title: Fiberoptic metal detector capable of profile detection.
abstract: The purpose of this paper is to develop a novel ferromagnetic polymeric metal detector system by using a fiber-optic Mach-Zehnder interferometer with a newly developed ferromagnetic polymer as the magnetostrictive sensing device. This ferromagnetic polymeric metal detector system is simple to fabricate, small in size, and resistant to RF interference (which is common in typical electromagnetic type metal detectors). Metal detection is made possible by disrupting the magnetic flux density present on the magnetostrictive sensor. This paper discusses the magnetic properties of the ferromagnetic polymers. In addition, the preliminary results of successful sensing of different geometrical metal shapes will be discussed.
authors.affiliation: Department of Engineering Science and Ocean Engineering, National Taiwan University, Taiwan.
authors.forename: Wei-Shu
authors.initials: WS
authors.lastname: Hua
authors.affiliation: Department of Material Science and Engineering, University of Washington, Seattle, WA, USA.
authors.forename: Joshua R
authors.initials: JR
authors.lastname: Hooks
authors.affiliation: Department of Material Science and Engineering, University of Washington, Seattle, WA, USA.
authors.forename: Nicholas A
authors.initials: NA
authors.lastname: Erwin
authors.affiliation: Department of Engineering Science and Ocean Engineering, National Taiwan University, Taiwan.
authors.forename: Wen-Jong
authors.initials: WJ
authors.lastname: Wu
authors.affiliation: Department of Mechanical Engineering, University of Washington, Seattle, WA, USA ; Department of Electrical Engineering, University of Washington, Seattle, WA, USA.
authors.forename: Wei-Chih
authors.initials: WC
authors.lastname: Wang
keywords: Mach-Zehnder interferometer; ferromagnetic polymer; fiber-optic sensor; metal detector; polymeric magnetostrictive material