Strain sensing based on a core diameter mismatch structure

Fernandes, Cindy Stella; Giraldi, Maria Thereza Miranda Rocco; Sousa, Marco; Costa, João Crisóstomo Weyl Albuquerque; Rodrigues, Leonardo Dantas; Silva, Filipe R. B. da; Ferreira, Gabriel; Reis, Renan A. N. dos

doi:10.1002/mop.31836

Cited by 5 publications

(4 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The three segments were fused spliced together (figure 12). The presence of the core mismatch between the fibers results in the excitation of multiple modes in the MMF [66][67][68][69][70][71]. In the multimode section, the longitudinal propagation constants, β m and β n , for the m and n order modes are related as [72]:…”

Section: Diameter Measurement Combined With Additive Manufacturingmentioning

confidence: 99%

A century on diameter measurement techniques in cylindrical structures

Cardoso,

Caldas,

Giraldi

et al. 2024

Meas. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

This work addresses the historical development of techniques and methodologies oriented to the measurement of the internal diameter of transparent tubes since the original contributions of Anderson and Barr published in 1923 in the first issue of Measurement Science and Technology. The progresses on this field are summarized and highlighted the emergence and significance of the measurement approches supported by the optical fiber.

show abstract

Section: Diameter Measurement Combined With Additive Manufacturingmentioning

confidence: 99%

A century on diameter measurement techniques in cylindrical structures

Cardoso,

Caldas,

Giraldi

et al. 2024

Meas. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The SMS structure has been widely used in curvature analysis in recent years for strain analysis [22,27,28]. The sensor is fabricated by a simple technique of fusion splicing of a small region of MMF with two SMFs.…”

Section: Introductionmentioning

confidence: 99%

“…Hong et al [37,38] developed and fabricated a fiber Bragg grating pressure sensor using a 3D printing method for the measurement of vertical pressure using PLA material. Another example of OFS embedding within structural materials based on AM is used for fatigue [39], strain [40] and deformation [41], curvature [28], and evaluating the integrity of the structures [42].…”

Section: Introductionmentioning

confidence: 99%

A Simple Optical Sensor Based on Multimodal Interference Superimposed on Additive Manufacturing for Diameter Measurement

Cardoso

Caldas

Giraldi

et al. 2022

Sensors

Self Cite

View full text Add to dashboard Cite

In many areas, the analysis of a cylindrical structure is necessary, and a form to analyze it is by evaluating the diameter changes. Some areas can be cited: pipelines for oil or gas distribution and radial growth of trees whose diameter changes are directly related to irrigation and the radial expansion since it depends on the water soil deficit. For some species, these radial variations can change in around 5 mm. This paper proposes and experimentally investigates a sensor based on a core diameter mismatch technique for diameter changes measurement. The sensor structure is a combination of a cylindrical piece developed using a 3D printer and a Mach–Zehnder interferometer. The pieces were developed to assist in monitoring the diameter variation. It is formed by splicing an uncoated short section of MMF (Multimode Fiber) between two standard SMFs (Singlemode Fibers) called SMF-MMF-SMF (SMS), where the MMF length is 15 mm. The work is divided into two main parts. Firstly, the sensor was fixed at two points on the first developed piece, and the diameter reduction caused dips or peaks shift of the transmittance spectrum due to curvature and strain influence. The fixation point (FP) distances used are: 5 mm, 10 mm, and 15 mm. Finally, the setup with the best sensitivity was chosen, from first results, to develop another test with an optimization. This optimization is performed in the printed piece where two supports are created so that only the strain influences the sensor. The results showed good sensitivity, reasonable dynamic range, and easy setup reproduction. Therefore, the sensor could be used for diameter variation measurement for proposed applications.

show abstract

“…Multimodal Interference (MMI) devices based on fiber optics have been extensively investigated in recent years for different applications as sensors to detect physical parameters, such as temperature [9], strain [10], vibration [11], and flow rate [12]. Optical fiber sensors (OFS) offer many advantages: They are not susceptible to electromagnetic interference, have low attenuation, are lightweight, can survive harsh environments, and tolerate high temperatures.…”

Section: Introductionmentioning

confidence: 99%

MMI Sensor for Diameter Measurement

Cardoso

Caldas

Giraldi

et al. 2021

The 8th International Electronic Conference on Sensors and Applications

View full text Add to dashboard Cite

Cylindrical structure analysis is important in several areas and can be performed through the evaluation of the diameter changes of these structures. Two important areas can be mentioned: pipelines for oil or gas distribution and the condition and growth of trees. In the tree diameter changes, monitoring is directly related to irrigation, since it depends on the water soil deficit and trees are important in the global circulation of heat and water. This diameter can change in the order of 5 mm for some species. In this paper, a strain gauge sensor based on a core diameter mismatch technique for diameter measurement is proposed and investigated. The sensor structure is formed by splicing an uncoated short section of MMF (Multimode Fiber) between two standard SMFs (Singlemode Fiber) called SMF–MMF–SMF (SMS); the MMF length is 15 mm. Two cylindrical structures were placed on a 3D printer, with different diameter sizes (DS: 80 mm and 110 mm), to assist in monitoring the diameter changes. The SMS sensor was placed on the printed structure and fixed at two points, such that, by reducing the diameter of the structure, the sensor presents dips or peaks shift of the transmittance spectrum due to the induced curvature and strain. Three values were used for the spacing between the fixation points (FP): (a) 5 mm, (b) 10 mm, and (c) 15 mm. For each choice of fixation points, DS = 80 mm: (a) a sensitivity of −0.876 nm/mm, R2 of 0.9909 and a dynamic range of 5 mm; (b) a sensitivity of −0.3892 nm/mm, R2 of 0.9954 and a dynamic range of 4 mm; and (c) a sensitivity of −0.768 nm/mm, R2 of 0.9811 and a dynamic range of 2 mm. For DS = 110 mm, the sensor presents for each choice of fixation points: (a) a sensitivity of −0.22 nm/mm, R2 of 0.9979 and a dynamic range of 8 mm; (b) a sensitivity of −0.2284 nm/mm, R2 of 0.9888 and a dynamic range of 6 mm; and (c) a sensitivity of −0.691 nm/mm, R2 of 0.9892 and a dynamic range of 3.5 mm.

show abstract

Strain sensing based on a core diameter mismatch structure

Cited by 5 publications

References 39 publications

A century on diameter measurement techniques in cylindrical structures

A century on diameter measurement techniques in cylindrical structures

A Simple Optical Sensor Based on Multimodal Interference Superimposed on Additive Manufacturing for Diameter Measurement

MMI Sensor for Diameter Measurement

Contact Info

Product

Resources

About