Journal ArticleDOI
Experimental Study on Directionality of Ultrasonic Wave Coupling Using Surface-Bonded Fiber Bragg Grating Sensors
Reads0
Chats0
TLDR
In this paper, the authors measured the coupled signal amplitudes in both forward and backward directions, when ultrasonic waves couple from a thin plate to an optical fiber and from an optical fibre to a plate.Abstract:
Recent studies demonstrated the potential of increasing the Lamb wave detection sensitivity of fiber Bragg grating (FBG) sensors by bonding the optical fiber away from the grating location, instead of the conventional method of bonding the FBG directly. The FBG located at a remote location further along the optical fiber collects the guided traveling wave in the optical fiber generated from the Lamb wave signal. This remote bonding method could potentially be extended to a series of multiplexed FBGs. However, previous experiments also detected coupling to guided traveling waves in both directions in the optical fiber, which could have significant effects on multiplexed signals. In this paper, we measure the coupled signal amplitudes in both forward and backward directions, when ultrasonic waves couple from a thin plate to an optical fiber and from an optical fiber to a thin plate. The forward- and backward-induced modes are measured in both the optical fiber and the plate. The same experiment is then performed for the case when ultrasonic signal is coupled from the optical fiber to the plate. In addition, two different types of bonding, cyanoacrylate adhesive and frictional bond, are explored to investigate how the signal conversion depends on the bonding method. The results demonstrate that the coupling of ultrasonic waves from a thin structure to an optical fiber and from an optical fiber to the structure is complex. The coupling does not only occur in the direction of the wave propagation, but can be coupled into both forward and backward modes, depending on the bonding configuration used.read more
Citations
More filters
Journal ArticleDOI
Ultrasonic Structural Health Monitoring Using Fiber Bragg Grating.
Qi Wu,Yoji Okabe,Fengming Yu +2 more
TL;DR: In this review, the mature techniques of FBG-based ultrasonic sensors and their practical applications in ultrasonic structural health monitoring are discussed and state-of-the-art techniques are introduced to fully present the current developments.
Journal ArticleDOI
Partial Discharge Ultrasound Detection Using the Sagnac Interferometer System.
TL;DR: An optical fiber Sagnac interferometer system for partial discharge ultrasound detection and optical fiber sensing and time-frequency analysis of the ultrasonic signals excited by the piezoelectric ultrasonic transducer is realized for the first time.
Journal ArticleDOI
An ultrasonic visualization system using a fiber-optic Bragg grating sensor and its application to damage detection at a temperature of 1000 °C
TL;DR: In this article, the authors developed a laser ultrasonic visualization system with a heat-resistant fiber-optic Bragg grating (FBG) sensing configuration, which enabled clear damage identification at temperatures as high as 1000°C.
Journal ArticleDOI
Optical Fiber Sensors for Ultrasonic Structural Health Monitoring: A Review.
TL;DR: In this paper, the authors highlight the physics of the wave coupling to the optical fiber and explain the different phenomena such as directional sensitivity and directional coupling of the signal, and identify the encouraging trends and future areas where the field is expected to develop.
Journal ArticleDOI
Linear Damage Localization in CFRP laminates Using One Single Fiber-Optic Bragg Grating Acoustic Emission Sensor
Fengming Yu,Yoji Okabe +1 more
TL;DR: In this paper, a linear source localization method for acoustic emission (AE) detection in carbon fiber reinforced plastic (CFRP) laminates is proposed. But the method is not suitable for non-destructive inspection (NDI) applications.
References
More filters
Journal ArticleDOI
Tuned Lamb-Wave Excitation and Detection with Piezoelectric Wafer Active Sensors for Structural Health Monitoring
TL;DR: In this paper, the capability of embedded piezoelectric wafer active sensors (PWAS) to excite and detect tuned Lamb waves for structural health monitoring is explored.
Journal ArticleDOI
Structural Damage Location with Fiber Bragg Grating Rosettes and Lamb Waves
TL;DR: In this article, a damage detection and damage localization system based on fiber Bragg grating sensors is presented, which is used to detect and locate damage in structures such as those found in aerospace applications.
Journal ArticleDOI
Low energy impact damage monitoring of composites using dynamic strain signals from FBG sensors - Part I: Impact detection and localization
TL;DR: In this paper, the authors presented a method for the localization of an impact and identification of an eventual damage using dynamic strain signals from fiber Bragg grating (FBG) sensors.
Journal ArticleDOI
Acoustic emission measurement using a strain-insensitive fiber Bragg grating sensor under varying load conditions.
Hiroshi Tsuda,Eiichi Sato,Tomio Nakajima,Hideyuki Nakamura,Takahiro Arakawa,Hideyuki Shiono,Masashi Minato,Hideyuki Kurabayashi,Akiyoshi Sato +8 more
TL;DR: The FBG sensor was demonstrated to have comparable AE detection capability to piezoelectric sensors and showed resonant characteristics and could detect AE continuously during the test.
Reference EntryDOI
Fiber Bragg Grating Sensors
TL;DR: In this paper, the spectral properties of optical fiber Bragg gratings and their response to applied strain and temperature fields are derived for structural health monitoring applications, and common approaches to invert the spectral response of an optical fiber grating subjected to a complex strain field are also reviewed.
Related Papers (5)
Ultrasonic Structural Health Monitoring Using Fiber Bragg Grating.
Qi Wu,Yoji Okabe,Fengming Yu +2 more