Acoustic emission testing (AT) - LEVEL II

Acoustic emission (AT) or pressure wave emission is a phenomenon of tense waves generated in solid bodies when deformed.

The processes in crystals and crystal assemblies should be considered the main source of acoustic emissions. Micro and macro fractures can occur. The resulting tense wave pulses, depending on the material, have a wide frequency range ranging from tens to hundreds of megahertz.

Modern Acoustic emission complexes can:

• record only signals that exceed the specified sensitivity levels;
• record the exact occurrence time of the acoustic emission;
• automatically calibrate sensors and run a self-diagnostic protocol;
• assess the speed at which defects develop;
• measure the tense-deformed state of objects, monitor the magnitude and nature of the load (in tensometer mode);
• detect and quantify the leakage of the working environment (liquid or gaseous).
• soundproofing acoustic emission systems are widely used to control the leakproofness of stop-and-control fittings, tanks, heat exchange and other devices. Volume and zonal, planar and linear positioning may be provided for better determination of the coordinates of defects. Even if the object is spherical, conical or cylindrical shape;
• assess vibration levels and perform statistical and spectral analysis (vibration meter mode);
• visually display elements of the research structures – storage tanks, tubes, welds, etc;
• record current technological parameters when surveying facilities in use;
• automatically log events, including receiving acoustic emission signals and commands from the operator. Information from the acoustic emission system can be transmitted in real time to the monitoring and diagnostic center for the technical condition of the hazardous production facility;
• automatically discard false sources of AE signals;
• display data in oscillography mode, create visual color graphics and histograms.

TUV NORD Baltik invites anyone wishing to undergo Acoustic emission testing (AT) and qualify in one or more industrial and production sectors to one of the qualification levels.

NOTE: to learn AT, we strongly recommend studying UT-ll.