Estimation of Human state using HRV analysis


  • The 2-dimensional map presumes the state of Human, it show the degree of awakening, and the degree of fatigue by two indices, the largest Lyapunov exponent and a correlation dimension.
  • Sleep state presumption and the hypnagogic timing judging system using chaos analysis of HRV
  • The invigorating alarm clock system by the state estimated, of REM sleep and NON-REM sleepThe invigorating alarm clock system by the state estimated, of REM sleep and NON-REM sleep


Fig.1: The map of Human state estimated by chaos indices





Fig.2: The application of Viewing the Human state



Fukuda Lab.
Reserch Activity 2003