Acoustic emission monitoring using a polarimetric Single Mode optical fibre sensor

Wevers, Martine; Huffel, Sabine Van; Vandenplas, Steve; Papy, Jean Michel

doi:10.1504/ijmsi.2007.013869

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…In addition to birefringence, the optical fiber will also show a degree of polarization dependent loss, which causes an additional intensity loss of a specific polarization state upon interaction with an acoustic wave. The change in degree of polarization dependent loss is assumed to be limited [34].…”

Section: Sensing Principlementioning

confidence: 99%

A novel technique for acoustic emission monitoring in civil structures with global fiber optic sensors

Verstrynge

Pfeiffer

Wevers

2014

Smart Mater. Struct.

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The application of Acoustic Emission (AE)-based damage detection is gaining interest in the field of civil structural health monitoring. Damage progress can be detected and located in real time and the recorded acoustic emissions hold information on the fracture process which produced them. One of the drawbacks for on-site application in large-scale concrete and masonry structures is the relatively high attenuation of the ultrasonic signal, which limits the detection range of the AE sensors. Consequently, a large number of point sensors are required to cover a certain area. To tackle this issue, a global damage detection system, based on acoustic emission detection with a polarization-modulated, single mode fiber optic sensor (FOS), has been developed. The sensing principle, data acquisition and analysis in time and frequency domain are presented. During experimental investigations, this acoustic emission fiber optic sensor is applied for the first time as a global sensor for detection of crack-induced acoustic emissions in a full-scale concrete beam. Damage progress is monitored during a cyclic four-point bending test and the AE activity, detected with the FOS, is related to the subsequent stages of damage progress in the concrete element. The results obtained with the AE-FOS are successfully linked to the mechanical behavior of the concrete beam and a qualitative correspondence is found with AE data obtained by a commercial system.

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Section: Sensing Principlementioning

confidence: 99%

A novel technique for acoustic emission monitoring in civil structures with global fiber optic sensors

Verstrynge

Pfeiffer

Wevers

2014

Smart Mater. Struct.

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Research and Calculation of the Interference Structure Parameters in the Cross Section of a Diffraction-Bounded Laser Beam

Bashkov

Zaikov

Khon

et al. 2021

Current Problems and Ways of Industry Development: Equipment and Technologies

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Monitoring Melting Ice Formations in Aircraft Fuel Tank by Acoustic Emission

Pfeiffer¹

2023

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">Considerable amounts of water accumulate in aircraft fuel tanks due to condensation of vapor during flight or directly during fueling with contaminated kerosene. This can result in a misreading of the fuel meters. In certain aircraft types, ice blocks resulting from the low temperatures at high altitude flights or in winter time can even interfere with the nozzles of the fuel supply pipes from the tanks to the engines. Therefore, as part of the maintenance operations, water has to be drained in certain intervals ensuring that no remaining ice is present. In the absence of an established method for determining residual ice blocks inside, the aircraft operator has to wait long enough, in some cases too long, to start the draining procedure, leading potentially to an unnecessary long ground time. A promising technology to determine melting ice uses acoustic signals generated and emitted during ice melting. With acoustic emissions, mainly situated in the ultrasonic frequency range, a very high number of events can be recorded to characterize stress relaxation processes that occur during conversions from ice to water. In the present paper, in addition to the case of the fuel tank, the icing of a fuselage panel is also considered. The results obtained provide evidence that it is possible to determine the moment when all ice has melted. However, it is not possible to give exact figures on the amount of ice remaining or melted, which is not a limitation in practice.</div></div>

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Acoustic emission monitoring using a polarimetric Single Mode optical fibre sensor

Cited by 3 publications

References 13 publications

A novel technique for acoustic emission monitoring in civil structures with global fiber optic sensors

A novel technique for acoustic emission monitoring in civil structures with global fiber optic sensors

Research and Calculation of the Interference Structure Parameters in the Cross Section of a Diffraction-Bounded Laser Beam

Monitoring Melting Ice Formations in Aircraft Fuel Tank by Acoustic Emission

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