Research Of General Monitoring And Controlling System Based On μC/OS_Ⅱ For Electric Vehicle

In recent years, with the strong support of countries on new energy technologies, the electric vehicles has been developed rapidly. As electric vehicle battery is one of the core system,non-car charging statons and fast charging poles became indispensable facilities. On the other hand, further development of the Internet of things technology has promoted the intellectualization of people’s life by providing the connection of non-car charging stations and electric vehicles. While by far, most vehicle monitoring systems are limited to the monitoring of the vehicle itself. This dissertation focuses on the above issues and develops a general monitoring system which monitors and tests the performing status figures of the power battery and the charger in real-time, thus to enhance their security and reliability, and unifies the three monitoring data to facilitate and optimize the dispatch of electric automobile and the charging poles position.Firstly, according to the request of the design, the monitoring system will be divided into two parts--monitor terminal and monitor center, and individual design and analysis were carried out separately. Monitoring terminal can be installed in different objects (power battery, battery charger and so on), by gathering monitoring data from object CAN-bus and transmitting to the monitoring center though GPRS network, the monitoring center may examine the performance data of each monitoring object through Web remotely, and is able to issue the control commands to each monitoring object and perform data analysis of the monitored object and so on.Secondly, this dissertation studied and analyzed the structure and working theory of the monitoring terminal and monitoring center, illustrated the independent software and hardware structure and design. The monitor terminal was mainly consisted of the connection module and the data storage module. The monitor terminal adopted the popular Cortex-M3core STM32processor chip, combined with NAND Flash storage and ZLG ZWG-23A GPRS module. On the basis of open source embedded real-time operating system μC/OS_Ⅱ. through transplantation and configuration, which enabled monitoring terminal to collect monitoring data of objects, the ability to store and send the acquired data via GPRS to the monitoring center. The control center based on B/S structure was mainly responsible for receiving from the monitor terminal and completing data analysis and processing data packet of GPRS transmission, and preserving database (MySQL). The users may visit the examination data, or carry out other statistical analyses to the data through Web.Finally, through tests under real operating conditions, this monitoring system was proved to be reliable and applicable to electric vehicles and other various monitored objects. With its low cost and high reliability, this monitoring system provided the feasibility of the large-scale demonstration as well as unification and regulation of relative platforms and various related equipment.