Design Of An Online Water Measure System Of Distributed Crude Oil Tanks

Water content ratio in crude oil is an important parameter of oil industry in the process of mining, smelting and transporting, so the precision of water content of the oil is significant for confirming quality of the oil and definite interest of both sides of trade.Firstly, this thesis gathers on the essential theory and technology of metering device and on-line examination of crude oil tank, designs the overall scheme of the system and selects the Micro Controller Unit(MCU) and its periphery component; Next the thesis constructs hardware circuit of the lower position machine whose core is AVR(a kind of MCU manufactured by ATMEL Company) MCU ATMega16L.The circuit includes the MCU smallest system, the RS-485 serial communication, the control circuit of motor and the A/D conversion etc. In addition, the thesis considers anti-jamming, so in the design process of the system, kinds of anti-jamming components are attached. The system software is made up of MCU software and PC software. MCU software includes serial communication, data acquisition etc. The PC software mainly includes the serial communication and the data processing. Then the thesis carries on the detailed design in view of various functions module, conducts more thorough research on the MCU software and proposes two kinds of realizable system function plan: programming into the MCU directly and programming into the MCU indirectly by real-time operating system. To the PC software, the thesis uses the Delphi attached the third-part components to design the RS-485 serial communication and the real time display surface. Finally, the thesis summarizes the achievement of the design and proposes the direction of the further work.