C9-a3 - Experimental study of Baker Coded Ultrasonic Signal for Coarse-Grained Material Testing
- Event
- 2025 ICU PADERBORN - 9th International Congress on Ultrasonics
2025-09-21 - 2025-09-25
Paderborn - Band
- Lectures
- Chapter
- C9-a - NDT and NDE Transducers
- Author(s)
- M. Yang, K. Wang, Y. Zhou, W. Wang - Institute of Acoustics, Beijing (China)
- Pages
- 215 - 218
- DOI
- 10.5162/Ultrasonic2025/C9-a3
- ISBN
- 978-3-910600-08-9
- Price
- free
Abstract
Ultrasonic testing of coarse-grained materials is affected by scattering noise. We propose a hardware-friendly Barker modulation (0/1 amplitude) that conserves resources. Experiments on the specimens (1.0 mm grain size) show that, despite the probe frequency being 500 kHz, the bottom echo signal-to-noise ratio (SNR) reaches its peak at 350 kHz, yielding a 2.53 dB SNR gain compared to traditional pulse-echo methods; the impact of surface reflections on the filtered signal is negligible. Future work will focus on Golay codes to detect flaws.