PROBLEM TO BE SOLVED: To provide a technology to accurately estimate a pulse rate even when an SN ratio is not good or a frequency component according to a period of a pulse rate does not appear as a conspicuous peak.SOLUTION: There is provided a pulse rate estimation device including a signal acquisition part and a pulse rate estimation part. The signal acquisition part acquires an observation signal indicating vibration generated in a body due to a heartbeat. The pulse rate estimation part analyzes the observation signal acquired by the signal acquisition part, specifies a harmonic component corresponding to a pulse cycle and a plurality of estimated frequency components, and estimates a pulse rate from a frequency difference between at least two frequency components with frequencies adjacent to each other.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】SN比が悪い場合や脈拍の周期に応じた周波数成分が顕著なピークとして現れない場合であっても、脈拍数を精度良く推定することを可能にする技術を提供する。【解決手段】以下の信号取得部、および脈拍数推定部を有する脈拍数推定装置を提供する。信号取得部は、心臓の拍動に応じて身体に生じる振動を表す観測信号を取得する。脈拍数推定部は、信号取得部により取得された観測信号を解析して脈拍周期に対応する高調波成分と推定される複数の周波数成分を特定し、周波数が互いに隣り合う少なくとも2つの周波数成分の周波数差から脈拍数を推定する。【選択図】図1
