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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