An optical fiber sensor for simultaneous measurement of flow rate and temperature in the pipeline

Lv, Ri-qing; Zheng, Hong-kun; Zhao, Yong; Gu, Ya-fei

doi:10.1016/j.yofte.2018.08.003

Cited by 40 publications

(10 citation statements)

References 17 publications

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“…We will also test our approach in this manner. As it will be presented, the results estimated following the recommendation from this practical technical note are more reliable compared to those obtained using portable flowmeters in systems with a complex geometry of pipeline following the pump [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 76%

Simplified Indirect Estimation of Pump Flow Discharge: An Example from Serbia

Rašić-Amon

Radić

Stajić

et al. 2021

Water

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In the absence of a flowmeter or due to its inaccuracy, the flow rate at the discharge section of the pipeline following the observed pump can be roughly estimated if the pressure can be measured instead. To use the proposed procedure two main conditions should be achieved: (1) a manometer should be installed at the discharge pipeline between the pump and the flow regulation valve, and (2) the actual curve that relates pressure and flow for the observed pump unit should be known in advance. The described example is from Serbia, but it is of interest for any water pumping station with a submersible pump (installed in wells or tanks) where a limited number of adequate places for the measuring of flow are available (if any are available at all), but where the pressure at the discharge pipe of the observed pump can be measured. This simplified method can find applicability in installations in remote rural regions where limited resources are available. The results show that the calculated values of the flow obtained by the presented method deviate greatly in relation to the measured values provided by the portable ultrasonic flowmeter, up to 60% at one of the measuring points. However, in relation to the measured values provided by the permanently installed flowmeter the discrepancy is significantly lower (0.6–6.8%).

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Section: Introductionmentioning

confidence: 76%

Simplified Indirect Estimation of Pump Flow Discharge: An Example from Serbia

Rašić-Amon

Radić

Stajić

et al. 2021

Water

View full text Add to dashboard Cite

show abstract

“…Experimental results show that the errors of the measurements of temperature and mechanical strain using present approach are 6% and 4% in comparison with the thermocouple and theoretical prediction, respectively. Lv et al [ 14 ] employed two FBG sensors to simultaneously measure the flow rate and temperature in a pipeline with temperature accuracy of ±1 °C in the range of 23–83 °C, which is closed to the present approach. A theoretical analysis verified by the experimental measurement illustrates that the proposed method with one single FBG sensor can be used to discriminate the temperature and strain.…”

Section: Discussionmentioning

confidence: 93%

“…Anastasopoulos et al [ 13 ] proposed a novel vibration-based method using FBG sensors to identify the damage in civil structures for structural health monitoring. Lv et al [ 14 ] used two FBG sensors to simultaneously measure the flow rate and temperature in a pipeline. Górriz et al [ 15 ] presented a new FBG sensor embedded in concrete structures to monitor temperature during fires.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Measurement of Temperature and Mechanical Strain Using a Fiber Bragg Grating Sensor

Her

Lin

2020

Sensors

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Based on the shift of the Bragg wavelength, fiber Bragg grating (FBG) sensors have been employed to measure a variety of physical parameters such as stress, strain, displacement, temperature, vibration and pressure. In this work, a simple and easy way to be implemented FBG sensing methodology was proposed to measure the temperature and strain simultaneously. Half of the FBG was bonded on the host structure, while the other half of the FBG was left free. The host structure was an aluminum test specimen with dimensions of 20 × 3.8 × 0.5 cm3. As the host structure subjected to mechanical and thermal loadings, the Bragg wavelengths reflected from the bonded and unbonded FBGs are different. Theoretical predictions of the Bragg wavelength shifts of the bonded and unbonded FBGs were presented. Utilizing the Bragg wavelength shift of unbonded FBG, the temperature can be determined and is independent of mechanical strain. The Bragg wavelength shift of the bonded FBG allows the determination of the mechanical strain. The temperature measured by FBG sensor was compared with the result from a thermocouple, while the mechanical strain was validated with the theoretical prediction. Good agreement between the experimental measurement and theoretical prediction demonstrates that temperature-strain discrimination can be realized using the proposed method with one single FBG sensor.

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“…Hong-kun et al [15] reported an optical fiber pressure sensor using two FBGs to reduce the cross-sensitivity between the temperature and pressure, leading to a high pressure sensitivity of 1.198 nm/MPa in the range of 0-1 MPa. Lv et al [16] developed an optical fiber sensor consisting of two FBGs for simultaneous measurements of the flow rate and temperature in a pipeline, with an accuracy of 2.27% and ±1 • C, respectively. Jang and Kim [17] utilized an FBG sensor to detect impact-generated acoustic emission (AE) signals and to analyze the wavelet transform (WT) method for realtime delamination monitoring of a composite plate.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Temperature Monitoring under Thermal Cycling Loading with Optical Fiber Sensor

Her

Tasi

2022

Sensors

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A fiber optic sensing system consisting of a fiber Bragg grating (FBG) sensor, optical circulator, optical band pass filter and photodetector is developed to monitor the real-time temperature response of a structure under a dynamic thermal loading. The FBG sensor is surface-bonded on a test specimen and integrated with an optical band pass filter. As a broadband light source transmits into a FBG sensor, a specific wavelength is reflected and transmitted into an optical band pass filter. The reflected wavelength is significantly affected by the temperature, while the output light power from the optical band pass filter is dependent on the wavelength. By measuring the light power with a photodetector, the wavelength can be demodulated, resulting in the determination of the temperature. In this work, the proposed optical sensing system was utilized to monitor the dynamic temperature change of a steel beam under a thermal cycling loading. To verify the accuracy of the fiber optic sensor, a thermocouple was adopted as the reference. The experimental results illustrate a good agreement between the fiber optic sensor and thermocouple. Electronic packages composed of various components such as a solder joint, silicon die, mold compound, and solder mask are frequently subjected to a thermal cycling loading in real-life applications. Temperature variations’ incorporation with mismatches of coefficients of thermal expansion among the assembly components leads to crack growth, damage accumulation and final failure. It is important to monitor the temperature to prevent a thermal fatigue failure. A fast response and easy implementation of the fiber optic sensing system was proposed for the real-time temperature measurement under thermal cycling loading.

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An optical fiber sensor for simultaneous measurement of flow rate and temperature in the pipeline

Cited by 40 publications

References 17 publications

Simplified Indirect Estimation of Pump Flow Discharge: An Example from Serbia

Simplified Indirect Estimation of Pump Flow Discharge: An Example from Serbia

Simultaneous Measurement of Temperature and Mechanical Strain Using a Fiber Bragg Grating Sensor

Real-Time Temperature Monitoring under Thermal Cycling Loading with Optical Fiber Sensor

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