Paramount Bed Company, Limited

Hisao Morimura

Makoto Tanaka

Shinsuke Watanabe

Hiroki Kazuno

A bed apparatus includes: a mattress mounted on a bed body; and, first cells arranged on both left and right sides in a longitudinal direction of the bed body and is configured to change the body position of a patient on the mattress by inflating the first cells alternately. When the first cells on the left and right sides are inflated, and when a difference in pressure between the first cells on the left and right sides has continuously fallen within a decision pressure value range for a decision pressure value continuation time, the body position of the patient is changed, whereas when the difference has not continuously fallen within the pressure value range for the continuation time or when the difference has continuously fallen out of the pressure value range for the continuation time, change of the body position of the patient will not be performed.

Bed apparatus and patient detection method

When pressure detected by a pressure sensor connected to a calibration standard cell has continuously fallen within a regulated pressure range at calibration for a regulated duration at calibration, zero-adjustment is performed based on the pressure value detected by the pressure sensor. Then, communication between the plurality of cells is created to perform internal pressure adjustment of the plurality of cells to a predetermined internal pressure value, based on the pressure value detected by the pressure sensor connected to the calibration standard cell and calibrate each of pressure sensors connecting to the plurality of cells, based on the adjusted internal pressure. With this scheme, it is possible to a mattress and the like that can perform zero-point adjustment efficiently by adjusting the zero point in the same manner even if the mattress is formed of a plurality of branches, without releasing the pressure sensor of each cell to atmospheric pressure.

Mattress, pressure sensor calibration method, and bed device

A load measuring unit detects the load of a bed section and generates a load signal. A body weight computing unit computes the body weight of a user positioned on the bed section on the basis of the load signal. A first determination unit determines whether the body weight is equal to or less than a prescribed threshold. A center-of-gravity position computing unit computes a center-of-gravity position of the user on the basis of the load signal. A second determination unit determines whether the center-of-gravity position is in a monitored area of the bed section. The state of the user is detected to away from the bed when the first determination unit has determined that the body weight is equal to or less than a prescribed threshold, and the second determination unit has determined that the center-of-gravity position is within the monitored area.

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Tokyo, Japan

Hisao Morimura