FBG based high sensitive pressure sensor and its low-cost interrogation system with enhanced resolution

Pachava, Vengal Rao; Srimannarayana, K.; Madhuvarasu, Sai Shankar; Kishore, Putha; Mamidi, Venkata Reddy

doi:10.1007/s13320-015-0259-7

Cited by 49 publications

(21 citation statements)

References 27 publications

(28 reference statements)

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“…Edge filtering processes can be performed with matched FBG-based filters [30], in-fiber Fabry-Perot micro-cavities [11], long period gratings [31], chirped-FBGs [32], tilted-FBGs [33], and a large length of fiber used to create the edge-filters such as Erbium doped fiber [34] or multimode fiber [35] based edge-filters. As presented by the authors in [11], the most equilibrated relation between visibility and dynamic range is achieved with the micro-cavities approach, which is also used in the current work.…”

Section: Fbg-based Iotof: a Fully Passive Optical Architecturementioning

confidence: 99%

IoToF: A Long-Reach Fully Passive Low-Rate Upstream PHY for IoT over Fiber

et al. 2019

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Internet of things (IoT) devices heavily rely on wireless connectivity. There are intrinsic overlooked limitations such as reach, availability, security and safety vulnerabilities closely associated with wireless solutions. Wired connectivity is the alternative to tackle those issues, and optical fibers directly connecting IoT devices could provide them unique features such as huge bandwidth, long reach, signal integrity and high security grade for the transmitted information. Nevertheless, it can be prohibitive for IoT devices which are power hungry and have costly electrical-to-optical conversions. In this paper, first, a niche is identified for IoT over fiber (IoToF) based on fully passive optical solutions for long reach upstream of low data rate optical connectivity over dark fibers. Then, we proposed, implemented and characterized a prototype physical connectivity (PHY) based on fiber Bragg grating (FBG) low-cost acousto-optic modulation at IoT devices and respective optical edge-filtering as wavelength discriminator at the receiver. Finally, we performed an experimental demonstration of upstream data communication based on simple M-ary frequency-shift keying (FSK), with baud rate of 300 bps transmitted over 30 km range. In terms of data rate and reach for niche applications, IoToF can outperform traditional wireless technologies, such as Sigfox or LoRa. IoToF will enable monitoring urban areas with scarce and polluted spectrum, industrial areas requiring intrinsic safety, and upstreaming data from IoT devices in remote locations with unfavorable wireless propagation but with dark fibers available.

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Section: Fbg-based Iotof: a Fully Passive Optical Architecturementioning

confidence: 99%

IoToF: A Long-Reach Fully Passive Low-Rate Upstream PHY for IoT over Fiber

et al. 2019

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“…Meanwhile, the pull wire acts on Spring 2, where FBG2 acts as the measuring grating and FBG1 acts as the reference grating. A pressure FBG sensor designed by Vengal et al [20] is shown in Fig. 16.…”

Section: Packaging Of Pre-stretched Fbg With Double-end Fixedmentioning

confidence: 99%

Packaging and Temperature Compensation of Fiber Bragg Grating for Strain Sensing: A Survey

Kuang

Guo

et al. 2018

Photonic Sens

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During last decades, sensor elements based on the fiber Bragg grating (FBG) have been widely studied and developed due to the advantages of immunity to electromagnetic interference, compact size, high precision, and so on. The FBG itself is sensitive to axial strain and temperature variation directly and can indirectly measure these complex physical parameters, such as pressure, displacement, and vibration, by using some specially designed elastic structures to convert them into the axial strain of the FBG. Whether the FBG is fixed on the measured object to measure the strain directly or fixed on an elastic structure body to measure other physical quantities, these types of FBGs could be collectively called as strain sensing FBGs. The packaging of the FBG has important influence on FBG characteristics that directly affect the measurement accuracy, such as strain transfer, temperature characteristic, and spectral shape. This paper summarizes the packaging methods and corresponding temperature compensation methods of the currently reported strain sensing FBGs, focusing especially on fully pasted FBG, pre-stretched FBG with double-end fixed, and metallic packaging. Furthermore, the advantages and drawbacks of different packaging methods have been analyzed, which can provide a reference for future researches.

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“…Pressure sensing has always been a primary concern in most engineering demands, such as oil and gas, hydraulic and pneumatic, petrochemical, and aerospace [1]. These heavy and harsh industries are putting traditional electrical pressure sensors at risk, where they are vulnerable to an explosion caused by sparks from a severe change in temperature and pressure, and intense electromagnetic interference (EMI) due to long transmission lines [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

High-Resolution Fibre Bragg Grating (FBG) Pressure Transducer for Low-Pressure Detection

Hafizi¹,

Vorathin²,

Aizuddin³

et al. 2019

IJAME

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Fibre Bragg grating (FBG) pressure sensor has shown great potential in replacing the conventional electrical pressure sensor due to its adaptability to the harsh environment. However, increasing its resolution for low-pressure measurement is still a challenge. In this work, the bonding of FBG to a rubber-based diaphragm pressure transducer was proposed. The proposed pressure transducer had enhanced the sensitivity to 117.7 pm/kPa across the range of 40 kPa, which corresponded to the pressure resolution of 0.008 kPa. Furthermore, the proposed pressure transducer possessed a reference FBG for temperature compensation, where the overall temperature effect was less than 1%.

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FBG based high sensitive pressure sensor and its low-cost interrogation system with enhanced resolution

Cited by 49 publications

References 27 publications

IoToF: A Long-Reach Fully Passive Low-Rate Upstream PHY for IoT over Fiber

IoToF: A Long-Reach Fully Passive Low-Rate Upstream PHY for IoT over Fiber

Packaging and Temperature Compensation of Fiber Bragg Grating for Strain Sensing: A Survey

High-Resolution Fibre Bragg Grating (FBG) Pressure Transducer for Low-Pressure Detection

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