Abstract
Cymbal transducers are characterized by a high mechanical quality factor and low power efficiency. The research conducted so far on cymbal transducers has focused on improving the power efficiency and structural stability, but modern underwater sensor network systems need transducers to have a wide frequency bandwidth as well. In this study, a wideband cymbal transducer was designed to fill that need. First, the effect of various structural parameters on the performance of the cymbal transducer was analyzed with emphasis on the bandwidth using the finite element method. Based on the analysis results, the structure of the cymbal transducer was optimized to have the widest possible bandwidth while maintaining its transmitting voltage response (TVR) level over a typical power requirement as well. The validity of the design was verified by fabricating a prototype of the optimized cymbal transducer and comparing its measured performance with the design.
Highlights
Underwater sensor network (UWSN) technology enables underwater exploration by combining sensor technology with wireless technology, smart sensing, intelligent computing, and communication functions
The sensor nodes in these applications are acoustic transducers; high-performance acoustic transducers are essential to the proper operation of the UWSN
We developed a wideband cymbal transducer that could maintain its transmitting voltage response (TVR) level over a typical power requirement as well
Summary
Underwater sensor network (UWSN) technology enables underwater exploration by combining sensor technology with wireless technology, smart sensing, intelligent computing, and communication functions. UWSN uses 1D communication between sensor nodes fixed in water, 2D communication between gateway nodes and fixed nodes in water, 3D communication between nodes having different fixed-position depths, and 4D communication with movable sensor nodes [1]. This technology can be applied to various fields such as gas extraction, military surveillance, natural disaster forecasting, marine life habitat monitoring, and marine aquaculture [2]. The broadband characteristics of acoustic transducers enable mass data transmission in underwater communication systems and improve detection accuracy in sonar systems
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