Pullano Salvatore A, Fiorillo Antonino S, Barile Gianluca, Stornelli Vincenzo, Ferri Giuseppe
Department of Health Sciences, Faculty of Medicine and Surgery, University "Magna Græcia" of Catanzaro, 88100 Catanzaro, Italy.
Department of Industrial and Information Engineering and Economics (DIIEE), Faculty of Engineering, University of L'Aquila, 67100 L'Aquila, Italy.
Micromachines (Basel). 2021 Jan 20;12(2):99. doi: 10.3390/mi12020099.
Exploiting the transmission and reception of low frequency ultrasounds in air is often associated with the innate echolocating abilities of some mammals, later emulated with sophisticated electronic systems, to obtain information about unstructured environments. Here, we present a novel approach for the reception of ultrasounds in air, which exploits a piezopolymer broadband sensor and an electronic interface based on a second-generation voltage conveyor (VCII). Taking advantage of its capability to manipulate both voltage and current signals, in this paper, we propose an extremely simple interface that presents a sensitivity level of about -100 dB, which is in line with commercially available references. The presented results are obtained without any filtration stage. The second-generation voltage conveyor active device is implemented through a commercially available AD844, with a supply voltage of ±15 V.
利用空气中低频超声波的发射和接收通常与某些哺乳动物的先天回声定位能力相关，后来通过复杂的电子系统进行模拟，以获取有关非结构化环境的信息。在此，我们提出一种在空气中接收超声波的新颖方法，该方法利用压电聚合物宽带传感器和基于第二代电压传输器（VCII）的电子接口。利用其操纵电压和电流信号的能力，在本文中，我们提出了一种极其简单的接口，其灵敏度水平约为-100 dB，与市售参考产品一致。所呈现的结果是在没有任何滤波阶段的情况下获得的。第二代电压传输器有源器件通过市售的AD844实现，电源电压为±15V。
