Design And Realization Of GPS Vehicle Terminal Based On Wireless Trunking Communication System

Wireless trunking communication system is a dedicated scheduling command system. In this paper a design scheme of remote Vehicle Terminal is presented against the pratical needs of the current scheduling monitoring system of enterprise railway scheduling,which makes use of the wireless trunking communication system and GPS technology. In this design,collection from GPS receiver carry out through the wireless trunking communication systems,reports these data to the remote surveillant. These extend the system's applied scope and generality.The wireless trunking communication system Data Terminal Equipment of the Teledata-Collection is based on PHILIPS LPC2138 microcotroller which has a 32 bit ARM7TDMI-S kernel. With the larger build-in high speed Flash memory,both MAP27 and the real-time kernelμC/OS-μare embedded in the system applied in wireless trunking communicationg system based on MPT-1327 protocol,and it mainly realized the function of wireless task transfer and tele matic. Some kinds of hardware driver have been relized under this system,which formed the software platform of this system. On the basic platform,Multitask application program had been researched out for the wireless orientation system.The embedded GPS Vehicle Terminal device of the locomotive is the high-speed wireless trunking communication data processing terminal device, whose software and hardware are to be done the proper cutting for adapting the general needs of enterprise's locomotive scheduling monitoring,and it integrates reception, transmitting and GPS orientation funcitions of wireless data into only one device. Against the characters of improved function,lower cost,better expansibility and better environmental adaptability,the system is applied prevalently in the fields of airport,dock, the venue, rescue, transportation, etc.