Highway tunnel intelligence changes the development of domain of supervisory sys

From;  Author:Stand originally

1, the system controls mode

Control is the basic measure that achieves goal of channel supervisory system. From consideration of construction of system, systematic control should control systematic work up to be spot control from distributing center type, the dependability that improves a system thereby, convenient sex that maintains an operation and reduce project cost, use technology of spot bus line, by FCS (control without the center) replace present DCS (distributing center type is controlled) with PLC (but process designing is controlled) the inevitable trend that is development; Spot bus line opens as a kind, the communication system of complete digitlization, two-way, much station, received swift and violent development and application in recent years, have an agreement to be opened simply, fault tolerance ability sex of strong, real time tall, security good, cost is low, comfortable wait for a characteristic at frequent exchange, change in channel intelligence wide application received in monitoring.

The spot bus line that uses at present, modular distributed control system, main component is 3 series:

(1) the Openline series that is based on aether net and Modbus communication agreement;

(2) the MicroDAC that is based on Optomux and Modbus communication agreement, openDAC, openLT series;

(3) be based on Lonworks of spot bus line, device, the Microlon of Profibus, dacNet series.


2, systematic network configuration

To ensure channel intelligence changes the safety of supervisory system and high reliability, should use Chinese hackberrya of develop of self-healing annulus net configuration, advantage of simple structure of develop of self-healing annulus net is outstanding, if open circuit produces in the somewhere of annulus net, it makes network of automatic and new configuration communication is able to continue.

3, device control character

According to circumstance of the traffic situation of channel inside and outside, weather situation, wagon flow, right equipment of each traffic control undertakes be controllinged remotely inside channel, through central control the center conveys the PLC of the spot; The operation instruction that the center controls in the center of the PLC basis of the spot has all sorts of operations, the operation information returns central control center in real time. Each PLC can be below the circumstance that controls central occurrence breakdown, undertake the system is controlled independently, because used annulus network structure, mutual communication is checked between each PLC, real time masters the moving state of each PLC. Device control character still includes the monitoring of the equipment such as communication, broadcast, fire control.

4, condition is surveillant

Centrally controls central monitor to go up, carry electronic map, direct response gives the image data inside channel, real time shows all traffic inside channel to control equipment, fire control equipment, ventilated device, change the picture of situation of the transportation inside the working status of distribution facilities and channel.
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