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Water telemetry system is the application of telemetry , communications , computer technology, and real-time collection of data such as rainfall , the water level of the river basin , the submission and processing of information system . Remote Terminal Unit (RTU) completed the automatic collection of hydrological data , storage , and transfer the data to the central station of the system host , the host receives the telemetry station data and analysis to make the right decisions , and to provide timely and accurate water conservancy department intelligence information , to improve the management level of the water conservancy department . The design of this project based RTU line-powered , direct telephone line powered modem and savings of energy supply through the power connector next bit machine , real-time collection of hydrological data such as rainfall , water level , and collected solid-state storage and transfer data , annual automatic record Hydrology data . This paper first analyzes the research status of water telemetry system at home and abroad , brief introduction to networking mode, working system, main functions and technical indicators , and line-powered RTU design ideas . Expand the design is divided into two parts , hardware design , including the design of a microprocessor ATmega169 and modem a CMX868 selection , data memory expansion , human-machine interfaces , data communication module , power supply and data acquisition hardware module , software design part of the major functional blocks of the hardware design of work processes and procedures , and finally on the power consumption of the storage characteristics and reliability of the entire telemetry system performance analysis and work summary and outlook .
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