Pulse wave contains human physiological and pathological information. Different\npeople will exhibit different characteristics, and hence determining the characteristic\npoints of the pulse wave of human physiological health makes sense. It is common\nthat we extract the characteristic value of pulse wave signal with the method based on\nwavelet transform on a small scale, and then determine the locations of the characteristic\npoints by modulus maxima and modulus minima. Before determining characteristic\nvalue by detecting modulus maxima and modulus minima, we need to determine\nevery period of the pulse wave. This paper presents a new kind of adaptive\nthreshold determination method which is more effective. It can accurately determine\nevery period of the pulse wave, and then extract characteristic values by modulus\nmaxima and modulus minima in every period of the pulse wave. The method presented\nin this paper promotes the research utilizing pulse wave on health life.
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