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
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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