A project about water injection control system for oil fields which consists of the aboveground part and the underground part is designed

the aboveground part is based on controller STM32and the underground part is based on ADuC832.The pressure

flow and temperature of well are monitored and then uploaded to STM32

so the expected flow value can be caculated.By using PID control algroithm

the value opening of stopper can be obtained according to the difference of the expected value and the pre-set value and trainsmitted to the underground instrument

so water injection can be regulated and the intelligent water injection in oil field can be realized.By transplanting the uC/OS- Ⅱ to STM32

the optional allocation of system resources through its task scheduling function can be realized.Experiment verifies the system is stable

relible and can be widely used.