Title :
Multi-triggering and signal extraction for acoustic emissions monitoring
Author :
Lamonaca, F. ; Carni, Domenico Luca ; Carrozzini, Antonio ; Grimaldi, D. ; Olivito, Renato Sante
Author_Institution :
Dept. of Comput. Sci., Univ. of Calabria, Rende, Italy
Abstract :
Acoustic Emission (AE) testing is a common practice in the monitoring of aerospace structures. Multi-receiving transducers and multi-triggering acquisition modality are used in the continuous monitoring of AE to overcome the problems of signal loss and to reduce the storage memory. Nevertheless, the stored samples are related to both AE signal and noise. A further reduction of storage memory is proposed in the paper by discarding the noise samples. The goal is ensured by analysis procedure that: (i) extracts the AE signal samples in efficient manner, and (ii) establishes the stop acquisition in adaptive manner without a priori information about the length of the AE signal. Experimental tests assess the effectiveness of the proposed analysis procedure to monitor all the AE events occurring inside concrete specimens, and to reduce the storage memory.
Keywords :
acoustic emission testing; aerospace computing; aerospace testing; monitoring; signal detection; AE events; AE testing; acoustic emission testing; acoustic emissions monitoring; adaptive manner; aerospace structures; concrete specimens; multireceiving transducers; multitriggering acquisition modality; signal extraction; storage memory; Acoustic emission; Concrete; Hardware; Monitoring; Noise; Transducers; Vectors; Monitoring methodology Acoustic Emission; multi-triggering; non-destructive technique;
Conference_Titel :
Metrology for Aerospace (MetroAeroSpace), 2014 IEEE
Conference_Location :
Benevento
DOI :
10.1109/MetroAeroSpace.2014.6865954
