Automatic evaluation method, system and equipment for longitudinal ultrasonic phased array of welded pipe end welds

The automatic evaluation method of longitudinal ultrasonic phased array for welded pipe end welds has solved the shortcomings of manual inspection methods for longitudinal defects in welded pipe end welds in terms of accuracy, efficiency and quality traceability. It has achieved automated and accurate inspection and full-process quality traceability, thus improving the manufacturing quality of welded pipes.

CN122084745APending Publication Date: 2026-05-26CHINA NAT PETROLEUM CORP +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NAT PETROLEUM CORP
Filing Date
2025-12-18
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing manual methods for detecting longitudinal defects in welded pipe ends have serious shortcomings in terms of accuracy, efficiency, cost, and quality traceability, resulting in poor reliability, low efficiency, and difficulty in achieving quality traceability.

Method used

An automatic evaluation method for longitudinal ultrasonic phased array weld seams at the pipe ends is adopted. The spectral data is obtained by ultrasonic phased array scanning, preprocessed and partitioned, and the echo signals of inherent structures are filtered out. The software algorithm is used to automatically identify and evaluate longitudinal defects and generate full-process quality data.

Benefits of technology

It improved the objectivity and consistency of testing, reduced labor intensity, ensured the accuracy and reliability of test results, realized full-process quality traceability, and improved the quality level of welded pipe manufacturing.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention belongs to the field of nondestructive testing and relates to an automatic evaluation method, system, and equipment for longitudinal ultrasonic phased array weld seams at the pipe ends of welded pipes. It aims to address serious deficiencies in accuracy, efficiency, cost, and quality traceability. The invention includes: acquiring three-dimensional ultrasonic phased array data and innovatively dividing the weld seam longitudinally to identify different sections such as the original weld seam area and the grinding area. It adaptively and precisely filters out echoes from complex weld seam geometries, and through three-dimensional connected component analysis, filters out defect signals with longitudinal extension characteristics from the residual data, quantifying their key features such as length, width, and intensity. These feature quantities are automatically compared with preset acceptance standard thresholds to determine whether the longitudinal defects are qualified or unqualified. This invention, through partitioned adaptive filtering and automated evaluation, significantly improves the accuracy and reliability of complex weld seam defect detection, achieves full-process automation, and reduces human interference.
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