Backstage Logic Design Of Railway Signal Basic Experiment System

Basic railway signal experiment is a compulsory course for rail transit signal and control major,the main is to guide students mastering basic signal infrastructure,such as signal,switch machines,relays,track circuits,transponders,etc.The most important part of the experiment is the relay circuit experiment.Because of the variety of relay,the function and structure are diferent,so school laboratory configuration is not complete,causing part of the experiment can not be carried out.In order to make the experiment can be carried out,the design of the background logic of railway signal basic experiment system seems to be very important.Since the relay circuit(including 6502)is generally difficult to achieve,therefore,to use software to design.The design of the circuit includes signal lighting circuit,switch machine circuit,turnout control circuit,iso external locking turnout conversion circuit,signal alarm circuit,broken wire alarm circuit and other circuits.Experiment with the user interface to achieve the simulation of the relay logically.This paper analyzes the relay logic circuits that are used to complete the system,and make the relay logic circuit processing to culture,so that each relay logic circui can be stored in the background,and work with man-machine interface.The main working mode of the system is the front man-machine interface simulates the packets of circuit,then the data packets are sent to the server through the client.The server receives the data packet,and matches with the backgroud database systems,the server then output the corresponding result that reflects the state of the relay circuit connection.Finally,the function of the system has been demonstrated,and raised the inadequacies of the system,then proposed improvements.