SH0type guided wave transducer based on Ca2Al2SiO7piezoelectric crystal for higherature structure health monitoring

Abstract

The development of higherature guided wave transducers for higherature structure health monitoring is of great interest in many aspects of industrial engineering. In this work, the zero-order shear horizontal (SH0) guided wave transducer was designed and analyzed based on the X-plate from Ca2Al2SiO7 (CAS) crystals. Furthermore, the excitation and reception performances were evaluated. It is determined from the finite element simulation that the CAS-based guided wave transducer can excite pure SH0 waves in a specific direction. Experimental results confirmed that pure SH0 waves could be achieved and received by the designed CAS-based transducer, which is in good agreement with the theoretical study. Strong SH0 wave signals were chosen at elevated temperatures, and a moderate signal-to-noise ratio >12 dB was realized at the high temperature of 600 °C, showing the advantages of a CAS-based transducer for higherature sensing application.