A Miniaturized FBG Accelerometer Based on a Thin Polyurethane Shell

Wang, Jun; Zeng, Yujie; Lin, Chongyu; Hu, Zhengliang; Peng, Gang-Ding; Hu, Yongming

doi:10.1109/jsen.2015.2501983

Cited by 24 publications

(12 citation statements)

References 20 publications

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“…where P e is the effective elasto-optical coefficient and ε is the axial strain on the FBG. According to the principles of elastic and structural mechanics, the Eq.1 can be expressed as [19], [27]…”

Section: A the Theoretical Model Usedmentioning

confidence: 99%

“…Liu et al [18] proposed an elastic tube-based accelerometer using an FBG, showing a sensitivity of 63pm/G and resonant frequency of 376Hz. Wang et al [19] have proposed a miniaturized FBG accelerometer based on a shell design where the sensitivity achieved is 54pm/G and the resonant frequency 480Hz. In the work of Zhang et al [20], a compliant cylinder accelerometer was discussed where the sensitivity reported was 42.7pm/G and the resonant frequency 400Hz.…”

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confidence: 99%

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Design and Modeling of a High Sensitivity Fiber Bragg Grating-Based Accelerometer

Liu

Qiao

et al. 2019

IEEE Sensors J.

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Use of a detailed theoretical model has allowed the optimization of the design of a high sensitivity accelerometer, based on a fiber Bragg grating (FBG) and an accelerometer based on this design has been demonstrated experimentally. With a universal model based on double-point encapsulation established, the performance of the device in terms of its optimal sensitivity and frequency distribution has been analyzed, with an optimization 'figure of merit' using the product of the sensitivity and the resonant frequency being presented. The experimental results obtained indicate that the FBG-based accelerometer thus developed shows a broad, flat frequency band, a corresponding flat range sensitivity of ∼152.0pm/G, a resonant frequency of 441.0Hz, and a cross-axis sensitivity of less than 3.6% of the main-axis sensitivity. An accelerometer of this type and with this performance thus has the potential for the important field of low frequency oil-gas seismic exploration.

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Section: A the Theoretical Model Usedmentioning

confidence: 99%

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confidence: 99%

Design and Modeling of a High Sensitivity Fiber Bragg Grating-Based Accelerometer

Liu

Qiao

et al. 2019

IEEE Sensors J.

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“…When considering accelerometers based on FBGs, most rely on cantilever-mass [9] or spring-mass mechanisms [12]. The former design typically has an FBG glued onto the cantilever beam, with a mass at the end of the cantilever in order to bend the beam during vibrations.…”

mentioning

confidence: 99%

“…In contrast, the design of a spring-mass or diaphragm-mass system include an FBG which is directly connected to the mass so that the grating can be pulled by the mass while vibrating. Depending on the mechanical designs and the mass used, the sensitivity of such accelerometers can vary from a few pm/G to hundreds of pm/G (G = 9.8 m/s 2 ) [11,12]. However, the resonant frequency normally varies from ~100 Hz to ~1000 Hz, which limits the operational frequency range with a flat sensitivity to hundreds of Hz [9,12].…”

mentioning

confidence: 99%

“…Depending on the mechanical designs and the mass used, the sensitivity of such accelerometers can vary from a few pm/G to hundreds of pm/G (G = 9.8 m/s 2 ) [11,12]. However, the resonant frequency normally varies from ~100 Hz to ~1000 Hz, which limits the operational frequency range with a flat sensitivity to hundreds of Hz [9,12]. Hence, there is a tradeoff between the acceleration sensitivity and the resonant frequency, where the accelerometers with higher sensitivities usually indicate lower resonant peaks.…”

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confidence: 99%

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Novel accelerometer realized by a polarization-maintaining photonic crystal fiber for railway monitoring applications

Liu¹,

Htein²,

Gunawardena³

et al. 2019

Opt. Express

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In this paper, we present a novel accelerometer based on the Sagnac interferometer configuration using a polarization-maintaining photonic crystal fiber (PM-PCF), which has a sensitivity of ~8 pm/G, and a resonant frequency exceeding 2.5 kHz. The proposed accelerometer is capable of functioning with a constant sensitivity in a large frequency range from 0 to 1 kHz which is much wider than many FBG-based accelerometers. Experimental results obtained from a field test in railway monitoring, demonstrate a broader frequency range for the proposed accelerometer compared to that of the FBG based accelerometer and is comparable to the conventional piezoelectric sensor. The abrupt change in the acceleration measured by the sensor aids in locating any defect or crack present on the railway track. To the best of our knowledge, this is the first demonstration of an accelerometer based on a fiber interferometer aimed for the railway industry. The proposed accelerometer operating at high accelerations (>40 G) and capable of functioning at a broad frequency range, shows significant potential in being used in applications which require detection of strong and fast vibrations, especially in structural health monitoring of trains and railway tracks in real time.

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Multi-parameter dynamical measuring system using fibre Bragg grating sensors for industrial hydraulic piping

Huang

Pham

et al. 2019

Measurement

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A Miniaturized FBG Accelerometer Based on a Thin Polyurethane Shell

Cited by 24 publications

References 20 publications

Design and Modeling of a High Sensitivity Fiber Bragg Grating-Based Accelerometer

Design and Modeling of a High Sensitivity Fiber Bragg Grating-Based Accelerometer

Novel accelerometer realized by a polarization-maintaining photonic crystal fiber for railway monitoring applications

Multi-parameter dynamical measuring system using fibre Bragg grating sensors for industrial hydraulic piping

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