一种新型嵌入式网络信号机研究与设计

交通信号机是智能交通系统的基础之一,为了满足信号机的网络化和智能化的要求,研究并提出了一种新型的嵌入式网络信号机,该信号机的硬件结构采用ARM和CPLD,以触摸屏为基础采用QT/Embedded设计了人性化的人机接口,信号机支持多种通信接口,其协议采用XML予以定义;为了避免绿冲突,以两级模式进行冲突判断;单点模糊控制机制的设计能够适应动态的交通流状况,有效提高交叉口的通行能力;连接交通仿真软件,模拟实际路口,实验显示该信号机工作稳定,性能优越。

Study and Design of Embedded Network Traffic Signal Controller

Traffic signal controller is one of the main foundations for Intelligent Traffic System.In order to meet intellectualization and network requirements,a novel embedded network signal controller is investigated.ARM and CPLD are used to design hardware structure of signal controller,and humanized user interface is developed using QT/Embedded based on touch screen.Multiple communication interfaces are supported and the communication protocol is defined by XML.The mode of two level conflict check is introduced to avoid green conflict.Single point fuzzy control module is developed to deal with dynamic traffic flow,so as to increase traffic capacity in intersection.Connecting to traffic simulation software that simulates the actual intersection,experiments show that traffic signal controller works stably,and has excellent performance.