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Pipeline Connector Detection Method Based on Complex Continuous Wavelet Transform

A technology of wavelet transform and detection method, which is applied in the field of pipeline surveying and mapping, and can solve the problems of easy corrosion and cracking.

Inactive Publication Date: 2020-07-31
HARBIN ENG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, most of the pipe joints are connected by welding or screws, which are prone to corrosion or even rupture in the long-term underground environment

Method used

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  • Pipeline Connector Detection Method Based on Complex Continuous Wavelet Transform
  • Pipeline Connector Detection Method Based on Complex Continuous Wavelet Transform
  • Pipeline Connector Detection Method Based on Complex Continuous Wavelet Transform

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Embodiment Construction

[0035] The present invention is described in detail in conjunction with the accompanying drawings. It should be noted that the gyroscopes, accelerometers and strapdown inertial navigation systems involved in the method are all typical inertial devices and navigation and positioning systems, and the pipeline measurement device is a typical pipeline detection system. Therefore the present invention no longer describes its principle in detail:

[0036] figure 1 As shown, the schematic diagram of the detection of pipeline connectors by complex continuous wavelet transform. The three-axis gyroscope and the three-axis accelerometer installed in the pipeline measuring device respectively sense the rotation angular rate and the linear acceleration of the pipeline measuring device when it moves in the pipeline. The angular rate of rotation measured by the three-axis gyroscope is used to determine whether the pipeline measurement device passes through the curved pipeline. Among them, ...

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Abstract

The invention belongs to the field of pipeline surveying and mapping, and specifically relates to a pipeline connector detection method based on complex continuous wavelet transform. The invention includes: using the inertial sensor measurement data used for pipeline detection and positioning in the pipeline detection device; and using the complex continuous wavelet transform method to analyze the inertial sensor measurement data in the pipeline, and extracting the data by singularity analysis of the inertial sensor measurement data. The time period corresponding to the pipeline connector is obtained; at the same time, combined with the pipeline position and time relationship calculated by the pipeline detection and positioning system, the distribution of pipeline connectors at different positions of the pipeline can be obtained by performing time synchronization calculations on the two. The detection results of pipeline connectors not only facilitate the maintenance of corrosion-prone and rupture-prone parts such as pipeline segment connectors, but also provide continuous azimuth and pitch angle error correction for the inertial-assisted pipeline detection and positioning system in straight pipeline sections to improve inertial assistance. Positioning and orientation accuracy of pipeline inspection and positioning systems.

Description

technical field [0001] The invention relates to a detection method of a pipeline connector based on complex continuous wavelet transformation, which belongs to the field of pipeline surveying and mapping. Background technique [0002] Pipelines are the most efficient, convenient and safe way to transport resources such as oil, gas or water. As a large number of previously laid pipelines have reached or exceeded their service life, the environmental pollution and economic losses caused by pipeline leakage are very serious, and even the safety threat caused by pipeline explosion is inestimable. The pipeline measuring device is the most effective tool for detecting and locating pipeline defects in the pipeline, and has become the first choice tool for periodic inspection of various pipelines. In addition, natural factors such as mudslides, landslides, and permafrost thawing will also cause pipeline deformation. The pipeline measurement device can be used to effectively measure...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G01C21/16
CPCG01C21/16G01N33/00G01N33/0078
Inventor 管练武曾建辉高延滨张庆许德新何昆鹏胡文彬霍亮丛晓丹
Owner HARBIN ENG UNIV