Research On Intelligent Flow Totalizer

In recent years, people have paid much more attention to the accuracy of flow measurement as technology progresses.The intelligent flow totalizer system in this design is combined with the spindle flowmeter, the embedded system techniques and serial communication techniques. Spindle flowmeter, a new type of differential pressure flowmeter, is used as the sensor of flow measurement. And aiming for a small and intelligent design, we use the MCU named SST89E564RD as the main controller, the LEDs and the keyboard as the user interface. During the period of measurement, the transduction circuits transform the differential pressures, the absolute pressures and the temperatures received by the sensors into the voltage signals, and then, the voltage signals are transformed into digital signals by the A/D convertor. The MCU processes these digital signals and calculates the cumulation of the flow. Finally the totalizers contact with the PC by RS-485 bus to form a distributed measuring network.The spindle flowmeter and the especially designed totalizer highly improve the precision of measurement, and the measuring system made up of them is very easy to use.