The Design And Implementation Of An Ethernet-based Multitask Measure And Control

The thesis introduces the idea, design and application of an ethernet-based measurement and control node that can be used as on-site data acquisition/control unit to join an ethernet-based distributed measurement/control system.The hardware is designed around ADμC834 and RTL8019AS, along with the design of peripheral circuits such as analog/digital I/Os.With the embeddedμC/OS-Ⅱas operating system and uIP as Ethernet protocol stack, the node posseses the capability of multitasking and Ethernet communication.The thesis also presents an application of such nodes in a furnace temperature control system. Besides the circuits design of sensor's interfaces and the thyristor drivers, the design puts the stress on an adaptive FUZZY-PID algorithm to overcome the drawbacks of common PID controller while being used in systems with big time delay.