Ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device

An ultrasonic guided wave and pipeline inspection technology, which is used in measuring devices, solids analysis using sonic/ultrasonic/infrasonic waves, and material analysis using sonic/ultrasonic/infrasonic waves, etc. Low resolution, difficult to overcome the contradiction between the ultrasonic guided wave detection resolution and the moving distance of the focus point, etc.

Pending Publication Date: 2020-02-28
CHINA JILIANG UNIV
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Problems solved by technology

When using ultrasonic guided wave focus detection, if a lower frequency is used, the detection range of the ultrasonic guided wave at the focal point is larger, and a larger moving distance of the focus point can be used, but the detection resolution of the ultrasonic guided wave is low, which is suitable for defect detection. Roughly qualitative; if a higher frequency is used, the detection resolution of the ultrasonic guided wave is higher, but the detection range of the ultrasonic guided wave at the foc

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  • Ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device
  • Ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device
  • Ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with drawings and embodiments.

[0036] as attached figure 1 As shown, an ultrasonic guided wave pipeline detection method capable of realizing multi-resolution focused imaging provided by the present invention, the steps are as follows:

[0037] (1) Calculate the dispersion characteristics of ultrasonic guided waves used in pipeline inspection

[0038] According to the geometric dimensions such as the inner and outer diameters of the pipe and the material mechanical parameters such as Young's modulus and Poisson's ratio, the dispersion characteristics of the SH0 mode ultrasonic guided wave are solved by a commercial ultrasonic guided wave dispersion characteristic calculation program.

[0039] (2) Determine the detection area of ​​ultrasonic guided wave focusing imaging

[0040] According to the working conditions of the pipeline, the inspectors predict the pipeline area that may have defects, and d...

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Abstract

The invention discloses an ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device, and belongs to the technical field of nondestructive testing. The method comprises the steps of: calculating the frequency dispersion characteristic of an SH0 modal ultrasonic guided wave according to the geometric dimension and the material mechanics parameters of a pipeline;on the basis, adopting low-frequency ultrasonic guided waves for quickly scanning a pipeline area where defects possibly exist, and roughly positioning the defects; quickly scanning refined grids in areas near the image defects by using low-frequency ultrasonic guided waves, and carrying out high-frequency fine detailed inspection; and fusing low-frequency rapid scanning and high-frequency fine detailed information to generate an ultrasonic guided wave multi-resolution focusing image. The contradiction between the ultrasonic guided wave detection resolution and the detection efficiency is solved, and a foundation is laid for efficient ultrasonic guided wave focusing imaging detection of the pipeline.

Description

technical field [0001] The invention relates to an ultrasonic guided wave pipeline detection method and device, in particular to an ultrasonic guided wave pipeline detection method and device capable of realizing multi-resolution focused imaging, and belongs to the technical field of nondestructive testing. Background technique [0002] Pipelines are an important way to transport oil and gas resources, and their damage and leakage will cause serious economic losses and casualties. Therefore, pipelines must be inspected regularly to find potential hidden dangers in time. Ultrasonic guided wave inspection is an important method of pipeline inspection, which has the characteristics of long detection distance, high efficiency and good adaptability. It has been widely used in the field of pipeline inspection in recent years. At present, ultrasonic guided wave detection has developed from simple echo detection to imaging detection, which improves the detection sensitivity and real...

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Application Information

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IPC IPC(8): G01N29/06G01N29/04G01N29/26F17D5/06
CPCF17D5/06G01N29/04G01N29/069G01N29/262G01N2291/0289G01N2291/262
Inventor 胡剑虹张砀砀梁明轩何丽敏柯海森
Owner CHINA JILIANG UNIV
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