ABSTRACT
New technology for continuous and accurate monitoring of bridges is presented. The technology is based on radio interferometry and allows bridge deformation monitoring with down to sub-millimeter accuracy over spans of several hundreds of meters in all weather conditions. As the technology allows affordable 24/7 3D monitoring of both slow changes over years as well as accurate characterization of vibration modes, it is a suitable data source for digital twins and bridge condition evaluation through data analysis techniques including artificial intelligence. This paper presents a case study where the system has been installed on a 220-meter suspension bridge. The basic operation of the technology and the deployment configuration on the bridge are described. The performance of the system is analyzed and compared against an optical reference measurement system. Finally, the suitability of the new monitoring technology for different bridge types is discussed.
