FBG-based strain monitoring and temperature compensation for composite tank

Liang, Zhihong; Liu, Debo; Wang, Xin; Zhang, Jian; Wu, Haiyan; Qing, Xinlin; Wang, Yishou

doi:10.1016/j.ast.2022.107724

Cited by 24 publications

(4 citation statements)

References 26 publications

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“…As shown in Figure 8b, the linear relationship between T and Δ D can provide the vital reference to the investigation of the temperature compensation technology of this sensor in the future. Then, the temperature compensation [31] based on the optical fibre sensing multiplexing technique could be a promising pathway for the industrial and commercial application in the future. Additionally, the research on shielding materials and the miniaturisation of the sensor will also be developed based on the MEMS technology.…”

Section: Characteristic Of the Sensormentioning

confidence: 99%

A passive optical fibre sensor based on Fabry‐Perot interferometry for bipolar electrostatic monitoring of insulating dielectrics

Zhang

Wang

et al. 2023

High Voltage

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The measurement of the surface charge on the insulating dielectrics is critical to estimate the insulation strength of electrical equipment in operation. Unavoidable interactions with the electromagnetic field, however, generally result in distortion measurement of active sensor. Thus, it is of great significance to investigate a passive sensor for monitoring the deposited charge. Here, a passive optical fibre electrostatic sensor is developed on the principle of Fabry–Perot interference to quantify the surface potential of the insulating dielectrics. The sensitivity of quantifying the electrostatic charge is explored in terms of the wavelength shift in the interference spectrum, and the linear correlation is 0.99. Meanwhile, the sensor can identify a negative quadratic trend with the increase of the surface roughness of the insulating dielectrics. The merits of the proposed sensor such as passive monitoring, bipolar electrostatic detection, and the excellent ability of anti‐electromagnetic interference are highlighted in the results. Hence, this sensor can serve as an effective tool to monitor the electrostatic charge in the fields of smart electrical equipment, fuel transportation, aerospace, integrate circuit etc.

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Section: Characteristic Of the Sensormentioning

confidence: 99%

A passive optical fibre sensor based on Fabry‐Perot interferometry for bipolar electrostatic monitoring of insulating dielectrics

Zhang

Wang

et al. 2023

High Voltage

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“…Wavelength division multiplexing (WDM) technology is used to realize the array network of FBG sensors for maximum efficiency in a single channel [21]. With WDM technology, multiple physical variables can be detected simultaneously using one channel.…”

Section: Sensor Package Design and Calibrationmentioning

confidence: 99%

“…Zhang et al [20] used FBG sensors to measure the strain response of solar aircraft from 153.15 K to 393.15 K but did not conduct thermal-mechanical coupling tests. Liang et al [21] used FBG sensors to measure the temperature and strain of composite tanks during a cryogenic test and put forward the demand for the accurate decoupling the double physical parameters.…”

Section: Introductionmentioning

confidence: 99%

Dual-FBG arrays hybrid measurement technology for mechanical strain, temperature, and thermal strain on composite materials

Liang,

Wang,

et al. 2023

Phys. Scr.

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This paper proposes a hybrid measurement method using dual-FBG arrays to monitor the mechanical strain, temperature, and thermal strain during spacecraft re-entry. This method effectively separates temperature and mechanical effects and enables the simultaneous measurement of three physical parameters. Four service temperatures applied by the spacecraft were simulated to illustrate the application prospects of the method, with the highest test temperature being 160 °C. Under the thermal non-steady state, the average absolute error of the temperature measurement between the dual-FBG and the thermocouple did not exceed 2.799 °C. Meanwhile, the dual FBG-based thermal strain calculation was compared with the thermally measured strain with a relative error of no more than 6.520%. A finite element model at different temperatures was developed to calculate mechanical responses and is compared with the results obtained by FBG. The results show significant agreement between the measurement and the simulation, with a maximum error of 3.61%. These results provide a reliable reference for measuring the thermal response of the spacecraft.

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“…Conventional electrical resistance, thermocouples, and strain gauges are relatively large, have poor temperature and pressure resistance, and lack multiplexing capabilities, although they can measure temperature and strain during the thermoforming process of the composite [9]. Various optical fiber sensors have been proposed to address these issues.…”

Section: Introductionmentioning

confidence: 99%

Temperature and strain monitoring during thermoforming of thermoplastic composite laminates using optical frequency domain reflectometry

Fan,

Chen,

et al. 2024

Smart Mater. Struct.

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In this study, optical frequency domain reflectometry (OFDR) was used to monitor the thermoforming processes of carbon fiber reinforced thermoplastics (CFRTPs) to address the limitations of conventional sensors including large size and low spatial resolution. A bare single-mode fiber with a polyimide coating and a fiber encapsulated by a long metal capillary were cascaded and embedded into composite laminates to withstand the high pressure and temperature during thermoforming, and then connected to the OFDR for monitoring. A fiber encapsulated by a 2 cm short metal capillary was also embedded to demonstrate that a 1 mm resolution of the OFDR is beneficial for reflecting the local change in the composite. After processing by wavelet denoising, signal extraction, and decoupling, the frequency shift along the optical fiber sensor was successfully converted to strain and temperature. In two repeated thermoforming experiments that involved cooling from 340 °C, the average temperature difference measured by the OFDR and reference thermocouple was only 4.64 °C. The strain measured by the OFDR and reference fiber Bragg grating (FBG) decreases in the cooling stage, and has a clear knee point of 250 °C when correlated with the temperature and strain. This knee point is consistent with the liquid–liquid transition temperature of the polyetherimide and indicates the beginning of consolidation when the composite changes its properties significantly. The average strain difference measured by OFDR and the reference FBG was 69 μϵ when the total strain is approximately 1820 μϵ if only considering the consolidation process from 250 °C. The results of 1 mm spatial resolution and high accuracy demonstrate that OFDR is a promising high-resolution sensing solution for the in-situ temperature and strain monitoring of the thermoforming of CFRTPs.

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FBG-based strain monitoring and temperature compensation for composite tank

Cited by 24 publications

References 26 publications

A passive optical fibre sensor based on Fabry‐Perot interferometry for bipolar electrostatic monitoring of insulating dielectrics

A passive optical fibre sensor based on Fabry‐Perot interferometry for bipolar electrostatic monitoring of insulating dielectrics

Dual-FBG arrays hybrid measurement technology for mechanical strain, temperature, and thermal strain on composite materials

Temperature and strain monitoring during thermoforming of thermoplastic composite laminates using optical frequency domain reflectometry

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