Signal control system based on PLC

Abstract

The invention relates to the technical field of signal control, and discloses a PLC-based signal control system, which comprises an external vehicle sensing system, a central control system for signal adjustment and presetting, and a signal control system for signal output, the vehicle sensing system, the central control system and the signal control system are connected through network signals; vehicle detection and traffic signal adjustment are performed on an intersection through the vehicle sensing system and the central control system, and the phase budgeting module judges whether to prolong the green light interval time length of a specific phase or shorten the phase interval without traffic requirements according to vehicle data collected by the dynamic detection module, so that the purposes of ensuring the traffic stability and improving the traffic safety are achieved. The vehicle release in a period of time is maximized, the parking frequency is ensured to be minimum, the trouble of commanding and adjusting by traffic commanders is avoided, the waste of human resources is avoided, the operation efficiency is improved, and the effect of automatically adjusting the traffic signal lamp is achieved.

Description

technical field [0001] The invention relates to the technical field of signal control, in particular to a PLC-based signal control system. Background technique [0002] Traffic signal indicators are the guarantee for stable and safe operation of road traffic. In places where the traffic flow is not dense, the manual preset of the signal control system can basically meet the needs of traffic instructions. However, in cities with a large traffic flow In the center, the traffic flow is huge, and the vertical and horizontal traffic flow varies greatly. In order to ensure the stability of the traffic, the maximum number of vehicles will be released within a certain period of time, and the number of parking times will be minimized. Usually, multiple traffic command personnel are required to manually divert traffic and workers take over to adjust the signal control system, which not only wastes a lot of human resources, but also has low operating efficiency. Contents of the inven...

AI Technical Summary

Problems solved by technology

Usually, multiple traffic directors are required to manually divert traffic and workers take over to adjust the signal control system, which not only wastes a lot of human resources, but also has low operating efficiency.

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