Rail Crack Identification Method Based on Differential Eddy Current Testing
-
摘要: 对于高速运行的铁路运输领域，铁轨缺陷的无损检测对保障铁路交通的安全运行至关重要。现有的无损检测技术已经基本可以实现裂纹缺陷的定位，但对于裂纹的特征，如长度、深度、延伸角度等，仍缺少有效的检测方法。应用差分涡流检测系统得到裂纹检测信号的幅值和相位变化信号，通过大量试验对不同长度、深度的缺陷样本进行了检测分析。试验得到了检测信号与裂纹特征之间的变化关系，进而研究了激励频率与分辨缺陷深度的关系，以及探头直径对缺陷长度分辨能力的影响。Abstract: In the field of high-speed rail transport, nondestructive testing of rail defects is essential to ensure the safety of railway traffic. The existing nondestructive testing technology can basically achieve the crack location, but there are still no effective detection methods for the characteristics of the crack, such as length, depth, extension angle, etc. In this paper, the differential eddy current testing system is used to obtain the amplitude and phase change of crack detection signals. Through a large number of experiments, defect samples with different length and depth are detected and analyzed. The relationship between the detection signal change and the crack characteristics is obtained. Furthermore, the relationship between the excitation frequency and the ability to resolve the defect depth is studied, and the influence of the probe diameter on the resolution of the defect length is investigated.
-
Keywords:
- eddy current testing /
- IQ demodulation /
- crack characteristics
-
-
[1] 王雪梅. 无损检测技术及其在轨道交通中的应用[M].成都:西南交通大学出版社, 2010. [2] 赵扬, 陈建伟, 孙继华,等. 在役钢轨无损检测技术与系统的应用与发展[J]. 无损检测, 2014, 36(3):58-64. [3] 张玉华, 罗飞路, 白奉天,等. 涡流检测缺陷定量评估的研究[J]. 无损检测, 2004, 26(11):575-579. [4] 王平, 丁松, 田贵云,等. 高速铁路钢轨电磁检测试验[J]. 无损检测, 2010,32(11):829-832. [5] 黄凤英, 高东海, 丁兴和. 道岔尖轨表面缺陷检测卡片式涡流传感器的设计与应用[J]. 无损检测, 2014, 36(2):63-66. [6] 黄凤英. 钢轨表面裂纹涡流检测定量评估方法[J]. 中国铁道科学, 2017, 38(2):28-33. [7] GARCÍA M J, GÓMEZ G J, VÁZQUEZ S E. Non-destructive techniques based on eddy current testing[J]. Sensors, 2011, 11(3):2525.
[8] 李贵娥, 麻红昭, 沈家旗,等. 电涡流检测技术及影响因素分析[J]. 传感技术学报, 2009, 22(11):1665-1669. [9] XU P, HUANG S, ZHAO W. A new differential eddy current testing sensor used for detecting crack extension direction[J]. Ndt & E International, 2011, 44(4):339-343.
[10] LIU Z, KOFFMAN A D, WALTRIPp B C, et al. Eddy current rail inspection using AC bridge techniques[J]. Journal of Research of the National Institute of Standards and Technology, 2013, 118(8):140-149.
[11] THOMAS H, DEY A, HEYDER R. Eddy current test method for early detection of rolling contact fatigue (RCF) in rails[J]. Insight:Non-Destructive Testing and Condition Monitoring, 2010, 52(52):361-365.
计量
- 文章访问数: 2
- HTML全文浏览量: 0
- PDF下载量: 2
下载:
