Research And Design Automatic Train Identification System

With the development of railway transport informatization,the Railway Department has been building the system of TMIS, And ATIS is a key part of TMIS,which providing the fundamental data to tracking the situation of the train and been used management of the Railway Department.Hardware is indispensable to ATIS. The hardware is mainly constituded by the electronic tag and the AEI. This paper gives the design of the AEI system,which includes schematic design of RFID reader,megenitic steel position sensor,communication of RS485 bus and lightning protection. The paper discusses RFID technology of 915MHz and give the design of the reader associated the protocol ISO/TEC18000-6 Type B. ATmega64 is designed as the control core of the reader. TR1000 and RF2132 are used for the RF module circuit.Considering there is not a single Rail in practical services and the reader in most station there are few pairs sends the train information to the upper PC, the paper devotes a 4-path-RS485 to 1-path-RS232 protocol converter, which implements the communications between the Rails and the upper PC.The work also gives the design of megenitic steel position sensor, and discusses the system's lightning protection.