Non-contact gravel aggregate grain size and grain shape detector and detection method

Abstract

The invention discloses a non-contact gravel aggregate grain size and grain shape detector and a detection method. The detector comprises a feeding system, an image acquisition system, an image processing and analyzing system and a display system, wherein the image acquisition system comprises a light source, a background plate and acquisition equipment; the light source is opposite to the acquisition equipment, an image detection region is formed between the light source and the acquisition equipment, the background plate is positioned in the detection region close to the light source, a discharging (feeding) opening of the feeding system is positioned at the upper part of the detection region and is close to the background plate, the image processing and analyzing system is connected to the display system through signals, and the display system is used for displaying results and outputting statements. The detector adopts image processing and digital imaging techniques. When a material falls freely from the detection region, the grain size gradation, needle and flake content, sphericity, length-diameter ratio, grain count and other indexes of the material are precisely measured in real time, and through multiple groups of tests, the multiple indexes are integrated to evaluate the performance of the sample on the whole, the specification and grade of gravel aggregate can be determined automatically, and a detection report is provided.

Description

technical field [0001] The invention relates to a sandstone aggregate detection device, in particular to a non-contact sandstone aggregate particle size and shape detector and a detection method. Background technique [0002] At present, the demand for sand and gravel aggregates is large, 1.5 cubic meters per cubic meter of concrete, and the quality of aggregates will directly affect the quality of concrete dams. For concrete that meets certain strength and airtightness requirements, the constructability of the mixture is the most important performance to ensure the final quality of the concrete. For concrete workability, the particle shape of the aggregate sometimes has a greater influence than the gradation. The ideal aggregate particle shape is equal-diameter (that is, macro-spherical). When the surface roughness is the same, the specific surface area of ​​the equal-diameter aggregate is the smallest, and the water demand is the smallest, which can satisfy the properties...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a non-contact sandstone aggregate particle size and shape detector and to use the detector to detect sandstone specifications. On the basis of the national standard, the detector adds the detection of the sphericity and length-to-diameter ratio of sand and gravel aggregates, and realizes the automatic evaluation of the specifications and grades of sand and gravel aggregates. The detection method is simple to operate, and the analysis standards are accurate and unified. Automatic output of analysis results, fast, convenient and practical

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