LIVING BODY DETECTION DEVICE, LIVING BODY DETECTION METHOD, AND PROGRAM

• Main Authors: OTSUKI TOMOAKI, YE CHEN
• Format: Patent
• Language: English; Japanese
• Published: 06.07.2023
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

To accurately determine the presence or absence of a living body.SOLUTION: A living body detection device comprises: a signal acquirer that acquires a first signal including a first frequency component that is a frequency component of heartbeat and a second frequency component that is a frequency component of breathing; a filter that attenuates a frequency component higher than the first frequency component based on the first signal to generate a second signal; a frequency analyzer that analyzes a frequency component of the second signal; a variance value calculator that calculates a first variance value of energy of at least one of the first frequency component and the second frequency component based on a result of analysis by the frequency analyzer; a first statistical quantity calculator that calculates a first statistical quantity of the first variance value for a predetermined period; and a determiner that determines presence or absence of a living body based on the first statistical quantity.SELECTED DRAWING: Figure 1 【課題】生体の有無を精度良く判断することを課題とする。【解決手段】本生体検出装置は、心拍の周波数成分である第１周波数成分及び呼吸の周波数成分である第２周波数成分を含む第１信号を取得する信号取得部と、前記第１信号に基づいて、前記第１周波数成分より高い周波数成分を減衰させて第２信号を生成するフィルタ部と、前記第２信号の周波数成分を分析する周波数分析部と、前記周波数分析部による分析結果に基づいて、前記第１周波数成分、及び、前記第２周波数成分のうち、少なくともいずれか一方の周波数成分のエネルギーの第１分散値を計算する分散値計算部と、所定期間における前記第１分散値の第１統計量を計算する第１統計量計算部と、前記第１統計量に基づいて、生体の有無を判断する判断部とを含む。【選択図】図１