Study on Acoustic Emission of 1 -3 Orthotropic Cement Based Piezoelectric Sensors

摘要

1-3 orthotropic cement based piezoelectric composites were fabricated by cut-filling and arrange-filling technique, using PZT-51 ceramic as functional material and cement as passive matrix. 1-3 orthotropic cement based piezoelectric composites were prepared into Acoustic Emission (AE) sensors, the attenuation of AE signal on the concrete and the response of different sensors on the concrete with increasing distance were researched. The results showed that the signal strength received by sensing element increases with the increasing PZT volume fraction;;signal peaks and amplitude decrease gradually when the testing distance increases;;signal strength received on the ceramic title is stronger than on the concrete;;the attenuation of signal wave shape received on the concrete is much slower when compared with ceramic title.