High-spatial-resolution OFDR with single interferometer using self-compensation method

Zhong, Huajian; Fu, Cailing; Wang, Lijie; Du, Bin; Li, Pengfei; Meng, Yanjie; Chen, Lin; Du, Chunlei; Fu, Cailing

doi:10.1016/j.optlaseng.2022.107341

Cited by 10 publications

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The distributed fiber optic technology based on Optical Frequency Domain Reflectometry (OFDR) indeed enables high-precision, high-resolution, and blind-spot-free distributed strain measurements [7][8] . The advantages of optical fiber can be deployed in complex structures by using optical fiber as a sensor, such as the inside of R Angle in the V-shaped slot, and it also has the advantages of electromagnetic interference resistance and corrosion resistance, which can be applied to special complex test scenarios [9] . Based on the OFDR information demodulation algorithm, this study achieved highprecision OFDR sensor information demodulation by selecting a Gagelength value of 2mm.…”

Section: Introductionmentioning

confidence: 99%

Research and experiment on strain measurement of R-angle structure based on OFDR technology

Chen,

Li,

Yang

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

View full text Add to dashboard Cite

The distributed strain measurement of special complex structures (R-type structures) has always been a significant challenge, as traditional methods such as electronic and ultrasonic detection are insufficient. This paper utilizes the highprecision, high-resolution, and blind-spot-free distributed strain measurement achieved through the application of optical frequency domain reflectometry (OFDR) and distributed fiber optic technology. By developing OFDR information demodulation algorithms and selecting Gagelength values of different sizes, accurate demodulation of OFDR sensing information is achieved. Additionally, various loading experiments of different levels are conducted on multiple R-type samples to investigate the strain variations of materials with different R-angle values. Through analysis of multiple experimental data of the samples, it is observed that larger Gagelength values result in higher sensing accuracy, with smoother curves and greater influence from large strain gradients. Conversely, smaller Gagelength values lead to lower sensing accuracy, with more curved curves and lesser influence from large strain gradients. By reducing the Gagelength, it is possible to effectively eliminate strain outliers caused by large strain gradients, thereby reflecting the true strain distribution when the R-angle position is subjected to force. This further validates the feasibility of OFDR technology in strain measurement of complex structures, including R-type configurations.

show abstract

Section: Introductionmentioning

confidence: 99%

Research and experiment on strain measurement of R-angle structure based on OFDR technology

Chen,

Li,

Yang

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

View full text Add to dashboard Cite

show abstract

“…Since Wc Eickhoff et al proposed the optical frequency domain reflectometry (OFDR) sensing system in 1981 [ 1 ], due to its advantage of high spatial resolution, it is now widely used in distributed measurement fields such as temperature measurement [ 2 , 3 , 4 , 5 ], strain measured [ 6 , 7 , 8 , 9 ], and shape sensing [ 10 , 11 , 12 , 13 , 14 , 15 ]. The cross-correlation algorithm (CCA) is a common data processing algorithm for OFDR systems, which calculates the wavelength shift value by comparing spectrum fingerprint peaks between the reference signal and the measured signal.…”

Section: Introductionmentioning

confidence: 99%

Optical Frequency Domain Reflectometry Based on Multilayer Perceptron

Yin

Zhu

Liu

et al. 2023

Sensors

View full text Add to dashboard Cite

We proposed an optical frequency domain reflectometry based on a multilayer perceptron. A classification multilayer perceptron was applied to train and grasp the fingerprint features of Rayleigh scattering spectrum in the optical fiber. The training set was constructed by moving the reference spectrum and adding the supplementary spectrum. Strain measurement was employed to verify the feasibility of the method. Compared with the traditional cross-correlation algorithm, the multilayer perceptron achieves a larger measurement range, better measurement accuracy, and is less time-consuming. To our knowledge, this is the first time that machine learning has been introduced into an optical frequency domain reflectometry system. Such thoughts and results would bring new knowledge and optimization to the optical frequency domain reflectometer system.

show abstract

Strain measurement of CFRP-Steel bonded joints using distributed optical fibre sensors

Wang,

Wu,

2024

The Journal of Adhesion

View full text Add to dashboard Cite

High-spatial-resolution OFDR with single interferometer using self-compensation method

Cited by 10 publications

References 24 publications

Research and experiment on strain measurement of R-angle structure based on OFDR technology

Research and experiment on strain measurement of R-angle structure based on OFDR technology

Optical Frequency Domain Reflectometry Based on Multilayer Perceptron

Strain measurement of CFRP-Steel bonded joints using distributed optical fibre sensors

Contact Info

Product

Resources

About