Study on machining phenomena by acoustic comb type digital AE sensor using LiNbO₃

-About the design, manufacture and verification of the developed sensor-

Abstract

Detection of acoustic emission (AE), which is defined as transient elastic waves within a material caused by the rapid release of a strain is essential for applications in in-situ and nondestructive monitoring of various conditions in materials. The objective of this research is to develop a digital AE sensor used by LiNbO₃ and composed of an array of piezoelectric cantilevers having different resonant frequencies for dividing AE signals into each frequency domain and characterizing the signals. This paper reports the design and simulation method and outline of the acoustic-com type AE sensor used by LiNbO₃ material for the digital detection of AE waves.