High-Resolution and High-Precision ϕ-OFDR Strain Sensing Scheme Based on Adaptive Phase Unwrapping and Wavelet Packet Denoising

Liu, Kaijun; Yin, Guolu; Zhang, Zeheng; Yang, Pengxi; Lu, Huafeng; Li, Duidui; Zhu, Tao

doi:10.1109/jlt.2023.3319693

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…The optical fiber manufacturing process has a specific Rayleigh scattering spectral distribution due to uneven refractive index distribution. A certain position of the fiber is affected by temperature or strain, causing a shift in the Rayleigh scattering frequency, where there is a linear relationship between the amount of frequency shift and temperature and strain [ 13 ]. OFDR is an optical frequency domain reflection technology, which is combined with optical heterodyne detection technology to locate the scattered signal by measuring the frequency of Rayleigh scattering signal in optical fiber.…”

Section: Strain Measurement Principlesmentioning

confidence: 99%

“…With the advantages of OFDR technology, it provides a new idea for the design of various sensing test schemes [ 11 , 12 ]. At present, with the development of FBG and OFDR, FBG and OFDR have been widely used in the measurement of temperature, strain, stress and other physical parameters [ 13 , 14 , 15 ]. As the basic application of optical fiber sensing technology, strain measurement, as a key index, needs further calibration and analysis.…”

Section: Introductionmentioning

confidence: 99%

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Strain Measurement Technology and Precision Calibration Experiment Based on Flexible Sensing Fiber

Chen,

Yang,

et al. 2024

Sensors

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As the basic application of fiber optic sensing technology, strain measurement accuracy as a key index needs to be further calibrated and analyzed. In this paper, accuracy calibration experiments and the related analyses of two fiber-optic sensing technologies, the fiber-optic grating (FBG) and optical frequency domain reflectometry (OFDR), are carried out using a standard beam of equal strength and a mature resistive strain gauge (ESG). The fiber-optic single-point strain data for loading and unloading changes of the beams of equal strength show good continuity and linearity, with good cyclic stability, and the error in the strain test data is less than 2% after repeated loading. At the same time, using finite element theory to analyze the data and using the measured data error within 5%, a good strain test curve linearity is achieved and R2 is better than 0.998. After repeated loading and unloading tests, it is verified that the fiber grating and the distributed optical fiber in the strain test have good stability in repeatability accuracy. The calibration experiments and data analysis in this paper further illustrate the three sensing technologies in determining the strain test accuracy and the advantages and disadvantages of the indicators, and the development of the fiber optic sensing technology application provides basic technical support.

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Section: Strain Measurement Principlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Strain Measurement Technology and Precision Calibration Experiment Based on Flexible Sensing Fiber

Chen,

Yang,

et al. 2024

Sensors

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Real-Time Strain Field Measurement Based on Dense Fiber Bragg Gratings Array

Zhao,

Xiao,

Song

et al. 2024

IEEE Sensors J.

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Speckle-decoded temperature-insensitive strain identification in a multimode optical fiber

Sun,

Wu,

Song

et al. 2024

Opt. Lett.

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Fiber-optic sensing systems are significant tools for measuring various physical or biochemical parameters. However, temperature cross-sensitivity prevents accurate recognition of the target input signal when optical sensors are applied in practical scenarios. Herein, leveraging a deep learning algorithm, a speckle-decoded temperature-insensitive strain sensor is proposed and experimentally demonstrated. Scattering patterns are utilized to estimate the axial strain since the external force could change the coherent superposition of the amplitudes of propagating modes. The experimental results show that the recognition accuracy of the sensing system based on a classification model can reach 99.28% within a wide strain range of 0–0.3 N in the presence of temperature cross talk. In addition, the strain prediction demonstrates an average root-mean-square error of 1.02 N%. Such an intelligent speckle sensing strategy has the potential to broaden the applications of fiber-optic sensors in various engineering applications.

show abstract

High-Resolution and High-Precision ϕ-OFDR Strain Sensing Scheme Based on Adaptive Phase Unwrapping and Wavelet Packet Denoising

Cited by 4 publications

References 22 publications

Strain Measurement Technology and Precision Calibration Experiment Based on Flexible Sensing Fiber

Strain Measurement Technology and Precision Calibration Experiment Based on Flexible Sensing Fiber

Real-Time Strain Field Measurement Based on Dense Fiber Bragg Gratings Array

Speckle-decoded temperature-insensitive strain identification in a multimode optical fiber

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