Method and system for measuring liquid level height of material in material stirring tank

Abstract

The invention discloses a method and a system for measuring the liquid level height of a material in a material stirring tank. The method comprises the following steps: acquiring original three-dimensional point cloud data of a working condition of unloading to the material stirring tank, and constructing a three-dimensional point cloud picture; calibrating key points of a material stirring tank model in a laser radar coordinate system, carrying out first filtering on original three-dimensional point cloud data according to a position range of the key points of the material stirring tank model, and only reserving laser points in the material stirring tank; dividing an ideal laser surface and screening seed points according to the distance of the laser points; constructing a plurality of irregular triangulation networks to extract new feature points; correcting and screening the feature points according to the filtered point cloud data of two frames before and after the current data frame; carrying out curve fitting on the feature points, and obtaining the distances between different liquid level positions and the screen surface by sampling, calculating the distances between sampling points and the screen surface and averaging. The efficiency and the safety degree of stirring work in the material stirring tank can be improved.

Description

technical field [0001] The invention relates to the field of industrial detection, in particular to a method and system for measuring the liquid level height of a material in a material stirring tank. Background technique [0002] Filtration and stirring processes play an important role in our production and life, especially in industrial production processes. Many materials need to be filtered and mixed before further processing, such as the mixing and pouring of concrete at construction sites. Some chemical companies often need to filter and mix raw materials during the product refining process. The process of inputting, stirring and outputting raw materials is continuous in real time. The solid-liquid mixed raw materials are continuously conveyed to the material mixing tank through the conveying channel. a working link. Due to the complexity and inhomogeneity of the properties of the solid-liquid mixed raw materials before mixing, the time for the materials to be stirre...

AI Technical Summary

Problems solved by technology

[0003] (1) There is a jet phenomenon during the mixing process of the material in the material mixing tank, especially when the amount of material in the mixing tank is insufficient (the longest distance can reach tens of meters), which poses a certain degree of threat to the staff;

[0004] (2) Due to the inattention of the staff or due to visual misjudgment, coupled with improper control and other factors, the material in the material mixing tank will overflow;

[0005] (3) Specially hired personnel to artificially control the input speed of materials increases the project cost

However, due to the complexity and changeability of the working environment, the randomness of the discrete points is very large, and the number of discrete points may far exceed the number of real points in some positions. A single traditional filtering method cannot achieve the ideal filtering effect. The straight-through filtering algorithm only It can filter out the known discrete points and cannot b

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