Strain Gauges Based 3D Shape Monitoring of Beam Structures Using Finite Width Gauge Model

Schaefer, Pierre-Loup; Barrier, Guilhaume; Chagnon, Grégory; Alonso, Thierry; Moreau–Gaudry, Alexandre

doi:10.1007/s40799-019-00312-4

Cited by 12 publications

(6 citation statements)

References 37 publications

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“…Notice that the resistance of the strain change with the gauge deformation [11]. The installation of the gauge on the rods, it is very important to have a smooth and clean surface that allows a proper installation and adhesion to ensure a correct measurement of the values that can be obtained during the test [12]; the gauge must be well installed to ensure adhesion with the surface, and for this, the procedure described in Figure 2 was considered.…”

Section: Methodology and Materialsmentioning

confidence: 99%

Structural and physical evaluation of a reinforced beam using strain gauges

García

Gómez

Amaya

2022

J. Phys.: Conf. Ser.

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In this research project,the deformations in the longitudinal and transverse reinforcing steel of a reinforced concrete beam with 2ϕ½” were estimated.Additionally,the displacements in thecenter of thespanweremeasuredtogether with theloads, which generatedthecrackingof the beam of dimensions180 mm×240 mm×3100 mm.Displacement were performed using a linear variable displacement transducer, and strain gauges were used to measure deformations. Finally, the applied load’s measurements were obtained with a load cell Pinzuar/Model-100/20T equipment.The physical-mechanical properties of the concreteused were determined through compressive strength tests at 28 days and modulus of elasticity.For this purpose, a load-bearing frame was used to support the beam at three points for load application.The data was collected directly on the Quantum/X2 equipment and analyzed with the help of the Catman/AP software.The maximum deformations found in the bending test at three point since there inforced concrete beam we are not greater than 8483µm/mm,presenting a failure in the center of the beam due to the creep of the tensile steel for a maximum load of 3115 Kg.Finally,the physical behavior of there inforced concrete beam with applying aload allows evaluating and optimizing this kind of systems.

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Section: Methodology and Materialsmentioning

confidence: 99%

Structural and physical evaluation of a reinforced beam using strain gauges

García

Gómez

Amaya

2022

J. Phys.: Conf. Ser.

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“…Shape sensing consists of techniques used to reconstruct the dynamic 3D shape in real-time for an object by collecting its geometric properties with external equipment without contact or from multiple embedded sensors [ 15 ]. This type of analysis may be relevant in the biomedical field for monitoring patients’ posture [ 16 ], in maintenance engineering for structural health monitoring [ 17 ] and in the aerospace industry to determine the wing shape of composite aircrafts [ 18 ] and others. The strategies that use scanners, cameras, and other similar types of equipment have good reconstruction performance; nonetheless, they face some difficulties with occlusion, portability and range of operation [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Two-Plane Position and Stress on Intensity-Variation-Based Sensors: Towards Shape Sensing in Polymer Optical Fibers

Biazi

Avellar

Frizera

et al. 2021

Sensors

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Shape reconstruction is growing as an important real-time monitoring strategy for applications that require rigorous control. Polymer optical fiber sensors (POF) have mechanical properties that allow the measurement of large curvatures, making them appropriate for shape sensing. They are also lightweight, compact and chemically stable, meaning they are easy to install and safer in risky environments. This paper presents a sensor system to detect angles in multiple planes using a POF-intensity-variation-based sensor and a procedure to detect the angular position in different planes. Simulations are performed to demonstrate the correlation between the sensor’s mechanical bending response and their optical response. Cyclic flexion experiments are performed at three test frequencies to obtain the sensitivities and the calibration curves of the sensor at different angular positions of the lateral section. A Fast Fourier Transform (FFT) analysis is tested as a method to estimate angular velocities using POF sensors. The experimental results show that the prototype had high repeatability since its sensitivity was similar using different test frequencies at the same lateral section position. The proposed approach proved itself feasible considering that all linear calibration curves presented a coefficient of determination (R2) higher than 0.9.

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“…In these works, the hypothesis concerning the beam The Euler-Bernoulli beam theory makes the assumption the cross section remains rigid and perpendicular to the neutral axis. Different beam shape monitoring methods based on this hypothesis have been proposed over the years [42,10,13,16,22,31,45,50,36] with applications such as bridge monitoring [9,11,39,47], minimally-invasive surgery [1,33,32,38,18,26,30,43,49,37] or wing deformation [23]. In these methods, the bending informations of the beam are retrieved from the measures of the strain sensors placed parallel to the beam at its surface and are used to reconstruct the beam shape in 2D or 3D.…”

Section: Introductionmentioning

confidence: 99%

3D small strain large deflection beam shape sensing including poisson effect

Schaefer

Chagnon

Moreau–Gaudry

2020

Engineering Structures

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This article presents a new method to monitor beam shapes from strain measures. The beam is instrumented with strain sensors placed on its surface with an angle of orientation. The method developed is a 3D large deflection beam shape reconstruction based on a beam model incorporating Poisson effect and is thus able to take into account bending, torsion, shearing and tensile-compression deformations. Exemple of application on circular beams is conducted with beam shape reconstructed from FEM simulations strain measures. Results show that, compared to beam shape sensing methods using axial strain, the beam shape method proposed provides a significant increase in the reconstruction accuracy when the beam is subject to deformations containing torsion.

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Strain Gauges Based 3D Shape Monitoring of Beam Structures Using Finite Width Gauge Model

Cited by 12 publications

References 37 publications

Structural and physical evaluation of a reinforced beam using strain gauges

Structural and physical evaluation of a reinforced beam using strain gauges

Influence of Two-Plane Position and Stress on Intensity-Variation-Based Sensors: Towards Shape Sensing in Polymer Optical Fibers

3D small strain large deflection beam shape sensing including poisson effect

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