The Research Of Intellectual Control Meter Based On CAN

During the industry production, the temperature flow and the rotate speed are usually the most important controlled arguments. Because their control principles are different, the corresponding control meters also have big difference. Nowadays, as the development of the electronics, the digital controllers gradually replace the analog controllers, using the single chip microprocessor in to the industry equipments are becoming more and more universal, by programming on the single chip microprocessor, we can easily achieve some difficult control arithmetic, and the results are excellent. The traditional control arithmetic usually use the PID controls, it was widely used because of its simple control structure and easily adjusted arguments, but for some big late and nonlinear objects, its dynamic responds usually can not be satisfied. On these days, lots of kind of intellect control arithmetic are found out, using these intellect control arithmetic into the controllers can get a good control of the objects. The traditional equipments are usually used by single, the probing and the controlling did not become a system, as the development of the field bus, it is a trend to put the industry equipments into a net and become intellectual. In allusion to these states, this paper of the Research of Intellectual Control Meter Based on CAN field bus gives a new point, using the controller constructed by single chip microprocessor, combined by different peripheral hardware circuits, adopting the intellect control arithmetic, respectively achieve the control of the temperature flow and the rotate speed, and compared the simulation results, through the CAN field bus, we connect these equipment, plus the PC, it becomes a equipments network, and we can see the equipments' state in the control room.This paper firstly analyze the field bus' protocol, the stability and the universality, then present the control system based on CAN. This system use the PC and the equipments based on CAN to be the structure. The connection between the host and the slave intellectual meters is the CAN field bus net communication block SJA1000, and the meters as slave are placed on the industry spot. The control meter based on CAN field bus is using the single chip microprocessor 89C51 and the special chip SJA1000 to design, achieves the functions of data collection, display, keyboard input and overstep alarm, and can be conveniently connected with the field bus network with designed CAN interface.As to different objects, after analyze the control characters in detail, we design several different hardware blocks with several different sensors and executors, with the single chip microprocessor, it turns to be a good project, and can well achieve the control of the temperature flow and the rotate speed.As to the intellect control arithmetic, at the foundation of the exist control method, we studied the self-adjust of the PID arguments, combining the advantages of two-dimensional fuzzy controller and fuzzy self-adapted PID controller, an improving control algorithm called Fuzzy-PID classification control method is presented. Studies on fuzzy controller, fuzzy self-adapted PID controller and Fuzzy-PID classification control method are involved. The simulation on the model of temperature control are finished and the result shows good effects of Fuzzy-PID classification control method. Both static and dynamic performance can meet, and it can change its parameters as the model changes.In this paper, there is the control system's feasibility report, the whole control project, hardware and software design, part of the circuit graphs and the block' software design graph are included, the program is at the end. At last the control system's real time simulation is provided, The results show that the parts work all right and achieve scheduled functions.