Design Of On-line Monitoring System For Circuit Breaker In Metro Traction Substation Based On ARM

In recent years,the embedded technology develops fast,embedded system applications increasingly broad. Embedded systems are gradually moved into all aspects of the industry production.In the industrial controlling,the function of the traditional detection device relatively single,visualization,and limited scalability. With the constantly development of Linux system,a new generation of monitoring ststem using ARM chip carrier and Linux systems software platform replaces the traditional detection device systems gradually.Breakers of the metro traction substation have frequent mechanical and electrical actions,easying to failure and maintenance complicated,to solve these problems,this paper designed on-line monitoring system of circuit breaker based ARM,it can reflect the operating conditions of breakers real-time and fast,enhance the power supply system in the subway safety and reliability.This paper,based on S3C2440A master contrller with ARM kernel which is provided by Samsung,designs and researches a monitoring system.The system using Linux operating system, designes user interface by the embedded graphical user interface GUI programming tools QtE,to collect and initial process the parameters of breaker.The monitoring system is powerful,extensions stongly,manageable,real-time.This study complete the design of the hardware and the Linux operating system platform of the monitoring system,as well as the QtE application.The hardware design includes:data acquisition circuit,RS-485 and Ethernet communication interface,LCD liquid crystal display design.The Linux operating system platform includes: transplantation of Linux,design of driver,design of QtE application.The using of the embedded graphical user interface on the LCD makes the monitoring easy and intuitive.