抄録
Time reversal processing for the measured sensor signal can be applied to detect not only structural damage but also impact loading of the structure. After measuring the electrical sensor signals corresponding to scattered wave filed of the plate in experimentally, the time reversal processing is applied to the measured signals in the numerical wave back propagation simulation for localizing the impact loading point on the plate. The time-reversed wave travels back through the plate and is focused on the region around a point where hit by the impact hammer. Effect of the number of surface bonded piezoceramic sensors on the quality of the impact identification is experimentally investigated here.
