Device and method for measuring aperture of foamed aluminum based on machine vision

Abstract

The invention relates to a device and method for measuring the aperture of foamed aluminum, in particular to a device and method for measuring the aperture of foamed aluminum based on machine vision. The device comprises an image capture working machine, an optical fiber signal transmitter and a computer, wherein the upper surface of the image capture working machine is provided with an X-axis working table; a Y-axis working table is arranged below the X-axis working table; an upright post is arranged at one side of the image capture working machine; and photographing equipment is arranged at one side of the upright post opposite to the working table. The invention aims to disclose a method for measuring the aperture of the foamed aluminum or foamed aluminum alloy by using the machine vision, namely an image of a sectional aperture condition of the measured foamed aluminum is directly acquired through a camera and then is transmitted to the computer; and the image is accurately analyzed and calculated by using computer software to obtain the size of the aperture. The method is intuitive, simple and convenient; and errors brought by visual observation can be avoided, so that the data are more accurate and great help is provided for the research of the aperture and the porosity of the foamed aluminum or foamed aluminum alloy.

Description

technical field [0001] The invention relates to a device and method for measuring the pore size of foamed aluminum, in particular to a device and method for measuring the pore size of foamed aluminum based on machine vision. Background technique [0002] Foamed aluminum is a new type of composite metal material with a large number of pore structures. The general porosity is 40% to 98%. It has light weight, high specific strength, damping and shock absorption, high impact energy absorption and excellent sound absorption, heat insulation, Various physical properties such as heat dissipation and electromagnetic shielding have been applied in aviation, aerospace, automobile manufacturing, rail transit and other fields. In many practical applications at present, foamed aluminum alloy products are more widely used than simple foamed aluminum materials. Therefore, aluminum foam or aluminum alloy has become one of the hot research materials in many countries in the 21st century; the...

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Problems solved by technology

[0002] Foamed aluminum is a new type of composite metal material with a large number of pore structures. The general porosity is 40% to 98%. It has light weight, high specific strength, damping and shock absorption, high impact energy absorption and excellent sound absorption, heat insulation, Various physical properties such as heat dissipation and electromagnetic shielding have been applied in aviation, aerospace, automobile manufacturing, rail transit and other fields. In many practical applications at present, foamed aluminum alloy products are more widely used than simple foamed aluminum materials. Therefore, aluminum foam or aluminum alloy has become one of the hot research materials in many countries in the 21st century; the main parameters affecting the overall performance of aluminum foam are reflected in the pore size and porosity of aluminum foam, so the measurement of the pore size of the prepared aluminum foam is an important way to investigate this An important condition for the overall performance of foamed aluminum, and the current method of measuring the pore size of foamed aluminum generally adopts the visual comparison method, which is to cut a plane of the foamed aluminum to be measured, and collect images of the holes in the cut plane, and then compare the holes in the collected images with the Visually compare the holes with preset pore diameters in the comparison piece, and regard the pore diameter of the closest comparison piece as the pore size of a certain hole in the aluminum foam. or bring a lot of labor intensity

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