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Healthc Inform Res > Volume 4(1); 1998 > Article
Journal of Korean Society of Medical Informatics 1998;4(1):123-127.
DOI: https://doi.org/10.4258/jksmi.1998.4.1.123    Published online June 30, 1998.
Training Simulator Using Virtual Reality For Postural Balance Rehabilitation
Jong Min Lee, Kwang Suk Park, Nam Kyun Kim
1Interdisciplinary Program in Medical and Biological Engineering Major, Seoul National University, Korea.
2Department of Biomedical Engineering, Seoul National University, Korea.
3Department of Biomedical Engineering, Chonbuk University, Korea.

There is a need of training and rehabilitation system for the patients who have problems in postural balance control due to diseases, accidents or age. We have implemented the training simulator which can apply virtual exercise for the training of patients. The system is composed of exercise recording, graphic simulator and training unit. We loaded two CCD cameras and three gyro-sensors on the exercise recording platform. Two CCD cameras are separated by 6.5cm to simulate human eyes and record slightly different images for each eye. Three gyro-sensors record acceleration in X, Y, Z axes respectively. These signals are sampled with 0.1 sec time intervals(10Hz) and converted to digital format. To integrate two video signals into one, only odd fields from left camera and even fields from right camera are multiplexed to compose a recording video signal. Digitized acceleration signals are recorded in blanking timing interval of NTSC signal format. Simulated bed positions are displayed on the monitor in graphic format. Training unit consisted of HMD and titling bed. Each recorded image is displayed on HMD while the tilting bed is controlled by the recovered accelerated signals. We have recorded the exercises while walking and driving. These recorded exercises are simulated with HMD and graphic display of position.

Key Words: Postural Balance Rehabilitation, Virtual Reality, Training Simulator, HMD
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