Abstract
Fiber Bragg grating (FBG)-based acoustic emission (AE) detection and monitoring is considered as a potential and emerging technology for structural health monitoring (SHM) applications. In this paper, an overview of the FBG-based AE monitoring system is presented, and various technologies and methods used for FBG AE interrogation systems are reviewed and discussed. Various commercial FBG AE sensing systems, SHM applications of FBG AE monitoring, and market potential and recent trends are also discussed.
Highlights
Potential for continuous real-time monitoring owing to their accuracy in carrying information, invulnerability to different types of interferences, reliability and versatility, small size and lightweight, high bandwidth, robustness and resistance against harsh environments, high sensitivity, ability to sense several parameters, chemical inertness, biocompatibility, and ability to be integrated into the system [17,18,19].Optical fibre sensors (OFS) have their applications in various fields such as structural health monitoring (SHM), seismic monitoring, transformer partial discharge diagnosis, underwater acoustic monitoring, aerospace safety, airborne acoustic detection, photoacoustic spectroscopy, photoacoustic imaging and other such fields [20,21]
This review provides the current landscape of the various Fiber Bragg grating (FBG)-based technologies for acoustic emission (AE) detection and its advantages and pitfalls
The interrogation system for FBGs plays an important role in measurand parameters such as sensitivity and range as it extracts the measurand information from the optical signals collected from the sensor heads
Summary
Potential for continuous real-time monitoring owing to their accuracy in carrying information, invulnerability to different types of interferences, reliability and versatility, small size and lightweight, high bandwidth, robustness and resistance against harsh environments, high sensitivity, ability to sense several parameters (strain, pressure, corrosion, temperature, and acoustic signals), chemical inertness, biocompatibility, and ability to be integrated into the system [17,18,19].OFSs have their applications in various fields such as SHM, seismic monitoring, transformer partial discharge diagnosis, underwater acoustic monitoring, aerospace safety, airborne acoustic detection, photoacoustic spectroscopy, photoacoustic imaging and other such fields [20,21].
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