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    A Miniaturized Force Sensor Based on Hair-Like Flexible Magnetized Cylinders Deposited Over a Giant Magnetoresistive Sensor

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    Type
    Article
    Authors
    Ribeiro, Pedro cc
    Khan, Mohammed Asadullah cc
    Alfadhel, Ahmed cc
    Kosel, Jürgen cc
    Franco, Fernando
    Cardoso, Susana
    Bernardino, Alexandre cc
    Santos-Victor, Jose cc
    Jamone, Lorenzo cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Date
    2017-06-13
    Online Publication Date
    2017-06-13
    Print Publication Date
    2017-11
    Permanent link to this record
    http://hdl.handle.net/10754/626597
    
    Metadata
    Show full item record
    Abstract
    The detection of force with higher resolution than observed in humans (similar to 1 mN) is of great interest for emerging technologies, especially surgical robots, since this level of resolution could allow these devices to operate in extremely sensitive environments without harming these. In this paper, we present a force sensor fabricated with a miniaturized footprint (9 mm(2)), based on the detection of the magnetic field generated by magnetized flexible pillars over a giant magnetoresistive sensor. When these flexible pillars deflect due to external loads, the stray field emitted by these will change, thus varying the GMR sensor resistance. A sensor with an array of five pillars with 200 mu m diameter and 1 mm height was fabricated, achieving a 0 to 26 mN measurement range and capable of detecting a minimum force feature of 630 mu N. A simulation model to predict the distribution of magnetic field generated by the flexible pillars on the sensitive area of the GMR sensor in function of the applied force was developed and validated against the experimental results reported in this paper. The sensor was finally tested as a texture classification system, with the ability of differentiating between four distinct surfaces varying between 0 and 162 mu m root mean square surface roughness.
    Citation
    Ribeiro P, Khan MA, Alfadhel A, Kosel J, Franco F, et al. (2017) A Miniaturized Force Sensor Based on Hair-Like Flexible Magnetized Cylinders Deposited Over a Giant Magnetoresistive Sensor. IEEE Transactions on Magnetics 53: 1–5. Available: http://dx.doi.org/10.1109/TMAG.2017.2714625.
    Sponsors
    This work was supported under Project EXCL/CTM-NAN/0441/2012, Project PTDC/CTM-NAN/3146/2014, and Project UID/EEA/50009/2013. The work of F. Franco was supported by FCT Project under Grant SFRH/BD/111538/2015. The work of L. Jamone was supported by LIMOMAN-PIEFGA-2013-628315.
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    IEEE Transactions on Magnetics
    Conference/Event name
    IEEE International Magnetics Conference (Intermag)
    DOI
    10.1109/TMAG.2017.2714625
    Additional Links
    http://ieeexplore.ieee.org/document/7947170/
    ae974a485f413a2113503eed53cd6c53
    10.1109/TMAG.2017.2714625
    Scopus Count
    Collections
    Articles; Electrical and Computer Engineering Program; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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