Monitoring system of safety and efficiency of traffic signal of intersection

Abstract

The invention relates to a monitoring system of the safety and the efficiency of a traffic signal of an intersection. The monitoring system is provided with a color video camera in each direction of the intersection and used for intelligently detecting and identifying traffic signal lights and driving conditions of vehicles to monitor the safety and the efficiency of the traffic signal of the intersection by locally operating an image processing algorithm on a video board, identifying the states of the traffic signal lights from video images to monitor whether traffic signal control or the traffic signal lights are abnormal or not, detecting the red light running of the vehicles from the video images to judge whether yellow light retaining time is set to be great short and an electronic police is necessarily arranged to reduce red light running incidents of the vehicles or not and detecting the vehicles which wait a green light on the intersection or drive to the intersection from the video images to evaluate whether the time distribution of red and green lights is reasonable and the traffic signal control is efficient or not. Information acquired by the monitoring system can not only be used for an intersection machine in the field of the intersection, for example, a signal light is started to flash in yellow when the traffic signal is monitored to be abnormal, but also be remotely uploaded to a traffic management center through a network.

Description

technical field [0001] The invention relates to the technical fields of video image processing and traffic engineering, in particular to a traffic signal safety and efficiency monitoring system at an intersection, which uses video means to monitor the running conditions of traffic lights on site. Background technique [0002] Intersection traffic signal control machine (hereinafter referred to as intersection machine) plays an important role in modern cities. The intersection machine controls the on and off of traffic lights, instructs vehicles to pass or stop, and coordinates the order of traffic and people in different directions. With the continuous increase of urban population and vehicles, people have higher and higher requirements for traffic lights, which are mainly reflected in two aspects of safety and efficiency. "Safety" means that traffic lights are never allowed to have abnormal conditions that may cause major traffic accidents, especially when the green light ...

AI Technical Summary

Problems solved by technology

If the signal light circuit is subjected to electromagnetic interference from nearby high-voltage lines to generate voltage and current, although the interference voltage is not enough to light the signal light, but because there is a certain voltage and current in the signal light circuit, the fault detection board may mistakenly identify the off state of the signal light as a bright state , so that it is wrongly judged that a green light conflict has occurred and it is downgraded to a yellow flashing signal light

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