Automated Real-Time Eddy Current Array Inspection of Nuclear Assets.
Automated Real-Time Eddy Current Array Inspection of Nuclear Assets.
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DOI：
10.3390/s22166036
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发表时间：
2022-08-12
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影响因子：
--
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检测表面不连续的部件是体积无损检测（NDT）方法（如超声波和射线照相）在检测和表征方面的一个领域。再加上工业上希望在制造和/或维护时检测组件的表面破坏缺陷，以增加设计寿命并进一步将可持续性嵌入其商业模式，这推动了涡流检测（ECT）的采用。此外，随着企业向工业4.0迈进，对机器人交付NDT的需求也在增长。在这项工作中，作者提出了一种新的实现和使用的灵活的机器人细胞提供涡流阵列检查应力腐蚀开裂的核罐由1.4404不锈钢。在罐一侧的不同高度进行了三次180度扫描，并将获得的阻抗数据垂直缝合在一起，以显示裂纹的全部范围。轴向和横向数据集，对应于阵列元件的发射/接收线圈配置，同时采集在传输频率250，300，400和450 kHz，并允许生成几个阻抗C扫描图像。通过使用力-扭矩传感器、带衬垫的柔性ECT阵列和PI控制系统，创新性地将涡流阵列的提离变化降至最低。通过使用定制软件，阻抗数据被实时记录（7 ms），显示给用户，保存到二进制文件，并通过相位旋转和不同频率和线圈配置通道的阻抗数据的混合进行灵活的后处理。单独的相位旋转表明，在所有采集的数据集上，信噪比（SNR）平均增加了4.53分贝，而选择性求和和平均混合技术显示出SNR平均增加了1.19分贝。结果显示了涡流阵列的机器人交付和创新的后处理如何能够实现可重复和灵活的表面检测，适用于许多以质量为中心的行业所面临的挑战。
Inspection of components with surface discontinuities is an area that volumetric Non-Destructive Testing (NDT) methods, such as ultrasonic and radiographic, struggle in detection and characterisation. This coupled with the industrial desire to detect surface-breaking defects of components at the point of manufacture and/or maintenance, to increase design lifetime and further embed sustainability in their business models, is driving the increased adoption of Eddy Current Testing (ECT). Moreover, as businesses move toward Industry 4.0, demand for robotic delivery of NDT has grown. In this work, the authors present the novel implementation and use of a flexible robotic cell to deliver an eddy current array to inspect stress corrosion cracking on a nuclear canister made from 1.4404 stainless steel. Three 180-degree scans at different heights on one side of the canister were performed, and the acquired impedance data were vertically stitched together to show the full extent of the cracking. Axial and transversal datasets, corresponding to the transmit/receive coil configurations of the array elements, were simultaneously acquired at transmission frequencies 250, 300, 400, and 450 kHz and allowed for the generation of several impedance C-scan images. The variation in the lift-off of the eddy current array was innovatively minimised through the use of a force–torque sensor, a padded flexible ECT array and a PI control system. Through the use of bespoke software, the impedance data were logged in real-time (7 ms), displayed to the user, saved to a binary file, and flexibly post-processed via phase-rotation and mixing of the impedance data of different frequency and coil configuration channels. Phase rotation alone demonstrated an average increase in Signal to Noise Ratio (SNR) of 4.53 decibels across all datasets acquired, while a selective sum and average mixing technique was shown to increase the SNR by an average of 1.19 decibels. The results show how robotic delivery of eddy current arrays, and innovative post-processing, can allow for repeatable and flexible surface inspection, suitable for the challenges faced in many quality-focused industries.
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影响因子：
1.1
作者：
Mineo, C.;Vasilev, M.;Cross, E. J.
通讯作者：
Cross, E. J.
影响因子：
4.2
作者：
Holmes, C;Drinkwater, BW;Wilcox, PD
通讯作者：
Wilcox, PD
DOI：
10.5545/sv-jme.2010.173
发表时间：
2011-03-01
影响因子：
1.7
作者：
Mook, Gerhard;Michel, Fritz;Simonin, Jouri
通讯作者：
Simonin, Jouri
DOI：
10.1243/1464420011545058
发表时间：
2001-01-01
影响因子：
2.4
作者：
Cawley, P
通讯作者：
Cawley, P
影响因子：
8.4
作者：
Javadi, Yashar;Mohseni, Ehsan;Gachagan, Anthony
通讯作者：
Gachagan, Anthony