title: Development of a polymer based fiberoptic magnetostrictive metal detector system.
abstract: This paper presents a new metal detector using a fiberoptic magnetostriction sensor. The metal sensor uses a fiber-optic Mach-Zehnder interferometer with a newly developed ferromagnetic polymer as the magnetostrictive sensing material. This polymeric magnetostrictive fiberoptic metal sensor is simple to fabricate, small in size, and resistant to RF interference (which is common in typical electromagnetic type metal detectors). Metal detection is based on disruption of the magnetic flux density across the magnetostriction sensor. In this paper, characteristics of the material being sensed and magnetic properties of the ferromagnetic polymers will be discussed.
authors.affiliation: National Taiwan University wshua@mems.iam.ntu.edu.tw.
authors.forename: Wei Shu
authors.initials: WS
authors.lastname: Hua
authors.affiliation: University of Washington hooksj@u.washington.edu.
authors.forename: Joshua Rosenberg
authors.initials: JR
authors.lastname: Hooks
authors.affiliation: National Taiwan University wjwu@ntu.edu.tw.
authors.forename: Wen Jong
authors.initials: WJ
authors.lastname: Wu
authors.affiliation: University of Washington.
authors.forename: Wei Chih
authors.initials: WC
authors.lastname: Wang
keywords: Mach-Zehnder interferometer; ferromagnetic polymer; fiber-optic sensor; metal detector; polymeric magnetostrictive material