Hua Wei-Shu, Hooks Joshua R, Erwin Nicholas A, Wu Wen-Jong, Wang Wei-Chih
Department of Engineering Science and Ocean Engineering, National Taiwan University, Taiwan.
Department of Material Science and Engineering, University of Washington, Seattle, WA, USA.
Proc SPIE Int Soc Opt Eng. 2011 Mar 31;7984:798429-. doi: 10.1117/12.880661.
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.
