The Research And Implementation Of Some Key Techniques In Door Controlling And Ticket Validating Systems

This text introduced the principles and implementation method of bar code, radio frequency IC and Lattice LCD , and based on those above, it discussed the door controlling and ticket validating systems which adopt the technology of no power spiral arm. In this system, there are two subsystems; the hypogynous machine system and the superior computer system. The superior computer system is an ordinary PC which discerns the validation of tickets hard card and IC card . It also realizes such functions as uploading data downloading data recovering data and displaying data. The hypogynous machine has a lot of AT89C52 singlechips, including three pieces of modules: information-input module control-display module and communication module. Information-input module reads the initial data from tickets hard cards and IC card , and sends the data to the communication module. Control-display module is responsible for controlling the rotation of no power spiral arm and for displaying the information which comes from the communication module on the lattice LCD. Communication module is used to coordinate the movements of information-input module control-display module and the superior computer system. On the one hand, it receives messages from information-input module, and then sends them to the superior computer after putting them in order; On the other hand, it also receives result from the superior computer, and passes it to information-input module and control-display module. When it can not communicate with the superior computer , the communication module can finish discerning the validation of tickets hard cards and IC cards independently, and store the results; Once it can communicate with the superior computer again, communication module resumes the data in time. The exchange of information between the superior computer and the communication module is through RS232 interface. The whole system has already been running for more than one year at the scene, and the performance in all respects is very ideal. The system has achieved the anticipated goal, and has met the user's demands satisfactorily.