This article proposes an ultrasonic sensor inspired by the shape of a bat's cochlea, which is part of one of the most sophisticated echolocation systems to be found among mammals. In this case, polyvinylidene fluoride (PVDF) was used for the fabrication of the sensor, which is manufactured by folding a sheet of the piezopolymer according to a logarithmic spiral geometry. It is characterized by a very broad frequency band, in agreement with numerical simulations and impedance analyses, and has a uniform radiation pattern both on the horizontal and vertical planes. The sensitivity of the sensor was evaluated in the range between 30–95 kHz, a well–suited frequency band for most bio–systems.
Bioinspired US sensor for broadband applications
Fiorillo A. S.;Pullano S. A.;Bianco M. G.;Critello C. D.
2019-01-01
Abstract
This article proposes an ultrasonic sensor inspired by the shape of a bat's cochlea, which is part of one of the most sophisticated echolocation systems to be found among mammals. In this case, polyvinylidene fluoride (PVDF) was used for the fabrication of the sensor, which is manufactured by folding a sheet of the piezopolymer according to a logarithmic spiral geometry. It is characterized by a very broad frequency band, in agreement with numerical simulations and impedance analyses, and has a uniform radiation pattern both on the horizontal and vertical planes. The sensitivity of the sensor was evaluated in the range between 30–95 kHz, a well–suited frequency band for most bio–systems.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
