RTU Based On Nios Ⅱ

The current domestic small and medium-sized reservoirs disrepair, the construction of small and medium-sized rivers ability is insufficient, resulting in a large rainfall regime, the drought occurs, often accompanied by large natural disasters, so the research of Chinese water conservation information construction and implement is becoming more and more important, therefore, this article puts forward the design and implementation of the RTU based on Nios Ⅱ.RTU English full name is Remote Terminal Unit, called the Chinese Remote intelligent measurement and control terminal, water resources is a kind of Remote measurement and control Unit device, forms the core of data acquisition and monitoring system device, which can realize the scene signal acquisition and control of the field devices, and the communication with the remote control center.RTU based on Nios Ⅱ, the use of Altera company provide the SOPC Builder tool to embed the Nios Ⅱ CPU soft core Cyclone Ⅱ series FPGA, is a kind of large capacity, multi-channel, low power consumption, high reliable and intelligent digital remote intelligent measurement and control terminal, can realize the monitoring of water conservancy information monitoring, remote control, data storage, power management, and other functions, and can ensure the real-time data and information, and can communicate with central station with GPRS/CDMA network, the data from the terminal to water resource management platform, facilitate management platform monitoring and control the terminal。In this paper, terminal can realize water, water level, rainfall and camera sensor access and communication, Power supply mode, DTU limit state, the door body status information related to judgment, Choose the LCD liquid crystal display, cooperate with keystrokes in working way and working parameter setting, Having the good power management module, which can realize the 12V mains and battery undisturbed switching power supply, Can use SD card to store the historical data of not less than 90 days, Can regularly report the terminal real-time data, random overrun, super threshold intelligent way to work. Terminal has the characteristics of easy scalability and maintainability, has certain practical value and popularization meaning.