Novel integrated optical fiber sensor for temperature, pressure and flow measurement

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

doi:10.1016/j.sna.2018.07.034

Cited by 36 publications

(13 citation statements)

References 19 publications

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“…Due to the low sensitivity of bare FBGs, most studies have used structures such as cantilevers [ 12 , 13 ], bellows [ 14 ], cylinders [ 15 ], and elastic diaphragms to sensitize FBGs. The elastic diaphragm structure has attracted more attention due to its advantages of a large range, high sensitivity, and easy series connection.…”

Section: Introductionmentioning

confidence: 99%

Design of a Fiber Bragg Grating Pressure Sensor Based on a Metal Diaphragm and Lever Structure

Liu

Zeng

et al. 2022

Sensors

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In this paper, a pressure sensor based on a metal diaphragm and lever structure is designed, the sensing principle and mechanical structure of this sensor are analyzed and simulated, and its sensitization effectiveness and temperature compensation are verified. The maximum deflections of metal diaphragms of different sizes and materials were compared, and it was found that the square beryllium bronze diaphragm with a thickness of 1 mm and a side length of 20 mm had good elastic properties. The influence of the FBG in different positions of the lever on the center wavelength is analyzed. The sensitivity of the bare FBG is markedly improved under the influence of the two structures of the square elastic diaphragm and the lever, with a typical pressure sensitivity of 3.35 nm/MPa at 3 mm to the left of the lever center. The purpose of temperature compensation is achieved by adding another FBG that measures the temperature, and the sensing sensitivity can be tuned by adjusting the position of the FBG. It can meet the detection needs of a small range and high sensitivity.

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Section: Introductionmentioning

confidence: 99%

Design of a Fiber Bragg Grating Pressure Sensor Based on a Metal Diaphragm and Lever Structure

Liu

Zeng

et al. 2022

Sensors

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“…Leal-Junior et al [ 15 ] developed an FBG sensor embedded in polymer for the simultaneous measurements of temperature and pressure. Zhao et al [ 16 ] presented an integrated FBG sensor for the measurements of pressure, temperature, and flow rate, with resolutions of 6 KPa, 0.1°C, and

, respectively. Stephens et al [ 17 ] developed a FBG pressure sensor for the monitoring of patients with ventricular assist devices.…”

Section: Introductionmentioning

confidence: 99%

Fiber Bragg Grating Pressure Sensor Integrated with Epoxy Diaphragm

Her

Weng

2021

Sensors

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A fiber Bragg grating (FBG) sensor integrated with an epoxy diaphragm was developed for the measurement of pressure and water level. The bending strain of a circular diaphragm induced by uniform pressure was transferred to the FBG sensor. The response of the FBG sensor to the pressure was observed in terms of the Bragg wavelength shift which is linearly proportional to the strain. The effect of epoxy diaphragm thickness on the sensitivity and accuracy was investigated. The experimental results show that the sensitivity of FBG/epoxy diaphragm pressure sensor is decreasing with the increase of the diaphragm thickness. The sensitivities of the FBG pressure sensors with diaphragm thicknesses of 0.5 mm, 0.7 mm, and 1.0 mm were 175.5 pm/kPa, 89.5 pm/kPa, and 43.7 pm/kPa, respectively. The pressure measured by the proposed FBG sensor was compared with theoretical prediction and a close agreement was observed.

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“…Various studies were performed through fibre optic sensors according to sensing indicators including temperature (Bhuiyan et al 2016), strain (Fan et al 2020), vibration and pressure (Jin et al 2016). A new integrated fibre optic sensor was also developed for temperature, pressure and flow measurement (Zhao et al 2018). In terms of water pipeline leakage detection, various fibre optic hydrophones (FOH) were developed.…”

Section: Introductionmentioning

confidence: 99%

Cross-correlation analysis of multiple fibre optic hydrophones for water pipeline leakage detection

Guo

Shi

Chu

2021

Int. J. Environ. Sci. Technol.

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Leakage detection plays a significant role in water pipeline since leakage problems severely affect urban water supply safety. The fibre optic hydrophone derives from fibre optic hydroacoustic sensing technology and exhibits superior performance to traditional electric hydrophones. To investigate leakage detection performance of the proposed fibre optic hydrophone system, tests were conducted on overhead and buried pipelines, respectively. Two types of spherical valves were adopted for simulating leakage with different sizes. Effects of surrounding medium on leakage acoustic wave and positioning accuracy were studied. The signal was acquired by hydrophone analyser and analysed by a self-developed program. A revised crosscorrelation analysis of multi-signals was proposed and compared with that of two signals; it presented a better performance in time delay estimation. With leakage, overhead pipelines showed larger amplitudes than that of buried pipelines and signal amplitude increased with the opening degree of valves. The results reveal that the surrounding medium of the pipeline affected the leakage wave velocity and could attenuate the wave. The cross-correlation analysis of multiple hydrophones could increase the accuracy of leakage positioning. The proposed leakage detection system was feasible to detect leakage of both overhead and buried pipelines.

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Novel integrated optical fiber sensor for temperature, pressure and flow measurement

Cited by 36 publications

References 19 publications

Design of a Fiber Bragg Grating Pressure Sensor Based on a Metal Diaphragm and Lever Structure

Design of a Fiber Bragg Grating Pressure Sensor Based on a Metal Diaphragm and Lever Structure

Fiber Bragg Grating Pressure Sensor Integrated with Epoxy Diaphragm

Cross-correlation analysis of multiple fibre optic hydrophones for water pipeline leakage detection

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