Liquid Detection System Using Impedance Segmentation
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Solution Overview
Problem
Existing systems for detecting liquid, such as moisture or wetness, often fail to accurately differentiate between liquid presence within a boundary and liquid exiting an area, leading to inadequate notification of potential leaks, which can result in skin irritation and increased labor costs in healthcare settings.
Innovation Solution
A system comprising conductors and a determiner that apply electrical forces to detect changes in impedance, allowing for the differentiation between liquid within an area and liquid at the boundary by measuring impedance thresholds and conductor spacing, thereby providing timely notifications of liquid presence and potential leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing liquid detection systems are used, then liquid presence can be detected, but the systems fail to differentiate between liquid within area and liquid at boundary, leading to inaccurate leak detection
Solution Approach 1:
The detection area is segmented into multiple zones with different conductor configurations. Conductors are positioned at boundaries and within the area, creating distinct detection zones that allow differentiation between liquid at boundary versus liquid within area. This segmentation enables precise location identification and accurate leak detection.
Solution Approach 2:
The system transitions from simple presence detection to spatial location detection by adding dimensional information through multiple conductor positions. By measuring impedance changes across different spatial locations (boundary vs. interior), the system gains the ability to differentiate liquid location, transforming a one-dimensional detection problem into a multi-dimensional spatial analysis.
2Measurement precision
If conductors are spaced closer together to detect liquid at boundary, then boundary detection sensitivity improves, but the ability to distinguish liquid within area decreases
Solution Approach 1:
The conductor array is segmented into boundary conductors and interior conductors with different spacing configurations. Boundary conductors are spaced to optimize boundary detection sensitivity, while interior conductors are positioned to detect liquid within the area. This segmentation allows each conductor group to specialize in its respective detection function while working together for comprehensive liquid location identification.
Solution Approach 2:
Different regions of the detection area have different conductor spacing characteristics. Boundary regions have conductors spaced to maximize sensitivity to liquid at the boundary, while interior regions have conductors positioned to detect liquid within the area. This local optimization of conductor spacing allows the system to maintain high detection sensitivity at boundaries while preserving the ability to distinguish interior liquid presence.
3Ease of operation
If a single impedance threshold is used for liquid detection, then detection simplicity is maintained, but accurate differentiation between liquid within area and at boundary cannot be achieved
Solution Approach 1:
The impedance threshold criterion is segmented into multiple thresholds corresponding to different liquid locations. First threshold detects liquid at boundary, second threshold detects liquid within area. This segmentation of the threshold criterion enables accurate location differentiation while maintaining operational simplicity through automated threshold comparison logic.
Solution Approach 2:
The detection system dynamically selects which impedance threshold to apply based on conductor response patterns. When boundary conductors show impedance change, the first threshold is applied for boundary detection. When interior conductors show impedance change without boundary conductor response, the second threshold is applied for interior liquid detection. This dynamic threshold selection maintains simplicity while enabling precise location differentiation.
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 the presence and spread of liquid, distinguishing between liquid within the area and at the boundary, reducing the risk of skin irritation and optimizing incontinence pad changes, thus minimizing labor and operational costs in healthcare.
Implementation Method 1
A system comprising conductors and a determiner that apply electrical forces to detect changes in impedance
Data Source
AI summary
Systems and methods for detecting a liquid. Detection a liquid may include detecting liquid at a boundary of an area and reporting the presence of the liquid. Reporting liquid at a boundary may prevent leaking of the liquid from the area. Detecting also includes detecting liquid inside the area. The amount of liquid detected inside the boundary may relate to a range of amounts of liquid. The minimum amount of the range may represent the minimum amount of liquid that is permissible in the area prior to taking action to deal with the liquid.