Understanding Acoustic Emission Testing- Reading 1 Part B-A

Defect location — By using a number of transducers to monitor acoustic
emission events, and determining the time differences between the detection
of each event at different transducer positions, the location of the acoustic
emission event may be determined by using triangulation techniques. Work
by Maji and Shah, for instance, has indicated that this technique may be
accurate to within about 5 mm.
Analysis of the wave-form— Most recently, it has been suggested that an
elaborate signals processing technique (deconvolution - 反 褶 积 ) applied to the
wave-form of an acoustic emission event can provide information regarding
the volume, orientation, and type of microcrack. Ideally, since all of these
methods of data analysis provide different information, one would wish to
measure them all. However, this is neither necessary nor economically
feasible. In the discussion that follows, it will become clear that the more
elaborate methods of analysis are useful in fundamental laboratory
investigations, but may be inappropriate for practical applications.
Charlie Chong/ Fion Zhang