A Variable Frequency Modulation Electrical Stimulation System and the Evaluation for Physiological Adaptation Application

• Main Authors: Yi Zhang, 張毅
• Other Authors: Cheng-Chi Tai
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/81837248550342830858

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 96 === In this thesis, we have developed a variable frequency modulation (FM) electrical stimulation system. It generates stimulated signals to modulate the middle-frequency carrier with low-frequency sine wave. The output waves are produced by two sine wave functions and synthesized by a four-quadrant multiplier with balance. The frequency of the stimulation waveform can be controlled from a digital unit. In order to have more effective stimulation, this study adopted a variable FM method in the system. We tested the curative effect of the electrical stimulation based on the feeling and the tolerance of human body. Our experimental results showed that the muscle is very sensitive to ramped low-frequency waveforms for three different positions. When compared with fixed FM stimulation, the variable FM stimulation has longer and better curative effect.