Structural shape reconstruction with consideration of the reliability of distributed strain data from a Brillouin-scattering-based optical fiber sensor

Nishio, Mayuko; Mizutani, Tetsuya; Takeda, Nobuo

doi:10.1088/0964-1726/19/3/035011

Cited by 37 publications

(23 citation statements)

References 13 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The problem of real-time reconstruction of deflection shapes from position and curvature measurements from sensor networks has been widely studied, with applications to condition assessment, SHM, and shape control [28], [29], [30], [31]. Here, we select the polynomial interpolation method for reconstructing the deflection shapes from a network of curvature data, a technique also used to smoothen data.…”

Section: Sec Signal-strain Modelmentioning

confidence: 99%

Soft Elastomeric Capacitor Network for Strain Sensing Over Large Surfaces

Laflamme

Saleem

Vasan

et al. 2013

IEEE/ASME Trans. Mechatron.

View full text Add to dashboard Cite

Field applications of existing sensing solutions to structural health monitoring (SHM) of civil structures are limited. This is due to economical and/or technical challenges in deploying existing sensing solutions to monitor geometrically large systems. To realize the full potential of SHM solutions, it is imperative to develop scalable cost-effective sensing strategies. We present a novel sensor network specifically designed for strain sensing over large surfaces. The network consists of soft elastomeric capacitors (SECs) deployed in an array form. Each SEC acts as a surface strain gage transducing local strain into changes in capacitance. Results show that the sensor network can track strain history above levels of 25 με using an inexpensive off-the-shelf data acquisition system. Tests at large strains show that the sensor's sensitivity is almost linear over strain levels of 0-20%. We demonstrate that it is possible to reconstruct deflection shapes for a simply supported beam subjected to quasi-static loads, with accuracy comparable to resistive strain gages. Abstract-Field applications of existing sensing solutions to structural health monitoring (SHM) of civil structures are limited. This is due to economical and/or technical challenges in deploying existing sensing solutions to monitor geometrically large systems. To realize the full potential of SHM solutions, it is imperative to develop scalable cost-effective sensing strategies. We present a novel sensor network specifically designed for strain sensing over large surfaces. The network consists of soft elastomeric capacitors (SECs) deployed in an array form. Each SEC acts as a surface strain gage transducing local strain into changes in capacitance. Results show that the sensor network can track strain history above levels of 25 µε using an inexpensive off-the-shelf data acquisition systems. Tests at large strains show that the sensor's sensitivity is almost linear over strain levels of 0-20%. We demonstrate that it is possible to reconstruct deflection shapes for a simply supported beam subjected to quasi-static loads, with accuracy comparable to resistive strain gages. Keywords Electrical and Computer Engineering

show abstract

Section: Sec Signal-strain Modelmentioning

confidence: 99%

Soft Elastomeric Capacitor Network for Strain Sensing Over Large Surfaces

Laflamme

Saleem

Vasan

et al. 2013

IEEE/ASME Trans. Mechatron.

View full text Add to dashboard Cite

show abstract

“…Our research group constructed a shape reconstruction algorithm using a finite element (FE) model of the target structure, taking advantage of characteristics of the distributed strain data obtained by PPP-BOTDA [36,37]. The remarkable point is that, using not only raw strain data but also information of the non-uniformity of strain distribution profiles, the algorithm appropriately considers the data reliability for accurate shape reconstruction.…”

Section: Full-field Shape Reconstruction Using Distributed Strain Datamentioning

confidence: 99%

Recent advancement in optical fiber sensing for aerospace composite structures

Minakuchi

Takeda

2013

Photonic Sens

View full text Add to dashboard Cite

Optical fiber sensors have attracted considerable attention in health monitoring of aerospace composite structures. This paper briefly reviews our recent advancement mainly in Brillouin-based distributed sensing. Damage detection, life cycle monitoring and shape reconstruction systems applicable to large-scale composite structures are presented, and new technical concepts, "smart crack arrester" and "hierarchical sensing system", are described as well, highlighting the great potential of optical fiber sensors for the structural health monitoring (SHM) field.

show abstract

“…Note that the use of fiber sensors in the field of SHM is essential to detect fractures, deformations or disbonding of CFRP structures, being temperature a parameter of lower relevance. Unfortunately, most of fiber sensors suitable for SHM [21][22][23] are sensitive to both temperature and strain, leading in many cases to an unwanted cross-sensitivity between these two physical variables [24,25]. This is especially critical in environments with changeable temperature conditions (e.g.…”

Section: Introductionmentioning

confidence: 99%

Distributed modular temperature-strain sensor based on optical fiber embedded in laminated composites

Zhu¹,

Xie²,

Sun³

et al. 2019

Composites Part B: Engineering

View full text Add to dashboard Cite

A smart structure based on carbon fiber reinforced polymer (CFRP) embedding optical fibers is proposed for distributed sensing in structural health monitoring. The proposed CFRP package provides mechanical protection to the optical fiber, enables temperature-strain discrimination, and also facilitates the sensor's installation to secure reliable measurements. Experimental results verify a linear strain sensor response with temperature compensation, agreeing well with the response of strain gauges and the expected theoretical behavior. The smart structure can be used by gluing it on the surface of the monitored structure or by embedding it as one of the layers used during manufacturing big composite structures.

show abstract

Structural shape reconstruction with consideration of the reliability of distributed strain data from a Brillouin-scattering-based optical fiber sensor

Cited by 37 publications

References 13 publications

Soft Elastomeric Capacitor Network for Strain Sensing Over Large Surfaces

Soft Elastomeric Capacitor Network for Strain Sensing Over Large Surfaces

Recent advancement in optical fiber sensing for aerospace composite structures

Distributed modular temperature-strain sensor based on optical fiber embedded in laminated composites

Contact Info

Product

Resources

About