Pavement skid resistance real-time monitoring and early warning system for rainy and snowy weather

Abstract

The invention discloses a pavement skid resistance real-time monitoring and early warning system for rainy and snowy weather, which is a related device and system for carrying out real-time monitoringand danger early warning on skid resistance between vehicles and roads in various external environments, various vehicle types and various road sections in an all-weather mode. The system is composedof a pavement skid resistance monitoring unit, a driving environment monitoring unit, a driving information monitoring unit, a central computer processing unit and an skid resistance warning unit. According to the invention, monitoring and early warning are carried out on the pavement skid resistance based on a vehicle-road comprehensive environment, the actual skid resistance between the vehicleand the road in the driving process can be accurately, objectively and truly represented, especially in rainy and snowy severe weather, and the system can effectively warn and remind a vehicle driverto guide the vehicle driver to drive safely, can feed back the pavement skid resistance state in real time for road management and maintenance workers, and provides a reference basis for judging thereal-time driving safety performance of the road. The system has important practical engineering significance for improving the traffic safety guarantee.

Description

technical field [0001] The invention belongs to the technical field of road traffic safety, and in particular relates to a real-time monitoring and early warning system for anti-skidding of road surfaces in rainy and snowy weather. Background technique [0002] In the "people-vehicle-road" environment, in addition to the factors of human error, the key to the driving safety of the car lies in the relationship between the car and the road, and this relationship is mainly represented by the relationship between the tire and the road surface. The most critical thing is the friction performance between the tire and the road surface. The friction force between "vehicle and road" is necessary for the traction, braking and directional stability of the vehicle. The friction force between the tire and the road surface is related to many variables and is difficult to predict. Under certain driving conditions, especially on long downhill roads, sharp turning roads and high-speed roads...

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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