| 摘要 |
An airbed (10) comprises a multi-zone air mattress (20) and a plurality of normally closed valves (35-38) which seal pressures in each of the zones (2528) when power to an air pump is off. When pump power is on, the pressure in the zones is regulated at predetermined pressure settings ideal for the user. Deviations from ideal pressure cause a programmed controller (42) to calculate inflation/deflation times for the respective zones that would be required to inflate/exhaust the zones to the desired pressures. Ideal pressures are automatically calculated by inflating the zones to initial pressures and sealing them. Then, a user reclines on the bed and pressures are measured. From the measured pressures, ideal pressure settings are calculated that will support the user in an ideal manner, such as maintaining the user in an ideal sleeping posture with a minimum amount of pressure in the zones. Non-reclining conditions, e.g., sitting up of the user or sitting of the user on the edge of the bed, are detected by analysis of the pressures in the zones or information from other sources to set pressures particularly suited to such conditions.
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