Structural health monitoring of composite wind blades by fiber bragg grating

Guo, Zhansheng; Zhang, Junqian; Hu, Hongjiu; Guo, Xingming

doi:10.1117/12.779233

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…FBGs utilized as wind turbine blade load sensors, based on strain measurements in wind turbine blades, have been published in several papers, 1,3,5,[24][25][26][27][28] and the technology is proven to be capable of measuring the maximum loads on wind turbine blades with the required resolution. Comparison of FBGs and standard electrical strain-gauges has been done on a small wind turbine blade.…”

Section: Fiber-bragg Gratings As Wind Turbine Load Sensorsmentioning

confidence: 99%

Fiber-optical grating sensors for wind turbine blades: a review

Glavind¹,

Olesen²,

Skipper³

et al. 2013

Opt. Eng

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Abstract. With the rapid growth of wind turbines and focus on maintenance costs structural measurements are becoming essential. Fiberoptical sensors have physical properties that make them suitable for embedding in wind turbine blades, such as small size and immunity to electrical interferences. Fiber-optical grating sensors can be utilized to provide important information regarding strain, temperature, and curvature of the blades, which can be applied in condition-monitoring to detect fatigue failure and furthermore for optimization of the production from the wind turbine. We provide an overview of the current status and a discussion on research and implementation of fiber Bragg gratings and long-period gratings in wind turbine blade sensors. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Fiber-bragg Gratings As Wind Turbine Load Sensorsmentioning

confidence: 99%

Fiber-optical grating sensors for wind turbine blades: a review

Glavind¹,

Olesen²,

Skipper³

et al. 2013

Opt. Eng

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“…FBG based strain measurement on wind turbines for load monitoring has been demonstrated in several papers [1,4,8,9,[36][37][38][39]. The sensor-systems reported are capable of providing a resolution of 1 µε with a dynamic range of ±5000 µε for structural information systems on wind turbine blades.…”

Section: Fibre Bragg Gratings For Sensing On Wind Turbine Bladesmentioning

confidence: 99%

Drug-Induced T-Wave Morphology Changesn

Shakibfar¹

2014

Drug-Induced T-Wave Morphology Changes

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“…The layered nature of fibre-reinforced plastic (FRP) materials allows the incorporation of sensors, such as piezoelectric wafer active sensors (PWAS) [ 1 ] or fibre-Bragg gratings (FBGs) [ 2 ]. Placing sensors within the structure gives the possibility of monitoring the structure continuously without adversely affecting the hydro- or aerodynamics nor having the sensors exposed to harsh environments [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Acoustic Emission Monitoring of Carbon Fibre Reinforced Composites with Embedded Sensors for In-Situ Damage Identification

Huijer

Kassapoglou

Pahlavan

2021

Sensors

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Piezoelectric sensors can be embedded in carbon fibre-reinforced plastics (CFRP) for continuous measurement of acoustic emissions (AE) without the sensor being exposed or disrupting hydro- or aerodynamics. Insights into the sensitivity of the embedded sensor are essential for accurate identification of AE sources. Embedded sensors are considered to evoke additional modes of degradation into the composite laminate, accompanied by additional AE. Hence, to monitor CFRPs with embedded sensors, identification of this type of AE is of interest. This study (i) assesses experimentally the performance of embedded sensors for AE measurements, and (ii) investigates AE that emanates from embedded sensor-related degradation. CFRP specimens have been manufactured with and without embedded sensors and tested under four-point bending. AE signals have been recorded by the embedded sensor and two reference surface-bonded sensors. Sensitivity of the embedded sensor has been assessed by comparing centroid frequencies of AE measured using two sizes of embedded sensors. For identification of embedded sensor-induced AE, a hierarchical clustering approach has been implemented based on waveform similarity. It has been confirmed that both types of embedded sensors (7 mm and 20 mm diameter) can measure AE during specimen degradation and final failure. The 7 mm sensor showed higher sensitivity in the 350–450 kHz frequency range. The 20 mm sensor and the reference surface-bounded sensors predominately featured high sensitivity in ranges of 200–300 kHz and 150–350 kHz, respectively. The clustering procedure revealed a type of AE that seems unique to the region of the embedded sensor when under combined in-plane tension and out-of-plane shear stress.

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Structural health monitoring of composite wind blades by fiber bragg grating

Cited by 9 publications

References 11 publications

Fiber-optical grating sensors for wind turbine blades: a review

Fiber-optical grating sensors for wind turbine blades: a review

Drug-Induced T-Wave Morphology Changesn

Acoustic Emission Monitoring of Carbon Fibre Reinforced Composites with Embedded Sensors for In-Situ Damage Identification

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