TOFD检测连续尖角人工缺陷对比试块的应用
Application of comparison test block for TOFD testing of continuous sharp angle artificial defects
摘 要
在对较厚工件进行TOFD (超声波衍射时差法)分区检测时，通常需要使用对比试块来进行深度的校准和检测灵敏度的确定。现在通用的TOFD对比试块在进行厚工件检测灵敏度参数设置验证、二区以后A扫描深度范围的验证、时间窗口深度范围内相对应的A扫描波幅幅值差验证时，其结果并不理想。笔者设计了一种连续尖角人工缺陷对比试块，该对比试块制作较为方便经济，形状较小，使用简单，能够准确地对TOFD检测所需要的深度进行覆盖，且能够对深度覆盖范围内A扫描波幅幅值差以及检测灵敏度进行验证。
对比试块
A扫描时间设置
检测灵敏度
声束有效覆盖
TOFD testing
reference block
A-scan time setting
detection sensitivity
effective coverage of sound beam
Abstract
When performing TOFD zone testing on thicker workpieces, it is usually necessary to use a contrast test block for depth calibration and detection sensitivity determination. However, when the general TOFD comparison test block is used for the verification of the detection sensitivity parameter setting of thick workpieces, the verification of the A-scan depth range after the second zone, and the verification of the corresponding A-scan wave amplitude difference within the depth range of the time window, the results are not ideal. The author designed a continuous sharp-angled artificial defect comparison test block. The comparison test block, being small in shape and simple in use, is more convenient and economical to make and it can accurately cover the depth required for TOFD inspection and also cover the depth range. The A-scan amplitude difference and detection sensitivity are verified.
中图分类号 TG115.28 DOI 10.11973/wsjc202202014
所属栏目 仪器研制
基金项目
收稿日期 2021/3/14
修改稿日期
网络出版日期
作者单位点击查看
联系人作者裴延东(peiyd@hdmdi.com)
备注裴延东(1988-)，男，本科，工程师，主要研究方向为无损检测、焊接工艺以及电力工程金属监督
引用该论文: PEI Yandong,XIE Gaowei,MA Changquan,YANG Xingbin,SUN Wenqi. Application of comparison test block for TOFD testing of continuous sharp angle artificial defects[J]. Nondestructive Testing, 2022, 44(2): 65～72
裴延东,谢高伟,马昌全,杨兴斌,孙文琦. TOFD检测连续尖角人工缺陷对比试块的应用[J]. 无损检测, 2022, 44(2): 65～72
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参考文献
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【4】MOURA E P,SILVA R R,SIQUEIRA M H S,et al.Pattern recognition of weld defects in preprocessed TOFD signals using linear classifiers[J].Journal of Nondestructive Evaluation,2004,23(4):163-172.
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【11】裴延东,杨兴斌,张佳臣,等.超声波衍射时差法扫查面盲区对比试块[J].无损检测,2020,42(10):69-71.
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