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The RTU Design of Hydrologic Data Acquisition

Author: SongTao
Tutor: ShiWei
School: Taiyuan University of Technology
Course: Circuits and Systems
Keywords: RTU Microcontrollers GPRS Power Management Data acquisition
CLC: TP399-C3
Type: Master's thesis
Year: 2010
Downloads: 117
Quote: 2
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Abstract


China is a country of a flood and drought prone to natural disasters, in order to reduce the loss of flood and drought disasters, the need to make accurate forecasts of the water regime, this is a work of great significance. Hydrological information is an important basis for decision-making in forecasting and water resources departments, hydrological automatic monitoring system in order to solve the automation of hydrological information acquisition, processing, construction engineering, and RTU (Remote Terminal Unit) is an important part of the hydrological automatic monitoring system, responsible for collecting sensor data and upload it to the central station, plays a pivotal role assigned upload this article through the the RTU status quo widely used in our analysis, summarize appear products in power consumption, poor stability, versatility To solve these problems, we have designed a new type of RTU. The papers start RTU functional requirements proposed design principles and RTU function to achieve. And then proceed to the overall analysis and design, detailed design of the hardware structure of RTU. The design AT89S8252 microcontroller as the core, extended four serial ports to accommodate the data acquisition and communications, as well as the need for expansion. Paper a modular approach to design a data acquisition circuit, communication module and power management circuitry. Data acquisition module involves digital switch, RS-485 serial input and AD conversion; communication module design FM radio module, and the detailed design of the hardware circuit of GPRS module; unique power management module designed the unattended power circuit and by control power supply circuit in two parts. Build a good hardware circuit based on the paper design software main program as well as some important function module flowchart. The main features of the design are two aspects of the power management part and the communication part. Unique power management mode to achieve low power consumption of the system, the wide coverage of the GPRS-based communication module based on the geographical to radio at the same time as a backup, and left an expansion port, in order to adapt to the specific situation reflects the design versatility, these features make the the RTU very suitable for the application of Automatic Hydrological Forecast System. Details first paper on the structural arrangements of the automatic hydrological forecasting system composition, structure, and the main content of this article RTU, discussed the functional requirements of the system, and the principles of design and make the overall design. After the detailed design of the system hardware circuit is the core of the article, and then design the software process. The final design analysis and summary, and job outlook.

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