Research on the Structural Modeling of Intelligent Traffic Signal Relay Control Circuits

Addressing the challenges of analyzing complex relay circuit structures in intelligent transportation systems and establishing the interdependent relationships between logical and electrical characteristics, this paper proposes a modeling method for signal relay control circuit structures. First, the circuit is formally described; then, the concept of short paths is introduced to denote local circuits. On this basis, graph theory is used to abstract the circuit structure into a hexuple. The circuit structure is further searched and simplified, and a screening algorithm is proposed to separate it into a logical structure model and an electrical structure model. Finally, the circuit model is being divided into a set of short paths and a set of nodes, with their coupling relationships explained. This structural model is applied in relay circuit logic function simulation analysis software, and using the control circuit of a railway switch machine room as an example for logic function simulation, to verify the correctness of the method. This provides new insights and methods for research and practice in the field of intelligent transportation engineering.