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A Second-Generation Voltage-Conveyor-Based Interface for Ultrasonic PVDF Sensors.

Salvatore A Pullano1, Antonino S Fiorillo1, Gianluca Barile2

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Summary

This study introduces a new method for receiving low-frequency ultrasound signals using a piezopolymer sensor and a voltage conveyor (VCII) interface. This simple electronic system achieves high sensitivity without filtering, advancing ultrasound reception technology.

Keywords:
PVDFsensor interfaceultrasonic transducervoltage conveyor

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Area of Science:

  • Acoustics and Signal Processing
  • Electronic Engineering
  • Materials Science

Background:

  • Mammalian echolocation utilizes low-frequency ultrasound reception for environmental sensing.
  • Existing electronic systems for ultrasound reception often require complex designs and filtration.
  • Piezopolymer sensors offer broadband capabilities for ultrasound detection.

Purpose of the Study:

  • To develop a novel, simplified electronic interface for receiving low-frequency ultrasound in air.
  • To demonstrate the effectiveness of a second-generation voltage conveyor (VCII) in ultrasound signal processing.
  • To achieve high sensitivity in ultrasound reception without employing filtration stages.

Main Methods:

  • Utilized a piezopolymer broadband sensor for ultrasound reception.
  • Designed an electronic interface centered around a second-generation voltage conveyor (VCII).
  • Implemented the VCII using a commercially available AD844 integrated circuit with a ±15 V supply.

Main Results:

  • Achieved a high sensitivity level of approximately -100 dB for ultrasound reception.
  • Demonstrated successful reception without the need for any filtration stages.
  • The interface performance is comparable to existing commercial references.

Conclusions:

  • The proposed piezopolymer sensor and VCII-based interface offer a highly sensitive and simple solution for low-frequency ultrasound reception in air.
  • This approach eliminates the need for complex filtration, reducing system complexity and cost.
  • The findings pave the way for improved electronic systems in applications requiring environmental sensing via ultrasound.