Pipeline measuring method and device

Abstract

The invention discloses a pipeline measurement method and device. The method comprises the steps: calibrating a multi-view camera system and a measurement platform; calculating an effective region of an image actually shot by the multi-view camera system; meanwhile, calculating the conversion relation between the coordinate matrix of the mark point under the coordinate system of the measuring platform and the coordinate matrix of the mark point under the coordinate system of the camera; moving the calibrated multi-view camera system on the calibrated measuring platform in the extending direction of the pipeline to be measured; continuously shooting a plurality of to-be-detected pipeline images in effective areas in a segmented mode; then performing image preprocessing; calculating the position area of each pipeline section in the corresponding image; by using a detection cylinder model, performing retrieval matching through the cylinder center point of the cylinder model to obtain the central axis position of each pipeline section; reconstructing a model of each section of pipeline according to the position of the central axis; splicing images corresponding to sections of the pipeline model and calculating data of each section of pipeline after coordinate transformation; and outputting a total pipeline model and pipeline data.

Description

technical field [0001] The invention relates to the field of pipeline measurement, in particular to a pipeline measurement method and a device thereof. Background technique [0002] As a structure that can transport materials and connect, pipelines are widely used in automobiles, ships, aerospace and other fields. And because of its wide range of scenarios, the detection of pipelines has become a popular research direction in recent years. Due to the different sizes of pipelines, it also poses a lot of challenges to the detection methods. At present, most of the measurement methods are aimed at the pipe fittings whose length is within 2m, and there is still no good solution for the measurement of pipe fittings beyond the 2m range. [0003] The measurement of pipelines can be divided into two types: contact type and non-contact type according to the implementation method. At present, the most widely used and most accurate contact type measurement is three-coordinate measure...

AI Technical Summary

Problems solved by technology

Due to the long measurement time and high technical difficulty requirements of this measurement method, it can only be applied to occasions where the instrument can touch the measurement scene, and cannot meet the measurement requirements of long pipelines.

[0004] As a typical representative of the active vision method of non-contact measurement, structured light scanning can divide and extract the characteristic area of ​​the image by projecting modulated laser light or speckle on the surface of the object, and the industrial camera collects the pipeline with the characteristic image on the surface. , stitching point clouds to realize pipeline reconstruction, although compared with three-coordinate measurement, the measurement time is significantly shortened, but the measurement accuracy is easily affected by the equipment detection accuracy

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