Journal
2021 INTERNATIONAL CONFERENCE ON E-HEALTH AND BIOENGINEERING (EHB 2021), 9TH EDITION
Volume -, Issue -, Pages -Publisher
IEEE
DOI: 10.1109/EHB52898.2021.9657692
Keywords
Sensor interface; Ultrasonic transducer; PVDF; voltage conveyor
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The study introduces a biologically inspired ultrasonic transducer with wideband and directional characteristics for developing a broadband system in-air. It also utilizes spiral-shaped PVDF transducers and VCII electronic interfaces for generating and receiving ultrasounds with a bandwidth larger than 60 kHz.
In-air ultrasonic transducers are mostly characterized by a narrow frequency band, which limits the performances of sonar systems. Broadband transducers are widely investigated, but it still represents a technological bottle neck. Recently, we proposed a biologically inspired ultrasonic transducer, with interesting characteristics in terms of bandwidth and directionality. Considering the above, standard electronics can be revisited using alternative approaches. The work presents the development a broadband system for the generation/reception of ultrasounds in-air. It is based on spiral shaped, polyvinylidene-fluoride (PVDF) broadband transducers for the generation and reception ultrasounds in air, and second-generation voltage conveyor (VCII) based electronic interfaces in transmission and reception. The latter exploits their inherent broadband characteristics and the capability of working in voltage and current mode, to operate with a bandwidth larger than 60 kHz.
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