An Analysis on the Particular Pulse Related to the Human Bio-signal by Using Photoplethysmography(PPG)

摘要

The 'Sajin,' four diagnostics have been used in Oriental traditional medicine to diagnose a range of diseases. One of the diagnostics, 'Jinmeak,' is an analysis of the cardiovascular activity and that is also used an oriental doctor to diagnoses a disease. PPG sensors, a non-invasive method, can make an easy diagnosis by measuring and analyzing the cardiovascular activity. The sensor is composed of a LED and photodiode for monitoring the waveform of pulsation. The human pulse is normally 60 to 150 beat a minute and is approximately 1 to 2.5Hz. The signals have a very low voltage (20mV) and also contain complex information about the patient. The original signals need to be changed to new signals though particle filters and amplifiers in to analyze the signals easily. After conducting an analysis of the signals, as follows, some facts are known. First, people have different voltage levels between 15mV and 20mV. In addition, a particular signal shape can be observed under human conditions. Briefly, if the data of particular signals is collected and generalized, a diagnosis instrument can be developed for making an easy diagnosis of a disease.