Humidity Sensor Attachment via Adhesive Sealed Velcro Patch
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Solution Overview
Problem
Conventional humidity detection devices in wearable devices, such as diapers, face issues with detection accuracy and attachment stability due to air interference and unreliable adhesion methods like Velcro or adhesive, which affect their ability to accurately detect moisture levels and remain attached during user movement.
Innovation Solution
A humidity detection device with a Velcro patch that includes a window for the humidity sensor, where one lamination layer has a Velcro LOOP surface and the other a HOOK surface, with an adhesive layer for secure attachment, and a spike or vent hole with a filter to isolate the sensor from external air, allowing it to detect internal humidity without damage to the sample.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Velcro patch is used to attach humidity detection device to diaper, then attachment is reversible and easy to remove, but outside air enters between Velcro and diaper affecting detection accuracy
Solution Approach 1:
The patent introduces an adhesive layer as an intermediary between the Velcro patch and the diaper surface. This adhesive layer creates a sealed attachment that prevents outside air from entering between the Velcro and diaper, while still allowing for reversible attachment and removal. The adhesive mediator solves the contradiction by providing both airtight sealing for accurate detection and ease of operation for attachment/detachment.
2Reliability
If adhesive is used to fix humidity detection device to diaper surface, then attachment is secure, but tearing adhesive from diaper surface may break the diaper surface
Solution Approach 1:
The patent segments the attachment system into two distinct functional layers: a Velcro patch layer for reversible attachment and an adhesive layer for sealing. The Velcro portion can be removed and reattached multiple times without damaging the diaper, while the adhesive layer provides the necessary seal. This segmentation allows the harmful tearing action to be avoided by using the Velcro mechanism for removal rather than forcibly peeling the adhesive layer.
3Adaptability or versatility
If Velcro is used for attachment, then device can be removed and reattached, but Velcro cannot be affixed to smooth diaper surface and separation occurs during movement
Solution Approach 1:
The patent creates a composite attachment structure combining two different materials with complementary properties: Velcro hooks/loops for reversible mechanical attachment and adhesive material for chemical bonding and sealing. The Velcro portion provides adaptability for removal and reattachment, while the adhesive portion provides strong bonding strength and creates a seal on smooth surfaces. Together, these composite materials solve both requirements simultaneously.
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
This design enhances detection accuracy by isolating the sensor from external air and improves attachment stability by direct adhesion to the sample surface, ensuring reliable and precise moisture detection without damaging the diaper.
Implementation Method 1
One side of the first lamination layer away from the second lamination layer includes an adhesive layer for sticking on the sample
Implementation Method 2
The side of the first lamination layer facing the second lamination layer can be a Velcro LOOP surface. The side of the second lamination layer facing the first lamination layer can be a Velcro HOOK surface
Data Source
AI summary
A humidity detecting device includes a substrate, a humidity sensor mounted on the substrate, a vent mounted to the humidity sensor, wherein the vent is configured to guide moisture and air from interior of a sample to the humidity sensor, and a spike fixedly coupled to the humidity sensor. The spike can penetrate and hook to the sample, which attaches the humidity sensor to the sample.