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Pulse Echo and Resonance Spectroscopy (PEARS)

Technology Category: Stress Analysis (vibration analysis)

Description: Pacific Northwest National Laboratory (PNNL) investigated the feasibility of integrating Ultrasonic Pulse Echo and Acoustic Resonance Spectroscopy technologies as a nondestructive evaluation technique for determining the contents of containers. The resulting PEARS equipment discriminates between objects based on their vibrational characteristics. ANSYS finite element analyses were conducted to gain a better understanding of the effect of fluid density, sonic velocity, and fill level on the vibrational response of different types of containers. Modal analyses were conducted to examine the interaction between the fluid and the container. Harmonic analyses were conducted to determine the resonant frequencies, amplitudes and sharpness (Q) of the resonant peaks.

Point of Contact: John Deibler (509) 375-3790, Moe Khaleel (509) 375-2438