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A two-dimensional hydrophone array using piezoelectric PVDF.

A Hurrell1, F Duck

  • 1Precision Acoustics Ltd, UK.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|February 2, 2008
PubMed
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A novel two-dimensional hydrophone array using polyvinylidene fluoride (PVDF) ultrasound sensors was developed. This advanced ultrasound measurement technology offers a flat frequency response and minimal frequency dependency for effective field mapping and diagnostic assessments.

Area of Science:

  • Ultrasound Technology
  • Sensor Development
  • Acoustical Measurement

Background:

  • Established polyvinylidene fluoride (PVDF) ultrasound sensor technology.
  • Need for advanced hydrophone arrays for precise ultrasound field characterization.

Purpose of the Study:

  • To present a novel two-dimensional hydrophone array for ultrasound measurement.
  • To characterize the performance of this new hydrophone array.

Main Methods:

  • Construction of an 8x8 hydrophone array with 64 circular PVDF elements (0.2 mm diameter, 1 mm spacing).
  • Performance characterization through frequency response, effective radius, dynamic range, interelement variation, and acquisition time measurements.

Main Results:

Related Experiment Videos

  • Hydrophone elements demonstrate a flat frequency response (+/-0.8 dB from 1-25 MHz).
  • Effective radius shows minimal frequency dependency (+/-8%) and is close to the nominal sensor radius (+/-8%).

    • Conclusions:

    • The developed two-dimensional hydrophone array is a significant advancement in ultrasound measurement technology.
    • Potential applications include transducer field mapping, diagnostic ultrasound assessment, and nondestructive testing.