Pressure Data Acquisition And Control System Based On ARM

With the rapid development of science and technology, data acquisition technology has developed rapidly, there is more and more control manners using the data collected and it has also been used more and more in the project. Traditional data acquisition technology focused on the use of SCM as well as PLC, because the precision and speed of collection are not high enough, it can not meet people's needs for the development of the electronics industry. The introduction of embedded technology can solve the above problem. Embedded system is one of the most popular preface technologies today. The use of embedded technology into data acquisition and control system can greatly improve real-time and flexibility of the system to meet the increasing demand for measurement. Thereby data acquisition technology based on embedded hardware platform and software platform has become the mainstream of contemporary society data acquisition technology in the electronics industry. Taking into account the advantages of embedded data acquisition technology and its good development prospects, the research of this subject is based on the embedded data acquisition.This subject on the basis of the research of the basic principle of embedded real-time operating system, ARM processor and data acquisition technology have completed the design of pressure data acquisition and control system based on ARM processor and embedded real-time operating system. The system used in conjunction with sensors in engineering can achieve the acquisition of a variety of commonly used data such as temperature, liquid level, pressure and flow. The main research content of this paper is that the turbine is running, because of the friction and high temperature steam heat conduction in the operation, steam turbine will be local overheating, and lubricants will be failure which make the output torque do not meet the requirements and explosion-watt, or even an explosion. In order to protect the safe and stable operation of turbine, there is a higher demand for the turbine cooling water circulation system. Ensure the normal operation of condensate loop, the accurate control of condensate loop electric ball valve and the pressure data acquisition of the water loop are extremely important. In this paper, ARM is the control core to collect pressure data of the condensed water cycle and use digital filters to deal with the data which make the data more accurate and reliable.By using the data obtained and PID control to control valve, the aim to control the pressure of condensate loop exactly is achieved, thus the safe and stable operation of steam turbine is ensured.