Measuring humidity and moisture with fiber optic sensors

Kunzler, Wesley; Calvert, Sean G.; Laylor, Marty

doi:10.1117/12.544396

Cited by 14 publications

(11 citation statements)

References 1 publication

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“…This concept has since been discussed by several authors [9][10][11], with intended applications in various areas. The sensing principle used in this work is based on the strain effect induced on the FBG through the swelling of the moisture sensitive polymer-coated on the device and builds upon previous preliminary research published by the authors [12].…”

Section: Introductionmentioning

confidence: 98%

Characterisation of a polymer-coated fibre Bragg grating sensor for relative humidity sensing

Yeo

Sun

Grattan

et al. 2005

Sensors and Actuators B: Chemical

237

121

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Section: Introductionmentioning

confidence: 98%

Characterisation of a polymer-coated fibre Bragg grating sensor for relative humidity sensing

Yeo

Sun

Grattan

et al. 2005

Sensors and Actuators B: Chemical

237

121

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“…The reviews by Yeo et al [57] and Alwis et al [58] detailed the recent development of this kind of sensor, and concluded that such concept is still fairly new. While interesting works have been reported on the use of FBG sensors for soil moisture measurement [59,60], its applications in geohazard monitoring have still been rare. It is noteworthy that, using ROTDR or BOTDA technologies, distributed temperature sensing (DTS) optical fiber cables have been successfully applied to monitor soil moisture or seepage [61,62,63].…”

Section: Development Of Fbg-based Geohazard Monitoring Systemsmentioning

confidence: 99%

FBG-Based Monitoring of Geohazards: Current Status and Trends

Zhu

Shi

Zhang

2017

Sensors

125

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In recent years, natural and anthropogenic geohazards have occured frequently all over the world, and field monitoring is becoming an increasingly important task to mitigate these risks. However, conventional geotechnical instrumentations for monitoring geohazards have a number of weaknesses, such as low accuracy, poor durability, and high sensitivity to environmental interferences. In this aspect, fiber Bragg grating (FBG), as a popular fiber optic sensing technology, has gained an explosive amount of attention. Based on this technology, quasi-distributed sensing systems have been established to perform real-time monitoring and early warning of landslides, debris flows, land subsidence, earth fissures and so on. In this paper, the recent research and development activities of applying FBG systems to monitor different types of geohazards, especially those triggered by human activities, are critically reviewed. The working principles of newly developed FBG sensors are briefly introduced, and their features are summarized. This is followed by a discussion of recent case studies and lessons learned, and some critical problems associated with field implementation of FBG-based monitoring systems. Finally the challenges and future trends in this research area are presented.

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“…The monitoring of the moisture in oil and in soil has become very important recently in the industrial field as well as in agriculture, forestry and geography [18,46]. In the industrial field, the moisture in oil may induce the corrosion on the surfaces of metal parts in the engine and the occurrences of partial discharges in high-voltage electrical transformers.…”

Section: Moisture Sensing Experimentsmentioning

confidence: 99%

Polyimide-Coated Fiber Bragg Grating Sensors for Humidity Measurements

Wang¹,

Fang²,

Huang³

2012

High Performance Polymers - Polyimides Based - From Chemistry to Applications

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Compared to the conventional mechanical and electrical/electronic humidity sensors, fiber-optic based humidity sensors [6,14], including silica glass fiber and polymer optical fiber (POF) based sensors [28, 46], demonstrate many unique advantages, such as small size and low weight, immunity to electromagnetic interference, corrosion resistance, potentials for remote operation and distributed sensing. In fiber-optic sensor family, the fiber grating

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Measuring humidity and moisture with fiber optic sensors

Cited by 14 publications

References 1 publication

Characterisation of a polymer-coated fibre Bragg grating sensor for relative humidity sensing

Characterisation of a polymer-coated fibre Bragg grating sensor for relative humidity sensing

FBG-Based Monitoring of Geohazards: Current Status and Trends

Polyimide-Coated Fiber Bragg Grating Sensors for Humidity Measurements

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