电磁轨道检测中的多频最小二乘解调方法

2013 IEEE International Conference on Imaging Systems and Techniques (IST) Pub Date : 2013-10-01 DOI:10.1109/IST.2013.6729722

R. Zheng, Ze Liu, Yingfei Lu, Lixiong Zhu, Xiufang Sun

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引用次数: 3

摘要

随着铁路网络高速、重载的发展，钢轨缺陷问题日益严重。本文介绍了用最小二乘法(LSM)解调电磁轨道涡流检测中多频信号的方法。LSM的解调速度比其他方法快，因为它可以用一次矩阵计算来估计频率。而且其计算复杂度比FFT和快速相关等其他解调方法要小。因此，该方法可以在不降低解调精度的前提下提高解调速度。该算法可作为在线实时多频电磁轨道检测的理想解调算法。

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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Multi-frequency least squares demodulation method in electromagnetic rail inspection

As a result of the development of higher speed and heavier load of rail networks, rail defects have been more serious than ever before. This paper introduces the least squares method (LSM) to demodulate multi-frequency signals in electromagnetic rail inspection using eddy current detection. The demodulation speed of LSM is faster than other methods because it can estimate frequencies with one time matrix calculation. Furthermore, its calculation complexity is less than other demodulation methods like FFT and fast correlation. Consequently, this method can improve the demodulation speed without decrease the demodulation accuracy. And it will be used as ideal demodulation algorithm for online real time multi-frequency electromagnetic rail inspection.

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2013 IEEE International Conference on Imaging Systems and Techniques (IST)

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