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Project Overview

The Intelligent Transportation System (Intelligent Transport System or Intelligent Transportation System, ITS for short) is an effective integration of advanced information technology, communication technology, sensor technology, control technology and computer technology for the entire transportation management system. A comprehensive, real-time, accurate, and efficient transportation and management system that functions in a wide range and in all directions. Countries such as Europe, the United States, and Japan began to invest in intelligent transportation in the 1990s and have always been in a leading position. The intelligent transportation in my country started late, and some intelligent transportation or similar intelligent transportation basic projects have been researched and applied. The main purpose is to conduct experimental research on urban traffic signal control. In the late 1990s, urban traffic signal control systems were introduced and digested in some large cities, and some (high-speed) highway monitoring systems, high-level highway electronic toll collection systems, and roadside information service systems were implemented. The functions developed by the China Intelligent Transportation Department include traffic monitoring and management, confidence services, safety assurance, electronic toll collection, and transportation management. In 1999, the Ministry of Public Security launched the construction activities on the 102, 107 national highways, and in 2000 it continued the construction activities on the 104, 312 national highways and all highways. At the same time, it implemented the "unblocking project" in 36 cities across the country, with the purpose of improving the level of traffic management. To demand police force from science and technology to meet the needs of China's modernization drive. The intelligent transportation system is very conducive to the continuous and automatic recording of the composition and flow distribution of the vehicles running on Pingan Avenue (national highway), and provides important basis and operational data for transportation planning, traffic management, and road maintenance departments. It provides important technical means and evidence for quickly correcting traffic violations, quickly detecting traffic accident escapes and motor vehicle theft cases, and is of great significance to the safe operation of urban traffic and improving the rapid response capability of highway traffic management.

When we go out to work every day, we have to deal with subways, buses, taxis, or private cars and bicycles, which is the most commonly used means of transportation. If we go far, we may take trains, ships, and planes, which are also a part of transportation. Maybe everyone has this kind of experience: congested rides and traffic jams delay everyone's precious time. Can we change the current traffic conditions, reduce traffic congestion, reduce traffic accidents, stop the deterioration of the traffic environment, and make modern transportation better serve economic construction? The intelligent transportation system comes into being.

The intelligent transportation system can be divided into three levels from the overall structure:

First, the perception layer

The perception layer mainly collects basic information through various M2M terminal devices, and then connects these M2M terminal devices through wired or wireless sensor networks, so that they look like a whole from the outside, and these M2M devices are like nerve endings In the same way, it is distributed in all links of transportation and continuously collects various types of information such as videos, pictures, and data.

Second, the network layer

The network layer mainly transports the information collected by the perception layer to the data center through the mobile communication network, and processes the data in the data center to form valuable information in order to make better control and services.

3. Application layer

The application layer is based on information, and works by presenting information to users in various ways for decision-making, service, and business development. This shows that the network layer is the core key layer of intelligent transportation.

solution

The front-end equipment is mainly responsible for collecting real-time traffic parameters and video image information, and preprocessing according to a certain format to convert the image's analog signals into digital signals, and relying on the video bearer network to transmit these signals to the upper command center. The command center completes the processing, storage, and release of traffic information, and shares traffic information with other application subsystems. The video bearing network based on optical fiber and cable establishes a communication channel for the interconnection between the front-end information collection, traffic information release and the ground road traffic data comprehensive processing platform (and the video image information exchange control platform of the camera and road traffic video surveillance system). Therefore, in the system architecture, the core of intelligent transportation is the video bearer network, which can be used to complete the required functions. How does the Ethernet platform ensure the efficient, smooth and safe transmission of these front-end images without jitter, mosaic, or loss to the back-end, which is convenient for back-end browsing and storage? Then we need to consider when setting up the Ethernet platform:

1) Near access of equipment and margin of bandwidth

2) Redundancy backup of the link

3) Network commissioning, fault diagnosis and troubleshooting

Product Features

Yaole Industrial Ethernet Switch, EMC industrial level 4 protection performance, can effectively resist the interference of static electricity, lightning strike, pulse; corrugated high-strength aluminum profile shell, IP40 protection, low power consumption design, anti-vibration rail installation, wide Industrial design of temperature -40℃-80℃, can work in harsh environments; POE switch ring network self-healing time ≤ 20ms, making the network more secure and reliable, 100M access, Gigabit uplink, port optimization, network management software, etc. The network data communication is more smooth, and the effect of zero packet loss and no lag is truly achieved. The POE function makes the construction cost more economical and has fewer nodes. This series of products is especially suitable for harsh industrial occasions such as intelligent transportation, energy, power, security, etc., providing them with fast and reliable communication connections.

Program features

1. In accordance with the principle conducive to future development, the backbone of this network uses Gigabit fiber ring network connection, and the front end uses 100M fiber to form a 100M redundant ring network (greater than the front-end nodes, the data is too large, you can also use Gigabit The optical fiber forms a gigabit ring network). It can be applied to the access of other services in the future, which is convenient for future network upgrade and network transformation. According to a certain number of nodes, it can be divided into multiple Gigabit optical ring networks.

2. All equipment in the network adopts industrial grade products independently developed and produced by Yaole. One is to ensure that the network can work normally in harsh environments and the average trouble-free running time of the network. The average trouble-free of each network node in the network Time (MTBF) is greater than 200,000 hours, ensuring the average time between failures of the entire network. The second is to ensure that the network can be restored to normal within ≤20ms after the use of Yaole's proprietary ring network protocol EPRS.

3. Dual-link bundling is used on the front-end to backbone switches to increase reliability on the one hand and bandwidth on the other. The ring network architecture and alarms based on multiple methods ensure the maximum impact of network disconnection and equipment damage on the overall network, which is the key and foundation for building a stable and reliable network.

4. All switches support VLAN and QOS functions to enable different services in the front end to be in different VLANs to ensure that data does not interfere with each other, and data with high priority is preferentially transmitted to the back-end platform.