Capacitive Fitted Sheet for Safe Incontinence Detection
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Solution Overview
Problem
Existing incontinence detection systems for bedridden individuals face challenges such as precise positioning requirements, electrical risks, false alarms due to sweating, incompatibility with fecal incontinence, and complexity in cleaning, while compromising comfort and safety.
Innovation Solution
A capacitive sensor-equipped fitted sheet with capacitive sensors woven into the fabric, a processing unit, and a method for detecting incontinence by measuring active lengths and triggering alerts, ensuring comfort, safety, and compatibility with pressure ulcer prevention measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive strips or electrodes are used to detect liquid, then detection capability is achieved, but electrical risks and false alarms due to sweating occur
Solution Approach 1:
The patent replaces electrical conduction-based detection with capacitive sensing technology. The capacitive sensors detect liquid through changes in electrical capacitance caused by the liquid's dielectric properties, eliminating direct electrical contact and associated risks while maintaining detection capability. This substitution resolves the contradiction by using a different physical principle that avoids the harmful electrical effects.
Solution Approach 2:
The patent changes the detection parameter from electrical conductivity to electrical capacitance. By measuring capacitance changes rather than current flow, the system can detect liquid presence without creating electrical hazards or triggering false alarms from sweat, thus resolving the reliability versus safety contradiction.
2Measurement precision
If precise positioning of sensors is required for accurate detection, then detection accuracy improves, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent divides the detection system into multiple distributed capacitive sensing zones across the sheet. This segmentation allows the system to detect liquid presence in multiple locations simultaneously, maintaining high detection accuracy while reducing the need for precise manual positioning, as the distributed sensors collectively cover the detection area.
Solution Approach 2:
The capacitive sensing sheet is designed to function effectively regardless of specific sensor positioning, making the system universal and adaptable to different user positions and movements. This multi-functionality resolves the contradiction by enabling accurate detection without requiring precise or fixed positioning.
3Reliability
If conventional detection systems are used, then detection function is achieved, but compatibility with pressure ulcer prevention measures and comfort are compromised
Solution Approach 1:
The patent uses a flexible capacitive sensing sheet that can be integrated into bedding without interfering with pressure ulcer prevention measures such as specialized mattresses or positioning devices. The thin-film capacitive sensors conform to the bed surface and do not create rigid structures that would compromise comfort or care practices, thus resolving the contradiction between detection function and adaptability.
4Reliability
If complex cleaning procedures are required for sensor maintenance, then sensor reliability is maintained, but ease of manufacture and operation deteriorate
Solution Approach 1:
The capacitive sensing sheet is designed as a disposable or easily replaceable component that can be cleaned or discarded after use. This approach maintains sensor reliability by allowing replacement rather than complex maintenance, while significantly reducing cleaning complexity and associated operational burden.
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
The system effectively detects incontinence episodes, reduces electrical risks, maintains comfort, and allows for easy cleaning, while being compatible with existing care practices, enhancing caregiver response times and reducing skin complications.
Implementation Method 1
a capacitive sensor-equipped fitted sheet with capacitive sensors woven into the fabric
Data Source
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AI summary
System (3) for detecting an episode of incontinence in a bedridden person comprising a sheet (4) suitable for covering a mattress (2) of a bed (1), capacitive sensors (5) arranged transversely on the sheet, each sensor being suitable for measuring an active length (L) corresponding to a sensor length covered by an organic fluid, a processing unit (6) configured to collect and analyze the active lengths measured by the sensors, one sensor being attached to the sheet.