| With the development of science and technology, the electrical control technology is have made new demands and rapid development for production technology. At present,the inverter and the application of universal programmable controller, PLC'sFunction is very powerful, and easy to use, high reliability, not only for logic control, analogclosed-loop control, intelligent digital control, data acquisition control, communications networking and distributed control system and other aspects of control systems have been widely used. And by changing the voltage and current signals to control the motor or frequency converter in the field of industrial electric drag has also been widely used. As a man-machine interface configuration software, PLCcan control theproduction of ingredients.In this thesis, brick, cement production and otherindustries precise ingredients of automatic problem, a PLC-based control algorithm using fuzzy adaptive PID control method, the first device for continuous measurement study to known electronic belt weighing principle and the principle of flow control; then introduces the PLC (programmable process controller) of the basic components, working principle, the main features. Furthermore, the internal structure of the drive more in-depth study to compare several types of motor speed, in-depth study of the principles and advantages of inverter. Paper on the above analysis of device in automatic dosing system after the associated application to determine the overall scheme of the system, control strategies and hardware configuration and software implementation. This also applied to the programmable controller EC20, Mitsubishi inverter and configurationsoftware is introduced. |
