Enhancement in Defect Detection, Location and Sizing in Hollow Axis Rotors, an Innovative Method to Improve Ultrasonic Image Quality: the Multi-SAFT & Multi-Probe Approach.

Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006) Pub Date : 2006-04-29 DOI:10.1109/IST.2006.1650796

E. Pignone, P. Stanchi

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Abstract

In this work an innovative system for the non- destructive testing of rotors of turbine is proposed. It allows to identify, to size and to classify discontinuities located inside the volume of the inspectable material. Starting by a data set acquired by UT probes with different angle beams and from different measurement points, the defects of the inspected material are detected and the relative acoustic images are created by applying the multi-SAFT technique. The advantages of this technique lies in the increasing of the detection capability for small discontinuities and in a great precision in the defect location and sizing. By means of this approach, acoustic images representing the detected defects are obtained with high quality. This improvement is mainly due to the spatial and temporal correlations of the measures. The evaluation of the capability of the new system are assessed by means of several experimental results. In particular, the accuracy of the detection is evaluated in terms of the signal-to-noise ratio and of the obtained azimuth/range spatial resolution.

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提高中空轴转子缺陷检测、定位和定形的创新方法:多saft和多探头方法。

本文提出了一种新型的涡轮转子无损检测系统。它允许识别，尺寸和分类位于可检测材料的体积内的不连续性。以不同角度光束的UT探头从不同测量点采集的数据集为起点，利用多重saft技术检测被检材料的缺陷，并生成相对的声图像。该技术的优点在于提高了对小的不连续点的检测能力，并且在缺陷的定位和尺寸上具有很高的精度。通过这种方法，可以获得高质量的声图像来表示检测到的缺陷。这种改善主要是由于测量的空间和时间相关性。通过几个实验结果对新系统的性能进行了评价。特别是，检测的准确性是根据信噪比和获得的方位/距离空间分辨率来评估的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)

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