Fast Track Ultrasonic Imaging of Concrete Bridge Decks Using Roller Type Array Transducers

Innovative and low cost methods for concrete bridge deck assessment are sought to implement in the Long-Term Infrastructure Performance (LTIP) programs. The new evaluation tools and methods to be used especially in field data collection must exhibit certain features such as elimination of traffic lane closures, assessment of bare concrete bridge decks as well as decks with overlay, reduced number of field personnel and ability to evaluate more bridges in shorter time periods. In response to these requirements, Transtek International Group (TIG) research team proposes a new methodology that utilizes ultrasonic array based imaging technology which will be mounted on a vehicle in the size of a golf cart. A multi-channel ultrasonic data acquisition system and processing hardware with Internet of Things (IoT) features will be mounted on the vehicle while ultrasonic array sensors are installed inside the cylindrical wheels. When the vehicle cruses over a bridge at a normal speed, images are simultaneously collected from the bridge lane. The data acquisition system will include advanced signal processing algorithms which are a combination of space diversity algorithm known as Adaptive Total Focus Method (ATFM) and frequency diversity method Split Spectrum Processing algorithm; these algorithms will provide better interpretation of collected data