When an electrical voltage is applied to PZT mounted on a plate-like target structure, guided waves are generated and propagate along the target structure. Then, the corresponding responses can be measured by the same PZT in a pulse–echo mode or by the other PZT in a pitch–catch mode.
What is guided wave ultrasonic testing?
Guided Wave Ultrasonics (GWUT) is a nondestructive examination technique that projects sound waves along pipe walls in order to detect corrosion or other damage. Guided wave ultrasonic testing is also sometimes referred to as long range ultrasonic testing (LRUT).
What is Gul testing?
Guided wave ultrasonic testing detects corrosion damage and other defects over long (10m-50m) distances in piping. A special tool (transducer ring) is clamped around the pipe and transmits guided waves in both directions along the pipe.
What is guided wave propagation?
Guided wave testing (GWT) is a non-destructive evaluation method. The method employs acoustic waves that propagate along an elongated structure while guided by its boundaries. This allows the waves to travel a long distance with little loss in energy.
What is the true definition of a wave?
A wave is a physical phenomenon characterized by its frequency, wavelength, and amplitude. In general, waves transfer energy from one location to another, in which case they have a velocity. ... Electromagnetic waves, such as light, do not require a medium and can travel through a vacuum.
How do guided waves work?
The method employs acoustic waves that propagate along an elongated structure while guided by its boundaries. This allows the waves to travel a long distance with little loss in energy. ... In addition, the underlying physics of guided waves is more complex than bulk waves.