PROBLEM TO BE SOLVED: To provide an eating and drinking behavior detection device capable of discriminating between mastication and deglutition by a subject based on a vibration signal corresponding to vibration generated from the subject.SOLUTION: An eating and drinking behavior detection device includes a vibration acquisition unit for acquiring vibration generated from the body of a subject, and generating a vibration signal according to the vibration, a power calculation unit 11 for dividing the vibration signal into frames of a predetermined length, and calculating the power of the vibration signal for each frame, a stationarity determination unit 12 for determining whether the frame is a stationary signal with periodicity or a non-stationary signal with no periodicity for each frame of the vibration signal, a duration time measurement unit 13 for detecting a period when the power of the vibration signal is equal to a power threshold or higher and the non-stationary signal continues based on the power for each frame of the vibration signal and the result of the determination by the stationarity determination unit 12, and acquiring the duration time of the period, and a determination unit 14 for determining whether the subject has performed deglutition or mastication in the period when the non-stationary signal continues according to the duration time.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】被検者から発せられる振動に応じた振動信号に基づいて被検者の咀嚼と嚥下とを識別可能な飲食行動検出装置を提供する。【解決手段】飲食行動検出装置は、被検者の体内から発せられる振動を取得し、その振動に応じた振動信号を生成する振動取得部と、振動信号を、所定時間長のフレームに分割し、フレームごとに振動信号のパワーを算出するパワー算出部11と、振動信号のフレームごとに、そのフレームが周期性を持つ定常信号か周期性を持たない非定常信号かを判定する定常性判定部12と、振動信号のフレームごとのパワー及び定常性判定部12の判定結果に基づいて、振動信号のパワーがパワー閾値以上で非定常信号が継続する期間を検出し、その期間の継続時間を取得する継続時間計測部13と、継続時間に応じて、非定常信号が継続する期間において被検者が嚥下したか咀嚼したかを判定する判定部14とを有する。【選択図】図3
