Hua Wei Shu, Hooks Joshua Rosenberg, Wu Wen Jong, Wang Wei Chih
National Taiwan University
University of Washington
Optomechatron Technol ISOT 2010 Int Symp (2010). 2010 Oct;2010. doi: 10.1109/ISOT.2010.5687341.
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.
