Constant Pressure Water Supply Monitoring And Control System For Automotive Engine Laboratory

According to the requirement of water supply in automobile engine laboratory ofCHINA FAW GROUP CORPORATION a set of automatic system of constant pressurewater supply by using variable frequency and remote monitoring and controlling, whichis composed of PLC, transducer, pressure sensor, pumps and electro-motors, computerand modem is designed to that end. This set of system has the functions like automaticconstant pressure operation by using variable frequency, automatic work frequencyoperation, and the function of long-range control by hand and the on-the-spot control byhand etc. The system has solved efficiently the problem existing in the traditional way ofwater supply, which has various supplementary functions to strengthen the reliability.The system has an organic combination with computer and promotes the systematicoverall performance.In the light of that the excise mathematical model of water supply system is dificultto find and no more request for the control precision,this paper put forwards a Fuzzy-PIDdesign for water supply under constant pressure. And also simulate the system withMatlab, the simulation result shows that this compound control system has moresignificant robustness. Moreover, the system used Visual C++ to design the monitorsystem. By researching the communication agreement between the computer and PLC,this paper has finished setting up the comrrtunication between upper and lower computer,and also has developed computer monitoring program to realize the remote monitoringand fault reporting for water supply system through modem by PSTN.