Study of Sensitivity and Repeatability of Piezoelectric Sensors
- Physics and Chemistry of Solids Group, Cavendish Laboratory, Cambridge, CB3 0HE (United Kingdom)
The sensitivity and repeatability of stress and density measurements obtained using commercially available piezoelectric probes have been studied for high-velocity (> 450 m s-1) gas gun-driven spray experiments. The probes used are Dynasen Piezopins, in which the sensor element is a small ((0.4 {+-} 0.05) mm thick, (1.2 {+-} 0.1) mm diameter) PZT (Lead Zirconate Titanate) disk. The probe gives an output voltage V(t) proportional to the time derivative of the force normal to the poled axis of the PZT. The stress level is obtained using the time-integrated voltage. It is assumed that there is complete momentum transfer between the spray and the Piezopin, therefore the spray density can be found from the stress level. The spray is produced by accelerating aluminum powder (10 {mu}m grain size) in a gas gun. Spray density measurements are compared with values measured from x-ray images, and stress measurements are compared with extrapolated values from the spray densities obtained from the x-ray images.
- OSTI ID:
- 20875687
- Journal Information:
- AIP Conference Proceedings, Vol. 845, Issue 1; Conference: American Physical Society Topical Group conference on shock compression of condensed matter, Baltimore, MD (United States), 31 Jul - 5 Aug 2005; Other Information: DOI: 10.1063/1.2263538; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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