Deformation vector measurement by means of ground based interferometric radar system

Michelini, Alberto; Coppi, Francesco

doi:10.1117/12.2279147

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…Some authors have proposed a number of solutions for reconstructing the whole displacement vector of a target. Except for a method able to detect both vertical and torsional movements of the sections of a bridge using an interferometric radar (Dei et al, 2009), other solutions are all based on the use of multiple interferometric radar sensors or bistatic radar systems (Michelini and Coppi, 2017;Monti-Guarnieri et al, 2018;Miccinesi et al, 2021;Michel and Keller, 2021;Olaszek et al, 2021).…”

Section: Reconstruction Of Mode Shapesmentioning

confidence: 99%

Modal testing of masonry constructions by ground-based radar interferometry for structural health monitoring: A mini review

Camassa

Vaiana

Castellano

2023

Front. Built Environ.

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Modal testing is one of the most effective experimental techniques for the structural health monitoring of masonry constructions, as it provides useful information for the calibration of structural models and for the assessment of structural damage. However, the application of modal testing to masonry constructions is sometimes hindered by the complexity of the conventional experimental set-up, which is generally based on contact sensors. In order to overcome this issue, several researchers are exploring the application of the ground-based radar interferometry, which is an increasingly popular measurement technique for remotely monitoring displacement and vibration of structures. Given the recently increasing number of articles on this subject, here we propose a mini review on the most significant works dealing with the application of ground-based radar interferometry for modal testing of masonry constructions. In particular, we show the current state of the art and highlight the main research gaps with the purpose of assessing the effectiveness of ground-based radar interferometry for the structural health monitoring of these constructions. Our mini review is primarily aimed at engineers and scientists who already know about modal testing and radar interferometry technique and are interested in the specific application to masonry constructions.

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Section: Reconstruction Of Mode Shapesmentioning

confidence: 99%

Modal testing of masonry constructions by ground-based radar interferometry for structural health monitoring: A mini review

Camassa

Vaiana

Castellano

2023

Front. Built Environ.

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“…In order to resolve 3-D deformations, the most effective way at the present stage is to utilize multiple GB-rad systems to measure simultaneously from various aspects [5,6]. Based on the concept of mathematical vector decomposition and composition, 3-D deformation vectors could be realized with multiple 1-D LOS deformations of these GB-rads [7,8].…”

Section: Introductionmentioning

confidence: 99%

Constrained geometry analysis to resolve 3-D deformations from three ground-based radars

Deng

Zhu

Weiming

et al. 2021

J. of Syst. Eng. Electron.

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When multiple ground-based radars (GB-rads) are utilized together to resolve three-dimensional (3-D) deformations, the resolving accuracy is related with the measurement geometry constructed by these radars. This paper focuses on constrained geometry analysis to resolve 3-D deformations from three GB-rads. The geometric dilution of precision (GDOP) is utilized to evaluate 3-D deformation accuracy of a single target, and its theoretical equation is derived by building a simplified 3-D coordinate system. Then for a 3-D scene, its optimal accuracy problem is converted into determining the minimum value of an objective function with a boundary constraint. The genetic algorithm is utilized to solve this constrained optimization problem. Numerical simulations are made to validate the correctness of the theoretical analysis results.

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“…Recently, the authors of this Letter proposed in a Letter [6] a novel mono/bistatic GBSAR configuration for retrieving the displacement vector using a transponder. Michelini and Coppi [7] studied other configurations of bistatic GBSAR. A critical issue using a transponder is its gain, that ideally should be greater than the path loss.…”

mentioning

confidence: 99%

Cross‐pol long‐cable transponder for bistatic ground‐based synthetic aperture radar

Pieraccini

Miccinesi

2018

Electron. lett.

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A transponder consisting of two antennas and an amplifier allows a ground-based synthetic aperture radar to operate as a bistatic system. In such a way, it is able to detect two displacement components of targets in its field of view. An enhanced transponder is proposed. Its special features are (i) cross-polarised antennas and (ii) antennas separated by a long RF cable (35 m). This transponder is able to provide 82 dB gain without triggering auto-oscillations. Monostatic and bistatic images have been obtained in an urban scenario.

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Deformation vector measurement by means of ground based interferometric radar system

Cited by 7 publications

References 24 publications

Modal testing of masonry constructions by ground-based radar interferometry for structural health monitoring: A mini review

Modal testing of masonry constructions by ground-based radar interferometry for structural health monitoring: A mini review

Constrained geometry analysis to resolve 3-D deformations from three ground-based radars

Cross‐pol long‐cable transponder for bistatic ground‐based synthetic aperture radar

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