Anomaly Prioritization in Buried Linear Conductors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for monitoring buried pipelines struggle to accurately prioritize coating anomalies due to variations in probe spacing, depth of burial, and current levels, leading to false impressions of anomaly sizes and inefficient excavation efforts.
Innovation Solution
A method that calculates prioritization values for anomalies using effective probe spacing, depth of cover, and electrical current, allowing for ranking of anomalies by magnitude, and adjusts probe spacing for increased sensitivity in deep burial scenarios, enabling accurate voltage gradient measurements under challenging conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If common probe spacing is maintained for all survey points, then measurement consistency is improved, but measurement precision deteriorates due to variations in depth of burial and current levels
Solution Approach 1:
The patent applies parameter changes by introducing effective probe spacing as a calculated parameter that varies with depth of burial and current level. Instead of using fixed physical probe spacing, the system calculates effective probe spacing based on actual survey conditions (depth of cover and measured current), thereby adapting the measurement parameter to match the specific burial conditions at each survey point while maintaining standardized data processing.
2Measurement precision
If probe spacing is increased for deep burial pipelines, then voltage gradient sensitivity is improved, but measurement complexity increases
Solution Approach 1:
The patent implements dynamics by making probe spacing adjustable rather than fixed. The system dynamically determines optimal probe spacing based on the depth of burial conditions - using larger spacing for deep burial pipelines to maintain sensitivity and smaller spacing for shallow burial. This dynamic adaptation allows the measurement system to optimize its configuration for each specific survey condition without requiring complex manual intervention.
Solution Approach 2:
The system changes the probe spacing parameter based on depth of burial conditions. For pipelines buried deeper than a predetermined threshold, the patent automatically increases the probe spacing to maintain adequate voltage gradient sensitivity. This parameter adjustment is calculated based on the relationship between burial depth and signal attenuation, ensuring optimal measurement conditions for each scenario.
3Reliability
If standardized prioritization method is implemented, then false assessments are reduced, but measurement and calculation complexity increases
Solution Approach 1:
The patent implements feedback by using the measured current at each survey point to adjust the effective probe spacing calculation. The system measures the actual current flowing through the pipeline, uses this feedback to calculate the appropriate effective probe spacing for that specific condition, and then uses this adjusted spacing to compute the voltage gradient and anomaly prioritization value. This feedback loop ensures that the measurement system adapts to real-time conditions rather than relying on predetermined fixed parameters.
Solution Approach 2:
The patent introduces effective probe spacing as an intermediary parameter that mediates between the physical probe spacing and the actual measurement conditions. Instead of directly using fixed probe spacing in calculations, the system first calculates effective probe spacing based on depth of burial and current level, then uses this intermediary value to compute voltage gradients and prioritization scores. This intermediary parameter simplifies the complex relationship between multiple variables while maintaining measurement accuracy.
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
This approach provides a standardized method for prioritizing coating anomalies, reducing false assessments and excavation costs by normalizing voltage gradients and enhancing measurement sensitivity, ensuring that the most critical anomalies are identified and addressed effectively.
Implementation Method 1
obtaining prioritization values for a plurality of anomalies along a linear conductor... Each voltage gradient prioritization value is obtained using the probe spacing of the voltage probes, depth of burial or depth of cover (DOC) of the pipeline, and electrical current level at the point of measurements
Data Source
AI summary
A method of prioritizing anomalies in a linear conductor buried under a ground surface includes the steps of obtaining prioritization values for a plurality of anomalies along a linear conductor, and ranking the prioritization values according to magnitude. For each anomaly, a prioritization value is obtained by: locating an anomaly; for each anomaly, determining a current, a depth of cover, and a voltage gradient using spaced voltage probes; using the depth of cover and the voltage gradient, calculating an effective probe spacing of the first and second voltage probes relative to the anomaly on the conductor; and determining the prioritization value of the anomaly based on a linear relationship between the voltage gradient and the product of the current and the effective probe spacing.