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KMID : 1144120120020040233
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Biomedical Engineering Letters
2012 Volume.2 No. 4 p.233 ~ p.239
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Ball tracking system for tongue disorder patient: Signal characteristic of different sized balls
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Woo Sang-Hyo Arman
Yoo Jae-Yeon
Song Byung-Seop
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Abstract
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Purpose: With an increased number of tongue disorder patients, the demand for new devices to treat tongue disorder is rapidly increasing. In this paper, a novel ball type treatment device is proposed: patient places a ball in their mouth to exercise muscles, and the system senses the acceleration of the ball.
Methods: The ball has the ability to measure tri-axial acceleration and is packaged in biocompatible silicone. Performance of the ball was calibrated with a laser vibrometer that works as a vibration and displacement meter. The measured signals were analyzed by time-frequency analysis such as short time fourier transform (STFT), wavelet transform (WT), and multiple signal classification (MUSIC) spectrum, and which were compared with each other.
Results: Based on signal analysis, the signal characteristics of the large and small balls were compared. Simple in vivo experiments were conducted and showed feasibility to measure the acceleration of the ball. From the experiments, peak and valley values of ball diameter 19 mm were showed as (x-axis: 14.13±4.79, y-axis: 6.12±0.96, Z-axis: 13.38±5.65 mm/s2). Conclusions The proposed system showed feasibility to treat tongue disorder. The system can be combined with a game to increase motivation to practice.
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KEYWORD
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Rehabilitation, Acceleration, Signal processing, Biomedical
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