Luzi Guido, Crosetto Michele, Fernández Enric
Centre Tecnòlogic de Telecomunicaciòns de Catalunya (CTTC/CERCA), Geomatics Division, Avinguda Gauss, 7, E-08860 Castelldefels (Barcelona), Spain.
Sensors (Basel). 2017 Mar 24;17(4):669. doi: 10.3390/s17040669.
The potential of a coherent microwave sensor to monitor the vibration characteristics of civil structures has been investigated in the past decade, and successful case studies have been published by different research teams. This remote sensing technique is based on the interferometric processing of real aperture radar acquisitions. Its capability to estimate, simultaneously and remotely, the displacement of different parts of the investigated structures, with high accuracy and repeatability, is its main advantage with respect to conventional sensors. A considerable amount of literature on this technique is available, including various case studies aimed at testing the ambient vibration of bridges, buildings, and towers. In the last years, this technique has been used in Spain for civil structures monitoring. In this paper, three examples of such case studies are described: the monitoring of the suspended bridge crossing the Ebro River at Amposta, the communications tower of Collserola in Barcelona, and an urban building located in Vilafranca del Penedès, a small town close to Barcelona. This paper summarizes the main outcomes of these case studies, underlining the advantages and limitations of the sensors currently available, and concluding with the possible improvements expected from the next generation of sensors.
在过去十年中，人们对相干微波传感器监测土木结构振动特性的潜力进行了研究，不同的研究团队也发表了成功的案例研究。这种遥感技术基于真实孔径雷达采集数据的干涉测量处理。它能够同时远程高精度、可重复地估计被研究结构不同部位的位移，这是其相对于传统传感器的主要优势。关于该技术有大量的文献，包括各种旨在测试桥梁、建筑物和塔楼环境振动的案例研究。近年来，这项技术已在西班牙用于土木结构监测。本文描述了三个此类案例研究的例子：对安波斯塔横跨埃布罗河的悬索桥、巴塞罗那科尔塞罗拉的通信塔以及位于巴塞罗那附近小镇比拉弗朗卡德尔佩内德斯的一座城市建筑的监测。本文总结了这些案例研究的主要成果，强调了现有传感器的优缺点，并对下一代传感器可能带来的改进进行了总结。
