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Optical and Acoustic Sensor-Based 3D Ball Motion Estimation for Ball Sport Simulators †.

Sang-Woo Seo1, Myunggyu Kim2, Yejin Kim3

  • 1Creative Content Research Division, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea. swseo@etri.re.kr.

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Summary
This summary is machine-generated.

This study introduces a novel system for estimating 3D ball motion using acoustic and infrared sensors. The sound-based approach enables a wider activity area for sports simulations like baseball and soccer.

Keywords:
3D ball motionacoustic sensorbeamforminginfrared scanningsound source localizationsports simulator

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Area of Science:

  • Robotics and Automation
  • Sensor Technology
  • Sports Science

Background:

  • Accurate estimation of 3D ball motion is crucial for realistic ball sport simulators.
  • Existing camera-based methods have limitations in terms of activity area.

Purpose of the Study:

  • To develop and evaluate a novel system for estimating 3D ball motion, including speed and projection angle.
  • To overcome the limitations of camera-based systems by utilizing acoustic and infrared sensors.

Main Methods:

  • A three-step system: sound-based ball firing detection, sound source localization, and infrared (IR) scanning for motion analysis.
  • Impulsive sound classification using mel-frequency cepstrum and feed-forward neural networks for launch detection.
  • 2D microelectromechanical system (MEMS) microphones and delay-and-sum beamforming for sound source localization.
  • High-speed infrared scanning for determining the ball's 3D position and trajectory.

Main Results:

  • The proposed system successfully detects ball launch sounds and localizes the firing position.
  • The system accurately determines the time and 3D position of the ball.
  • Experimental results show a wider activity area compared to camera-based estimation methods.

Conclusions:

  • The developed acoustic and IR sensor-based system provides effective 3D ball motion estimation.
  • This technology offers practical applications for various sports simulations, including soccer and baseball.
  • The system's expanded activity area enhances the realism and usability of sports simulators.