ToF-Based Excitation and Damage Localization in a Steel Plate Using Ultrasonic Guided Waves with Predefined Pseudo-Sensor Triplets
2026 11th International Conference on Recent Advances in Air and Space Technologies (RAST), İstanbul, Türkiye, 13 - 15 Mayıs 2026, ss.1-5, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Doi Numarası: 10.1109/rast69551.2026.11672596
- Basıldığı Şehir: İstanbul
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.1-5
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
Time-of-flight (ToF) features derived from ultrasonic guided waves (UGWs) provide a practical and computationally efficient basis for rapid damage localization in plate-like structures. This study presents a compact MATLAB-based framework for single-damage localization. First, the direct actuator-to-sensor arrival time is estimated using envelope cross-correlation. Next, a secondary damage-scattered/reflected wave packet is isolated through time gating and envelope-based peak selection. Finally, the excitation point and the damage location are identified by nonlinear least-squares fitting. The method is demonstrated for three damage scenarios, each evaluated using a predefined triplet of sensor (node) locations. Localization is based on the classical elliptical constraint, in which the actuator-damage-sensor path length is matched to the measured travel distance of the scattered wave. The proposed framework maps each processing stage to established UGW/SHM concepts, including ToF estimation, signal windowing, and ellipse-based localization.