A system using a piezoelectric polymer transducer for acoustic imaging of amplitude and phase differences in air

摘要

The acoustic impedance of piezoelectric polymers is one order of magnitude smaller than that of piezoelectric ceramics such as lead zirconate titanate (PZT). Therefore, the transducer matching loss between a transducer and an object is greatly reduced using piezoelectric polymer*. Poly (vinyl-idene fluoride) (PVDF) is the best-known piezoelectric polymer. In particular, copolymer of vinylidene fluoride and trifluoroethylene [P(VDF/TrFE)] has the largest coupling.