Variable Aperture Method of Ultrasonic Annular Array for the Detection of Addictive Manufacturing Titanium Alloy

Figure 9

Experimental setup of ultrasonic annular array detection system. (a) Main components of detection system. (b) Schematic of the dynamic focusing method using the annular array. (c) The 3D FEM model of acoustic beam propagation of annular array in double-layer medium.

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