Inspection of rail track head surfaces using electromagnetic acoustic transducers (EMATs)

被引：19

作者：

Dixon, S ^{[1
]}

Edwards, RS ^{[1
]}

Jian, X ^{[1
]}

机构：

[1] Univ Warwick, Dept Phys, Ultrason Grp, Coventry CV4 7AL, W Midlands, England

来源：

INSIGHT | 2004年 / 46卷 / 06期

关键词：

D O I：

10.1784/insi.46.6.326.56379

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A 'pitch-catch' low-frequency wideband Rayleigh wave EMAT system has been developed that has been used for gauge corner cracking defect detection on the head of samples of rail track. Strictly speaking, the generated waves are a type of guided wave mode as the propagation surface is not a flat halfspace, and these waves propagate along the surface of the rail penetrating down to a depth of several millimetres. Crack depth can be estimated by measuring the relative amount of the Rayleigh wave at a, particular frequency that passes underneath the crack. The EMAT system also has the potential to assess the condition of the combined microstructure and stress state around the rail head by measuring accurately the velocity of the surface waves.

引用

页码：326 / 330

页数：5

共 14 条

[1]

Armitage PR, 2002, INSIGHT, V44, P369

[2] Enhancement of laser-ultrasound/electromagnetic-acoustic transducer signals from Rayleigh wave interaction at surface features [J].