Concrete Crack Damage Location Based on Piezoelectric Composite Acoustic Emission Sensor

It is significant to use acoustic emission technology to study crack damage location of concrete. In order to study concrete crack damage of linear positioning, pencil lead broken method was used to simulate crack initiation in concrete with affixed and embedded acoustic emission sensors manufactured by 1–3-type piezoelectric composite material. The results show that the accuracy of embedded sensors can reach above 95 %, which is higher than that of the affixed sensors. Moreover, it is easier to operate and suitable for special environment monitoring of buildings using embedded sensors to monitor the random crack of the concrete. This research provides a theoretical basis for concrete crack damage monitoring with acoustic emission technology.