Flexible Hygiene Sensor Plates for Accurate Impedance Detection
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Solution Overview
Problem
Existing hygiene monitoring devices with flexible sensing panels often experience unwanted coupling between sensing plates, leading to inaccurate detection of hygienic states due to sensitivity to external factors like the user and their clothing.
Innovation Solution
The use of elongate flexible plates configured to measure impedance between them, with localized electric field lines, reduces the impact of external factors and enhances the accuracy of hygienic state detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If typical square or circular sensing plates are used in a flexible sensing panel, then the sensing panel can conform to the shape of the article, but unwanted coupling between sensing plates occurs leading to inaccurate detection
Solution Approach 1:
The sensing panel is divided into multiple discrete sensing plates arranged in a specific pattern. Each plate is electrically isolated from others, creating separate sensing zones. This segmentation prevents unwanted coupling between plates while maintaining the flexibility needed to conform to the article shape, thereby resolving the contradiction between adaptability and measurement precision.
Solution Approach 2:
The sensing plates are designed with specific local geometries and arrangements optimized for their particular sensing locations on the article. Each plate's shape, size, and position are tailored to detect hygienic state changes at that specific location, improving local measurement accuracy while the overall panel remains flexible and adaptable to the article's contours.
2Area of stationary object
If multiple sensing plates are arranged on a flexible panel to monitor different areas, then coverage is improved, but sensitivity to external factors like user and clothing increases
Solution Approach 1:
The sensing panel is divided into multiple discrete sensing plates arranged in a specific pattern. Each plate is electrically isolated from others, creating separate sensing zones. This segmentation prevents unwanted coupling between plates while maintaining the flexibility needed to conform to the article shape, thereby resolving the contradiction between adaptability and measurement precision.
Solution Approach 2:
The flexible substrate acts as an intermediary layer between the sensing plates and the external environment. It provides electrical isolation and mechanical support, allowing the plates to maintain their positions and orientations while the panel conforms to the article shape. This intermediary structure reduces sensitivity to external factors while maintaining broad coverage.
3Area of stationary object
If sensing plates are offset along the length of the panel to cover more area, then detection coverage increases, but electric field coupling between remote plates occurs
Solution Approach 1:
The sensing panel is divided into multiple discrete sensing plates arranged in a specific pattern. Each plate is electrically isolated from others, creating separate sensing zones. This segmentation prevents unwanted coupling between plates while maintaining the flexibility needed to conform to the article shape, thereby resolving the contradiction between adaptability and measurement precision.
Solution Approach 2:
The sensing plates are arranged in an asymmetric pattern along the length of the panel, with varying spacing and orientations optimized to minimize electric field coupling between remote plates. This asymmetric arrangement allows for extended coverage while maintaining measurement reliability by strategically positioning plates to reduce inter-plate interference.
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 configuration allows for more accurate and localized detection of hygienic states, minimizing interference from external factors and improving the reliability of the monitoring device.
Implementation Method 1
the plates are configured to allow a measurement of an impedance between adjacent plates
Implementation Method 2
by using elongate plates which are configured to measure an impedance therebetween allows for the electric field lines between the plates to be more localised to regions in the immediate vicinity of the hygiene monitoring device
Data Source
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AI summary
There is provided a hygiene monitoring device. The hygiene monitoring device comprises a sensing panel. The sensing panel comprises an elongate flexible panel defining a longitudinal axis. The elongate flexible panel comprises a first pair of plates spaced apart from each other in a direction crossing the longitudinal axis. The elongate flexible panel comprises a second pair of plates spaced apart from each other in a direction crossing the longitudinal axis. The first pair of plates and the second pair of plates are disposed on a flexible substrate of the elongate flexible panel. Each plate of the first pair of plates and each plate of the second pair of plates is elongate along the longitudinal axis of the elongate flexible panel. The first pair of plates is offset along the longitudinal axis with respect to the second pair of plates. The hygiene monitoring device is configured to measure the impedance between two of the plates.