Experimental and simulation study demonstrates enhanced defect imaging via amplitude compensation and optimized sampling, indicating more efficient non-destructive evaluation workflows.
Key Points
To improve volumetric defect detection and inspection efficiency in three-dimensional laser diffuse ultrasonic phased array imaging by correcting signal amplitude decay and optimizing sensor reception sampling.
Applied a time-domain amplitude compensation method to raw ultrasound signals to counteract attenuation-driven signal decay.
Evaluated square, hexagonal, and Poisson-disk reception sampling layouts to minimize necessary data acquisition points.
Validated the reconstruction workflow using both numerical simulation data and experimental ultrasonic phased array measurements.
Enhanced defect image quality by achieving greater than a 2 dB improvement in signal-to-noise ratio after amplitude compensation.
Relaxed the reception sampling pitch down to one acoustic wavelength across optimized layouts without degrading defect image fidelity.