A Comparison of the Underwater Acoustic Performance of Single Crystal vs. Piezoelectric Ceramic based Cymbal Projectors
نویسندگان
چکیده
The underwater acoustic performance of three same-design ‘cymbal’ based electro-acoustic projectors are compared. Two of these projectors contain PMN-PT single crystal piezoelectric as the active material while the third utilizes conventional PZT-5H piezoelectric ceramic. The units containing the single crystal material show an improvement in the acoustic source level anywhere from 3 to 15 dB over the frequency band 1-25 kHz. The higher source level is a consequence of the higher drive voltage capability of the single crystal materials. Under appropriate drive conditions, a single crystal cymbal-based projector that is 64 mm thick with an acoustic aperture of 101 mm X 101 mm can generate an acoustic source level of at least 175 dB (re: 1 μPa @ 1 m) from ~ 3 kHz to > 25 kHz.
منابع مشابه
بررسی کوپلینگ پیزوالکتریکی و آنیزتروپی بر انتشار امواج صوتی در بلوره صوتی لیتیوم نیوباته
The acoustic wave velocity depends on elasticity and density at most materials, but because of anisotropy and especially piezoelectric coupling effect, the acoustic wave propagation at piezoelectric based crystalloacoustic materials, is an applied and challenging problem. In this paper, using modified Christoffel's equation based on group velocity concept, the effect of anisotropy and piezoelec...
متن کاملTransducer performance with segmented piezoelectric stacks using materials having high coupling coefficient
Underwater acoustic transducers often include a stack of thickness polarized piezoelectric material pieces of alternating polarity interspersed with electrodes and bonded together. The stack is normally much shorter than a quarter wavelength at the fundamental resonance frequency, so that the mechanical behavior of the transducer is not affected by the segmentation. When the transducer bandwidt...
متن کاملlOW-COST ACOuSTIC TRANSmITTER fOR uNDERWATER SEN- SOR NETWORkS
Currently, there is a lag in the proliferation of underwater sensors due to the lack of low cost acoustic transmitters. The high cost of acoustic modems and some of their characteristics, make them inappropriate for many scenarios where low power and short range communications are required. This paper presents the design and the details of a low-cost acoustic transmitter for underwater sensors....
متن کاملParallel implementation of underwater acoustic wave propagation using beamtracing method on graphical processing unit
The mathematical modeling of the acoustic wave propagation in seawater is the basis for realizing goals such as, underwater communication, seabed mapping, advanced fishing, oil and gas exploration, marine meteorology, positioning and explore the unknown targets within the water. However, due to the existence of various physical phenomena in the water environment and the various conditions gover...
متن کاملSol-Gel Synthesis and Piezoelectric and Structural Properties of Zr –rich PZT Nanoparticles
Lead zirconate titanate (PZT) nanopowders with spherical-shaped morphology, perovskite structure and an average size of 20 nm were successfully synthesized. The prepared PZT nanopowders were characterized by differential thermal analysis (DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy dispersive X-ray (EDS) and Transmission electron microscopy (TEM) technique. Single-...
متن کامل