MENTAL STRESS EVALUATION, DEVICE USING THE SAME, MENTAL STRESS EVALUATION METHOD, AND PROGRAM FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To develop a device for accurately measuring the stress situation of a subject in a short time by analyzing a combination of cardiac fluctuation and respiratory information.

SOLUTION: The device includes a biological information measuring part 5 measuring the cardiac cycle and respiratory cycle of the subject; an average cycle analysis part 9 obtaining an average cardiac cycle and an average respiratory cycle from the cardiac cycle and respiratory cycle measured in the biological information measuring part 5; a cardiac fluctuation analysis part 10 computing cardiac cycle intervals RR(n) and RR(n+k) at the n-th beat and (n+k)th beat to an optional variable n (n is an integer) and an optional constant k (k≥1) of the cardiac cycle, and inputting them as coordinate points to two-dimensional coordinate axes; and a mental stress evaluation part 11 having a respiratory cycle fluctuation correcting part 12 computing a ratio r of the average respiratory cycle to the average cardiac cycle to make a correction of k=r, and applying quantitative processing to a set of coordinate points after making a correction to acquire a quantitative value on the biological information of the subject and to evaluate it as a stress.

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