Development Of The Tensile Testing Machine Data Acquisition And Processing System

At present experiment on the test the pull and press intensity test to rubber is usually curried out on the stretch experiment machine. Most of the testing systems for homemade stretch experiment machines are based on single chip and others are based on PC systems. In this paper, a system about material test machine for testing, controlling and data processing is exploited based on PC. In the beginning, the working principle, testing and data processing system of PDL micro-control material test machine is introduced; then more attention is paid to the hardware system which is composed of high precision raster linear displacement sensor, high precision force sensor, the digital displaying sets, the interface equipments and the controlling circuits etc to perform the data collection and ensure the testing precision of the whole system. In view of the testing software's visualization and operability, an advancedsoftware-----LabVIEW (Laboratory Visual Instrument Engineering Workbench) isadopted to exploit this system. The panel is made up of display section and setting section. The measurement results can be display by means of waveform chart and XY graph. This paper is discussed with emphasis on the diagram structure, skill at the graphical programming with language G and application of dynamic link library. A method of analysis and processing the sampling data is also presented. It adopts interpolation and filter to get rid of the burrs, and Least Square method to fit the curve. The noise in the sampling signal is remved by means of fliter or smoothing. Hereby MATLAB program for taking out noise and abnormal point is compiled so that the matter on original analysis and processing is settled down successfully. In the end the test analyzed results are presented in the paper.