Traffic light control system

Abstract

The invention relates to a traffic light control system. A dial switch is used for setting a working mode of each light in each direction, and transmitting the set data to a PLC (Programmable Logic Controller); after the PLC preprocess the set data, the PLC outputs a control signal to control the traffic lights in the east-west direction and the north-south direction; meanwhile, status indication time is displayed on seven-segment digital tube through an external decoding chip; an external button box is used as a forced signal to control input, so that the states of the traffic lights in the east-west direction and the north-south direction can be forced under special demands; direct current output by a solar photovoltaic array passes through a voltage-stabilizing module and then is supplied for the system; a storage battery pack is used as a backup power supply of the system.

Description

Technical field [0001] The patent of the present invention is a traffic light control system, which is applied to the traffic light control at the intersection. Background technique [0002] With the development of various means of transportation and the needs of traffic command, traffic lights play an important role in it. It is difficult for people to imagine what our urban traffic conditions would be like if there were no traffic lights on the road. With the continuous development of traffic lights, people have higher and higher requirements for the automation and intelligence of traffic lights. Most of the current traffic lights use traditional relay circuits or simple digital chips, which are not intelligent enough in the control process, and the stability is not high enough, and The change of control mode is also complicated. Designing a traffic light control system with a high degree of automation plays an important role in improving the automation degree of traffic l...

AI Technical Summary

Problems solved by technology

[0002] With the development of various means of transportation and the needs of traffic command, traffic lights play an important role in it. It is hard for people to imagine what our urban traffic conditions will be like if there are no traffic lights on the road. With the continuous development, people have higher and higher requirements for the automation and intelligence of traffic lights. Most of the current traffic lights use traditional relay circuits or simple digital chips, which are not intelligent enough in the control process, and the stability is not high enough, and The change of the control mode is also relatively complicated. Designing a traffic light control system with a high degree of automation plays an important role in improving the automation of traffic light control.

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