An active guide wire with shape memory alloy bending actuator fabricated by room temperature process

Takashi Mineta, Toshiaki Mitsui, Yoshiyuki Watanabe, Seiya Kobayashi, Yoichi Haga, Masayoshi Esashi

Research output: Contribution to journalConference articlepeer-review

65 Citations (Scopus)

Abstract

An active guide wire of 0.5 mm outer diameter has been developed. The guide wire has a simple and flexible structure that consists of a NiTi shape memory alloy (SMA) bending actuator with meandering shape and a bias coil that is covered with thin polyurethane tube. It can bend to one-direction by heating with electric current and is restored by the bias coil. Large current was necessary to bend the guide wire in water, however, it could bend over 60°. The rise of the surface temperature of the guide wire was less than 5°C in water. The SMA bending actuator has been photo-fabricated from a flatten SMA sheet which was spread flat after it was memorized in curve-shape. In order to fabricate the actuator below the transition temperature of the SMA, a room temperature photo-fabrication process has been also developed.

Original languageEnglish
Pages (from-to)632-637
Number of pages6
JournalSensors and Actuators, A: Physical
Volume97-98
DOIs
Publication statusPublished - 2002 Apr 1
EventTransducers'01 Eurosensors XV - Munich, Germany
Duration: 2001 Jun 102001 Jun 14

Keywords

  • Active guide wire
  • Photo-fabrication
  • SMA actuator

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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