Method and device for identifying defect position of pipeline based on phase locus partitioned by round window

A defect location and phase trajectory technology, which is applied in the processing of detection response signals, and the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve problems such as unclear pipeline damage, waste of manpower and material resources, and lack of scientific maintenance

Inactive Publication Date: 2014-11-19
JINAN UNIVERSITY
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Problems solved by technology

However, due to the constraints of detection methods, most of the pipeline damage is unknown, often resulting in blind excavation, blind scrapping, and lack of scientific maintenance, resulting in a huge waste of manpower and material resources

Method used

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  • Method and device for identifying defect position of pipeline based on phase locus partitioned by round window
  • Method and device for identifying defect position of pipeline based on phase locus partitioned by round window
  • Method and device for identifying defect position of pipeline based on phase locus partitioned by round window

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Embodiment 1

[0055] Such as figure 1 As shown, the device for identifying the location of pipeline defects in this embodiment includes an arbitrary waveform signal generator (using AFG3252), a power amplifier (using AG1020), a piezoelectric ring, a digital oscilloscope (using DPO4054B), a computer, and 16 piezoelectric ceramic sensors. The piezoelectric ring is arranged on the end face of one side of the pipeline, and the 16 piezoelectric ceramic sensors are arranged at 10 mm away from the position of the piezoelectric ring; the arbitrary waveform signal generator, power amplifier and piezoelectric ring are connected in sequence, and the The arbitrary waveform signal generator and the piezoelectric ceramic sensor are respectively connected with two channels (channel 1 and channel 2) of a digital oscilloscope, and the digital oscilloscope is connected with a computer.

[0056] Such as figure 2 As shown, the method for identifying the position of a pipeline defect in this embodiment takes ...

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Abstract

The invention discloses a method and a device for identifying a defect position of a pipeline based on a phase locus partitioned by a round window. The method comprises the following steps: (1) stimulating ultrasonic guided wave signals on an end face of one side of the pipeline to enable ultrasonic guided waves to traverse all positions of the pipeline; (2) collecting echo signals at a site 10mm away from a stimulation end, and recording a time history curve of ultrasonic guided waves propagated in the pipeline; (3) calculating the detected echo signals by virtue of a Duffing chaotic system to obtain a phase locus of the ultrasonic guided wave signals, portioning the phase locus into two parts in and out of the round window by virtue of the round window so as to realize conversion from a two-dimensional phase diagram to a one-dimensional time signal, judging whether the pipeline is damaged or not according to a border line equation of the round window, if the pipeline is damaged, extracting a time point of the first ultrasonic guided wave signal entering the round window, and calculating by virtue of a wave velocity and time formula, so as to obtain information of the defect position of the pipeline. With the adoption of the method and the method, the detection efficiency of pipe detects can be improved, the maintenance cost can be reduced, and thus the method and the device have practical engineering application values.

Description

technical field [0001] The invention relates to a method for identifying defect location information in pipelines, in particular to a method for identifying pipeline defect locations based on round window segmented phase trajectories, belonging to the technical field of damage detection in the pipeline transportation industry. Background technique [0002] Pipeline transportation is known as the fifth largest means of transportation after railways, highways, aviation, and sea transportation. It is an important part of urban lifeline projects. Security service poses a potential threat. Therefore, it is necessary to analyze and identify the damage condition of the pipeline. [0003] In order to prevent the occurrence of pipeline vicious accidents, the annual maintenance cost of oil and gas pipelines in my country amounts to hundreds of millions of yuan, and it increases year by year. However, due to the constraints of detection methods, most of the pipeline damage is unknown...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/07G01N29/44
Inventor 杨飞严寅中马延鋆马宏伟
Owner JINAN UNIVERSITY
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