Manual quantitative ultrasonic detection method and device for defects in thin special structure fillet welds

Through the manual quantitative ultrasonic detection method and the simplified guided wave detection device, the problems of large size and poor applicability of the fully automatic device in the existing technology are solved, and rapid and accurate quantitative detection of thin special structure fillet welds is achieved, thereby improving the detection efficiency and result accuracy.

CN119246691BActive Publication Date: 2025-09-23JILIN UNIVERSITY
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Patent Information

Application Number
CN202411440034.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-15
Publication Date
2025-09-23
Estimated Expiration
2044-10-15

AI Technical Summary

Technical Problem

Existing fully automatic ultrasonic testing devices are large in size, not suitable for special corner joint detection, have complex structures, and are difficult to repair and maintain. It is difficult to achieve accurate and concise detection in thin special structures.

Method used

A manual quantitative ultrasonic testing method is adopted, guided wave detection is utilized, and through the extraction of guided wave echo feature values ​​and B-scan detection images, combined with a step-by-step positioning photoelectric sensor and a spring mechanism, a simplified detection device is designed to adapt to different workpiece structures and realize quantitative identification and calibration of defects.

Benefits of technology

It realizes rapid and accurate quantitative detection of thin corner welds with special structures, improves detection efficiency, simplifies the device structure, is easy to maintain, has strong applicability and accurate detection results.

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Abstract

The present invention relates to a manual quantitative ultrasonic detection method and device for defects in thin special structure corner welds, and belongs to the field of non-destructive testing of welding quality. The detection device uses an industrial computer and a built-in ultrasonic pulse sound card to control the pulsed emission and reception of the ultrasonic probe, and realizes manual precise step-by-step positioning detection of the ultrasonic detection device based on a photoelectric sensor, and collects and processes the echo signal and quantitatively evaluates the defect size. The semi-automatic design simplifies the structure and greatly reduces the volume. It has good applicability, high reliability and is easy to maintain. The detection method adopts guided wave detection to greatly improve the detection efficiency. The B-scan diagram established by the characteristic value of the guided wave can intuitively determine whether there is a defect. The size of the defect can be quantitatively calibrated by the attenuation relationship of the defect edge, making the determination of the defect more accurate and efficient. The present invention realizes the rapid and accurate quantitative detection of defects in thin special structure corner welds of different plate thicknesses.
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