Nanocomposite Sensor Coating for Pipeline Leak And Strain Detection
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Solution Overview
Problem
Conventional surface coatings for structural monitoring are either passive or detrimental, failing to detect structural degradation until failure, which can lead to costly repairs and environmental damage, especially in infrastructure like pipelines and storage tanks.
Innovation Solution
A surface coating system integrating a mesh communication system with conductive and nonconductive filaments, embedded with stimulus-sensitive materials that change resistivity in response to hydrocarbons, temperature, pressure, or strain, allowing for continuous health monitoring and early detection of leaks or structural issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surface coatings are used for structural monitoring, then the coating provides corrosion shielding and aesthetic appearance, but the coating fails to actively detect structural degradation until failure occurs
Solution Approach 1:
The patent combines multiple sensing functionalities (piezoelectric, piezoresistive, capacitive, optical, magnetic, thermal, chemical sensors) within a single coating layer, integrating structural health monitoring capabilities directly into the protective coating. This merging allows the coating to simultaneously provide corrosion shielding and active degradation detection, resolving the contradiction between passive protection and active monitoring.
Solution Approach 2:
The coating is designed to perform multiple functions: corrosion protection, aesthetic appearance, and various sensing capabilities (mechanical strain, temperature, chemical presence, etc.). By making the coating universal and multi-functional, it transitions from passive protection to active monitoring, enabling early detection of structural degradation while maintaining its traditional protective roles.
2Loss of time
If no active monitoring system is implemented, then the coating remains simple and passive, but structural failure occurs without early warning
Solution Approach 1:
The sensing elements are embedded within the coating during the manufacturing process, performing preliminary action by continuously monitoring structural parameters before failure occurs. This preliminary detection capability provides early warning of degradation, allowing preventive maintenance while the coating system remains integrated and relatively simple in structure.
3Measurement precision
If multiple sensing layers and electrodes are added to enable active monitoring, then sensing capability improves, but manufacturing complexity and cost increase
Solution Approach 1:
Multiple sensing functionalities are merged into a single integrated coating layer rather than applying separate sensing layers. This consolidation maintains measurement precision through multi-parameter sensing while simplifying the manufacturing process by reducing the number of application steps and material layers required.
Solution Approach 2:
The coating utilizes changes in electrical parameters (impedance, resistance, capacitance) and optical properties that occur naturally with structural degradation. By monitoring these parameter changes rather than requiring complex sensor arrays, the system achieves high measurement precision with relatively simple manufacturing.
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 continuous monitoring of structural health, providing timely warnings of potential failures and precise location of hydrocarbon leaks, reducing repair costs and environmental impact by transmitting electrical signals for data processing and analysis.
Implementation Method 1
the stimulus sensitive material having a resistivity which changes with exposure to a stimulus, the stimulus including at least one of: presence of a hydrocarbon, temperature, pressure, stress, or strain on the stimulus sensitive material
Data Source
AI summary
A system and method for direct and/or active detection and monitoring of civil engineering or other infrastructural structures, and in a preferred embodiment, for hydrocarbon leakage in oil and gas pipelines, storage structures, and/or transportation structures. Particularly, the system and method relate to various nanocomposite sensor coating and data gathering systems. In one embodiment, the apparatus includes a single measurement sensor coating (thin film) sensor. Other embodiments relate to multiple measurement sensor coating systems. The sensor is comprised of either a discrete conductive filament layer, or a single or multiple mesh of interwoven filaments of conductive material in one direction and nonconductive material in a perpendicular direction, as a substrate coated with sensitive coating materials to form a sensor grid. Various embodiments of the sensor coating and their applications are also disclosed.