Cable Type Liquid Leak Sensor with Braided Detection Lines
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Solution Overview
Problem
Conventional liquid leak detection cables are unable to detect nonconductive liquids such as oil or organic solvents due to the absence of a change in resistance value, limiting their use to conductive liquids only.
Innovation Solution
A cable type liquid leak sensor with parallel detection lines braided using a Teflon thread, coated with positively and negatively charged reduced graphene oxide, allowing detection through resistance, conductivity, and capacitance methods, maintaining a chemical-resistant and drug-tolerant property.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional hygroscopic insulator is used to detect liquid leaks, then conductive liquids can be detected through resistance value changes, but nonconductive liquids such as oil or organic solvents cannot be detected
Solution Approach 1:
The patent implements multi-functionality by integrating both resistance-based detection (using hygroscopic insulator with conductors) and capacitance-based detection (using braided detection lines with Teflon thread) within a single liquid leak sensor system. This allows the sensor to detect both conductive liquids (water, acid, alkali) through resistance changes and nonconductive liquids (oil, organic solvents) through capacitance changes, thereby resolving the limitation of detecting only conductive liquids
2Adaptability or versatility
If detection lines are positioned in parallel and braided using Teflon thread, then chemical resistance and detection versatility are improved, but device complexity increases
Solution Approach 1:
The patent merges multiple detection functions into a unified braided cable structure. The detection lines are positioned in parallel and braided together using Teflon thread, combining both resistance-based and capacitance-based detection capabilities within a single integrated structure. This merging approach allows the sensor to maintain versatility in detecting various liquid types while presenting a unified, manageable device form factor
3Measurement precision
If reduced graphene oxide coating is applied to detection lines, then sensitivity to various liquids is improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs composite materials by coating detection lines with reduced graphene oxide, which provides enhanced sensitivity for detecting various liquid types including conductive and nonconductive liquids. The reduced graphene oxide coating creates a material composite that improves the detection surface properties, enabling better interaction with different liquid substances while maintaining the underlying cable structure's mechanical integrity
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
Enables the detection of various liquids including water, acid, alkali, oil, and organic solvents using capacitance, resistance, or conductivity methods, with improved sensitivity and reusability due to the braided structure and chemical-resistant materials.
Implementation Method 1
a cable type liquid leak sensor for detecting a leaking liquid, such as water, acid, alkali, oil, or an organic solvent, using a capacitance, resistance or conductivity method
Implementation Method 2
a pair of conductors is configured to be adjacent to each other and surrounded by the hygroscopic insulator. When moisture is absorbed or passes through the hygroscopic insulator, a leaking liquid is detected based on a change in the resistance value
Implementation Method 3
a cable type liquid leak sensor for detecting a leaking liquid, such as water, acid, alkali, oil, or an organic solvent, using a capacitance, resistance or conductivity method
Data Source
AI summary
A cable type liquid leak sensor includes a first cable unit having a first detection line for detecting a leaking liquid and a first power line in parallel twisted with the first detection line for supplying a power source, a second cable unit having a second detection line for detecting a leaking liquid and a second power line in parallel twisted with the second detection line for supplying a power source, a first fixing unit formed to surround the outside of the first cable unit by a thread made of a chemical-resistant or drug-tolerant material, a second fixing unit formed to surround the outside of the second cable unit by a thread made of a chemical-resistant or drug-tolerant material, and a connection unit having both sides braided to couple the first and second fixing units so that the first and second cable units maintain a given interval.