50% overload, 100% overload, 150% overload, and 200% overload conditions.

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Abstract

The invention provides a truck overload determining method. The truck overload determining method comprises the steps of selecting trucks with different number of axles, different truck loading conditions and different initial speeds; selecting an experiment field; measuring a braking deceleration a by means of a braking deceleration meter; calculating an actual braking distance L at a certain speed by means of a kinetic energy theory; actually measuring a pavement display braking distance L at each condition at an accident experiment field; by means of a function relation between the braking deceleration and a pavement adhesion coefficient, determining an actual pavement adhesive coefficient phi of the truck; obtaining data through experiments, determining a relation between the actual braking distance and the pavement actual measuring distance by means of a statistics method, and finally obtaining a pavement actual measuring distance correction coefficient K; performing data processing by means of a regression analysis method, thereby obtaining a data analysis result. The truck overload determining method is used for determining truck overload.

Description

Technical field: [0001] The invention relates to a method for judging the overload of a freight car. Background technique: [0002] Since our country entered the 21st century, great progress and development have been made in road truck transportation, but the problem of overloading in the process of truck transportation has become more and more serious, which not only affects the road surface structure and use At the same time of life expectancy, it also seriously endangers the road traffic safety of our country and easily causes traffic accidents. [0003] Due to the serious overloading of trucks running on the road, the safe braking distance of trucks in the overloaded state increases during road driving, and the braking deceleration decreases, causing it to become a great hidden danger of inducing traffic accidents. The selection method of the adhesion coefficient and the actual ground distance measurement are no longer applicable to the identification of the speed of ov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 薛大维宋成举李振宇雷承玉张江滨
Owner 哈尔滨明公科技有限公司