Development of a novel polymeric fiber-optic magnetostrictive metal detector

Hua, Wei; Hooks, Joshua; Wu, Wen-Jong; Wang, Wei Chih

doi:10.1117/12.847707

Cited by 5 publications

(20 citation statements)

References 2 publications

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“…The wooden cart was moved back and forth by hand when the sensor is detecting metal, striving for a constant speed. Based on previous experimental results [4][5][6], we summarized our results. First of all, our metal sensor allowed for detecting the presence of metal objects, but these methods were incapable of mapping its shape [4].…”

Section: Metal Detection Systemmentioning

confidence: 92%

“…Based on previous experimental results [4][5][6], we summarized our results. First of all, our metal sensor allowed for detecting the presence of metal objects, but these methods were incapable of mapping its shape [4]. Second, the metal sensor could detect one trial per moving path [5][6].…”

Section: Metal Detection Systemmentioning

confidence: 92%

“…An interferometer is used to measure the phase changes. Our research on metal detector system will concentrate on this technique; please refer to our previous experiments [4,5] for greater detail.…”

Section: Polymeric Fiber-optic Magnetostrictive Metal Detector Systemmentioning

confidence: 99%

“…The magnetic field is monitored by a high sensitivity Hall Effect sensor which is made by Allegro company (UGN 3503U), capable of detecting magnetic fields ranging from 0 to 900 Gauss. The calibration results of the transformer coil are described in another publication [4]. The output intensity from the photodetector is converted into an electrical signal and analyzed by a digital oscilloscope (Fluke 199C Scopemeter Color, 200MHz 2.5 Gs/s) via USB data output.…”

Section: Mach-zehnder Fiber-optic Interferometer Metal Detector Setupmentioning

confidence: 99%

“…In this paper, our research will concentrate on developing a novel compact metal detector system that overcomes aforementioned shortcomings. As we have previously published [4], our metal detector system is integrated Mach-Zehnder fiber-optic interferometer with the novel magnetostrictive material. The main concept of our metal detector is using a simple DC magnetic field scheme with the magnetostrictive material as the sensing device.…”

Section: Introductionmentioning

confidence: 99%

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2D metal profile detector using a polymeric fiber optic sensor

et al. 2012

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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.Keywords: fiber-optic sensor, metal detector, polymeric magnetostrictive material; ferromagnetic polymer, MachZehnder interferometer. INTRODUCTIONThe last twenty years have seen an explosion in metal sensor technology. Currently metal detectors can be categorized into three basic technologies: very low frequency (VLF), pulse induction (PI), and beat-frequency oscillation (BFO) [1][2][3]. In general, metal detector technology is a huge part of our daily lives, with a range of uses which spans from leisure to work to safety. They are commonplace in libraries, airports security, historical sites, prisons, stores, armed forces, shops and government buildings. These conventional metal detector systems share common shortcomings, such as not being able to detect the profile of a metal object, being resistant to RF interference caused by the surrounding electronics devices, and being relatively bulky in size. As we known, the recent increased interest in magnetostrictive sensor technology results from improvement in magnetostrictive material performance. In this paper, our research will concentrate on developing a novel compact metal detector system that overcomes aforementioned shortcomings. As we have previously published [4], our metal detector system is integrated Mach-Zehnder fiber-optic interferometer with the novel magnetostrictive material. The main concept of our metal detector is using a simple DC magnetic field scheme with the magnetostrictive material as the sensing device. The overall main configuration consists of fiber-optic MachZehnder interferometers, DC magnetic autotransformer, magnetostrictive sensor, and Hall Effect sensor as the reference. For our detector, a fiber-optic magnetic field sensor uses the change in length of a magnetostrictive element in the presence of a magnetic field to change the optical path length of a fiber optic magnetic sensor. Therefore, our metal detection is made possible by monitoring strain-induced optical path length change in the interferometer which stems from...

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Section: Metal Detection Systemmentioning

confidence: 92%

Section: Metal Detection Systemmentioning

confidence: 92%

Section: Polymeric Fiber-optic Magnetostrictive Metal Detector Systemmentioning

confidence: 99%

Section: Mach-zehnder Fiber-optic Interferometer Metal Detector Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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2D metal profile detector using a polymeric fiber optic sensor

et al. 2012

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Magnetostriction Induced Fiberoptic Metal Profile Detector

Wang

Estroff

Hua

2014

Progress in Optomechatronic Technologies

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Development of a polymer based fiberoptic magnetostrictive metal detector system

Hua

Hooks

et al. 2010

2010 International Symposium on Optomechatronic Technologies

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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.

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Development of a novel polymeric fiber-optic magnetostrictive metal detector

Cited by 5 publications

References 2 publications

2D metal profile detector using a polymeric fiber optic sensor

2D metal profile detector using a polymeric fiber optic sensor

Magnetostriction Induced Fiberoptic Metal Profile Detector

Development of a polymer based fiberoptic magnetostrictive metal detector system

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