Group Fog Monitoring and Guidance Plan

1. Overview

Traffic accidents are very likely to occur when the highway encounters special weather such as fog. In particular, the danger of dense fog on some road sections is the cause of many major safety accidents. When driving from a normal road section into a dense fog area at high speed, due to the sudden change in visibility, the field of vision becomes blurred, and the isolation piers and guardrails are difficult to identify. The driver is prone to judgment and operational errors. The high-speed and high-traffic nature of the highway determines Once an accident occurs in foggy weather, it will often cause a chain reaction, eventually leading to a catastrophic traffic accident in which multiple vehicles rear end in succession. Therefore, it is extremely important to focus on taking certain monitoring and early warning measures for these dense fog-prone road sections, and to strengthen highway traffic control in heavy fog weather. Fog area monitoring and intelligent guidance technology are the key to highway traffic control under heavy fog and group fog conditions. Effective auxiliary means.

2. System Composition

The highway fog area monitoring and intelligent guidance system includes a fog area visibility information collection unit, an intelligent fog area active guidance unit, and a system control unit. Each unit coordinates and transmits visibility information to the monitoring center (traffic safety management) in real time. Real-time decision-making and control.

3. Introduction To Main Units

(1) Fog area visibility information collection unit

It is mainly composed of visibility detector, power supply unit, communication unit and software. The system is constructed using a network operation mode to continuously obtain visibility meteorological information from multiple points along the route, and can complete the summary and distribution of similar data through remote transmission and transmit it to the traffic safety management department in a timely manner.

(2) Intelligent fog area active guidance unit

The key function of this unit is to realize intelligent fog light guidance and anti-collision warning functions in fog areas. It can automatically start and adjust the fog light emission and flashing according to changes in fog concentration to ensure that vehicles on the road can clearly see the direction and width of the road ahead. and multiple road details; the anti-collision warning function has functions such as rear-end collision warning in foggy areas, driving distance detection and distance warning, etc. This unit can prevent the harm of "cluster fog" to the safe operation of road traffic, and can effectively reduce or avoid rear-end collision accidents in fog areas.

4. System Data Transmission Method

Since highway cable laying and renovation are expensive, and the GPRS/CDMA mobile network coverage and stability are already very complete, the system data can use GPRS/CDMA wireless data transmission. Of course, if the wired communication network is mature, the original wired communication network can also be used for data transmission.

5. System Power Supply

The system power supply is divided into two modes: 220VAC AC mains power and 12VDC solar DC power supply. In principle, use AC mains power as much as possible. In special circumstances, solar power can be used in places where mains power cannot reach.

Application Case