Human fatigue assessment device and human fatigue assessment method

A human fatigue assessment device comprising:

• a physiological signal measuring unit configured to measure a heartbeat or pulse wave of a user as a physiological signal;
• a feature value extracting unit configured to extract feature values each indicating amount of parasympathetic nerve activity and each obtained from the physiological signal measured by said physiological signal measuring unit;
• a storage unit in which the feature values extracted by said feature value extracting unit;
• and
• a fatigue type determining unit configured to determine a type of fatigue of the user as to whether the fatigue of the user is due to a first work or due to a second work more monotonous than the first work, using the feature values extracted by said feature value extracting unit,
• wherein said fatigue type determining unit is configured to determine the type of the fatigue of the user by comparing a feature value among the feature values extracted by said feature value extracting unit and at least one of the feature values stored in said storage unit.

A human fatigue assessment device comprising:

• a physiological signal measuring unit configured to measure a brain signal of a user as a physiological signal;
• a feature value extracting unit configured to extract feature values each of which is obtained from the physiological signal measured by said physiological signal measuring unit and related to at least one of a β wave and an α wave;
• a storage unit in which the feature values extracted by said feature value extracting unit is stored;
• and
• a fatigue type determining unit configured to determine a type of fatigue of the user as to whether the fatigue is due to a first work or due to a second work that is more monotonous than the first work, using the feature values extracted by said feature value extracting unit,
• wherein said fatigue type determining unit is configured to determine the type of the fatigue of the user by comparing a feature value among the feature values extracted by said feature value extracting unit and at least one of the feature values stored in said storage unit.

A human fatigue assessment device comprising:

• a stimulation output unit configured to output audio stimulation for stimulating an auditory sense of a user;
• a physiological signal measuring unit configured to measure a pulse wave signal of the user;
• a feature value extracting unit configured to extract feature values each of which is obtained from a systolic posterior component of the pulse wave signal measured by said physiological signal measuring unit;
• a storage unit in which the feature values extracted by said feature value extracting unit is stored;
• and
• a fatigue type determining unit configured to determine a type of a fatigue of the user whether it is fatigue due to a first work or due to a second work that is more monotonous than the first work, using the feature values extracted by said feature value extracting unit,
• wherein said fatigue type determining unit is configured to determine the type of the fatigue of the user by comparing (i) feature values stored in said storage unit in a time period before an output of audio stimulation by said stimulation output unit and (ii) feature values in a time period when said stimulation output unit outputs the audio stimulation.