A Miniaturized Optical Fiber Tip High-Temperature Sensor Based on Concave-Shaped Fabry–Perot Cavity

Zhu, Chen; Zhuang, Yiyang; Zhang, Bohong; Roman, Max; Wang, Philip P.; Huang, Jie

doi:10.1109/lpt.2018.2881721

Cited by 62 publications

(17 citation statements)

References 20 publications

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“…The aforementioned advantages of fiber-optic sensors make them good alternatives to conventional thermocouples for temperature measurements. Various fiber-optic temperature sensors have been reported that provide either point, [12] quasidistributed, [13] or fully distributed [14] measurements. The quasidistributed sensors based on fiber Bragg gratings (FBGs) have been successfully deployed in some commercial mold monitoring systems.…”

Section: Introductionmentioning

confidence: 99%

Shell Measurements and Mold Thermal Mapping Approach to Characterize Steel Shell Formation in Peritectic Grade Steels

Balogun

Roman

Gerald

et al. 2021

steel research int.

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Herein, the prospects of detecting peritectic behavior in carbon steels (Fe–C) using solidified shell thickness measurements and real‐time mold thermal maps are investigated. Irregular steel shell thickness and localized shell thinning are negative conditions associated with the peritectic transformation in many steel grades. Detailed three dimensional (3D) thickness maps are generated to directly contrast peritectic from nonperitectic solidification features using a laboratory dip test. Characterization of the steel shell also includes measurement of 3D shell surface deviations from a nominally flat surface. The unevenness parameter, which is calculated using the coefficient of variation in shell thickness as a function of the carbon content in the steel, clearly peaks around 0.14%C. A distributed fiber‐optic sensor, embedded 1 mm from the working face of a 100 × 55 × 12 mm3 thick copper chill block, has been used to obtain real‐time mold thermal maps of the solidification event during immersion of the block into molten steel. A programmable drive is used to control the motion of the chill block during immersion into a steel bath to minimize variability in immersion speed, position, and time. The thermal mapping measurements are well correlated with the shell profile measurements.

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Section: Introductionmentioning

confidence: 99%

Shell Measurements and Mold Thermal Mapping Approach to Characterize Steel Shell Formation in Peritectic Grade Steels

Balogun

Roman

Gerald

et al. 2021

steel research int.

Self Cite

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“…Several optical fiber-based sensors for temperature measurements were reported. Fiber-optic interferometers are commonly exploited for temperature measurements [ 6 ]. Interferometers offer high sensitivity and good temperature resolution, but they can only provide point measurements, similar to thermocouples.…”

Section: Introductionmentioning

confidence: 99%

A Spatially Distributed Fiber-Optic Temperature Sensor for Applications in the Steel Industry

Roman

Balogun

Zhuang

et al. 2020

Sensors

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This paper presents a spatially distributed fiber-optic sensor system designed for demanding applications, like temperature measurements in the steel industry. The sensor system employed optical frequency domain reflectometry (OFDR) to interrogate Rayleigh backscattering signals in single-mode optical fibers. Temperature measurements employing the OFDR system were compared with conventional thermocouple measurements, accentuating the spatially distributed sensing capability of the fiber-optic system. Experiments were designed and conducted to test the spatial thermal mapping capability of the fiber-optic temperature measurement system. Experimental simulations provided evidence that the optical fiber system could resolve closely spaced temperature features, due to the high spatial resolution and fast measurement rates of the OFDR system. The ability of the fiber-optic system to perform temperature measurements in a metal casting was tested by monitoring aluminum solidification in a sand mold. The optical fiber, encased in a stainless steel tube, survived both mechanically and optically at temperatures exceeding 700 °C. The ability to distinguish between closely spaced temperature features that generate information-rich thermal maps opens up many applications in the steel industry.

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“…Currently, the development of optical fiber temperature sensors are mainly based on two technical routes: fiber grating based temperature sensors [6][7][8][9][10][11][12][13][14] and fiber interferometer based temperature sensors [15][16][17][18][19][20][21][22][23][24][25][26][27][28]. For fiber grating based temperature sensors, long period grating (LPG) is a common employed device [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Compared to fiber grating based temperature sensors, fiber interferometer based temperature sensors are much more desirable sensors and have gradually become the most widely used optical fiber temperature sensors for their simple structure and high sensitivity. The fiber interferometers employed to construct temperature sensors mainly contain Fabry-Perot interference (FPI) [15][16][17][18], Michelson interferometer (MI) [19,20], Mach-Zehnder interferometer (MZI) [21][22][23] and Sagnac interferometer (SI) [24][25][26][27][28][29][30], which are fabricated by using different kinds of fibers including thin core fiber [15], single mode fiber [19][20][21][22], microfiber [23,30], polarization maintain fiber [24][25][26]28], photonic crystal fiber [27,29] and so on. Among the above mentioned fiber interferometers, a very high temperature sensitivity of −16.38 nm/°C has been achieved with an isopropanol cladding elliptical microfiber based SI [30].…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Temperature Sensor Based on All-Fiber Polarization Interference Filter With Vernier Effect

et al. 2020

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A Miniaturized Optical Fiber Tip High-Temperature Sensor Based on Concave-Shaped Fabry–Perot Cavity

Cited by 62 publications

References 20 publications

Shell Measurements and Mold Thermal Mapping Approach to Characterize Steel Shell Formation in Peritectic Grade Steels

Shell Measurements and Mold Thermal Mapping Approach to Characterize Steel Shell Formation in Peritectic Grade Steels

A Spatially Distributed Fiber-Optic Temperature Sensor for Applications in the Steel Industry

Highly Sensitive Temperature Sensor Based on All-Fiber Polarization Interference Filter With Vernier Effect

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