Patent ID: 7834770
Filing Date: 2010-11-16
Classification: A61B,G08B

Abstract:
1. A bed apparatus having a movable bedboard, comprising: load measuring unit for detecting the load of a bed section and generating a load signal; body weight computing unit for computing the weight of a user positioned on the bed section on the basis of said load signal; body weight threshold determination unit for determining whether said body weight is equal to or greater than a prescribed threshold; center-of-gravity position computing unit for computing a center-of-gravity position of said user on the basis of said load signal; center-of-gravity position area determination unit for determining whether said center-of-gravity position is in a monitored area of the bed section; body weight center-of-gravity position monitoring unit for monitoring the time in which said body weight is equal to or greater than a prescribed threshold and said center-of-gravity position is in said monitored area, on the basis of the determination result of said body weight threshold determination unit and center-of-gravity position area determination unit; movable bedboard information recognition unit for inputting a state of a movable bedboard of the bed; and monitored area adjustment unit for adjusting said monitored area on the basis of the movable bedboard information of said movable bedboard information recognition unit, wherein the state of said user is detected when said monitored area adjustment unit adjusts the monitored area and sets the adjusted monitored area in said center-of-gravity position area determination unit, and said center-of-gravity position monitoring unit detects the state of said user when the monitored time is continuous and has exceeded a prescribed time, in the case that the movable bedboard information that has been inputted to said movable bedboard information recognition unit has been adjusted.