Liquid flow motion rate measuring method, based on the fiber Bragg gratings

Novikova, V. A.; Varzhel, S. V.; Tokareva, Ianina D.; Dmitriev, A. A.

doi:10.1007/s11082-020-2257-2

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…The optical fiber flow sensors have exceeded their conventional electrical counterparts due to their immunity to electromagnetic interference, simultaneously applicable in high temperature as well as cryogenic environments, compact in size, remote sensing and capability of multiplexing for distributed measurement over a long distance [7][8][9][10][11][12]. Different techniques have been proposed for fiber optic-based detection of different types of liquids and gases such as vortex shedding optical flow sensors [13], target-type fiber optic flow sensors [14][15][16][17][18], fiber optic turbine flow sensors [3,19], optical fiber anemometer flow sensors [20][21][22][23][24], fiber optic interferometric flow sensors [25,26], FBG based flow sensors [27][28][29][30], etc.…”

Section: Introductionmentioning

confidence: 99%

Design and development of an economical temperature compensated bidirectional fiber Bragg grating flow sensor

Ullah

Khan²,

Faisal³

2023

Eng. Res. Express

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A target-type cantilever based temperature compensated fiber Bragg grating (FBG) flow sensor is designed and developed with economical demodulation and data acquisition schemes. FBG is glued on the surface of a thin elastic stainless steel cantilever in pre-strained condition. The cantilever is mounted inside a flow channel by a special purpose brass holder with a height and direction adjustable threaded stem. The sensor is interrogated by an optical spectrum analyzer (OSA) and indigenously developed twin FBGs and chirped FBG – FBG intensity demodulation schemes. Response of the sensor is investigated in the flow rate range of 0 – 10 L/min in both forward and reverse flow directions. In spectral demodulation, the flow sensor offered a linear response in the full investigated range with a sensitivity of 19.2 pm/(L/min). However, the twin FBGs demodulation scheme presented a linear behaviour in the range of 4 – 10 L/min with sensitivities of 1.22 ± 0.03 µW/(L/min) and 29.89 ± 0.55 mV/(L/min) detected by the high speed power meter and photodetector, respectively. The novel CFBG-FBG intensity demodulator offered a linear response throughout its tested range and can offer a flow rate detection up to 265 L/min at the present sensitivity of the sensor with the condition that the cantilever-FBG system must be strong enough to withstand the higher flow rates. The temperature of the fluid is monitored by an FBG temperature sensing probe connected to the flow channel using intensity demodulation scheme by another pair of twin FBGs. Temperature compensation of the flow sensor is performed by arithmetic operations over the reflection intensities due to temperature probe to the results of the flow rates using a cost-effective data acquisition scheme.

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Section: Introductionmentioning

confidence: 99%

Design and development of an economical temperature compensated bidirectional fiber Bragg grating flow sensor

Ullah

Khan²,

Faisal³

2023

Eng. Res. Express

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“…В последнее время в литературе часто упоминаются датчики скорости потока жидкости или газа, где в роли чувствительных элементов выступают волоконные брэгговские решетки (ВБР), они могут выполнять роль термометра [1,2] или тензометра [3,4] в зависимости от выбранного принципа работы. Датчики скорости потока, в том числе термоанемометры, нашли широкое применение во многих отраслях промышленности, так как не имеют подвижных частей, обладают миниатюрным размером и имеют достаточно простую конструкцию: простейший термоанемометр состоит из нагревателя и термометра.…”

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“…Большинство таких анемометров предназначено для измерения скорости воздушного потока, так как мощности в несколько сотен милливатт достаточно для того, чтобы нагреть волокно, находящееся в воздушной среде, до относительно высоких температур. В ходе аналитического обзора были изучены работы [1,7], в которых авторам удалось создать датчик скорости потока жидкости c оптическим нагревом. Однако для увеличения чувствительности датчика необходимо увеличивать мощность нагрева, поэтому в датчиках скорости потока жидкости предпочтительно использовать электрические способы нагрева.…”

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