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Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
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Occluded Grape Cluster Detection and Vine Canopy Visualisation Using an Ultrasonic Phased Array.

Baden Parr1, Mathew Legg1, Stuart Bradley2

  • 1Department of Mechanical and Electrical Engineering, Massey University, 229 Dairy Flat Highway, Auckland 0632, New Zealand.

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Summary
This summary is machine-generated.

This study explores using ultrasound for automated grape yield estimation, overcoming leaf occlusion issues common in other methods. Ultrasound significantly improved grape volume accuracy, aiding precision viticulture.

Keywords:
arraycanopy estimationnondestructiveremote sensingsmart agricultureultrasoundvine yield

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Area of Science:

  • Agricultural Engineering
  • Sensor Technology
  • Precision Viticulture

Background:

  • Traditional grape yield estimation is labor-intensive and inaccurate.
  • Automated methods like computer vision struggle with occluded grapes.
  • Existing technologies like synthetic aperture radar are costly.

Purpose of the Study:

  • To investigate the potential of ultrasound for imaging occluded grapes through leaves.
  • To develop an accurate and cost-effective automated grape yield estimation method.

Main Methods:

  • Utilized a directional, low-frequency ultrasonic array with air-coupled transducers and microphones.
  • Employed a fan to distinguish grape and leaf ultrasonic reflections.
  • Applied chirp excitation waveforms and near-field focusing for enhanced resolution.

Main Results:

  • Ultrasound reduced grape volume overestimation from 222% to 112% (vs. photogrammetry).
  • Further reduced overestimation to 2.5% (vs. 3D scan convex hull).
  • Achieved more accurate canopy volume estimations.

Conclusions:

  • Ultrasound technology offers a promising solution for accurate, non-invasive grape yield estimation.
  • This method effectively addresses leaf occlusion challenges in viticulture.
  • Improved canopy volume data supports precision agriculture practices like variable rate applications.