Intelligent traffic control system for controlling access connection traffic flow

Abstract

The invention relates to an intelligent traffic control system for controlling traffic flow at an intersection. The control system is composed of traffic signal control machine, central computer, Ethernet communication system, intersection signal lights and related equipment. The traffic signal control machine of the system uses a high-precision real-time clock chip to provide accurate clock signals, which can effectively improve the accuracy of the light color sequence, and can display and set time, calendar and other information at the same time. Real-time traffic information. The microprocessor of the signal control machine system expands the I / O through the programmable logic controller CPLD, and drives the intersection signal light through the photoelectric isolation and driving circuit, so as to realize the reliable output of the color of the intersection signal light. In the present invention, the signal control machine is directly connected to the Ethernet through the Ethernet controller, which effectively improves the real-time and reliability of the system data transmission; the monitoring center integrates the real-time traffic flow information of each intersection according to the historical traffic flow information, and checks the traffic flow data Analysis and processing, and the use of intelligent optimization methods to generate optimal control schemes can realize regional coordinated control of urban traffic flow and maximize the efficiency of urban traffic flow.

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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