Intelligent traffic control system for controlling access connection traffic flow

Abstract

The invention relates to an intelligent traffic control system for controlling traffic stream in intersection. The control system is composed of a traffic signal controller, a center computer, an Ethernet communication system, a traffic lamp in intersection, and related equipment. The traffic signal controller adopts a high-accuracy real-time clock chip for providing accurate clock signal and effectively improving the accuracy of time sequence of lamp color and simultaneously can display and set time and calendar information. The traffic signal controller has a vehicle inductive detection control interface for inputting real-time traffic stream information. The microprocessor of the signal controller system can an I / O port expanded by a programmable logic controller CPLD and is used for driving the traffic lamp after photoelectrical isolation and drive circuit so as to achieve reliable color output of traffic lamp. In the invention, the signal controller is directly connected with the Ethernet through the Ethernet controller, which can effectively improve the data transmission real-time performance and reliability. The monitor center analyzes and processes the traffic stream data according to the history traffic stream information as well as the real-time traffic stream information of each intersection, and generates an optimal control scheme by an intelligent optimization method, thereby achieving regional coordination control of urban traffic stream and maximally improving the traffic efficiency of the urban traffic stream.

Description

technical field [0001] The invention relates to an intelligent traffic control system for controlling traffic flow at an intersection. Background technique [0002] The existing domestic traffic control systems have the following obvious defects: 1. The existing intersection traffic signals generally have limited functions, and they lack flexible applications for light color control methods, sensor control, self-diagnosis and function expansion. 2. It has communication functions, but most of them are low-speed serial communication interfaces, which are difficult to meet the reliability and real-time requirements of the system. As a result, different traffic demands generated during different traffic conditions and emergencies often need to be maintained by human assistance Traffic order; a small number of traffic signals provide an Ethernet interface, but either use a serial port to network interface device, or use a network chip with many pins, which makes the control compl...

AI Technical Summary

Problems solved by technology

[0002] The existing domestic traffic control systems have the following obvious defects: 1. The existing intersection traffic signals generally have limited functions, and they lack flexible applications for light color control methods, sensor control, self-diagnosis and function expansion

2. It has communication functions, but most of them are low-speed serial communication interfaces, which are difficult to meet the reliability and real-time requirements of the system. As a result, different traffic demands generated during different traffic conditions and emergencies often need to be maintained by human assistance Traffic order; a few traffic signals provide an Ethernet interface, but either use a serial port to network interface device, or use a network chip with many pins, which makes the control complicated and expensive

3. The network topology adopted by the existing signal control machine system generally has a short transmission distance. The longer the distance, the worse the anti-interference ability of data transmission, and the implementation method is quite complicated and costly

4. Existing traffic control systems seldom use advanced intelligent algorithms to analyze historical traffic flow and real-time traffic flow information to generate optimal solutions to achieve intelligent control of urban traffic flow

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