Research Article
Mode Selection Model for Rail Crack Detection Based on Ultrasonic Guided Waves
Table 9
Detection mode of all cracks.
| | Crack area | Crack tend | Frequency (kHz) | Mode number |
| | Area I | Transverse | 60 | 7 | | Vertical | | Longitudinal | | Oblique | | Area II | Transverse | | Vertical | | Longitudinal | | Oblique |
| | Area III | Transverse | 60 | 3 | | Vertical | | Longitudinal | | Oblique | | Area IV | Transverse | | Vertical | | Longitudinal | | Oblique |
| | Area V | Transverse | 60 | 6 | | Vertical | | Longitudinal | | Oblique |
| | Area VI | Transverse | 30 | 4 | | Vertical | | Longitudinal | 60 | 4 | | Oblique |
| | Area VII | Transverse | 60 | 1 | | Vertical | | Longitudinal | | Oblique |
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