The Use of Squids for Nondestructive Evaluation
The Use of Squids for Nondestructive Evaluation
复制标题
使用鱿鱼进行无损评估
DOI：
10.1007/978-94-011-5674-5_15
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
D. McKirdy
中科院分区：
文献类型：
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作者：
G. Donaldson;A. Cochran;D. McKirdy
我们打开帐户的早期工作SQUID无损检测，描述远程磁力和电流，以及逆问题。然后，我们集中在我们自己的进展映射涡流产生的磁场作为缺陷，在导电结构扭曲他们的流动。本文综述了有限元法、体积积分法及其它求解缺陷位置的方法。接下来，我们转向高TcSQUID系统的发展，集中在“电子梯度计”，其中多个SQUID的输出是不同的，以消除共模字段。对探测器近侧和远侧的断裂试样表面的缺陷进行了成像。此外，他们也已被发现在低层的多片samples.Flaw检测在飞机和压力容器结构进行了讨论，我们最后展望的前景，使该技术得到广泛的应用。
We open with an account of early work on SQUID NDE, describing remote magnetometry and galvanometry, and the inverse problem. Then we concentrate on our own progress in mapping the magnetic fields produced by eddy-currents as flaws in conducting structures distort their flow. The Finite Element Method, the Volume Integral Method and other approaches to the problem of deducing flaw locations are reviewed. Next we turn to developments with high-TcSQUID systems, concentrating on ‘electronic gradiometers’ where the outputs of more than one SQUID are differenced to eliminate common mode fields. Flaws breaking test piece surfaces both near-side to the detector and far-side have been imaged. Moreover they have been detected also in the lower layers of multi-sheet specimens.Flaw detection in aircraft and pressure-vessel structures are discussed, and we end by looking at the prospects for bringing the technology into widespread use.