The Application And Research Of The Extrusion Machine Based On LABVIEW In Temperature Control System

The temperature shows the cool or warm of the object and is closely related to the human's life and science research. The temperature exists in all aspects of product process and science research .The temperature measure and control dominates over the production of industry and agriculture and daily life.The temperature of extrusion moulding, especially temperature of the forth material crushed out, is the most important parameter to craftwork in extrusion mongline of tegument forth and tegument insulation. Extrusion temperature and extrusion product quality have a closely relationship. So it has a significant meaning to measure and control of the temperature on extrusion moulding.The thesis brings forward a new design in temperature control system which adopts hypogynous machine as the monitor,RS232 as the serial communication ,and epigenous machine as the centralized management. The system bases on the principal and subordinate bus network of the manage main station that is composed of computers and data measure control model that is composed of the microprocessor, and they are connected by RS232.It connects modern microcomputer measure and control technology with traditional temperature test theory. It adopts a graphic programmable language called LABVIEW and modularization method for design in order to enhance the reliability and stability of the software. The measure and control system carries out the real-time display, analysis, storage and other function of the temperature through collecting and processing temperature data, the management of the database and generating the functions model of the report forms.The display model of real-time waveform in epigenous machine which is equal to a virtual digital scope is coded with LabVIEW language. The system has a mutual graph supervising interface, and it has the advantages of simple operation and high liability and easy maintaining. The software system can perform the following operation :(1)programmed controlling;(2)monitoring the process of test;(3)recording, analyzing and dealing with the data of test, displaying and saving the useful data, furthermore, plotting the test curve;(4)in the process of test, providing the operational information by the console interface.Experiments prove that the measure and control system of temperature based on virtual instrument satisfies all performance index. And the system provides an application project for other testing systems. It can be directly used in engineering.