A novel short fiber Bragg grating accelerometer based on a V-type dual mass block structure for low- and medium-frequency vibration measurements

Le, Hoang-Dang; Chiang, Chia‐Chin; Nguyen, Chi-Ngon; Hsu, Hsiang-Cheng

doi:10.1016/j.optlastec.2023.109131

Cited by 14 publications

(1 citation statement)

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“…Although they achieved promising results, limitations were related to external environmental noises, which can influence the collected measurements, as well as the sensor bandwidth, which is capable of monitoring only low frequencies, being susceptible to failure in mediumand high-frequency measurements. Nevertheless, new developments in FBG-based OFA prototypes were achieved to approach these issues and optimize their performance, such as in the case of the work reported by Le et al, where an FBG-based OFA capable of monitoring low and medium frequencies was developed [53]. Also, OFAs can be based on different optical technologies, such as Fabry-Perot interferometry, as Kim et al proposed, where the natural frequency shift was studied as a function of thickness variation in a low alloy steel piping elbow [54].…”

Section: Able To Indicate Damage In Buried Pipelinesmentioning

confidence: 99%

FBG-Based Accelerometer for Buried Pipeline Natural Frequency Monitoring and Corrosion Detection

Pereira,

Sousa,

Mesquita

et al. 2024

Buildings

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Pipelines are structures with great relevance in different industrial sectors and are essential for the proper functioning of the logistics that support today’s society. Due to their characteristics, locations, and continuous operation, allied with the huge network of pipelines across the world, they require specialized labor, maintenance, and adequate sensing systems to access their proper operation and detect any damage they may suffer throughout their service life. In this work, a fiber Bragg grating (FBG)-based optical fiber accelerometer (OFA), which was designed and calibrated to operate through wavelength and optical power variations using different interrogation setups, was fixed together with a pair of FBG arrays along a 1020 carbon steel pipeline section with the objective of monitoring the pipeline natural frequency (fn_pipeline) to indirectly evaluate the detection and evolution of corrosion when this structure was buried in sand. Here, corrosion was induced in a small area of the pipeline for 164 days, and the OFA was able to detect a maximum fn_pipeline variation of 3.8 Hz in that period. On the other hand, the attached FBGs showed a limited performance once they could successfully operate when the pipeline was unburied, but presented operational limitations when the pipeline was buried in sand. This was due to the inability of the structure to vibrate long enough under these conditions and obtained data from these sensors were insufficient to obtain the fn_pipeline.

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Section: Able To Indicate Damage In Buried Pipelinesmentioning

confidence: 99%