.5 The Mn Pre-tensile Testing Machine And Control System Design And Research

Pre-stretching test is a important method to eliminate the stress remnant. In order to meet pre-stretching test's special motion state, functional requirement and to save funds, this article design the pre-stretching machine's data acquisition, measurement and control system. The major research contents as follows:First, It introduces the pre-stretching machine's configuration, working principle, and Based on above works, design the hardware of this system. The system adopts the program of data acquisition card and PLC, carry out the data acquisition and control model block function.Second, accomplish the design of the upper computer software. Software design includes the upper computer software design and the PLC software design. The upper computer software design adopts Visual Basic. Including data acquisition, data processing, impulse signal acquisition, communication with PLC, digital quantity output functions. The PLC program design achieves the Pre-stretching machine switching control.Once more, research the data processing algorithm of the system and Anti-interference. Introduce the usual data processing algorithm, and the data processing algorithm of this system. Analyses the interference source and give out corresponding control, it's significant of system's stability.Finally, accomplish a simulated experiment for the system. After the debugging, the program of data acquisition and PLC is reliable and stable; attain the goals and requirements of system design. Contrast hydraulic pressure testing machine, it has stronger data processing function, better compatibility. The data acquisition system achieved by upper computer software can be used in other data acquisition systems, which have fine extending; it provides reference for other similar system.