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Wideband Optical Detector of Ultrasound for Medical Imaging Applications
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Ultrasonic Sensor Fusion Inverse Algorithm for Visually Impaired Aiding Applications.

György Kovács1, Szilvia Nagy1

  • 1Széchenyi István University, Department of Telecommunications, Egyetem tér 1 Hungary, H9026 Gyor, Hungary.

Sensors (Basel, Switzerland)
|July 8, 2020
PubMed
Summary

This study presents an ultrasound echolocation system for obstacle detection. The model uses a time-of-flight method with sensor fusion to provide reliable distance and position information, enhancing navigation for visually impaired individuals.

Keywords:
depth mappingsensor fusiontime of flightultrasound echolocationvisually impaired

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Area of Science:

  • Robotics and Sensor Technology
  • Assistive Technology
  • Acoustic Sensing

Background:

  • Ultrasound measurements offer advantages over light or radio frequency methods in noisy or complex environments.
  • Sensor fusion enhances precision and reliability in distance measurement systems.
  • Echolocation aids can significantly improve mobility and quality of life for visually impaired individuals.

Purpose of the Study:

  • To present a model system for reliable position and distance determination to multiple objects using ultrasound.
  • To develop a sensor fusion algorithm for an ultrasound-based echolocation system.
  • To evaluate the system's performance in indoor environments.

Main Methods:

  • Utilizing the time-of-flight method with a mathematical model incorporating signal probability.
  • Employing a system with multiple receivers and a single ultrasound source.
  • Implementing a sensor fusion algorithm designed for arbitrary sensor placement.

Main Results:

  • The developed mathematical model accurately processes and fuses signals from multiple ultrasound sensors.
  • The system demonstrated reliable position and distance measurements to multiple objects.
  • Indoor experiments validated the effectiveness of the proposed echolocation system.

Conclusions:

  • The presented ultrasound echolocation system provides a robust solution for obstacle detection.
  • The mathematical model supports flexible sensor configurations and signal fusion.
  • This technology has the potential to significantly aid visually impaired individuals in independent navigation.