Miniature tensile testing machine control system based on Raspberry Pi

Abstract

The invention discloses a miniature tensile testing machine control system based on Raspberry Pi. The miniature tensile testing machine control system comprises a miniature tensile testing machine, a Raspberry Pi 4B development board, a power transmission module, a signal acquisition module, an industrial camera, a power supply module and an IPS display screen. The Raspberry Pi 4B development board is connected with the power transmission module, the signal acquisition module, the industrial camera and the IPS display screen, the power supply module provides a working power supply for the system, and meanwhile, the Raspberry Pi 4B development board compiles and runs in the Raspberry Pi 4B development board to realize power transmission, a Python instruction for real-time signal acquisition and a template matching algorithm based on a DIC technology. And controlling the micro tensile testing machine to carry out a tensile test, and accurately measuring an engineering stress-strain curve of the sample in the tensile process. According to the invention, a motion control card and a data acquisition card which are large in size and high in cost are not needed, and the axial tensile test can be accurately and rapidly carried out only based on the Raspberry Pi 4B development board which is small in size, low in cost and multifunctional, so that the research on the tensile mechanical property of the material is realized.

Description

technical field [0001] The invention relates to the technical field of micro tensile testing machine control, in particular to a micro tensile testing machine control system based on raspberry pie. Background technique [0002] The material testing machine is a precision testing instrument for testing the mechanical properties of rubber, plastics, textiles, waterproof materials, wires and cables, metals and other materials under various conditions and environments, such as tension, compression, bending, shearing, tearing, etc. , with the continuous development of new materials, new processes, new technologies and new structures, the size of various devices is becoming more and more miniaturized, and it is particularly important to measure the microscopic shape of materials. The micro tensile testing machine is a precision instrument with small size, high measurement accuracy and fast response speed. At present, the existing control system of the micro tensile testing machine...

AI Technical Summary

Problems solved by technology

The micro tensile testing machine is a precision instrument with small size, high measurement accuracy and fast response speed. At present, the existing control system of the micro tensile testing machine is only directly applied to the universal material testing machine through the image processing system for image acquisition and Analysis of measurement results, high-speed real-time full-field measurement is not possible

In addition, the overall control system is large in size, high in cost, and complex in operation, and cannot be applied in the field where real-time measurement is required

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