Remote Survey of the Leaning Tower of Pisa by Interferometric Sensing

Atzeni, C.; Bicci, Alberto; Dei, Devis; Fratini, Matteo; Pieraccini, Massimiliano

doi:10.1109/lgrs.2009.2030903

Cited by 68 publications

(55 citation statements)

References 12 publications

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“…The system can be used with various antennas to better adapt the measuring conditions to different geometries and monitored surfaces. The radar has been used since many years by many researches to carry out monitoring different structures This apparatus has been used to measure the dynamic response of a variety of structures, such as bridges [9], wind farms [10], buildings [11] and towers [12], [13]. 2 The novel apparatus…”

Section: A Commercial Systemmentioning

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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Section: A Commercial Systemmentioning

confidence: 99%

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

et al. 2018

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“…This radar sensor is an industrially engineered microwave interferometer used in the last decade in several vibration testing studies. An exhaustive description of the functioning principle was done by Gentile & Cabboi [15]; for examples of applications to different structures testing, see: [16], [17], [18].…”

Section: 1-experimental Setupmentioning

confidence: 99%

Parametric Study of the Errors Obtained from the Measurement of the Oscillating Movement of a Bridge Using Image Processing

2016

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The movement of a pedestrian bridge retrieved by means of image processing technique has been analysed in this paper. An optical target has been attached to the deck and its oscillation has been tracked with fast cameras. The movement of the bridge has also been measured with a radar interferometer and this result has been taken as the reference signal. Using these data, a parametric study of the errors introduced by the image-based methods has been performed. The influence of some variables in the measurement error such as the distance to the target, the image size, the type of camera or the movement amplitude has been analysed for four different distances, and two types of excitations. Results show that the relative error decreases with the amplitude and the target diameter and it increases with the target distance. Additionally, the maximum relative error obtained in most of the analysed cases is below 10%.

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“…Several authors observe that the interferometric technique has proven to be a useful remote sensing tool for vibration measurements of structures, such as architectural heritage structures [4][5][6], engineering infrastructures [7,8], and vibrating stay cables [9,10]. This radar technology is founded on the combined use of highresolution waveforms [11] and interferometric technique [12].…”

Section: Instrumental Features Of the Ibis-s Technologymentioning

confidence: 99%

Fast Dynamic Control of Damaged Historical Buildings: A New Useful Approach for Structural Health Monitoring after an Earthquake

Calcina

Piroddi

Ranieri

2013

ISRN Civil Engineering

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The structures damage conditions assessment requires numerous precautions to ensure the safety of people during site visits and inspections. Among several methods providing useful information about the conservation status of the structures, dynamic monitoring techniques are suitable to retrieve the global behavior of the buildings. The anomalous features diagnosis of the structural dynamic response is an index of alterations of the material state and, in the worst cases, is related to the presence of damaged structural elements. This paper proposes the use of remote control systems for the structural evaluation of the damage state of buildings and describes the results achieved in an interesting application: the experimental dynamic analysis carried out on the inaccessible damaged bell tower of the Church of Santi Giacomo and Filippo in Mirandola (Italy). The study is based on observations performed using the IBIS-S ground-based radar interferometer to remotely measure the displacements of several elements of the building above 0.01 mm amplitude. This totally noninvasive and nondestructive approach has proved to be reliably implemented as a useful method to structural health monitoring procedures and especially for extensive and fast inspection analyses aiming at the first evaluation of the damage level and the soundness of slender buildings after earthquakes.

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Remote Survey of the Leaning Tower of Pisa by Interferometric Sensing

Cited by 68 publications

References 12 publications

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

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

Parametric Study of the Errors Obtained from the Measurement of the Oscillating Movement of a Bridge Using Image Processing

Fast Dynamic Control of Damaged Historical Buildings: A New Useful Approach for Structural Health Monitoring after an Earthquake

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