Monitoring of Civil Infrastructures by Interferometric Radar: A Review

Pieraccini, Massimiliano

doi:10.1155/2013/786961

Cited by 111 publications

(65 citation statements)

References 29 publications

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“…Received backscattered electromagnetic field after frequency down-conversion and low-pass filtering is given as [10,11] 2 ( ) ( ) i kd t r E t re (1) is the vacuum wavelength). For normal incidence 1 1 r (2) f the reflected field contains time-dependent vibration displacement d(t). We can define the reflection loss …”

Section: Reflection Lossesmentioning

confidence: 99%

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Long-range monostatic remote sensing of geomaterial structure weak vibrations

Heifetz¹,

Bakhtiari²,

Gopalsami³

et al. 2018

AIP Conference Proceedings

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Abstract.We study analytically and numerically signal sensitivity in remote sensing measurements of weak mechanical vibration of structures made of typical construction geomaterials, such as concrete. The analysis includes considerations of electromagnetic beam atmospheric absorption, reflection, scattering, diffraction and losses. Comparison is made between electromagnetic frequencies of 35GHz (Ka-band), 94GHz (W-band) and 260GHz (WR-3 waveguide band), corresponding to atmospheric transparency windows of the electromagnetic spectrum. Numerical simulations indicate that 94GHz frequency is optimal in terms of signal sensitivity and specificity for long-distance (>1.5km) sensing of weak multi-mode vibrations.

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Section: Reflection Lossesmentioning

confidence: 99%

“…The capability to perform long-distance vibration measurements on structural elements is important in a number of applications [1][2][3]. Monostatic remote sensing of vibrations can be accomplished via detection and analysis in frequency domain of Doppler-shifted backscattered electromagnetic (EM) wave [4,5].…”

Section: Introductionmentioning

confidence: 99%

Long-range monostatic remote sensing of geomaterial structure weak vibrations

Heifetz¹,

Bakhtiari²,

Gopalsami³

et al. 2018

AIP Conference Proceedings

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“…There are two types of ground-based radar interferometry approaches for deformation monitoring: one is the Ground-Based SAR Interferometry (GB-InSAR) to perform static measurements [10,37]; the other is GB-InRAR for dynamic measurements, such as structural vibration monitoring [38][39][40][41] (in this paper, we write "Ground-Based Real Aperture Radar Interferometry" as GB-InRAR for short).…”

Section: Ground-based Radar Interferometry Measurementsmentioning

confidence: 99%

Differential Radar Interferometry for Structural and Ground Deformation Monitoring: A New Tool for the Conservation and Sustainability of Cultural Heritage Sites

2015

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Abstract:Affected by natural and human-induced factors, cultural heritage sites and their surroundings face threats of structural instability and land displacement. Accurate and rapid identification of the key areas facing existing or potential deformation risks is essential for the conservation and sustainability of heritage sites, particularly for huge archaeological regions. In recent years, the successful application of differential radar interferometry techniques for the measurement of millimeter-level terrain motions has demonstrated their potential for deformation monitoring and preventive diagnosis of cultural heritage sites. In this paper, we review the principles of advanced differential radar interferometry approaches and their applicability for structural and ground deformation monitoring over heritage sites. Then, the advantages and challenges of these approaches are analyzed, followed by a discussion on the selection of radar interferometry systems for different archaeological applications. Finally, a workflow, integrating space-borne and ground-based differential radar interferometry technologies for deformation anomaly monitoring and preventive diagnosis of cultural heritage sites, is proposed.

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“…The use of interferometric radar sensors, namely RealAperture-Radar (RAR) interferometry, consolidated in the last decade as an operational tool for the monitoring of large civil engineering structures as bridges, towers, and buildings: for an exhaustive bibliography on the topic see [1]. Although the accuracy of a radar estimate of displacement, usually of the order of tens of microns, cannot be comparable with that of optical systems, as Laser Doppler vibrometers, a microwave sensor is able to provide data with a negligible effect of the atmospheric propagation, weather conditions, and from distance up to one kilometre.…”

Section: Introductionmentioning

confidence: 99%

An interferometric radar sensor for monitoring the vibrations of structures at short ranges

et al. 2018

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Abstract. The Real-Aperture-Radar (RAR) interferometry technique consolidated in the last decade as an operational tool for the monitoring of large civil engineering structures as bridges, towers, and buildings. In literature, experimental campaigns collected through a well-known commercial equipment have been widely documented, while the cases where different types of sensors have been tested are a few. On the bases of some experimental tests, a new sensor working at high frequency, providing some improved performances, is here discussed. The core of the proposed system is an off-the-shelf, linear frequency modulated continuous wave device. The development of this apparatus is aimed at achieving a proof-of-concept, tackling operative aspects related to the development of a low cost and reliable system. The capability to detect the natural frequencies of a lightpole has been verified; comparing the results of the proposed sensor with those ones obtained through a commercial system based on the same technique, a more detailed description of the vibrating structure has been achieved. The results of this investigation confirmed that the development of sensors working at higher frequencies, although deserving deeper studies, is very promising and could open new applications demanding higher spatial resolutions at close ranges.

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Monitoring of Civil Infrastructures by Interferometric Radar: A Review

Cited by 111 publications

References 29 publications

Long-range monostatic remote sensing of geomaterial structure weak vibrations

Long-range monostatic remote sensing of geomaterial structure weak vibrations

Differential Radar Interferometry for Structural and Ground Deformation Monitoring: A New Tool for the Conservation and Sustainability of Cultural Heritage Sites

An interferometric radar sensor for monitoring the vibrations of structures at short ranges

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