scholarly journals Method of non-destructive testing of building structures

2020 ◽  
Vol 77 (3) ◽  
pp. 97-100
Keyword(s):  
Acoustic Emission ◽  
Working Conditions ◽  
Control Method ◽  
Schematic Diagram ◽  
Building Structures ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Ongoing Research ◽  
Preliminary Results ◽  
Non Destructive

The purpose of this article is to provide information about ongoing research with coverage of preliminary results. The characteristic of acoustic emission for determining defects and deformations in building structures and working conditions is given. A schematic diagram of the acoustic emission control method is presented.

scholarly journals Bearing defect diagnosis and acoustic emission

2003 ◽  
Vol 217 (4) ◽  
pp. 257-272 ◽  
Author(s):  
A Morhain ◽  
D Mba
Keyword(s):  
Acoustic Emission ◽  
Threshold Level ◽  
Diagnostic Methods ◽  
Non Destructive Testing ◽  
Test Rig ◽  
Destructive Testing ◽  
High Background ◽  
Bearing Defect ◽  
Non Destructive ◽  
Ae Counts

Acoustic emission (AE) was originally developed for non-destructive testing of static structures, but over the years its application has been extended to health monitoring of rotating machines and bearings. It offers the advantage of earlier defect detection in comparison with vibration analysis. However, limitations in the successful application of the AE technique for monitoring bearings have been partly due to the difficulty in processing, interpreting and classifying the acquired data. The investigation reported in this paper was centred on the application of standard AE characteristic parameters on a radially loaded bearing. An experimental test rig was modified such that defects could be seeded onto the inner and outer races of a test bearing. As the test rig was adapted for this purpose, it offered high background acoustic emission noise providing a realistic test for fault diagnosis. In addition to a review of current diagnostic methods for applying AE to bearing diagnosis, the results of this investigation validated the use of r. m. s., amplitude, energy and AE counts for diagnosis. Furthermore, this study determined the most appropriate threshold level for AE count diagnosis, the first known attempt.

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