基于WPD-PSO-ESN的城市交通感应信号控制系统设计

Design of urban traffic sensing signal control system based on WPD-PSO-ESN

摘要:

传统城市交通感应信号控制系统缺少对交通车流量的预测，导致信号控制效果较差。为此，设计基于WPD-PSO-ESN的城市交通感应信号控制系统。在系统硬件设计中，将?PC作为上位机，?PLC作为下位机。使用S7-226型号PLC控制器连接EM221数字输入模块与EM223组合输入/继电器，移除?I/O终端；选择AT89S51型号采集器，将其接收到的指令向S7-226PLC控制器发送数据信息；安装单环自愈RS-485多机通信接收发送器，自动修复单回路。在软件设计中，设计手动、闪光控制模块子程序流程，实现信号控制系统状态检测。建立WPD-PSO-ESN交通流量预测模型，结合PSO算法优化参数，以交通流量预测结果为依据，分析交叉口的通行能力，确定不同信号相位绿灯时间，设计感应信号控制流程。由实验结果可知，该系统车流量共计为310，与交叉口历史平均交通流量统计结果一致，说明系统信号感应较为精准，对实现实时交通控制具有现实意义。

Abstract:

The traditional urban traffic induction signal control system lacks prediction of traffic flow, resulting in poor signal control. Based on the non-linear characteristics of short-term traffic flow, the urban traffic induction signal control system based on WPD-PSO-ESN is designed. In the system hardware design, PC is used as the upper computer, and PLC is used as the lower computer. Use the S7-226 model PLC controller to connect the EM221 digital input module and the EM223 combination input / relay, remove the I / O terminal; select the AT89S51 model collector, send the information it receives to the S7-226 PLC controller; install Single-loop self-healing RS-485 multi-machine communication receiver transmitter, self-repairing single loop. In the software design, the manual and flash control module subprogram flow is designed to realize the state detection of the signal control system. Establish WPD-PSO-ESN traffic flow forecasting model, combine PSO algorithm to optimize parameters, based on traffic flow forecasting results, analyze the capacity of intersections, determine the green time of different signal phases, and design inductive signal control process. It can be seen from the experimental results that the total traffic flow of the system is 310, which is consistent with the historical average traffic flow statistics at the intersection, indicating that the system signal sensing is more accurate and has practical significance for real-time traffic control.