A real-time monitoring and early warning system for road surface skid resistance in rainy and snowy weather

Abstract

The invention discloses a road surface anti-slip real-time monitoring and early warning system for rainy and snowy weather. And related devices and systems for hazard warning. The system consists of five parts: road surface anti-skid monitoring unit, driving environment monitoring unit, driving information monitoring unit, central computer processing unit and anti-skid warning unit. The invention monitors and warns the anti-skid ability of the road surface based on the "vehicle-road" comprehensive environment, and can accurately, objectively and truly characterize the actual anti-skid ability between the vehicle and the road during driving, especially in rainy and snowy weather , can effectively warn and remind vehicle drivers, guide them to drive safely, and provide real-time feedback to road management and maintenance workers on the anti-skid status of the road surface, providing a reference for real-time road safety performance evaluation. The invention has important practical engineering significance for improving traffic safety guarantee.

Description

Technical field [0001] The present invention belongs to the technical field of road traffic safety, and specifically, there is a road surface anti-slip real-time monitoring warning system for rain and snow weather. Background technique [0002] In the "People-Road" environment, in addition to the factors of human operation, the key to driving safety is related to the relationship between the car and the road, and this relationship is mainly characterized between the tire and the road surface, of which The most critical is the friction performance between the tire and the road surface. The friction between the "Car - Road" is necessary for the traction, braking and direction of the vehicle, and the size of the friction between the tire and the road surface is related to many variables, and it is difficult to predict. At a certain driving condition, especially at high speed pavements under the long chart, the sharp turn section and the rain and snow weather conditions, if the frict...

AI Technical Summary

Problems solved by technology

[0005] At present, although there are many ways to characterize the anti-skid performance of pavement, due to the complexity of factors affecting the anti-skid performance of pavement, the current evaluation methods and indicators have great limitations.

For the method of evaluating pavement antiskid performance through pavement texture, firstly, the method has relatively large human influence factors, and it is a single-point non-continuous detection, and the representativeness of the data is not good; secondly, there is a certain gap between the pavement texture condition and pavement antiskid resistance. However, with the difference in pavement materials and structures, the relationship is not clear and unified, so the scientificity of this index is questionable; moreover, this detection method describes the condition of dry road surface, and vehicle slippery mostly occurs in rainy and snowy wet conditions. slippery state, so there is still a big difference between this index and the actual use state of the road surface

Compared with the indirect geometric model, although the direct mechanical performance evaluation model considers certain external factors and is closer to the actual use of the pavement, due to the solidification of the test conditions, this method also has great shortcomings

The current continuous lateral force coefficient test methods all need to fix tire pressure, axle load, vehicle speed, water film thickness and other factors, and the later results also need to be corrected by temperature to make a unified judgment, but it is difficult to control the water film thickness in actual operation The accuracy of temperature and speed correction coefficients needs to be further verified

The most important thing is that the actual usage conditions of the vehicle (tire pressure, axle load, vehicle speed) and the road surface (water film thickness, temperature) are complex and changeable, rather than deterministic controllable factors. The comprehensive performance of the road environment, and the concept of studying the performance of the road surface itself through fixed driving factors and external conditions has certain limitations in terms of evaluating driving safety.

At present, all pavement anti-skid performance tests are still on the evaluation of pavement performance, and guide road managers to carry out road maintenance work. In actual situations, good road entities will also have insufficient anti-skid ability in rainy and snowy weather. danger, endangering driving safety

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