Saw-wave excitation eddy-current NDE based on HTS RF SQUID
Saw-wave excitation eddy-current NDE based on HTS RF SQUID
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DOI：
10.1109/tasc.2003.816202
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发表时间：
2003-09-01
影响因子：
1.8
通讯作者：
Yoshizawa, M
中科院分区：
文献类型：
--
作者：
He, DF;Yoshizawa, M
采用高温超导体射频超导量子干涉仪、平面梯度仪作为传感器，研制了锯齿波激励涡流无损评价装置。通过分析样品响应信号中的谐波幅值，我们成功地检测到了铝板中的人工缺陷，并估计了缺陷的深度。我们还证明了构建缺损三维轮廓的可能性。在我们的数据处理程序中，我们使用了一种乘法方法来计算谐波的振幅，这比快速傅里叶变换快得多。在实验过程中，x-y工作台的移动、数据采集和数据处理可以同时进行。
Using a high-temperature superconductor radio frequency superconducting quantum interference, device planar gradiometer as the sensor, we developed a saw-tooth wave excitation eddy-current nondestructive evaluation device. By analyzing the amplitudes of harmonics in the response signal of the sample, we successfully detected the artificial defect in an aluminum plate and estimated the depth of the defect. We also demonstrated the possibility to construct the three-dimensional profile of a defect. In our program for data processing, we used a multiplying method to calculate the amplitudes of the harmonies, which was much faster than fast Fourier transform. During the experiment, the movement of x-y stage, data acquisition, and data processing could be done simultaneously.