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αi => Incident angle for a specific refracted angle from snell's law. Eh => Height of the middle of the phased array probe – virtual emitting point. Pw => Ultrasound path in the wedge. Dw [μs] => Time-of-flight for specific angles in the wedges. Ii => The index point length is the distance from teh back – or front – of the wedge to the exit point of a specific angle. ω => Wedge angle. Hi => Height in the middle of the first element. Hw => Wedge height –back. βi => Refracted angle in the test material. p => Pitch. L1 => Distance from the middle of the first element to the emitting point. L2 => Distance from the emitting point to the intersection with the horizontal line – wedge contact surface. VW=> Ultrasound velocity in the wedge. VM=> Ultrasound velocity in the test material. |
Data size |
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KS => Number of samples per line – S-scan length. DL => Number of acquired lines. RS => Number of triggers – C-Scan length. IS => Inspection speed [mm/s]. SAR => Scan axis resolution [mm]. AR => Acquisition rate [B-scan/s]. |