Theoretical and Experimental Study on Wide Range Optical Fiber Turbine Flow Sensor

Du, Yuhuan; Guo, Yuhong

doi:10.3390/s16071095

Cited by 5 publications

(4 citation statements)

References 26 publications

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“…More modern types of turbine flow meters may use optical sensors to detect rotations of the rotor. In other words, the measurement principle is the same as in the inductive variant, but magnets are unnecessary and the pick-up unit is now an optical fiber probe [63]. Some commercially available indirect calorimeters that use a turbine flow sensor are the Q-NRG, Q-NRG+, and the Quark RMR (Cosmed).…”

Section: Flow Metermentioning

confidence: 99%

Indirect Calorimetry in Spontaneously Breathing, Mechanically Ventilated and Extracorporeally Oxygenated Patients: An Engineering Review

Priem

Jonckheer

Waele

et al. 2023

Sensors

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Indirect calorimetry (IC) is considered the gold standard for measuring resting energy expenditure (REE). This review presents an overview of the different techniques to assess REE with special regard to the use of IC in critically ill patients on extracorporeal membrane oxygenation (ECMO), as well as to the sensors used in commercially available indirect calorimeters. The theoretical and technical aspects of IC in spontaneously breathing subjects and critically ill patients on mechanical ventilation and/or ECMO are covered and a critical review and comparison of the different techniques and sensors is provided. This review also aims to accurately present the physical quantities and mathematical concepts regarding IC to reduce errors and promote consistency in further research. By studying IC on ECMO from an engineering point of view rather than a medical point of view, new problem definitions come into play to further advance these techniques.

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Section: Flow Metermentioning

confidence: 99%

Indirect Calorimetry in Spontaneously Breathing, Mechanically Ventilated and Extracorporeally Oxygenated Patients: An Engineering Review

Priem

Jonckheer

Waele

et al. 2023

Sensors

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“…The fluid to be measured can be toxic, corrosive, abrasive, flammable or a mixture of hazardous fluids, particles or gases [2]. The traditional electrical flow sensors such as turbine flow sensor, paddlewheel flow sensor, vibration-based and Pitot-tube flow sensors are often not suitable for flow monitoring in harsh environments with high-temperature zones, dangerous radioactive and electromagnetic regions, and high pressure and vibrations domains [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…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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“…1 As the core measurement parameter, the precise flow rate is of great value to the operating state of the engine. 2 Accompanied by the swift dynamic response, 3 wide measuring range 4 and high accuracy, 5 turbine flowmeters play a critical role in real-time flow monitoring of flight.…”

Section: Introductionmentioning

confidence: 99%

Investigation on pressure fluctuations of dual - and analogical single-rotor turbine flowmeters

Ren

Zhou

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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As a cutting-edge technology in the field of flow measurement, a dual-rotor turbine flowmeter is introduced into the refined measurement in hypersonic flight. In this study, to assess the characteristics of internal pressure fluctuation in the flowmeter, unsteady numerical calculations were performed using rotor motion programs, and the same method was applied to an analogical single-rotor turbine flowmeter. The frequency content, generation reasons, and propagation laws were analysed and compared. The results showed that the pressure fluctuations were primarily from the rotor-stator interaction, and the downstream rotor had a slight influence on the upstream rotor. For the dual-rotor turbine flowmeter, the characteristic frequency, 12.8 fn, composed of blade-passing frequencies of 6 fn and 6.8 fn, was confirmed. Affected by the reverse rotation of the two rotors, 6 fn, 12.8 fn and 6.8 fn developed into the dominant characteristic frequencies between the two rotors, and the amplitude at the downstream rotor inlet was maximal. In addition, compared with the single rotor, although the second rotor increases the pressure fluctuation around it, a more obvious fluctuation attenuation appeared around the downstream transition and support.

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Theoretical and Experimental Study on Wide Range Optical Fiber Turbine Flow Sensor

Cited by 5 publications

References 26 publications

Indirect Calorimetry in Spontaneously Breathing, Mechanically Ventilated and Extracorporeally Oxygenated Patients: An Engineering Review

Indirect Calorimetry in Spontaneously Breathing, Mechanically Ventilated and Extracorporeally Oxygenated Patients: An Engineering Review

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

Investigation on pressure fluctuations of dual - and analogical single-rotor turbine flowmeters

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