Automated Holiday Detector for Pipeline Coating Defect Localization
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Solution Overview
Problem
Existing pipeline defect detection methods, such as handheld high voltage spark generators, are limited in their ability to accurately locate defects in both the longitudinal and circumferential directions, and are prone to human error due to manual data recording.
Innovation Solution
The development of a system that includes a detector, a conductive coil electrode, a ground wire, and electronics to localize defects in a protective coating on a conductive substrate, allowing for the collection, storage, and transmission of data related to defect locations, and enabling the detection of both longitudinal and circumferential defect locations with reduced personnel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If handheld high voltage spark generators are used to detect defects in protective coatings, then defect detection capability is provided, but measurement precision is limited to longitudinal axis only
Solution Approach 1:
The patent transitions from one-dimensional longitudinal defect detection to two-dimensional defect detection by adding circumferential location capability through a rotating coupling mechanism with angular position sensors, thereby improving measurement precision without excessive complexity increase
2Reliability
If manual data recording is used for defect locations, then data collection is simple, but human error increases
Solution Approach 1:
The patent replaces manual mechanical data recording with an automated electronic data collection and storage system using processors and memory, eliminating human error in data recording while managing system complexity through integrated electronics
3Reliability
If automated data collection system is implemented, then human error is reduced, but device complexity increases
Solution Approach 1:
The patent integrates multiple functions into a single detection system including defect detection, automated data collection, storage, and transmission capabilities, achieving improved reliability while managing complexity through functional integration rather than separate systems
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 system enables accurate detection of defects in both longitudinal and circumferential directions on conductive substrates, reduces human error through automated data collection and storage, and allows for efficient data transmission, thereby improving pipeline maintenance and extending the lifespan of pipelines.
Implementation Method 1
inducing, via the spark generator and the electrode, an arc voltage at the defect of the protective coating on the conductive substrate
Implementation Method 2
detecting the arc voltage with a sensor associated with the holiday detector, thereby detecting the defect
Data Source
AI summary
A variety of methods, apparatuses, and systems are disclosed, involving, in one example, a method including traversing the length of a conductive substrate with a holiday detector, inducing an arc voltage at a defect of a coating disposed on the conductive substrate, detecting the arc voltage with sensors, and recording an electrode voltage with electronics disposed at the holiday detector.