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在传统信号控制配时概念模型的基础上探讨了一种基于优先图(PG:precedence graph)的信号控制交叉口信号配时链模型,并通过符号化的优先图表示了信号配时行为,形成了配时链行为图。文章对配时链模型的描述提供了一种信号配时相位阶段间隔过渡分析的可扩展结构框架,是一种统一描述信号机软件开发、逻辑设计和现场操作设置的方法机制,便于交通信号机实现一些新的控制需求和设计新的控制逻辑。最后,以普通的T型信号交叉口为例绘制了配时链图模型(TCPGM)来说明该模型对信号机控制逻辑的适应性,解决了传统配时图对信号控制内部逻辑描述的不足。
Based on the conceptual model of traditional signal control timing, a timing control model of signal control intersection based on the precedence graph (PG) is discussed, and the signal timing behavior is represented by the symbolized priority graph to form With time chain behavior map. The article provides an extensible structure framework for the analysis of time-stochastic chain model with phase transition of signal timing and phase, which is a unified method of describing software development, logic design and field operation of signal generator, which is convenient for traffic signal generator Achieve some new control needs and design new control logic. Finally, the TGA model is constructed to illustrate the adaptability of the model to the signal control logic and to solve the shortcomings of the traditional timing diagram on the description of the internal logic of signal control.