Mattress Pneumatic Control for Bed Frame Section Movement
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Solution Overview
Problem
Hospital bed frames with extendable and retractable sections often require mattresses to be controlled by the bed frame's integrated system, leading to issues like mattress overrun or billowing when used with incompatible mattresses or replacement surfaces.
Innovation Solution
A mattress with its own pneumatic controller and sensor system that adjusts bladder inflation based on bed frame section movements, using sensors like string potentiometers or Hall Effect sensors to communicate with the pneumatic controller and maintain consistent interface pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mattress replacement system with independent pneumatic control is used on a bed frame with extendable and retractable sections, then the mattress can be controlled independently to prevent overrun and billowing, but the system complexity increases due to the need for separate sensors and pneumatic controllers
Solution Approach 1:
The mattress is divided into multiple independently controllable pneumatic sections (head section, foot section, side sections) with separate bladders and control mechanisms. This segmentation allows each section to be independently inflated and deflated to accommodate bed frame movements, preventing mattress overrun while maintaining independent control capability.
Solution Approach 2:
Sensors are integrated into the mattress to detect bed frame movements and provide feedback to the pneumatic controller. The controller uses this feedback information to automatically adjust bladder inflation and deflation, ensuring the mattress remains properly positioned and sized relative to the bed frame sections without requiring manual intervention.
2Ease of manufacture
If the mattress is designed with fixed dimensions to match the bed frame, then manufacturing is simplified, but the mattress cannot adapt to bed frame section extensions and retracts causing overrun or billowing
Solution Approach 1:
The mattress transitions from a fixed-dimensional structure to a dynamic, adjustable structure using inflatable bladders that can change volume and shape. The pneumatic sections can be inflated or deflated in response to bed frame movements, allowing the mattress to adapt its effective dimensions to match the bed frame sections regardless of their extended or retracted position.
Solution Approach 2:
The mattress utilizes changes in pneumatic pressure and volume parameters to adjust the size and shape of individual sections. By controlling the inflation and deflation of bladders, the mattress can change its physical dimensions and configuration to accommodate various bed frame positions, maintaining proper fit and preventing overrun or billowing.
3Device complexity
If the mattress uses traditional integrated control with the bed frame, then the control system is simpler, but the mattress cannot be replaced or reconfigured without replacing the entire bed frame system
Solution Approach 1:
The mattress control system is segmented into independent pneumatic sections with dedicated bladders and control mechanisms for each section. This modular segmentation allows the mattress to be replaced or reconfigured independently from the bed frame, as each section can be individually managed without requiring integration with the bed frame's control system.
Solution Approach 2:
The mattress incorporates its own integrated pneumatic controller and sensors as an intermediary system that operates independently from the bed frame control system. This intermediary capability allows the mattress to be replaced or reconfigured without requiring modifications to or integration with the bed frame's existing control infrastructure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the use of mattresses with independent control on bed frames with extendable and retractable sections, preventing mattress overrun and ensuring consistent pressure, even when the mattress is not originally compatible with the bed frame's control system.
Implementation Method 1
The sensor may comprise a string potentiometer
Implementation Method 2
The sensor may comprise a Hall Effect sensor and a magnet
Implementation Method 3
a pneumatic controller configured to inflate and deflate the at least one inflatable bladder
Data Source
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AI summary
A mattress (200) including one or more sensors (250) to sense movement of at least a portion of the mattress (200) caused by extension or retraction of an associated mattress support section (230) of a bed frame. A pneumatic control system (240) adjusts inflation and/or deflation of at least one inflatable bladder (232,238,234) of the mattress in response to a signal received from the one or more sensors.