Patent ID: 6620104
Filing Date: 2003-09-16
Classification: A61B

Abstract:
A vital signal detecting apparatus comprising:at least two sensors for detecting first pulse waves and outputting analog signals corresponding to the first pulse waves; an A/D converter for converting the analog signals derived from the sensors into digital signals; a separation matrix calculation means for calculating a separation matrix in a case where it is considered that each of the first pulse waves detected by the sensors contains an outer disturbance caused by body movement and a second pulse wave containing no outer disturbance, and only amplitude is changed until the sensors detect the first pulse waves, the separation matrix being for separating the outer disturbance from the first pulse waves by utilizing statistic independency of the second pulse wave and the outer disturbance; and a signal separation calculation means for separately deriving a vital signal corresponding to the second pulse wave and a body movement signal indicating the outer disturbance by operating the separation matrix with respect to the digital signals.