文献类型：会议论文

英文题名：Multi-frequency Least Squares Demodulation Method in Electromagnetic Rail Inspection

作者：Zheng, Ran[1];Liu, Ze[1];Lu, Yingfei[1];Zhu, Lixiong[1];Sun, Xiufang[2]

第一作者：Zheng, Ran

通讯作者：Zheng, R[1]

机构：[1]Beijing Jiaotong Univ, Sch Elect & Informat Engn, Beijing, Peoples R China;[2]Beijing Union Univ, Sch Mechatron, Beijing, Peoples R China

第一机构：Beijing Jiaotong Univ, Sch Elect & Informat Engn, Beijing, Peoples R China

通讯机构：[1]corresponding author), Beijing Jiaotong Univ, Sch Elect & Informat Engn, Beijing, Peoples R China.

会议论文集：IEEE International Conference on Imaging Systems and Techniques (IST)

会议日期：OCT 22-23, 2013

会议地点：Beijing, PEOPLES R CHINA

语种：英文

外文关键词：least squares method; electromagnetic rail inspection; eddy current detection; multi-frequency demodulation

摘要：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.