Two-axis accelerometer based on multicore fibre Bragg gratings

Fender, A.; MacPherson, William N.; Maier, Robert R. J.; Barton, James S.; George, David J.; Howden, Robert I.; Smith, Graham W.; Jones, Ben; McCulloch, Scott; Chen, Xianfeng; Suo, Rui; Zhang, Lin; Bennion, I.

doi:10.1117/12.738411

Cited by 11 publications

(14 citation statements)

References 8 publications

(7 reference statements)

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“…Multicore Fiber (MCF) Sensors for high-precision curvature sensing have many applications in Mechanical, Civil, Aerospace, and Medical Engineering. For example, an ultrasensitive multicore optical fiber-based vector bending sensor has been developed for continuously monitoring the verticality of buildings, towers, bridge piles, and other infrastructures [6], a curvature sensing multicore fiber displacement sensor has been used for tunnel monitoring [7] and a two-axis temperature-insensitive accelerometer has been developed based on an MCF curvature sensor [8].…”

Section: Introductionmentioning

confidence: 99%

Measurement uncertainty of multicore optical fiber sensors used to sense curvature and bending direction

et al. 2019

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This paper describes a study of the influence of strain measurement uncertainty on sensing curvature and bending direction, considering one of the most widely used fiber geometries for sensing applications (7-core Multicore Fiber) with different core spacings (distance between outer cores and fiber axis). The Monte Carlo method was proposed to simulate the real measurement process and 33 simulations with 10 6 iterations were performed to determine the laws of propagation of strain measurement uncertainty in calculating curvature and bending direction. The outcomes, which show the strong influence of strain uncertainty and core spacing on the accuracy of Multicore Fiber sensors, can be used to support the design of new sensors or new fiber geometry and to predict their achievable performance.

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Section: Introductionmentioning

confidence: 99%

Measurement uncertainty of multicore optical fiber sensors used to sense curvature and bending direction

et al. 2019

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“…A compact two-axis accelerometer can be made by mass loading the end of a short length of MCF clamped as a cantilever, showing a linear response over a 6g range up to 200 Hz [8].…”

Section: Btue3pdfmentioning

confidence: 99%

Bragg Gratings in Multicore Optical Fibers for Sensor Applications

Jones

Barton

MacPherson

et al. 2007

Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides

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“…This requires the gratings to be located outside the neutral (bending) axis of a cantilever structure. Examples of FBG curvature sensors (Flockhart et al 2003) and accelerometers (Fender et al 2007) have also been developed using multicore optical fibres with multiple cores positioned away from the neutral axis.…”

Section: Introductionmentioning

confidence: 99%

Bio-inspired all-optical artificial neuromast for 2D flow sensing

et al. 2018

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We present the design, fabrication and testing of a novel all-optical 2D flow velocity sensor, inspired by a fish lateral line neuromast. This artificial neuromast consists of optical fibres inscribed with Bragg gratings supporting a fluid force recipient sphere. Its dynamic response is modelled based on the Stokes solution for unsteady flow around a sphere and found to agree with experimental results. Tuneable mechanical resonance is predicted, allowing a deconvolution scheme to accurately retrieve fluid flow speed and direction from sensor readings. The optical artificial neuromast achieves a low frequency threshold flow sensing of 5 mm s −1 and 5 μm s −1 at resonance, with a typical linear dynamic range of 38 dB at 100 Hz sampling. Furthermore, the optical artificial neuromast is shown to determine flow direction within a few degrees.

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Two-axis accelerometer based on multicore fibre Bragg gratings

Abstract: We report an accelerometer based upon a simple fibre cantilever constructed from a short length of multicore fibre (MCF) containing fibre Bragg gratings (FBGs). Two-axis measurement is demonstrated up to 3 kHz.

Cited by 11 publications

References 8 publications

Measurement uncertainty of multicore optical fiber sensors used to sense curvature and bending direction

Measurement uncertainty of multicore optical fiber sensors used to sense curvature and bending direction

Bragg Gratings in Multicore Optical Fibers for Sensor Applications

Bio-inspired all-optical artificial neuromast for 2D flow sensing

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