JP2009118980A5 - - Google Patents

Claims (10)

Load detection means that detects the load by inputting the signal of the load sensor that can detect the load on the bed floor, the set average value for a short time from the load value that is detected from moment to moment, and the set value Average value calculating means for obtaining an average value over a long period of time, difference calculating means for calculating a difference between the short-term average value and the average value over a long period of time, and determining the state on the bed from the obtained difference value A state detection system for a user in a bed, characterized by comprising a state determination means. Load detection means for detecting a load by inputting a signal of a load sensor capable of detecting a load on the floor of the bed, storage means for storing a load value detected every moment, and load value stored in the storage means Average value calculating means for obtaining a set average value for a short time, an average value for a set long time, and a difference calculating means for calculating a difference between the short time average value and the average value for a long time And a state determination unit for determining a state on the bed from the obtained difference value. The storage means includes a short-time storage means for storing a set number of load values for a short time and a long-time storage means for storing a set number of load values for a long time. The state detection system for a user in a bed according to claim 2 . 3. The user state detection system for a bed according to claim 1, wherein the average value is calculated by a simple moving average. The short-term average value is smaller than the long-term average value, and when the difference value is larger than a set threshold value, it is characterized in that it is determined that a transition is made from the floor to the bed leaving state. The state detection system of the user in the bed according to claim 1 or 2. It is characterized in that when the average value for a short time is larger than the average value for a long time and the difference value thereof is larger than a set threshold value, it is determined that the transition from the bed leaving state to the bed standing state is made. The state detection system of the user in the bed according to claim 1 or 2. The state determination means is provided with a time measurement means for starting time measurement and measuring the duration when it is determined that the state transition is determined, and determining the state based on the duration time. User status detection system in the described bed. The judgment state is selected from the sleeping state, the rising state, the end sitting state, the forward tilting end sitting state, and the bed leaving state of the user on the bed, and a threshold value between the load values in each of the selected states. The state detection system for the user in the bed according to claim 1 or 2, wherein The determination of the state from the difference value is performed by setting the short-time average value and the long-time value for each loading of the set number of load values at the set time interval to obtain the short-time average value. Calculate the difference between the average values, determine whether the difference value exceeds the threshold value, add the number of times the threshold value is exceeded, and perform from the ratio of the number of times the threshold value is exceeded to the set number of times. The user's state detection apparatus in the bed of Claim 1 or 2 characterized by the above-mentioned. The bed state user detection system according to claim 1 or 2, wherein the vibration of the floor is detected by a change in load value for a short time.