Detecting acoustic-emission signals with fiber-optic interference transducers; Russian Journal of Nondestructive Testing; Vol. 53, iss.

Detecting acoustic-emission signals with fiber-optic interference transducers; Russian Journal of Nondestructive Testing; Vol. 53, iss.

Bibliografiska uppgifter
Parent link:Russian Journal of Nondestructive Testing
Vol. 53, iss..— 2017.— [P. ]-
Institutionell upphovsman: Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения
Övriga upphovsmän: Bashkov O. V. Oleg Viktorovich, Romashko R. V. Roman, Zaikov V. I., Panin S. V. Sergey Viktorovich, Bezruk M. N., Khun, Bashkov I. O.
Sammanfattning:Title screen
Results of the analysis of acoustic-emission signals generated due to ultrasonic waves propagating in a polymer composite material and registered with piezoelectric and fiber-optic sensors are presented. The fiber-optic sensors were arranged into an adaptive interferometer based on using a dynamic hologram formed in a photorefractive crystal. Reducing the setpoint fading has made it possible to improve the noise immunity and sensitivity of the measurement system when using an adaptive interferometer on a photorefractive crystal. Optical fibers in the interferometer’s measurement system served as sensors of ultrasonic waves and were built into a polymer composite material when the sample was manufactured. The sample was a rectangular plate made of a multilayer fiberglass material. It has been discovered that the sensitivity of the adaptive interferometer makes it possible to detect acoustic- emission signals generated by a Hsu–Nielsen source. When determining the speed of sound in the polymer composite material, peculiarities of registering a group wave by fiber-optic sensors have been established that are due to the anisotropy of the medium the wave propagates in and the distributed character of sensor placement in the studied composite material. The wavelet transform has been used to separate the informative component of the wanted signal.
Режим доступа: по договору с организацией-держателем ресурса
Språk:engelska
Publicerad: 2017
Ämnen:
электронный ресурс
труды учёных ТПУ
волоконно-оптические датчики
акустическая эмиссия
пьезоэлектрические преобразователи
адаптивные интерферометры
фоторефрактивные кристаллы
полимерные композиты
Länkar:https://doi.org/10.1134/S1061830917060031
Materialtyp: Elektronisk Bokavsnitt
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=657936

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