Abstract
This paper describes the design and construction of a magnetostrictive composite-fiber-optic Mach-Zehnder interferometer capable of magnetic field and metal profile measurement. Unlike previous metal detectors, the sensor makes use of the magnetostriction effect on a fiber-optic interferometer to detect metallic objects. The metal detector overcomes many difficulties existing in conventional metal detectors. Aside from offering relatively high sensitivity (sensitivity of about 70.7 × 10−3 rad/gauss), the optical detection provides resistance to RF interference which is common in typical electromagnetic type metal detectors. The magnetostrictive sensor is also relatively compact and able to achieve a minimum spatial resolution of 1 cm2 for metal profile detection.
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Acknowledgement
This work is supported in part by NIH grant R01 EB007636-01A4.
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Wang, WC., Estroff, B., Hua, WS. (2014). Magnetostriction Induced Fiberoptic Metal Profile Detector. In: Tutsch, R., Cho, YJ., Wang, WC., Cho, H. (eds) Progress in Optomechatronic Technologies. Lecture Notes in Electrical Engineering, vol 306. Springer, Cham. https://doi.org/10.1007/978-3-319-05711-8_12
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DOI: https://doi.org/10.1007/978-3-319-05711-8_12
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