Experimental study on an FBG strain sensor

Liu, Honglin; Zhu, Zhengwang; Zheng, Yong; Liu, Bang; Xiao, Feng

doi:10.1016/j.yofte.2017.09.003

Cited by 54 publications

(14 citation statements)

References 12 publications

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“…The pasted FBGs can measure the strain of the convex surfaces of the rubber strip, the relationship between the center wavelength and the strain of the FBG is as follows [21]:normalΔλλ=false(1−Pefalse)ε where Δ λ is the change of the center wavelength of the FBG caused by the strain ε , λ is the center wavelength of the FBG, and P e is the elastic-optical coefficient of optical fiber.…”

Section: Analysis Of the Fbg Strain Sensormentioning

confidence: 99%

High Precision, Small Size and Flexible FBG Strain Sensor for Slope Model Monitoring

Zheng

Zhao

et al. 2019

Sensors

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In this paper, a soft fiber Bragg grating (FBG) strain sensor was constructed of a rubber strip, FBGs and steel plates, which exhibits the advantages of high precision and a small size. A series of FBGs was uniformly pasted on a flexible rubber strip which can monitor the slope deformation by measuring the bending deformation of the rubber strip. Most notably, this sensor can be used to monitor horizontal displacement in the subsurface of the slope model. The relationships among the bending angle of the rubber strip, the strain of the rubber strip, and the subsurface deformation of the slope model were established. In addition, the subsurface deformation of the slope model can be obtained by the FBG strain sensor monitoring. Since a rigid-flexible structure was formed by uniformly pasting a series of steel plates on the other side of the rubber strip, the sensitivity of the FBG strain sensor was improved to be 1.5425 nm/°. The measurement results verify that the FBG strain sensor shows good performance, and the model test results demonstrate that the FBG strain sensor can be used for monitoring the subsurface deformation of the slope model.

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Section: Analysis Of the Fbg Strain Sensormentioning

confidence: 99%

High Precision, Small Size and Flexible FBG Strain Sensor for Slope Model Monitoring

Zheng

Zhao

et al. 2019

Sensors

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show abstract

“…However, to increase sensitivity, the sensor has to be installed as far as possible from the central axis of the bend. To measure bend deformations inside channels and pipes, special composite structures have to be designed, based on transducers that convert bending deformations to a linear deformation of the sensors [4,5,6,7,8,9,10] attached to the side surface of the transducer. Such sensor systems allow, for example, to conduct the measurements by inserting the sensing element into the channel of the object under investigation.…”

Section: Introductionmentioning

confidence: 99%

“…Another solution is applying differential measurement schemes that are insensitive to temperature, but require several independent lines of sensing elements [7,14]. Most commonly, the two-axis bend deformation sensor has a circle cross-section [5,6,7]. Its diameter is determined by the application area, as well as the required sensitivity to the bending deformation magnitude.…”

Section: Introductionmentioning

confidence: 99%

All-Fiber Highly Sensitive Bragg Grating Bend Sensor

Butov

Bazakutsa

Chamorovskiy

et al. 2019

Sensors

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“…Compared with the traditional electrical sensors, the fiber-optic strain sensors have been widely studied and applied owing to their unique advantages of compact size, immunity to electromagnetic interference, resistant to corrosion and permissible embedment [5]. So far fiber Bragg gratings sensors (FBG) [6], [7] have been developed rapidly due to their advantages of high multiplexing capability and high sensitivity. However, due to the limited length of the grating region, the strain can only be measured point by point.…”

Section: Introductionmentioning

confidence: 99%

Long-Sensing-Length Strain Sensor Based on Optical Fiber Fabry-Perot Interferometer With HCF-SMF Structure

Wang

Jiang

et al. 2019

IEEE Photonics J.

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We proposed and demonstrated an optical fiber Fabry-Perot (F-P) sensor with long sensing length for strain measurement. The structure of the sensor was fabricated with a simple process by splicing a long single mode fiber (SMF) with a short section of hollow-core fiber (HCF). The end of the SMF was cleaved with smooth reflective surface which hence allows the sensing length of the proposed sensor can achieve several centimeters with good visibility. Sensors with different sensing lengths were fabricated and experimentally analyzed in this paper. The relationship between the optical path difference (OPD) of the sensor and strain is found to be linear. With the sensing length of ∼10 mm and ∼49 mm, the sensor can achieve the OPD strain sensitivity of 20.42 nm/με and 115.57 nm/με at 1550 nm over the range of 1000 με respectively. Besides, with the sensing length of ∼10 mm, the OPD temperature sensitivity of the sensor was 187.64 nm/°C. With the advantages of easy making, low cost and long sensing length, it is anticipated that the proposed sensor has great potential in measuring the strain with a large distribution.

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Experimental study on an FBG strain sensor

Cited by 54 publications

References 12 publications

High Precision, Small Size and Flexible FBG Strain Sensor for Slope Model Monitoring

High Precision, Small Size and Flexible FBG Strain Sensor for Slope Model Monitoring

All-Fiber Highly Sensitive Bragg Grating Bend Sensor

Long-Sensing-Length Strain Sensor Based on Optical Fiber Fabry-Perot Interferometer With HCF-SMF Structure

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