Network distributed express highway monitoring system based on network interconnected protocol

Abstract

The network distributed express highway monitoring system based on internetwork protocol is a kind of equipment for simultaneously monitoring every monitored point on the express highway. The system has a bus virtual special-purpose data network formed from distributed monitoring data unit and monitoring computer which is set on every monitoring point, adopts transmission control protocol / internetwork protocol network protocol cluster and client / server mode and uses access network as communication platform, in which the distributed monitoring data unit is formed from network card, embedded industrial control machine, parallel processing board and communication control board, the embedded industrial control machine is series-connected with network card and vehicle parallel processing board, and the parallel processing board is respectively connected with communication control board.

Description

1. Technical field [0001] The invention is a device for simultaneously monitoring each monitored point on an expressway, in particular a distributed monitoring system based on a network interconnection protocol. 2. Background technology [0002] The expressway monitoring system integrates people, vehicles, and roads into a harmonious whole to realize its guidance, diversion and dispatch of traffic flow. This is achieved through outfield equipment such as vehicle detectors, weather detectors, remote cameras, variable information boards, and variable speed limit signs on the expressway. There are many types of outfield equipment along the road, and the number can reach hundreds . [0003] The goal of the monitoring system is to rationally use the traffic dispatching plan, guide and limit the traffic flow, reduce the incidence of traffic accidents, shorten the time of interruption of traffic due to accidents, and improve the speed of the expressway through the collection of va...

AI Technical Summary

Problems solved by technology

[0006] ① The level is not clear, and the software fastness is poor

A communication control machine is faced with various interface conditions, different line levels, and various transmission protocols. The communication software involves both high-level and complex low-level interface programming. It is difficult to ensure the monitoring and maintainability of the software.

The system is heavily burdened and prone to crashes

[0007] ②Complicated wiring and inconvenient maintenance

All the monitoring data lines will be connected to the MODEM and multi-serial port card of the monitoring center one by one, up to hundreds, so a distribution frame is required, which will affect the transmission quality and are often not used, so the wiring is more complicated

[0008] ③The reliability of the hardware is poor, there are many lines and hard connectors, and it is prone to failure over time, and it is not easy to maintain, dispatch and detect

[0009] ④Slow speed and poor real-time performance

[0010] ⑤ To change equipment and switch between active and standby, complex wiring makes it extremely difficult to add equipment and switch between active and standby

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