Temperature-independent FBG pressure sensor with high sensitivity

Liu, Lihui; Zhang, Hao; Zhao, Qida; Liu, Yuliang; Li, Fang

doi:10.1016/j.yofte.2006.09.001

Cited by 120 publications

(50 citation statements)

References 10 publications

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“…By embedding the polymer coated FBG in an aluminium cylinder they later increased the pressure sensitivity of their sensor to −5.28 nm/MPa [58]. A polymer coated FBG embedded in a copper cylinder with improved thermal stability was later reported with a sensitivity of −3.77 nm/MPa at 1558 nm [59]. An ultra thin FBG pressure sensor with the FBG orientated perpendicular to a diaphragm which meant the pressure induced a strain along the length of the FBG was subsequently reported by the same group.…”

Section: Fbg Pressure Sensorsmentioning

confidence: 99%

Fiber Bragg Grating Sensors for Mainstream Industrial Processes

2017

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This paper reviews fiber Bragg grating sensing technology with respect to its use in mainstream industrial process applications. A review of the various types of sensors that have been developed for industries such as power generation, water treatment and services, mining, and the oil and gas sector has been performed. A market overview is reported as well as a discussion of some of the factors limiting their penetration into these markets. Furthermore, the author's make recommendations for future work that would potentially provide significant opportunity for the advancement of fiber Bragg grating sensor networks in these mainstream industries.

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Section: Fbg Pressure Sensorsmentioning

confidence: 99%

Fiber Bragg Grating Sensors for Mainstream Industrial Processes

2017

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“…Their results showed the pressure sensitivity of this sensor is 1722 times higher than that of the bare grating. Some other groups used methods contain bonding FBGs to an isosceles triangle cantilever or a diaphragm structure [8][9][10] or embedding FBG in polymer [11,12]. However, some methods have complex structures which are hard to be fabricated and multiplexed in one single optic fiber.…”

Section: Introductionmentioning

confidence: 99%

Temperature Compensation Fiber Bragg Grating Pressure Sensor Based on Plane Diaphragm

2018

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Pressure sensors are the essential equipments in the field of pressure measurement. In this work, we propose a temperature compensation fiber Bragg grating (FBG) pressure sensor based on the plane diaphragm. The plane diaphragm and pressure sensitivity FBG (PS FBG) are used as the pressure sensitive components, and the temperature compensation FBG (TC FBG) is used to improve the temperature cross-sensitivity. Mechanical deformation model and deformation characteristics simulation analysis of the diaphragm are presented. The measurement principle and theoretical analysis of the mathematical relationship between the FBG central wavelength shift and pressure of the sensor are introduced. The sensitivity and measure range can be adjusted by utilizing the different materials and sizes of the diaphragm to accommodate different measure environments. The performance experiments are carried out, and the results indicate that the pressure sensitivity of the sensor is 35.7 pm/MPa in a range from 0 MPa to 50 MPa and has good linearity with a linear fitting correlation coefficient of 99.95%. In addition, the sensor has the advantages of low frequency chirp and high stability, which can be used to measure pressure in mining engineering, civil engineering, or other complex environment.

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“…The encapsulation technology protects the fiber from the severe environment in mounting processing without influencing the transmission of the strain applied to the FBG [7,8]. In recent years, various types of the FBG-based sensor [9,10] has been developed. Vengel Rao Pachava et al [11] used the longitudinal FBG deformation principle by the transverse deflection of a diaphragm which induced an axially stretched-strain along the length of the FBG thereby creating a red shift of Bragg wavelength with the increased pressure.…”

Section: Introductionmentioning

confidence: 99%

Development of Fibre Bragg grating (FBG) dynamic pressure transducer with diminutive voltage inconsistency

Aizzuddin

Hafizi

Kee

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In this work, a diaphragm-type Fibre Bragg grating (FBG) dynamic pressure transducer was designed and developed. Pressure transducer in this study consists of elastic thin metal diaphragm which acts as a primary sensing element; and integrated with an FBG sensor for the secondary sensing element. In the common match filter interrogation system, converting optical signal to voltage is the challenging due to voltage reading inconsistency, which would cause variation in pressure reading. New alternative arrangements of matched filter interrogation system are used to address the issue. For automated pressure measurement, the optical signal from FBG was converted into voltage by using the proposed arrangement of matched filter interrogation system. Additional FBG was added as reference sensor which installed in the system for detection the change of broadband light source. Reduction of voltage inconsistency was achieved by normalizing the voltage reading from sensor with the voltage reading from reference FBG. The result shows that the FBG pressure transducer is proven to be suitable for pressure measurement of gas or liquid with an average error of 5.348%. Furthermore, the FBG sensor has a good linearity with a linear correlation coefficient of 97.29% in pressure measurement. IntroductionRecently, increasing interest in worldwide industries towards the application of Fiber Bragg grating (FBG) in sensing technology has brought to the rapid development and deployment of optical sensors especially in the monitoring of temperature and strain. FBG has a number of advantages, such as relatively small size and long life span. Besides, it is also inexpensive to manufacture, lightweight, multiplexing ability, self-referencing with a linear response, ease of installation, durability and immune to electromagnetic interference (EMI) [1][2][3][4]. Moreover, a pressure quasi-distributed measure can be realized by multiplexing in one single optical fiber to provide multiple FBG sensing elements without the need of installing a huge amount of strain gauge [5]. Sensing process in extremely harsh environments such as explosive gas exposure setting, high-temperature combustion chamber, and environment which contains high electromagnetic interference is feasible by using FBG sensors due to its passive nature. Although naked FBG sensor is fragile, an approach to encapsulate the FBG sensor could solve the problem by adding carbon fiber for reinforcement and solidified by epoxy resin with encapsulation technique [6]. The encapsulation technology protects the fiber from the severe environment in mounting processing without influencing the transmission of the strain applied to the FBG [7,8].

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Temperature-independent FBG pressure sensor with high sensitivity

Cited by 120 publications

References 10 publications

Fiber Bragg Grating Sensors for Mainstream Industrial Processes

Fiber Bragg Grating Sensors for Mainstream Industrial Processes

Temperature Compensation Fiber Bragg Grating Pressure Sensor Based on Plane Diaphragm

Development of Fibre Bragg grating (FBG) dynamic pressure transducer with diminutive voltage inconsistency

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