PROBLEM TO BE SOLVED: To accurately diagnose the physical and mental state of a user.SOLUTION: The stress evaluation device (U) comprises: a pulse wave measuring means (C3) for measuring pulse waves (W0) an attractor constituting means (C5) for constituting an attractor (A) a data vector selecting means (C6A) for selecting a selection vector (Xi) a near vector detecting means (C6B) for detecting near vectors (Xj, Xk) a tangential vector computing means (C6C) for computing tangential vectors (Ti, Tj, Tk) a parallelism computing means (C6D) for computing parallelism (tpmi) a distance computing means (C6F1) for computing a distance (di) a stress evaluated value computing means (C6) for computing a stress evaluated value (Ef) on the basis of the plurality of parallelisms (tpmi) and the plurality of distances (di) and a diagnosing means (C8) for diagnosing the physical and mental state of the user by comparing the stress evaluated value (Ef) with a reference stress evaluated value.COPYRIGHT: (C)2009,JPO&INPIT【課題】ユーザの心身の状態を精度良く診断すること。【解決手段】脈波(W0)を測定する脈波測定手段(C3)と、アトラクタ(A)を構成するアトラクタ構成手段(C5)と、選択ベクトル(Xi)を選択するデータベクトル選択手段(C6A)と、近傍ベクトル(Xj,Xk)を検出する近傍ベクトル検出手段(C6B)と、接線のベクトル(Ti,Tj,Tk)を演算する接線ベクトル演算手段(C6C)と、平行度(tpmi)を演算する平行度演算手段(C6D)と、距離(di)を演算する距離演算手段(C6F1)と、複数の平行度(tpmi)と、複数の距離(di)とに基づいてストレス評価値(Ef)を演算するストレス評価値演算手段(C6)と、ストレス評価値(Ef)と基準ストレス評価値とを比較することにより、ユーザの心身の状態を診断する診断手段(C8)とを備えたストレス評価装置(U)。【選択図】図2
