Efficient ultrasonic phased array focused wave imaging using retrospective encoding and p-th root wavenumber-domain...

Area of Science:

• Materials Science & Engineering
• Physics
• Signal Processing

Background:

• Ultrasonic phased array imaging is crucial for industrial non-destructive testing (NDT).
• Conventional methods offer limited spatial resolution and high computational costs.
• Existing techniques like RE фокусис and TFM have limitations in efficiency and noise suppression.

Purpose of the Study:

• To develop an efficient and high-quality imaging approach for ultrasonic phased array NDT.
• To overcome the limitations of conventional focused wave imaging and TFM.
• To enhance computational efficiency and image quality in NDT applications.

Main Methods:

• Proposed a novel framework termed retrospective encoding and pth root wavenumber-domain reconstruction (REpRWD).
• Utilized RE фокусис to recover localized full matrix capture (FMC) datasets from focused transmissions.
• Introduced a nonlinear pth root wavenumber-domain (pRWD) algorithm for image reconstruction.

Main Results:

• REpRWD demonstrated substantially improved computational efficiency compared to existing methods.
• The performance advantage of REpRWD increases with higher reconstruction pixel counts.
• Achieved superior image quality, with improved accuracy in defect localization and characterization.

Conclusions:

• REpRWD offers a practical and powerful imaging technique for ultrasonic phased array NDT.
• The method enhances signal-to-noise ratio while maintaining low computational complexity.
• This approach provides a new pathway for high-quality ultrafast phased array imaging.