Single-Element Omnidirectional Piezoelectric Ultrasound Transducer for under Water Communication

Abstract

This paper presents the design and fabrication procedure of a single-element omnidirectional piezoelectric ultrasound transducer, which can be utilized for under water communication. The transducer consists of a spherical silicon infiltrated silicon carbide (Si-SiC) body and is able to perform communication at 160 kHz with a Q factor of about 5.6 over a distance of more than one meter. The circumferential pressure amplitude of the beam pattern of the transducer varies less than 10 dB, which allows reliable communication between different transducers at an arbitrary orientation with respect to each other.

PMUTs Array with Dynamic Directivity: A Study of its Underwater Acoustic Power Intensity

“…5 shows the beam pattern of the omnidirectional and directional 6 × 6 arrays with d/λ = 0.052 and d/λ = 0.26, respectively. The result is compared with the FEM simulation results and analytical results obtained from (2).…”

“…makes it a promising alternative to electromagnetic wave communication. Therefore, ultrasound is commonly used in many applications and different environments; from in-body medical imaging to in-air range finding and underwater acoustic sensor network (UASN) applications [1], [2]. Among different ultrasound transducer technologies, piezoelectric micromachined ultrasound transducer (PMUTs) are a promising alternative to conventional ones.…”

Resonating Shell: A Spherical-Omnidirectional Ultrasound Transducer for Underwater Sensor Networks

“…For specific USN applications, such as the sensory exploration of hard-to-reach underwater or in-oil environments, small size nodes with limited power budget are indispensable [ 7 ]. The main objective for these applications is to provide devices that can operate in water distribution systems or other hard-to-reach environments [ 8 ].…”

Optimization in the Design and Fabrication of a PZT Piezoelectric Micromachined Ultrasound Transducer (PMUT)

“…In recent years, there has been increased interest in piezoelectric micromachined ultrasound transducers (PMUTs) in many applications, such as bio-medical ultrasonic imaging, finger print sensors, and range finders [1][2][3]. Lead zirconate titanate (PZT), because of its high piezoelectric coefficient and relatively easy deposition process, is the most common piezoelectric thin-film.…”