Intersecting local feature description method, server and system based on two-surface frame

A local feature and server technology, applied in metal processing equipment, complex mathematical operations, welding equipment, etc., can solve problems such as lack of technology and difficult realization of technology

Inactive Publication Date: 2018-01-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no systematic research on the characteristics and description of intersecting lines, and the lack of a theoretical system will make it difficult to realize related technologies, such as groove welding of intersecting lines, weaving welding, multi-layer multi-pass welding, etc.

Method used

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  • Intersecting local feature description method, server and system based on two-surface frame
  • Intersecting local feature description method, server and system based on two-surface frame
  • Intersecting local feature description method, server and system based on two-surface frame

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Embodiment Construction

[0042] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0043] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0044] figure 1 is a flow chart of a method for describing coherent local features based on a dihedral frame in...

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Abstract

The invention discloses an intersecting local feature description method, server and system based on a two-surface frame. The method comprises the following steps that: S1: obtaining the homogeneous coordinates of any point OF on an intersecting line independently on a main pipe coordinate system [M] and a branch pipe coordinate system [B] so as to solve the homogeneous transformation matrixes ofthe main pipe coordinate system [M] and the branch pipe coordinate system [B]; S2: constructing the two-surface frame in the adjacent area of any point OF on the intersecting line; and S3: solving thefeatures of the two-surface frame in the adjacent area of any point OF on the intersecting line.

Description

technical field [0001] The invention belongs to the field of coherent local feature description, and in particular relates to a method, server and system for coherent local feature description based on a dihedral framework. Background technique [0002] Intersecting curve welding is a typical welding task in fields such as petrochemical industry, pipeline engineering and pressure vessel manufacturing. Due to the complexity of intersecting curve welds and the limitations of the functions of existing automatic welding equipment, the degree of automation of intersecting curves has been at a low level, especially for complex related pipelines with multiple branches and co-main pipes, manual welding is generally used way of working. [0003] In the automatic welding of intersecting lines, two cylindrical surfaces intersect to produce a complex intersecting line, and the intersecting local feature refers to the shape of the two-sided frame formed by two curved surfaces and their ...

Claims

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Application Information

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IPC IPC(8): G06F17/16B23K31/00
Inventor 田新诚石磊刘燕
Owner SHANDONG UNIV
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