Water Detection Cable Marker for False Alarm Reduction
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Solution Overview
Problem
Existing cable technologies fail to distinguish between brief and prolonged water contact, leading to unnecessary alarms and potential damage, as current water-detection methods are overly sensitive and react to brief exposures, which can occur during manufacturing or installation.
Innovation Solution
Incorporating a water-insoluble, irreversible marker that discolours only after at least 10 minutes of contact, allowing for the detection of prolonged water exposure without false alarms and maintaining visibility even after drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a highly sensitive water-detection material is used in the cable, then water penetration can be detected quickly, but brief water contact during manufacturing or installation will trigger false alarms
Solution Approach 1:
The patent changes the time parameter of the water detection reaction by selecting materials that require prolonged exposure (at least 10 minutes) to trigger a visible color change. This parameter change distinguishes between brief accidental water contact during manufacturing/installation and prolonged water penetration that actually compromises cable integrity, thereby eliminating false alarms while maintaining detection capability.
Solution Approach 2:
The detection system transitions from a static, immediately-reactive state to a dynamic, time-dependent response. The indicating element remains inert during brief water contact and only activates after a threshold time period, creating a dynamic detection mechanism that adapts its sensitivity based on exposure duration rather than water presence alone.
2Measurement precision
If a water-soluble indicating material is used, then water contact is immediately visible, but the marker disappears after drying, preventing detection of past water exposure
Solution Approach 1:
The patent changes the solubility parameter of the indicating material by selecting water-insoluble compounds that undergo irreversible chemical transformation upon prolonged water exposure. These materials maintain their visible indication (color change) even after complete drying, providing permanent evidence of water penetration that occurred during cable operation rather than temporary moisture during manufacturing.
Solution Approach 2:
The patent converts the typically harmful effect of water on cables into a beneficial detection mechanism. The water that would normally cause corrosion and degradation instead triggers an irreversible chemical change in the indicating element, transforming the harmful agent into a useful signal generator that permanently marks water exposure.
3Speed
If materials that react quickly to water are used, then water penetration is detected immediately, but brief water washings during manufacturing cause unnecessary alarms
Solution Approach 1:
The patent changes the kinetic parameter of the water reaction by selecting materials with slower reaction kinetics that require prolonged exposure (minimum 10 minutes) to produce a visible change. This speed adjustment filters out brief water contacts during manufacturing and installation while maintaining detection of sustained water penetration that threatens cable reliability.
Solution Approach 2:
The indicating element is pre-positioned within the cable structure during manufacturing, but remains chemically inert until prolonged water exposure occurs. The material is prepared in advance to react only after a specific time threshold is exceeded, ensuring that preliminary manufacturing processes involving brief water contact do not trigger false indications.
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 solution effectively differentiates between brief and prolonged water contact, reducing unnecessary alarms and ensuring cable integrity by using a marker that remains discoloured after prolonged water exposure, even after drying, thus enhancing cable reliability.
Implementation Method 1
an indicating element irreversibly discolouring after being in contact with water for a time of at least 10 minutes
Data Source
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AI summary
The present invention relates to a cable comprising an indicating element for detecting the infiltration of water into the cable and to a method using such indicating element.