Towards a high-resolution flow camera using artificial hair sensor arrays for flow pattern observations

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    Abstract

    Flow-sensor arrays uncover the potential to measure spatio-temporal flow patterns rather than flow measurements at just a single point. We present in this paper the developments in design, fabrication and interfacing of biomimetic flow-sensor arrays, inspired by flow-sensitive organs (cerci) of crickets. For the purpose of high-resolution flow field visualization by our artificial hair flow-sensor arrays, various array-interfacing schemes are discussed and compared. Frequency division multiplexing (FDM) is shown to be an attractive method for efficient interrogation of capacitive array sensors. Using silicon-on-insulator technology with deep trench isolation structures, hair-based flow-sensors with differential capacitive read-out, arranged in single-chip arrays, have been successfully fabricated. FDM is implemented and used to interrogate individual hair sensors providing simultaneous real-time flow measurements from multiple hairs. This powerful approach is demonstrated by reconstruction of the field of a harmonic dipole field at the position of the hairs and by localizing this dipole source relative to the array elements.
    Original languageUndefined
    Pages (from-to)046009
    Number of pages12
    JournalBioinspiration & biomimetics
    Volume7
    Issue number4
    DOIs
    Publication statusPublished - 2012
    Event24th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2011 - Cancun, Mexico
    Duration: 23 Jan 201127 Jan 2011
    Conference number: 24

    Keywords

    • EWI-19702
    • IR-81502
    • METIS-296034
    • TST-Life like

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