Tuesday, January 24, 2017

Techshore Inspection Services : Ultrasound Testing Techniques - Pulse-Echo Testing




In pulse-echo testing, a transducer sends out a pulse of energy and the same or a second transducer listens for reflected energy (an echo).
Reflections occur due to the presence of discontinuities and the surfaces of the test article.

The amount of reflected sound energy is displayed versus time, which provides the inspector information about the size and the location of features that reflect the sound.


Digital display showing signal generated from sound reflecting off back surface

Digital display showing the presence of a reflector midway through material, with lower amplitude back surface reflector.

The pulse-echo technique allows testing when access to only one side of the material is possible, and it allows the location of reflectors to be precisely determined.

Graph Interpretation: 






References:
www.ndt-ed.org
www.asnt.org


Relted blogs :


Documents : 


Additional references:
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