Journal ArticleDOI
Acoustic-emission source location in two dimensions by an array of three sensors
TLDR
In this article, a general method of calculating the location of defects in two dimensions from the arrival times at the sensors is presented. But the ACEMAN system, which uses this method can derive the resolution properties of a sensor array in about 7.5 min.Abstract:
Sensors on the surface of a material under stress can detect acoustic emissions from a defect within the material. The difference in time of detection of an emission from the defect at different sensors gives a way of finding where it is. This paper shows a general method of calculating the location of defects in two dimensions from the arrival times at the sensors. The ACEMAN system, which uses this method can derive the resolution properties of a sensor array in about 7.5 min.read more
Citations
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Journal ArticleDOI
Acoustic source localization.
TL;DR: After reviewing various techniques the paper concludes which source localization technique should be most effective for what type of structure and what the current research needs are.
Journal ArticleDOI
Wavelet analysis of plate wave propagation in composite laminates
Hyunjo Jeong,Young-su Jang +1 more
TL;DR: In this article, the wavelet transform using the Gabor wavelet is applied to the time-frequency analysis of dispersive plate waves, and it is shown that the peaks of the magnitude of WT in the timefrequency domain are related to the arrival times of group velocity.
Journal ArticleDOI
A new algorithm for acoustic emission localization and flexural group velocity determination in anisotropic structures
Francesco Ciampa,Michele Meo +1 more
TL;DR: In this paper, the authors presented a new in situ Structural Health Monitoring (SHM) system able to identify the location of acoustic emission (AE) sources due to low-velocity impacts and to determine the group velocity in complex composite structures with unknown lay-up and thickness.
Journal ArticleDOI
Impact detection in anisotropic materials using a time reversal approach
Francesco Ciampa,Michele Meo +1 more
TL;DR: In this paper, an in situ imaging method is presented to detect the impact source location in reverberant complex composite structures using only one passive sensor, which can be used for real-time impact detection.
Journal ArticleDOI
A critical analysis of effectiveness of acoustic emission signals to detect tool and workpiece malfunctions in milling operations
Iulian Marinescu,Dragos Axinte +1 more
TL;DR: In this article, acoustic emission (AE) has been employed for tool condition monitoring of continuous machining operations (e.g. turning, drilling), but relatively little attention has been paid to monitor interrupted processes such as milling and especially to detect the occurrence of possible surface anomalies.
References
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Journal ArticleDOI
A multichannel acoustic emission monitoring system with simultaneous multiple event data analyses
TL;DR: In this paper, a multichannel acoustic emission monitoring system has been developed, which possesses high sensitivity for the sound pressure level of the emission and is concerned with the frequency selection to overcome various background noise disturbances.