The Design Of Ground Wire Monitoring System Based On GSM Network

The security of service is a focal point in the mind of the worker and manager of power system. The periodical inspection is the important tache in the routine work of power system and using ground wire is the important method to ensure the security of inspection. It is a desiderate-solved problem to improve the using reliability of the ground wire. In order to realize the real-time monitor about ground wire, this paper present a ground wire monitoring system based on GSM (Global System for Mobile Communication) wireless communication. This paper first presents the system design as a whole, then presents the hardware and software design of system, at last presents some discussions and investigation in applying field.In this system GSM network is a medium for transmitting the remote signal, it presents detailed explanation of GSM network's system structure and emphasizes the communication principle that is important for the task. The mode of transmitting data is most SMS (Short Message Service). PDU (Protocol Data Unit) mode is used during transmitting SMS. It presents encoding and decoding of SMS PDU mode. Transmitting and receiving SMS is realized by using AT command. The familiar AT command and using method are presented in this paper.In the design of system hardware, the TC35i and microchip PIC16F873A and peripheral circuit are presented. Hardware of system includes two parts: the monitoring center and the remote monitoring terminal. The monitoring center contains a computer and a LT8010 communication module of GSM. The computer and LT 8010 are joined by RS232. It consists of the TC35i communication module of GSM and microchip PIC16F873A and peripheral circuit in the remote monitoring terminal hardware design, including clock circuit, power supply circuit and level translate circuit of microchip PIC16F873A and the SIM card circuit, LED display circuit and starting up circuit of TC35i.It includes the monitoring center software and the remote monitoring terminal software in the design of system software. The monitoring center software is designed with Borland C++ Builder 6.0. It presents method of serial communication control MSComm, finishes the interface design and the function of receiving and transmitting and saving data. The remote monitoring terminal software is designed with MPLAB integration developing environment that Microchip designed for PIC16F87x single chip and assemble language debugger. It includes single chip initialization and main program and interrupt of gathering signal and SMS receiving and transmitting program through the serial port.At the last, experiment is carried out on accomplishing the basis system design and resolvent is brought forward which against defect and deficiency exists in system.