Patent ID: 8755878
Filing Date: 2014-06-17
Classification: A61B,B60K

Abstract:
1. A heartbeat signal processor comprising: a first electrode configured to be gripped with one hand to detect a first heartbeat signal, the first heartbeat signal being a potential difference signal with respect to a ground; a second electrode configured to be gripped with another hand to detect a second heartbeat signal, the second heartbeat signal being another potential difference signal with respect to the ground; a DC voltage calculating unit configured to calculate first and second average DC voltage values as voltage values of direct-current components in the first and second heartbeat signals; an AC amplitude calculating unit configured to calculate first and second average AC amplitude values as amplitude values of alternate-current components in the first and second heartbeat signals; a correlation coefficient calculating unit configured to calculate a correlation coefficient between the alternate-current component in the first heartbeat signal and the alternate-current component in the second heartbeat signal; an amplification factor setting unit configured to set an amplification factor for amplifying the first or second heartbeat signal on the basis of the first and second average DC voltage values, the first and second average AC amplitude values, and the correlation coefficient; and a signal generating unit configured to generate a differential heartbeat signal by amplifying the first or second heartbeat signal on the basis of the amplification factor set by the amplification factor setting unit and calculating a difference between the first and second heartbeat signals.