As sensors become integrated in more applications, interest in magnetostrictive sensor technology has blossomed.
Magnetostrictive materials have many advantages and useful applications in daily life, such as high efficient coupling
between elastic and polymer material, large displacement, magnetic field sensors, micro actuator and motion motor, etc.
The purpose of this paper is to develop a metal sensor which is capable of detecting different geometries and shapes of
metal objects. The main configuration is using a Mach-Zehnder fiber-optic interferometer coated with magnetostrictive
material. The metal detector system is a novel design of metal detector, easy to fabricate and capable of high sensitivity.
In our design, metal detection is made possible by disrupting the magnetic flux density that encompasses the
magnetostriction sensor. In this paper, experimental setups are described and metal sensing results are presented. The
results of detecting complex metal's geometry and metal's mapping results are discussed.
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.
The purpose this paper is the development a novel polymeric fiber-optic magnetostrictive metal detector, using a fiber-
optic Mach-Zehnder interferometer and polymeric magnetostrictive material. Metal detection is based on the straininduced
optical path length change steming from the ferromagnetic material introduced in the magnetic field. Varied optical phase shifts resulted largely from different metal objects. In this paper, the preliminary results on the different metal material detection will be discussed.
Many small scale image display systems, such as head mounted displays (HMDs), beam light from an optical fiber onto deflectable mirrors or rotating polygonal mirrors to produce an image on an image plane. This approach has many size limitations. For instance, light beams of less than 3 millimeters are impractical for displays using mirrors, because mirror scanners and grating deflectors must be significantly larger than the light beam diameter to avoid beam clipping or adding diffraction. Reducing the diameter of a conventional display device reduces the possible number of pixels, and thus reduces the resolution and/or field of view (FOV) of the device. Our proposed HMD system focus on reducing the hardware while maintaining a high resolution by utilizing a microfabricated 2D optical scanner combined with a field-programmable gate array (FPGA) controller for display.
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