Dynamic Monitoring of Bridges Using a High-Speed Coherent Radar

Pieraccini, Massimiliano; Fratini, Matteo; Parrini, F.; Atzeni, C.

doi:10.1109/tgrs.2006.879112

Cited by 83 publications

(69 citation statements)

References 10 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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“…The instrument is basically a coherent radar which means that it is able to acquire both the amplitude and the phase of the received electromagnetic signals echoed by detected targets. The instrument is equipped with two transmit-receive horn antennas and operate at microwave frequency according to a technique referred to as continuous-wave step-frequency (CWSF) [4]. Suitable processing of the acquired data provides a mono-dimensional range image of the scenario of interest.…”

Section: The Interferometric Sensormentioning

confidence: 99%

“…For these reasons, although a displacement sensor can provide information exclusively in a low frequency band, the measurement was performed by using a remote/contactless sensor based on microwave interferometry. The sensor, that has been designed by the authors and employed in a number of previous experimental applications [4][5][6][7], avoids the costly, time consuming and not always implementable operations required with conventional sensors installed directly on a structure.…”

Section: Introductionmentioning

confidence: 99%

Assessment of vibration reduction on the Baptistery of San Giovanni in Florence (Italy) after vehicular traffic block

Fratini¹,

Pieraccini²,

Atzeni³

et al. 2011

Journal of Cultural Heritage

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“…These devices can be used to no contact measure of both small and large displacements. Their accuracy and dynamic range is also high [8][9][10][11] and thus, they can be used in a high variety of applications [12][13][14]. Unfortunately, these devices tend to be very expensive, what makes that they are not cost-effective for many applications.…”

Section: Monitoring Of Vibrations and Displacements Of Structures Undmentioning

confidence: 99%

Optical Scanning for Structural Vibration Measurement

Espinosa

Pérez

Ivorra

et al. 2011

URND

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High speed cameras are often used for monitoring impacts and fast dynamic processes on structures. However, quantitative information about these processes is usually obtained through other means like accelerometers or Doppler vibrometers. In this paper, we show that a proper arrangement of the experiment and the camera allows non contact measurement of the characteristics of the main displacement mode (amplitude, frequency and attenuation). An application is given for the analysis of structure damages after low speed car impacts. The method is low cost, fast and accurate, and it permits direct visualization and measurement of the movement of the vibrating body. KEYWORD

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Dynamic Monitoring of Bridges Using a High-Speed Coherent Radar

Cited by 83 publications

References 10 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

Assessment of vibration reduction on the Baptistery of San Giovanni in Florence (Italy) after vehicular traffic block

Optical Scanning for Structural Vibration Measurement

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