Intelligent traffic light control system with digital signal processing (DSP) function

Abstract

The invention relates to the research based on an urban road transport intelligent traffic light control system, and provides a system which comprises an image data acquisition circuit, a DSP (digital signal processing) analysis and processing system, an I / O (input / output) extension unit, a driving array and a signal light display unit. The functions such as image A / D (analog to digital) conversion, image analysis and processing, real-time image display and time sequence control are realized by adopting a DSP chip. By analyzing and processing video images, vehicles in different shapes, structures and colors are accurately identified, quantities of static vehicles on the left-turn road, the straight road, the right-turn road and the roadway of a crossroad or the occupied length of the static vehicles are identified instantaneously, and corresponding green light time duration is determined according to the quantities of vehicles on different lanes. A DSP technology is for the first time applied to the intelligent traffic light control field, control on traffic lights through a remote network and intersection single points is realized, the traffic signal light time control period can be regulated and controlled, and the system has positive practical significance in improving traffic capacity and reducing traffic accidents.

Description

technical field [0001] The invention belongs to the technical field of urban road traffic control. The present invention is a digital signal processing (DSP) intelligent traffic light control system capable of giving the length of the green light according to the number of static vehicles at each intersection. The system can realize network control and single-point control of urban road traffic intersection signal lights , The control period of the signal light is variable, adjustable and controllable. The invention has positive practical significance for improving the safe traffic capacity of highway motor vehicles and reducing the occurrence of road traffic accidents, and has far-reaching influence in the field of social management innovation. Background technique [0002] In recent years, with the continuous deepening of reform and opening up and the rapid development of the national economy, people's living standards have generally improved, and automobile consumption h...

AI Technical Summary

Problems solved by technology

In big cities or bustling roads and intersections, due to the large traffic volume, the waiting time for vehicles concentrated at the intersection is relatively long. Even if there is no vehicle passing through the road section, the oncoming and the same direction vehicles have to wait for the next light cycle before they can pass, which artificially causes traffic jam at the intersection

In order to solve these contradictions and problems, it is necessary to break the "fixed period" signal control mode, and completely solve the technical problem that the dynamic identification control mode products cannot judge the number of vehicles waiting to pass in the left-turn, straight-going, and right-turning lanes.

At present, traffic light control systems all adopt single-chip microcomputer, PC, embedded industrial computer to realize the analysis and processing of image signals, which have poor stability, complex structure and high cost. The present invention utilizes DSP Based on the advantages of small chip size, high integration, high performance, high speed and low price, research and development based on DSP technology can identify "variable cycle" control mode in lanes under "static" (red light) state The system makes the length of the green light of the signal light proportional to the number of "static" vehicles turning left, going straight, and turning right, so as to effectively alleviate the congestion problem at the intersection

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