An Empirical Study on Transmission Beamforming for Ultrasonic Guided-Wave Based Structural Health Monitoring

Area of Science:

• Engineering
• Materials Science
• Non-destructive Testing

Background:

• Structural health monitoring (SHM) is shifting towards condition-based maintenance for improved safety and efficiency.
• Ultrasonic guided waves are effective for monitoring large, thin-walled structures.
• Traditional beamforming for SHM is often post-processing (receiver-based) due to hardware complexity.

Purpose of the Study:

• To introduce and empirically characterize an electronic SHM system capable of transmission beamforming.
• To investigate the feasibility of simultaneous ultrasonic guided wave emission and reception for SHM.
• To evaluate the performance of transmission beamforming in monitoring an aluminum plate.

Main Methods:

• Development of an electronic SHM system for simultaneous ultrasonic guided wave transmission and reception.
• Implementation of transmission beamforming using multiple transducers.
• Empirical characterization of the transmission beamforming technique on an aluminum plate.

Main Results:

• Achieved high signal-to-noise ratio in experimental results.
• Demonstrated accurate angular precision of the physical signal.
• Validated the effectiveness of transmission beamforming for SHM.

Conclusions:

• Transmission beamforming offers a viable alternative to receiver beamforming for SHM.
• This technique can significantly enhance the reliability and robustness of SHM systems.
• The developed system shows promise for real-world applications in noisy environments.