| 摘要 |
<p>PROBLEM TO BE SOLVED: To simply judge whether a human is in a stressed, tired or awaken state. SOLUTION: Whether one is in a stressed, tired or awaken state is judged by measuring pulse waves of hemoglobin carrying oxygen in a bloodstream and hemoglobin not carrying oxygen by infrared rays of short and long wave length, and from peak values (Vp) of infrared rays of short and long wave length, differences between high and low peak values (Vp-Vb) and the tendency of a heart rate to decrease and increase from the measured data.</p> |
