Abstract
Based on ARM9, an embedded operating system was developed for pulse wave acquisition and processing in this work, it consists of an integrated pulse sensor, signal modulation circuit, data acquisition unit, USB communication module, data storage display module. Using this system, the changes in of four volunteers (2 women and 2 men) pulse and the difference between them were studied by amplitude and phase index of correlation integral, respectively. The results suggested that the human pulse similarity of phase more stabile than of amplitude, the value index have one parabola-growth process in the afternoon and this analysis can reflect the underlying crisis.