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

Berend Wolf, Jonathan Morton, William MacPherson, Sietse van Netten

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48 Citations (Scopus)
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Abstract

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 mu m 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.

Original languageEnglish
Article number026013
Number of pages10
JournalBioinspiration & biomimetics
Volume13
Issue number2
DOIs
Publication statusPublished - Mar-2018

Keywords

  • artificial neuromast
  • bio-inspiration
  • lateral line
  • fibre Bragg grating
  • optical fibres
  • biophysics
  • fluid sensor
  • LATERAL-LINE SYSTEM
  • BRAGG GRATINGS
  • SENSOR ARRAYS
  • FIBER
  • DESIGN

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