An automatic evaluation method, system and device for the end face of a welded pipe end

By using ultrasonic phased array probes for automatic scanning and image processing algorithms, full coverage inspection of welded pipe ends is achieved, solving the blind spots and subjectivity problems of manual inspection, improving the accuracy and efficiency of inspection, and establishing a digital quality traceability system.

CN122084746APending 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

In the existing technology, the inspection of the end face of welded pipes relies on manual scanning, which has blind spots, and the inspection results are greatly affected by human factors. It is difficult to achieve automation and digitization, resulting in low inspection efficiency, unstable quality, and lack of traceability.

Method used

An automatic evaluation method using ultrasonic phased array is adopted. The ultrasonic phased array probe is used to automatically scan and obtain multi-dimensional spectral data. Combined with image processing and feature extraction algorithms, the end face of welded pipe is automatically and standardized for inspection and evaluation. A three-dimensional geometric model is constructed to remove structural echo signals, and multi-parameter confidence scoring and gray-scale integral curve are used to detect defects.

Benefits of technology

It has achieved full coverage inspection of the end face of welded pipes, reduced human error, improved the accuracy and efficiency of inspection, established a digital quality traceability system, and reduced labor costs.

✦ 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 ultrasonic phased array testing of welded pipe end faces. It aims to solve the problems of high subjectivity, low efficiency, and lack of digital traceability in manual inspection of welded pipe ends. The invention includes: acquiring spectral data from two circumferential directions, one vertical wall thickness direction, and one axial detection direction, and selecting target image data from them. For circumferential data, longitudinal non-layered defects are evaluated based on whether the signal parameters exceed a first preset standard; for vertical wall thickness data, layered defects are evaluated based on whether the signal indication magnitude exceeds a second preset standard; for axial data, inherent structural echoes are intelligently identified and filtered out based on a three-dimensional model of the pipe end and a path-amplitude difference fusion algorithm, and transverse non-layered defects are evaluated based on whether the residual signal parameters exceed a third preset standard. This invention achieves automated and standardized detection and evaluation of welded pipe end defects, improving the objectivity, efficiency, and quality traceability of the inspection.
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