PATIENT SUPPORT OVERLOAD OR OBSTRUCTION DETECTION

摘要

A patient support device, such as a bed, includes a frame, a backrest or other platform movable with respect to the frame, and an actuator connecting the backrest to the frame. The actuator is configured to raise and lower, or otherwise move, the backrest or platform with respect to the frame. An actuator sensor is provided to sense movement of the actuator. A backrest sensor is provided to sense movement of the backrest. A controller is coupled to the actuator, the actuator sensor, and the backrest sensor. The controller is configured to stop the actuator from raising the backrest in response to a characteristic signal from the actuator sensor. The controller is further configured to stop the actuator from lowering the backrest in response to at least a characteristic signal from the backrest sensor. The characteristic signals are defined to prevent the backrest or platform from moving when obstructed or overloaded in order to reduce the chance of damage or injury.

主权项

1. A bed comprising:
a bed frame; a backrest pivotable with respect to the bed frame; a backrest actuator connecting the backrest to the bed frame, the backrest actuator configured to raise and lower the backrest with respect to the bed frame; an actuator sensor positioned to sense movement of the backrest actuator; a backrest sensor positioned to sense movement of the backrest; and a controller coupled to the backrest actuator, the actuator sensor, and the backrest sensor, the controller configured to stop the backrest actuator from raising the backrest in response to a characteristic signal from the actuator sensor, the controller further configured to stop the backrest actuator from lowering the backrest in response to characteristic signals from both the actuator sensor and the backrest sensor.