Kongsberg Maritime Sensors & Robotics, Strandpromenaden 50, 3183 Horten, Norway; University of South-Eastern Norway, Raveien 215, 3184 Borre, Norway.
Kongsberg Maritime Sensors & Robotics, Strandpromenaden 50, 3183 Horten, Norway.
Ultrasonics. 2022 Sep;125:106794. doi: 10.1016/j.ultras.2022.106794. Epub 2022 Jun 16.
A single crystal/epoxy 1-3 composite plate transducer with air backing and two acoustic matching layers was modelled, fabricated and compared to a similar PZT transducer. For the relevant underwater applications, the usable frequency band is restricted by reactive electrical power. The design goal was to provide an underwater transmitter that could be operated over a wide range of frequencies, but not necessarily create a single pulse spanning the entire frequency band. The thicknesses and the characteristic acoustic impedances of the matching layers were therefore optimized for a wide passband rather than a maximally flat passband. The resulting single crystal transducer had reactive power below 50 % in a frequency band 132 % wide relative to the center frequency.
设计并制作了具有空气背衬和两个声学匹配层的单晶/环氧 1-3 复合板换能器，并与类似的 PZT 换能器进行了比较。对于相关的水下应用，可用的频带受到无功功率的限制。设计目标是提供一种水下发射器，可以在很宽的频率范围内工作，但不一定能产生跨越整个频带的单个脉冲。因此，匹配层的厚度和特性声阻抗经过优化，以获得较宽的通带，而不是最平坦的通带。所得单晶换能器在相对于中心频率带宽为 132%的频带内的无功功率低于 50%。
