| Summary: | 碩士 === 國立屏東科技大學 === 生物機電工程系 === 94 === A complete study of the optical analysis system via detecting the correlation for the variation of the photoplethysmography signal and the heartbeat signal between motionless and motion is presented in this dissertation. By designing an optical analysis system circuit, the photoplethysmography signal can be sensed. Next, the signal sensed can first be analyzed by Independent Component Analysis method for separating the biosignals and noises, then, making use of Wavelet transform analysis method deals with the biosignals in time domain and frequency domain, respectively. Finally, comparing Wavelet transform analysis method with traditional Fourier transform method expects that the variation behavior of heart rate variance can attain to measurement more accurately than the traditional measurement method in the literature.
By aforementioned results, the Independent Component Analysis method is very easy to separate the low frequency noise from signal sensed and make the signal processing more accurate. The Wavelet transform analysis method can replace Fourier transform method to approach the analysis of heart rate variance, observe the variation of mini frequency more perfectly and find out the related of time domain and frequency domain at the same time. Finally, using the analysis of summing up to the phenomena observed hopes to reach clinic application in the future and offer to doctor as the auxiliary tool for diagnosis.
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