We’re currently analyzing bridges mostly with low frequency acceleration sensors and with strain sensors. The upcoming project for which the job offer exists will also make use of mobile high precision radar equipment to attempt installation free analysis.
The events we are recoding are crossings by single vehicles of unknown weight. For one specific bridge for which we have simulated (lots) and real (ca 100 crossings) data, we have been able to detect the damages and even pinpoint their location to some degree.
We were actually permitted to damage the bridge during the process, so we introduced real damages of increasing severity (at the end of which the bridge was demolished and replaced by a new one). The next project will have multiple bridges of different designs that will again be analyzed via attached sensors, radar sensors and simulations.