Mental state assessment apparatus and mentel state assessment method
First Claim
Patent Images
1. A mental state assessment apparatus which assesses mental state of a subject, comprising:
- a sensor which detects from the subject a signal given off by an action current generated by excitation of cardiac muscles of the subject;
a heart rate measuring device for measuring heart rate based on the signal given off by the action current; and
a determination device for determining the mental state of the subject based on a variation trend of the heart rate and generating a signal which represents a result of the determination.
2 Assignments
0 Petitions
Accused Products
Abstract
A mental state assessment method assesses the mental state of the subject based on variation of the subject'"'"'s heart rate. Thus, it correctly assesses mental state of a subject irrespective of external environment or time of day.
-
Citations
21 Claims
-
1. A mental state assessment apparatus which assesses mental state of a subject, comprising:
-
a sensor which detects from the subject a signal given off by an action current generated by excitation of cardiac muscles of the subject;
a heart rate measuring device for measuring heart rate based on the signal given off by the action current; and
a determination device for determining the mental state of the subject based on a variation trend of the heart rate and generating a signal which represents a result of the determination. - View Dependent Claims (2, 3, 4)
-
-
5. A mental state assessment method for assessing mental state of a subject, comprising:
-
a heart rate measuring process of measuring heart rate based on a signal given off by an action current generated by excitation of cardiac muscles of the subject; and
a determination process of determining the mental state of the subject based on a variation trend of the heart rate and generating a signal which represents a result of the determination.
-
-
6. A mental state assessment apparatus which assesses mental state of a subject, comprising:
-
a sensor which detects from the subject a signal given off by an action current generated by excitation of cardiac muscles of the subject;
a heart rate measuring device for measuring heart rate based on the signal given off by the action current; and
a sleepiness assessment device which assesses that the subject is in a sleepy state if the heart rate continues to be lower than a predetermined value for a predetermined period and is on a downward trend. - View Dependent Claims (7, 8, 9, 10, 11)
-
-
12. A mental state assessment method for assessing mental state of a subject, comprising:
-
a heart rate measuring process of measuring heart rate of the subject; and
sleepiness assessment process of assessing that the subject is in a sleepy state if the heart rate continues to be lower than a predetermined value for a predetermined period and is on a downward trend. - View Dependent Claims (13, 14, 15, 16, 17)
-
-
18. A mental state assessment apparatus which assesses mental state of a subject, comprising:
-
a sensor which detects from the subject a signal given off by an action current generated by excitation of cardiac muscles of the subject;
a heart rate measuring device for measuring heart rate based on the signal given off by the action current;
a heartbeat fluctuation measuring device for measuring fluctuations in heartbeat intervals corresponding to respiratory variations based on the signal given off by an action current and generating a heartbeat fluctuation signal;
a sleepiness assessment device which assesses that the subject is in a sleepy state if the heart rate continues to be lower than a predetermined value and a component value in a predetermined band of the heartbeat fluctuation signal is on an upward trend for a predetermined period. - View Dependent Claims (19)
-
-
20. A mental state assessment method for assessing mental state of a subject, comprising:
-
a heart rate measuring process of measuring heart rate of the subject;
heartbeat fluctuation measuring process of measuring fluctuations in heartbeat intervals corresponding to respiratory variations from the subject and generating a heartbeat fluctuation signal;
sleepiness assessment process of assessing that the subject is in a sleepy state if the heart rate continues to be lower than a predetermined value and a component value in a predetermined band of the heartbeat fluctuation signal is on an upward trend for a predetermined period. - View Dependent Claims (21)
-
Specification