摘要：As a technological advantage of ultrasonic non-destructive testing, fully focused imaging can accurately feedback the defective characteristics of the inspected object, greatly improving the detection efficiency. This article aims to address the challenges of outdated and low detection rates in the detection technology of branch pipe fillet welds. The full matrix acquisition (FMC) and total focus method (TFM) ultrasonic detection technology are used for detection and defect image feature analysis. Firstly, a multi-mode, fully focused real-time imaging software system was developed to address the specificity of the detection object; secondly, a phased array detection system based on 64 elements was constructed; finally, a region wavelet denoising method based on TFM images was proposed to solve the problem of artifacts caused by poor coupling; and based on the feature extraction method for a minimum rectangle, we analyzed the size, position, angle, and other information regarding defects. Through experiments, it has been found that this technology can effectively improve the detection efficiency of branch pipe weld defects, with a detection rate of 100%. Based on the partition fusion denoising method, the defect imaging quality can be further improved; at the same time, based on the feature extraction method, the error is 0.1 mm, the length range of various defects is 2.3 mm-6.3 mm, the width range is 0.6 mm-0.8 mm, and the angle range is 52 degrees-75 degrees, which can provide an application basis for the localization, classification, and risk assessment of corner weld defects in branch pipes.

关键字：FMC-TFM; weld inspection; noise reduction; feature extraction

ISSN号：2076-3417

卷、期、页：卷14期21

发表日期：2024-11-01

期刊分区（SCI为中科院分区）：四区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：APPLIED SCIENCES-BASEL

参与作者：卜阳光,程经纬

通讯作者：王禹钦,李勇,魏昊天

第一作者：董绍华

论文类型：期刊论文

论文概要：王禹钦,李勇,卜阳光,董绍华,魏昊天,程经纬，Research on Region Noise Reduction and Feature Analysis of Total Focus Method Ultrasound Image Based on Branch Pipe Fillet Weld，APPLIED SCIENCES-BASEL，2024，卷14期21

论文题目：Research on Region Noise Reduction and Feature Analysis of Total Focus Method Ultrasound Image Based on Branch Pipe Fillet Weld