Patent ID: 8838411
Filing Date: 2014-09-16
Classification: A61B,A61G,G01G

Abstract:
1. A bed device comprising: load measurement means for detecting a load of a bed unit and generating a load signal; first computation means for computing a center-of-gravity variation of said bed unit on the basis of said load signal; first determination means for determining whether the center-of-gravity variation computed by the first computation means is equal to or greater than a first threshold value; totaling means for totaling, over the course of a plurality of time periods backward from a specific time, the number of times that the center-of-gravity variation computed by said first computation means is determined to be equal to or greater than said first threshold value in each of fixed time periods; second computation means for multiplying the totaling results of said totaling means by coefficients established for each of said time periods and adding the results; and second determination means for determining a waking or sleeping state or determining a body movement or rest state of a user on said bed unit, on the basis of whether a computation result of the second computation means is equal to or greater than a second threshold value.