Traffic signal control system

Abstract

The invention discloses a traffic signal control system. A temperature sensor and a humidity sensor are respectively connected to an AD collection module, and the AD collection module is connected with a signal input end of a PLC. An illumination sensor is connected with an optical coupler isolation module, and the optical coupler isolation module is connected with the signal input end of the PLC. A serial port of the PLC is connected with a GSM900A emitting end, and a GSM900A receiving end receives an emission signal of the GSM900A emitting end. The GSM900A emitting end is connected with a PC. The PC is connected with the PLC in an RS485 communication mode, and the PLC is connected with traffic lights. Cameras are installed in two directions above an intersection, and carries out the photographing of the vehicles at the intersection during red lights. A liquid crystal speed-limiting indication board is connected with the PLC, and the PLC receives a limit speed outputted by the PC, and displays the limit speed on the liquid crystal speed-limiting indication board.

Description

technical field [0001] The invention belongs to the field of intelligent traffic, and relates to a traffic intelligent control system using multiple signal cooperative processing and wireless transmission technologies. Background technique [0002] With the development of society and the progress of the times, motor vehicles have entered thousands of households. At the same time, it also brought great pressure to the traffic problem. Although traffic lights are arranged at crossroads, this can solve the problem of traffic flow orientation. But sometimes the traffic in one direction of the intersection is very congested, and there is basically no traffic in the other direction. This is because the unreasonable signal lights cause traffic jams. And traffic accidents occur from time to time, although many places are provided with speed limit warning signs, due to factors such as weather, day and night, light, the constant speed limit signs do not have the effect of safe spee...

AI Technical Summary

Problems solved by technology

But sometimes the traffic in one direction of the intersection is very congested, and there is almost no traffic in the other direction.

This is because traffic jams are caused by unreasonable signal lights

Moreover, traffic accidents happen from time to time. Although many places have speed limit warning signs, due to factors such as weather, seasons, day and night, and light, the speed limit signs that have remained unchanged cannot achieve a safe speed limit effect.

Some drivers think that the speed limit is a safe speed, but they don't know that the safe speed is affected by many factors

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