Electromagnetic Ultrasonic Shear-Horizontal Wave to Detect Corrosion Defect of Flat Steel for Grounding Device of Transmission Pole Tower

Detecting defects in grounded flat steel is essential for ensuring the safety and reliability of transmission tower grounding devices. However, traditional inspection methods, such as physical excavation verification, are costly time-consuming. This paper proposes a corrosion defect detection method devices based on electromagnetic ultrasonic SH waves. In addition, using commercial software, three-dimensional finite element simulation model with simulated pitting constructed. The specified displacements applied to multiple surface sources mimic horizontal shear vibrations generated by transducer during actual inspection. A was used investigate propagation attenuation characteristics shear-horizontal SH0guided waves various geometric configurations steel. investigated SH0 wave linear analysis results. results show that guided small, at only 0.0016 dB/mm, displacement amplitude echo signal decreases increase distance. Increasing depth length increases amplitude. At same time, width has little effect Finally, experiment conducted, experimental fit verify accuracy model. introduces new idea on-site quantitative identification steel, which significant reference value can provide more effective economical dependability