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A microwave interferometer with imaging capability for remote measurements of building displacements

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Abstract

In this paper the authors report some experimental activities carried out in Italy during the last few years, aimed at verifying the effectiveness of the use of coherent radar imaging to retrieve information on buildings deformations. Maps of differential phase obtained by means of a microwave interferometer with imaging capabilities are presented. Images were obtained by a synthetic-aperture interferometric radar making use of continuous-wave step-frequency waveform. The deformation maps and the measurement of some mechanical parameters—as the oscillating frequency and the amplitude of the vibrating modes of the observed structures—were performed remotely with sub-millimetre accuracy.

Résumé

Dans cet article, les auteurs rapportent l'analyse de quelques activités expérimentales effectuées en Italie au cours de ces dernières années, pour vérifier l'efficacité de l'utilisation d'images radar cohérentes pour mesurer les déformations de bâtiments. On va présenter des cartes de la phase différentielle obtenues à l'aide d'un interféromètre à micro-ondes avec des capacités d'imagerie. Des images sont obtenues à partir d'un radar interférométrique à ouverture synthétique et à onde continue (forme d'onde: step-frequency). La mesure des paramètres mécaniques comme fréquence d'oscillation et la phase des modes vibrants des structures observées ont été expérimentées à distance avec une exactitude supérieure au millimètre.

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Authors and Affiliations

  1. University of Florence, Firenze, Italy

    M. Pieraccini, G. Luzi, D. Mecatti & C. Atzeni

  2. Enel-Hydro S.p.A., Seriate (BG), Italy

    L. Carissimi & G. Franchioni

Authors
  1. M. Pieraccini
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  2. G. Luzi
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  3. D. Mecatti
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  4. L. Carissimi
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  5. G. Franchioni
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  6. C. Atzeni
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Pieraccini, M., Luzi, G., Mecatti, D. et al. A microwave interferometer with imaging capability for remote measurements of building displacements. Mat. Struct. 38, 795–800 (2005). https://doi.org/10.1007/BF02481651

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  • DOI: https://doi.org/10.1007/BF02481651

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