| Design optimization for a piezoelectric transducer is predicated upon a thorough understanding of the individual components that make up the system. One such component is the piezoelectric element itself, whose most significant characteristic parameter is the charge coefficient. The charge coefficient, d33, has been measured experimentally via two test methods for tourmaline, lead titanate zirconate and bismuth titanate crystals possessing cylindrical geometry. The first test method utilized an impedance analyzer coupled with a proposed theoretical model, and the second test method utilized an electrodynamic shaker which was considered the standard for purposes of comparison evaluation. Test results indicate a correlation between the two test methods for the above mentioned piezoelectric elements. The use of the impedance analyzer test method to measure the charge coefficient, d 33, is proved to be a viable option for the selection of individual piezoelectric elements in an industrial production line. |
