Patent ID: 8801621

Claim:
A pulse wave data analyzing method for extracting biometric information from pulse wave data taken from a living body, said pulse wave data analyzing method conducted by using a processor, the method comprising the steps of: successively detecting bottom peak values and top peak values of the pulse wave data obtained by continuously measuring a pulse wave for a specific period of time along a time axis; pairing a detected bottom peak value with a corresponding detected adjacent top peak value, respectively, in a successive manner along the time axis to generate a plurality of successive pairs; calculating bottom-to-top amplitude difference values representing a difference between the bottom and top peak values of each successive pair along the time axis to define a first maximum difference value, a second maximum difference value, and a third maximum difference value, wherein the first, second, and third maximum differences values obtained from the corresponding successive pairs occur in succession along the time axis; comparing the first maximum difference value and the second maximum difference value; classifying the bottom and top peak values corresponding to the second maximum difference value as temporarily erasable data if a ratio of the first maximum difference value to the second maximum difference value is greater than a predetermined threshold; comparing the second maximum difference value with the third maximum difference value; restoring the temporarily erasable data as data to be used for pulse wave data analysis if a ratio between the second maximum difference value and the third maximum difference value is larger than the predetermined threshold; and completely erasing the temporarily erasable data as corresponding to noise if the ratio between the second maximum difference value and the third maximum difference value is not larger than the predetermined threshold.