Magnetic Adsorption Sensing Cable for Pipeline Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing distributed optical fiber sensing (DOFS) technologies face challenges in effectively coupling strain, temperature, and sound waves to sensing cables, leading to inaccurate measurements and inability to simultaneously measure multiple parameters due to low sensitivity and loose attachment to metal pipelines.
Innovation Solution
A fully distributed magnetic adsorption multi-parameter sensing cable with an outer sheath, sensing component, and magnetic adsorption reinforcement (FDMAR) that tightly attaches to metal pipelines using magnetic forces, enhancing the coupling of strain, temperature, and sound waves, and incorporating strain and temperature sensing fibers for simultaneous multi-parameter measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If sensing cables are protected by multiple layers of armor, then the cable strength and protection are improved, but the sensitivity of the sensing cable deteriorates
Solution Approach 1:
The cable structure is segmented into distinct functional layers: the sensing element layer contains bare or minimally protected optical fibers for high sensitivity, while the outer armor layers provide mechanical protection. This segmentation allows different parts of the cable to serve different functions optimally.
Solution Approach 2:
Different parts of the cable have different protection levels: the sensing fibers are kept exposed or minimally coated in the sensing zone to maximize sensitivity, while the outer sheath and armor provide robust protection against environmental damage. The elastic sensitizing component provides localized coupling without full armor protection.
2Ease of operation
If sensing cables are set beside metal pipeline in a freely approaching state, then the cable installation flexibility is improved, but the coupling of strain, temperature and sound waves deteriorates
Solution Approach 1:
An elastic sensitizing component is introduced as an intermediary between the sensing fibers and the metal pipeline. This component provides mechanical coupling that transmits strain, temperature, and acoustic signals from the pipeline to the sensing fibers, while still allowing flexible installation.
Solution Approach 2:
The elastic sensitizing component provides dynamic coupling that adapts to pipeline deformations. The elastic nature allows the component to deform with the pipeline, ensuring continuous contact and signal transmission while accommodating thermal expansion and vibration.
3Ease of manufacture
If gaps exist between sensing cables and metal pipeline, then the cable installation ease is improved, but the temperature field information transmission accuracy deteriorates
Solution Approach 1:
The elastic sensitizing component acts as a thermal and mechanical intermediary that bridges gaps between the cable and pipeline. It conducts temperature field information from the pipeline surface to the sensing fibers while maintaining ease of installation with minimal gap requirements.
4Device complexity
If only single-mode fiber is used in sensing cable, then the cable structure simplicity is improved, but the multi-parameter measurement capability deteriorates
Solution Approach 1:
Multiple types of optical fibers (single-mode and multimode) are merged within the same cable structure. The single-mode fibers enable distributed sensing for strain and temperature, while multimode fibers can be used for other measurements, achieving multi-parameter capability without requiring separate cables.
Solution Approach 2:
The sensing cable is designed with universal applicability for multiple measurement types. By incorporating both single-mode and multimode fibers with different sensing components, a single cable system can perform strain measurement, temperature monitoring, acoustic detection, and other functions.
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 improves the sensitivity and accuracy of strain and temperature measurements, reduces clutter waves, and enables effective transmission of seismic and temperature signals, achieving higher signal-to-noise ratio and resolution for DOFS applications in pipeline monitoring and oil/gas exploration.
Implementation Method 1
a magnetic adsorption force between the FDMAR and the wall of the metal pipeline
Data Source
AI summary
A fully distributed magnetic adsorption multi-parameter sensing cable, which is configured to be installed on the wall of a metal pipeline, includes an outer sheath, a sensing component arranged in the outer sheath, and a fully distributed magnetic adsorption reinforcement (FDMAR) arranged in the outer sheath and on a peripheral side of the sensing component. The outer sheath is attached to the wall of the metal pipeline by the FDMAR. A magnetic adsorption force between the FDMAR and the wall of the metal pipeline is able to be adjusted by changing the size of the FDMAR and the distance between the FDMAR reinforcement and the wall of the metal pipeline. The fully distributed magnetic adsorption multi-parameter sensing cable has the advantages of good adsorption effect and high sensitivity.