Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Corrosion morphology quantitative detection method of outer wall of pipeline

A quantitative detection method, a technology for the outer wall of a pipeline, which is applied in measurement devices, optical testing flaws/defects, instruments, etc., can solve the problems of high detection cost, small measurement range, low measurement accuracy, etc., and achieves strong anti-interference ability and measurement range. The effect of large, high measurement accuracy

Active Publication Date: 2016-04-13
PETROCHINA CO LTD
View PDF10 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the instruments and equipment involved in these methods are complex in structure, difficult to operate, and the detection cost is high, which is not in line with economic interests. In addition, there is no detection method that is used for surface morphology detection of devices such as transportation pipelines in the petrochemical industry. The study of the corrosion mechanism cannot provide a better post-solution method, and cannot effectively and intuitively perform quantitative characterization of the surface morphology of the pipeline
[0006] At present, the 3D optical dense point cloud scanning measurement system at home and abroad mainly adopts the 3D measurement technology of Gray code plus phase shift, uses multiple Gray code gratings to mark the measurement area in grades, and then uses a single grating for phase shift measurement. Although the operation is simple and easy Realize productization, but the measurement accuracy is low, the single measurement range is small, and it is impossible to measure dark or workpieces with drastic surface changes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Corrosion morphology quantitative detection method of outer wall of pipeline
  • Corrosion morphology quantitative detection method of outer wall of pipeline
  • Corrosion morphology quantitative detection method of outer wall of pipeline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a method for quantitative detection of corrosion appearance on the outer wall of a pipeline, which includes the following steps:

[0027] Step 1) Collect point clouds on the surface of the corroded pipeline;

[0028] Step 2) reversely restore the collected point cloud to a 3D solid image of the pipeline;

[0029] Step 3) Analyze the three-dimensional solid image of the pipe surface, take the inner wall as the reference plane, and the outer wall as the test object to obtain the actual pipe wall thickness in different areas, and use different colors to represent different actual pipe wall thicknesses to reflect different areas of the outer wall of the pipe The size of the degree of corrosion.

[0030] After the point cloud is collected, the corrosion pipeline is reversely restored, and the following is obtained: figure 1 The three-dimensional topography of corrosion on the pipeline surface is shown, figure 1 The appearance of the outer wall sho...

Embodiment 2

[0032] On the basis of Example 1, the specific process of point cloud acquisition on the surface of the corroded pipeline is as follows:

[0033] (1) Remove the paint and corrosion products on the outer surface of the pipeline, remove the rust on the surface with a copper brush, and clean the surface of the pipeline with alcohol and acetone, so that the matrix on the surface of the pipeline is completely exposed;

[0034] (2) Apply a layer of white imaging agent evenly on the outer surface of the pipe, then paste at least three marking points on the outer surface, and then use the calibration plate to calibrate;

[0035] (3) Start scanning, and project gratings of various frequencies onto the pipeline of the object to be tested through the grating projector, and two CCD cameras receive a corresponding angled image at the same time, and then decode and phase calculate the image;

[0036] (4) Multi-view and multiple omni-directional scans are performed on the surface of the pipe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a corrosion morphology quantitative detection method of the outer wall of a pipeline. The method provided by the invention comprises the following steps: 1) point cloud acquisition; 2) three-dimensional entity image reduction; 3) analysis of a three-dimensional entity image at the surface of a pipeline. The method provided by the invention is able to visually reflect the corrosion degrees of different areas of the outer wall, the deviation of the inner surface and the outer surface is highlighted through establishing of marks at special positions, and the quantitative analysis of the variation trend of the corrosion degree at the cross section is realized.

Description

technical field [0001] The invention belongs to the technical field of corrosion detection, and in particular relates to a quantitative detection method for the corrosion appearance of the outer wall of a pipeline. Background technique [0002] In the oil and gas industry, pipeline transportation occupies an important position, which has the characteristics of high efficiency and low transportation cost. The environment in which the pipeline is located often causes corrosion on the surface of the pipeline due to many factors (such as acidic gas, etc.), resulting in pits or even perforations on the surface, which seriously affects the service life of the pipeline, and even accidents occur, which is very harmful. Therefore, the research on the corrosion mechanism of pipelines and the corresponding anti-corrosion measures have become an important research topic in the petrochemical industry, and the analysis of the surface morphology of corroded pipelines is an important part o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/06G01N21/88
CPCG01B11/06G01N21/8851G01N2021/8887
Inventor 解永刚田喜军韩东兴高亮王轩徐勇王霞王蕾刘青江国旗季伟马鹏飞王升
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com