To improve determination accuracy for a stress state of a subject.SOLUTION: A stress determination ECU 26 acquires a base heart rate HR0 of a subject measured by a base heart rate acquisition device 46, and calculates a heart rate HR of a driver 20 on the basis of a heartbeat signal input from a heartbeat measuring device 24. The stress determination ECU determines a stress state of the subject on the basis of the time that the heart rate HR of the subject satisfies the formula (1) HR≥ch×HR0 (ch being a coefficient) and the time that the heart rate index (e.g., the ratio LF/HF of frequency components of a heartbeat interval of the subject and variations RMSSD of the heartbeat interval of the subject) other than the base heart rate HR0 of the subject satisfies a predetermined stress determination condition using the heart rate index.SELECTED DRAWING: Figure 2
【課題】被験者のストレス状態の判定精度を向上させる。【解決手段】ストレス判定ECU26は、基底心拍数取得装置46によって測定された被験者の基底心拍数HR0を取得すると共に、心拍計測装置24から入力された心拍信号に基づいて、運転者20の心拍数HRを算出する。そして、HR≧ch×HR0…(1)前記被験者の心拍数HRが上記(1)式(chは係数)を満たす時間と、被験者の基底心拍数HR0以外の心拍指標(例えば、被験者の心拍間隔の周波数成分の比率LF/HF、被験者の心拍間隔のばらつきRMSSD)が当該心拍指標を用いた所定のストレス判定条件を満たす時間と、に基づいて前記被験者のストレス状態を判定する。【選択図】図2
STRESS DETERMINATION DEVICE, SHEET FOR MOVABLE BODY, STRESS DETERMINATION METHOD, AND PROGRAM
ストレス判定装置、移動体用シート、ストレス判定方法およびプログラム
2023-08-24
Patent
Elektronische Ressource
Japanisch
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