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相控阵超声检测国际及动态.doc

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相控阵超声检测国际动态.txt熬夜,是因为没有勇气结束这一天;赖床,是因为没有勇气开始这一天。朋友,就是将你看透了还能喜欢你的人。 本文由weldzsy贡献 pdf文档可能在WAP端浏览体验不佳。建议您优先选择TXT,或下载源文件到本机查看。 相控阵超声检测国际动态 李衍 (无锡市锅炉压力容器学会无损检测专委会,无锡214026) 摘要:相控阵超声(UT)有探头阵元激励(振幅和延时)由计算机控制,声束参数如角度、焦 距和焦点等可通过软件调整的种种优点。介绍了超声相控阵技术在工业上的应用类另日和实例动 态,包括航空航天、核电设备、承压设备在制在用检测,具有对复杂几何形状或可接近性受限工件检 测的适应性,对缺陷定量表征的优越性。也介绍了相控阵应用的有关标准动态及法规对相控阵操 作演示的立项要求,旨在为国内推广该新技术提供借鉴。 关键词:超声检测;相控阵;工业应用;缺陷定量;操作演示;标准化 中图分类号:TGll5.28 文献标识码:A 文章编号:1000-6656(2009】01—0056—05 Worldwide Trend of Phased Array Ultrasonic Testing LIYah (NDT Subcommittee of Wu】【i Boiler and Pressure Vessel Society-Wu妇214026-China) Abstract:Phased array(PA)ultrasonic technology has the advantages that the elements of search units as can be excited size in amplitude and delay by computer,and the beam parameters such angle。focal distance and focal spot can be adjusted by software.This paper outlines the application classification and practical examples-including manufacturing and service inspections used in the aerospace industry-nuclear power equipment and pressure equipment etc.Main On its emphasizes are put on its suitability tO the objects with complicated shape.or with limited approach areas-and superiority PA as a over defect sizing and characterization.Also.the relevant standardization of as basis of application-and the performance demonstration to the necessary procedure our specified country. by the code are introduced.The intention is provide a reference for spreading the new technology in Keywords:Ultrasonic testing;Phased array;Industrial Standardization application;Defect sizing;Performance demonstration; 相控阵的超声显像法,十多年前就在医疗领域 使用了,据悉最近又可通过四维图像,使胎儿显像更 为鲜明。所谓四维,是指将三维图像实时显示,有栩 栩如生的动画效果。在工业领域的相控阵超声无损 再建较容易。但工业上,钢铁材料特别是焊缝检验 不仅有纵波,还有横波和表面波及板波等波型产生, 它们重叠显示在图像上,干扰图像识别。而且,检测 对象一般多较大,操
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