Optical Fiber Corrosion and Humidity Sensing for Distributed Pipelines
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Solution Overview
Problem
Current corrosion sensors are inadequate for real-time, spatially distributed monitoring in long-distance pipelines, failing to detect corrosion and humidity simultaneously, which is crucial for preventing catastrophic failures due to corrosion in oil and natural gas infrastructure.
Innovation Solution
A system comprising optical fiber sensors coated with corrosion proxy materials and humidity/water sensing elements, optically coupled via a single optical fiber, with a distributed optical fiber interrogator for simultaneous detection and location of corrosion and humidity changes, using light power intensity and frequency shifts for monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If point sensors or periodic inspection gauges are used for corrosion monitoring, then device complexity is reduced, but real-time distributed monitoring capability is lost
Solution Approach 1:
The patent combines multiple sensing functions (corrosion monitoring, humidity detection, temperature sensing) into a single optical fiber sensor system. The optical fiber serves as both the transmission medium and the sensing element, with functional coatings applied directly to the fiber surface, eliminating the need for separate point sensors and complex wiring infrastructure.
Solution Approach 2:
The optical fiber sensor system performs multiple functions simultaneously: it monitors corrosion through reflected light intensity changes, detects humidity via polymer coating expansion, and senses temperature through refractive index variations. This multi-functionality in a single device resolves the contradiction by providing comprehensive real-time distributed monitoring without requiring multiple separate sensor systems.
2Measurement precision
If multiple separate sensors are used to monitor different parameters, then measurement precision for each parameter is improved, but device complexity increases
Solution Approach 1:
The patent integrates corrosion, humidity, and temperature sensing capabilities into a single optical fiber platform. Different functional coatings (metallic corrosion proxy materials, hygroscopic polymers) are applied to the same fiber, allowing simultaneous multi-parameter detection without requiring separate sensor installations or complex data correlation systems.
Solution Approach 2:
The optical fiber acts as an intermediary that transduces multiple physical/chemical parameters (corrosion mass loss, humidity levels, temperature changes) into optical signal variations. The fiber's optical properties (reflected intensity, transmission loss, refractive index) serve as the common medium that encodes multiple parameters, simplifying the integration of multi-parameter monitoring.
3Reliability
If conventional corrosion sensors are deployed, then installation cost is reduced, but spatial distribution and real-time monitoring coverage are insufficient
Solution Approach 1:
The optical fiber sensor system is divided into multiple sensing segments along its length, each capable of independent parameter measurement. The fiber can be deployed continuously along pipeline sections, providing spatially distributed monitoring at multiple locations simultaneously, overcoming the point-sensor limitation while maintaining ease of installation through simple fiber routing.
Solution Approach 2:
The same optical fiber infrastructure provides comprehensive monitoring coverage for multiple parameters (corrosion, humidity, temperature) across distributed locations. This universal platform eliminates the need for separate sensor deployments for each parameter, reducing overall deployment complexity while achieving extensive spatial coverage.
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 real-time, distributed monitoring of corrosion and humidity, providing location information and enhancing interrogation distance, thus allowing timely maintenance and preventing pipeline failures.
Implementation Method 1
measuring light power intensity changes
Implementation Method 2
The polymer or hydrogel jacket is selected from a material group that expands or shrinks when exposed to different humidity or water content
Implementation Method 3
measures backscattered light power intensity changes
Implementation Method 4
measures backscattered light power intensity changes and strain changes
Data Source
AI summary
One or more embodiments relate to a sensor configuration system comprising at least one device configured to sense a first parameter; at least one device configured to sense a second parameter, and at least one interrogator device. The at least one device configured to sense the second parameter interfaces with the at least one device configured to sense the first parameter, and the at least one interrogator device interfaces both the at least one device configured to sense the first parameter and the at least one device configured to sense the second parameter where the at least one interrogator device spatially interrogates both the at least one device configured to sense the first parameter and the at least one device configured to sense the second parameter.