Acoustic Guided Wave Testing of Pipes of Small Diameters

International Scientific-Practical Conference: Innovations in Fuel and Energy Complex and Mechanical Engineering 2017

能源学;机械制造

Muravev, V.V.^1 ; Muraveva, O.V.^1 ; Strizhak, V.A.^1 ; Myshkin, Y.V.^1

Department of Quality Control Instruments and Techniques, Kalashikov Izhevsk State Technical University, 7 Studencheskaya st., Izhevsk

426069, Russia^1

关键词: Acoustic path;    Corrosion damage;    Guided wave testing;    Local defects;    Main parameters;    Multiple reflections;    Shadow method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/253/1/012001/pdf
DOI  :  10.1088/1757-899X/253/1/012001

来源: IOP

【 摘 要 】

Acoustic path is analyzed and main parameters of guided wave testing are substanti- ated applied to pipes of small diameters. The method is implemented using longitudinal L(0,1) and torsional T(0,1) waves based on electromagnetic-acoustic (EMA) transducers. The method of multiple reflections (MMR) combines echo-through, amplitude-shadow and time-shadow methods. Due to the effect of coherent amplification of echo-pulses from defects the sensitivity to the defects of small sizes at the signal analysis on the far reflections is increased. An oppor- tunity of detection of both local defects (dents, corrosion damages, rolling features, pitting, cracks) and defects extended along the pipe is shown.