Piezoelectric Wafer Active Sensor Transducers for Acoustic Emission Applications

Piezoelectric materials are defined by their ability to display a charge across surface in response mechanical strain, making them great for use sensing applications. Such applications include pressure sensors, medical devices, energy harvesting and structural health monitoring (SHM). SHM describes the process of using systematic approach identify damage engineering infrastructure. A method that uses piezoelectric wafers connected directly structure has become increasingly popular. An investigation novel pitch-catch determining instrumentation quality wafer active sensors (PWASs) used was conducted as well an into effects defects sensor bonding on response. This able verify defect-less pristinely bonded PWASs. Additionally, compared with electromechanical impedance instrumentation. Using method, it found defective resulted decreasing amplitude received transmitted signals changes frequency spectrums signals, such elimination high peaks those layer increased around 600 kHz broken PWAS. The concluded increase primary peak’s cause downward shift both secondary spectrum, while peak reduced shifting upward nearly eliminating peak.