Testing of nitinol sensor on bending deformed polypropylene tube: comparison of winding methods

  • 1 Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Liberec, Czech Republic
  • 2 Faculty of Information Technology, Brno University of Technology, Brno, Czech Republic


A thin nitinol wire with a diameter of 0.05 mm was used as a surface sensor indicating deformation changes of the polypropylene tube during bending. Two types of nitinol wire windings were compared: parallel placement with the longitudinal axis of the tube and transverse windings around this axis. Changes in the electrical resistance of the wire were measured during the bending deformation. The sensitivity of the nitinol sensor, its comparison with conventional wire metal resistance strain gauge made of constantan alloy, its application possibilities, as well as the advantages resulting from the different winding geometry were discussed.



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