A novel ground based multi bistatic radar for interferometric measurement of displacement vector

Mecatti, D.; Dei, Devis; Fratini, Matteo; Parrini, F.; Pieraccini, Massimiliano; Coppi, Francesco

doi:10.1109/igarss.2011.6050104

Cited by 4 publications

(5 citation statements)

References 5 publications

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“…There was only one Radar; therefore, the 3D vibrations fields measured by accelerometers were projected in the Radar LOS. The device was a Ku band (17.05-13.35 GHz) Radar of IDS GeoRadar, mentioned also in [3,5]; further details are also found in [7]. The signals plotted in Figure 2a The spectral analysis, plotted in Figure 2b, shows that the high frequency components of the vibration were so tiny as to fall below the Radar noise floor.…”

Section: Radar Acquisition Systemmentioning

confidence: 96%

“…The use of Radar for remote monitoring of vibrations and displacements in structures, infrastructures, and buildings has become more and more widespread thanks to the advent of small, cost-effective devices, combined with their intrinsic advantages due to a fast installation that avoids wiring, a sensitivity to vibrations from frequency zero to kHz, and a wide dynamic range [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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3D Vibration Estimation from Ground-Based Radar

Guarnieri

Falcone²,

D’Aria³

et al. 2018

Remote Sensing

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The paper proposes a method to estimate 2D/3D vibrations and displacements of mostly linear structures, like pipes, chimneys, towers, bridges from afar, based on synchronized Radars. The method takes advantage of Radar sensitivity to displacements to sense tiny deformations (up to tens of micron) with a time scale from milliseconds to hours. The key elements are: (a) The use of calibrators to remove at once both the tropospheric turbulence and the effect of radial motion, and (b) the compensation of interferences from fixed targets. The latter is performed by estimating and removing the contribution of interfering targets, based either on a proper data processing or by exploiting an ad-hoc motorized calibrator. Performance in terms of accuracy of the deformation field is evaluated theoretically and checked by tests carried out in laboratories and by full-scale acquisition campaigns.

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Section: Radar Acquisition Systemmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

3D Vibration Estimation from Ground-Based Radar

Guarnieri

Falcone²,

D’Aria³

et al. 2018

Remote Sensing

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“…Specially, this radar sensor achieves a spatial resolution dense to 0.5 m via a technology called step frequency continuous wave []. On the basis of IBIS‐S, a multi bistatic interferometric radar sensor was realized to measure the three dimensional displacement of structures []. In this system, only one IBIS‐S (called main radar unit) is required.…”

Section: Positioning Sensormentioning

confidence: 99%

Local positioning systems versus structural monitoring: a review

Casciati

2014

Struct. Control Health Monit.

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SUMMARY Structural monitoring and structural health monitoring could take advantage from different devices to record the static or dynamic response of a structure. A positioning system provides displacement information on the location of moving objects, which is assumed to be the basic support to calibrate any structural mechanics model. The global positioning system could provide satisfactory accuracy in absolute displacement measurements. But the requirements of an open area position for the antennas and a roofed room for its data storage and power supply limit its flexibility and its applications. Several efforts are done to extend its field of application. The alternative is local positioning system. Non‐contact sensors can be easily installed on existing infrastructure in different locations without changing their properties: several technological approaches have been exploited: laser‐based, radar‐based, vision‐based, etc. In this paper, a number of existing options, together with their performances, are reviewed. Copyright © 2014 John Wiley & Sons, Ltd.

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“…Notice that in the literature [16][17][18][19][20][21][22][23] some authors have already explored the possibility of using two or more radar interferometers for reconstructing displacement vectors. However, these researches are still far from providing a definitive solution, especially in the case of masonry constructions: indeed, the attention is focused on generic targets or, at most, on very different structural systems.…”

Section: Introductionmentioning

confidence: 99%

Radar Interferometric Experimental Reconstruction of Three-Dimensional Displacement Vectors and Mode Shapes for Masonry Constructions

Castellano

Camassa

Fraddosio

et al. 2022

J. Phys.: Conf. Ser.

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Radar interferometry is an innovative measurement technique capable of remotely measuring vibrations in terms of displacement history. It apparently allows overcoming some major drawbacks of the plodding and time-consuming conventional accelerometric experimental setup for vibration testing. Indeed, radar interferometry does not require any access to the structure; moreover, its use is simpler and faster. Therefore, this technique appears very appealing for ambient vibration testing on structures, and in particular on architectural heritage masonry constructions. However, radar interferometry is still affected by some relevant limitations, that currently outweigh the advantages. One of the most important limitations is that displacements are measured only along the line-of-sight; therefore, it is not possible to determine the whole three-dimensional displacement vector for moving structural points and, consequently, to reconstruct three-dimensional mode shapes of structures, whose knowledge is crucial for characterizing the dynamic behavior of structures and for detecting eventual damages. In this paper, a theoretical and experimental approach for reconstructing both three-dimensional displacement vectors and mode shapes of masonry constructions is proposed. This approach is based on the simultaneous use of two synchronized radar interferometers, and on the application of a theoretical model assuming a specific kinematical constraint, which is generally plausible in the case of masonry constructions. The proposed approach has been validated through in-situ experimental tests on a masonry bell tower.

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A novel ground based multi bistatic radar for interferometric measurement of displacement vector

Cited by 4 publications

References 5 publications

3D Vibration Estimation from Ground-Based Radar

3D Vibration Estimation from Ground-Based Radar

Local positioning systems versus structural monitoring: a review

Radar Interferometric Experimental Reconstruction of Three-Dimensional Displacement Vectors and Mode Shapes for Masonry Constructions

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