Magnetostriction Induced Fiberoptic Metal Profile Detector

  • Wei-Chih WangEmail author
  • Benjamin Estroff
  • Wei-Shu Hua
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 306)


This paper describes the design and construction of a magnetostrictive composite-fiber-optic Mach-Zehnder interferometer capable of magnetic field and metal profile measurement. Unlike previous metal detectors, the sensor makes use of the magnetostriction effect on a fiber-optic interferometer to detect metallic objects. The metal detector overcomes many difficulties existing in conventional metal detectors. Aside from offering relatively high sensitivity (sensitivity of about 70.7 × 10−3 rad/gauss), the optical detection provides resistance to RF interference which is common in typical electromagnetic type metal detectors. The magnetostrictive sensor is also relatively compact and able to achieve a minimum spatial resolution of 1 cm2 for metal profile detection.


Fiberoptic sensor Metal detector Metal profile detector Magnetostriction Magnetostrictive polymer 



This work is supported in part by NIH grant R01 EB007636-01A4.


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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Wei-Chih Wang
    • 1
    • 2
    • 3
    Email author
  • Benjamin Estroff
    • 1
  • Wei-Shu Hua
    • 1
  1. 1.Department of Mechanical EngineeringUniversity of WashingtonSeattleUSA
  2. 2.Department of Electrical EngineeringUniversity of WashingtonSeattleUSA
  3. 3.Medical Device Innovation CenterNational Cheng Kung UniversityTainanTaiwan

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