Sensor for Absorbent Article with Modular Contact System
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Solution Overview
Problem
Current absorbent articles lack effective monitoring systems to indicate when they become wet due to incontinence, making it difficult for caregivers to determine when they need to be changed, and existing wetness detection systems have limitations in accuracy and usability.
Innovation Solution
Incorporation of a sensor system with metal strips between the topsheet and backsheet of the absorbent article, connected to an indicator device that senses wetness and provides a visual or audible signal, and the use of conductive ink and a wetness indicator to notify caregivers of the article's status, with the option of communication with a remote device for size verification and changing reminders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor system with metal strips and indicator device is incorporated into the absorbent article, then wetness detection accuracy is improved, but device complexity increases
Solution Approach 1:
The sensor system is divided into separate functional components: metal strips embedded in the absorbent article for wetness sensing, and a separate indicator device for signal generation. This segmentation allows each component to be optimized independently while reducing overall system complexity through modular design.
Solution Approach 2:
The patent introduces an intermediary indicator device that acts as a mediator between the wetness sensor and the user. This intermediary component translates the physical wetness detection into user-friendly visual or audible signals, simplifying the interaction without increasing the core sensing complexity.
2Reliability
If existing wetness detecting systems are used, then the absorbent article can indicate wetness, but reliability is insufficient due to limitations in accuracy and usability
Solution Approach 1:
The system changes the detection parameter from indirect moisture sensing to direct electrical conductivity measurement using metal strips. This parameter change enables more reliable and accurate wetness detection by measuring the conductive properties of the absorbent material when saturated with fluid.
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 sensor system accurately detects wetness and provides timely notifications to caregivers, improving the management of absorbent articles and reducing the risk of skin irritation and discomfort by ensuring timely changes.
Implementation Method 1
a sensor system with metal strips between the topsheet and backsheet of the absorbent article, connected to an indicator device that senses wetness
Data Source
AI summary
A sensor for monitoring wetness in a diaper or other absorbent article includes a housing that attaches to the absorbent article. The sensor may include inner and outer housing portions that capture an edge of the absorbent article between the housings. The sensor may include contacts that electrically connect with a pair of contact strips embedded in the absorbent article. The distance between the embedded strips may vary depending on the size of the absorbent article. The sensor may include multiple pairs of contacts that are spaced apart to match the distance between the contact strips for the variously sized absorbent articles. In this way, depending on the pair of contacts connected to the contact strips, the sensor may indicate the size of the absorbent article. The sensor may have a housing with a cavity and a lid that closes the cavity. The lid may be secured with a latch.