Patent ID: 9693738
Date: 2017-07-04
CPC Classifications: A61B

Claim:
1. A heartbeat measuring apparatus comprising: a receiver that receives a millimeter wave signal reflected by a user; an identifier that identifies a plurality of characteristic points of the received millimeter wave signal in time series, the plurality of characteristic points including a local maximum point, a local minimum point, and an inflection point defined by information representing a positive or negative sign of a slope of the millimeter wave signal and information representing a positive or negative sign of a third-order derivative of the millimeter wave signal; a memory that stores a heartbeat characteristic point pattern indicating a first arrangement order of a first inflection point following a first local maximum point and having a negative slope and a positive third-order derivative, a first local minimum point following the first inflection point, a second inflection point following the first local minimum point and having a positive slope and a negative third-order derivative, and a second local maximum point following the second inflection point; an acquirer that acquires, from among the plurality of characteristic points that have been identified, a first characteristic point set including first characteristic points that are arranged in an order identical to the first arrangement order; and an outputter that outputs heartbeat information on the user including a time based on the first characteristic points included in the first characteristic point set that has been acquired.