Bed device
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Solution Overview
Problem
Conventional bed devices require constant operator attention to prevent hazardous situations, especially in home settings where operators may not be familiar with the controls, leading to increased risk and burden, as they need to manually stop operations and adjust patient positions during bed movements like back rise or knee rise.
Innovation Solution
A bed device equipped with an operation section, a controller, a detector, and a limitation table that stores predefined limitation areas and corresponding control actions, allowing the system to automatically adjust bed movements and notify operators of potential hazards, thereby reducing operator burden and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alarm notification is implemented when patient is in hazardous position, then safety awareness is improved, but operator burden increases due to need for constant manual monitoring
Solution Approach 1:
The bed device performs self-monitoring of patient position and automatically executes protective actions (suspending bed movement, notifying operator) without requiring continuous manual operator intervention. The system serves itself by detecting hazardous positions and autonomously responding to prevent accidents.
Solution Approach 2:
The system continuously monitors patient position and provides feedback to the operator when hazardous positions are detected. This closed-loop feedback mechanism enables automatic safety responses, reducing the need for constant operator attention while maintaining high safety awareness.
2Reliability
If automatic limitation control is implemented based on patient position, then safety is improved, but device complexity increases
Solution Approach 1:
The system pre-defines hazardous position ranges and corresponding protective actions in advance. When the patient enters a predetermined hazardous zone, the system automatically executes pre-programmed protective measures (suspending movement, issuing notifications), eliminating the need for complex real-time decision-making logic.
Solution Approach 2:
The bed surface is divided into multiple detection zones with different hazard levels. Each zone has predefined safety rules and corresponding protective actions. This segmentation approach simplifies the control logic by breaking down the complex safety management into discrete, manageable zones with specific response protocols.
Data Source
AI summary
A bed device includes: an operation section that receives an operation input; a controller that controls a movement of the bed in accordance with the operation input; a detector that detects a position of a patient on the bed; and, a limitation table that stores a limitation area set on the bed in association with a limitation content, wherein when the position of the patient detected by the detector is included in the limitation area, the limitation content is read out from the limitation table so as to control the controller in accordance with the limitation content. With this configuration, it is possible to provide a higher safety bed device which can not only notify the danger based on the bed movement but also limit the movement of the bed in accordance with the status of the patient or the bed device.