Patent ID: 9049997
Filing Date: 2015-06-09
Classification: A61B

Abstract:
1. A pulse detector that detects a pulse signal originating from the pulse of a human body, comprising: a pulse wave sensor that outputs a first pulse wave signal in which the pulse signal and a noise signal are mixed, wherein the noise signal includes a normal signal having a high autocorrelation and an abnormal noise signal having a low autocorrelation; a motion sensor that outputs a motion signal in response to a motion of the human body; a first filtering unit that outputs a second pulse wave signal including the pulse signal and the normal noise signal extracted from the first pulse wave signal; a second filtering unit that outputs a third pulse wave signal which the normal noise signal has been suppressed using the second pulse wave signal and the motion signal; and an analyzing unit that analyzes the third pulse wave signal to obtain a frequency information corresponding to the third pulse wave signal; wherein the first filtering unit outputs the second pulse wave signal using the first pulse wave signal and the third pulse wave signal.