Road traffic signal countdown displaying device

Abstract

The invention provides a road traffic signal countdown displaying device which is arranged in a junction and connected with traffic lights which are controlled by traffic signals; the road traffic signal countdown displaying device comprises a light signal input modules for outputting a red or green light high-voltage level signal, an input interface module for converting the high-voltage level signal into a low-voltage level signal, a microprocessor module for determining the type of the low-voltage level signal and detecting the signals of the type in two continuous periods and outputting a countdown signal by using one period of the low-voltage level signal of the type as the countdown period since the values are in a line under the detection, an output interface module for outputting seven-segment code digital signals, and a countdown displaying module for displaying the countdown to the seven-segment code digital signals. With the adoption of the road traffic signal countdown displaying device, the functions of urban road traffic signal self-adaptive control system can be realized; and the road traffic signal countdown displaying device can display the counting display of the traffic signals along with the continuous change of traffic volume and saturation level.

Description

technical field [0001] The invention relates to an advanced traffic management and control technology of intelligent traffic, in particular to a road traffic signal countdown display device required by the intelligent traffic signal control technology. Background technique [0002] The rapid development of my country's economic construction, urban traffic is inseparable from the construction of urban road traffic facilities, road traffic is the first, effective management of urban road traffic is an important link in alleviating traffic congestion and the key to solving urban traffic problems, no matter It is the policy authorities, experts and scholars in the industry, or people from all walks of life who have conducted analysis and research on urban traffic congestion and smooth flow. Whether the urban road traffic network system can provide high-quality services for traffic is related to the characteristics of the roads in the road network system, and whether a road is smo...

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a road traffic signal countdown display device to meet the functions of the urban road traffic signal adaptive control system, and then solve the problem that existing traffic lights cannot perform intelligent traffic signal countdowns. Display, can not change continuously with the traffic flow and saturation, but real-time display of the count display of signal lights

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