Micro-magnetic Detection for Pipeline Defect Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current nondestructive inspection methods for buried pipelines, such as ultrasonic and turbulent flow detecting, face limitations like the need for coupling agents, poor performance on ferromagnetic materials, and requirement of an exciting source, making them inefficient for detecting internal and surface defects without damaging the pipeline.
Innovation Solution
A micro-magnetic detecting method and device that measure magnetic induction intensity along a surface to identify anomalies, determining defects by comparing signal amplitudes to linear values, and using signal processing techniques like peak-peak analysis and probability statistics to quantify defect sizes without the need for surface preparation or external excitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultrasonic detecting method is used, then surface and internal defects can be detected, but coupling agent is required and air transmission is poor
Solution Approach 1:
The patent replaces the ultrasonic mechanical wave detection system with an electromagnetic field-based micro-magnetic detection system. This substitution eliminates the need for coupling agents and surface preparation, as electromagnetic fields can directly penetrate the pipeline surface without mechanical contact requirements.
Solution Approach 2:
The patent changes the detection parameter from ultrasonic wave propagation to magnetic induction intensity measurement. By measuring magnetic induction intensity along the pipeline surface and analyzing anomalies in the magnetic signal, the system achieves defect detection without requiring surface preparation or coupling agents.
2Reliability
If turbulent flow detecting method is used, then surface defects can be detected, but it functions poorly on ferromagnetic materials and requires exciting source
Solution Approach 1:
The patent replaces the turbulent flow electromagnetic induction system with a micro-magnetic detection system that measures natural or induced magnetic field distributions. This substitution enables effective detection on ferromagnetic materials by utilizing their magnetic properties rather than electrical conductivity, which limits turbulent flow method effectiveness.
Solution Approach 2:
The micro-magnetic detection system can utilize the pipeline's own magnetic properties or residual magnetic fields for detection, reducing or eliminating the need for external exciting sources. The system measures magnetic induction intensity directly, allowing the detected object itself to contribute to the detection process.
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 efficient detection of surface and internal defects in various materials, including ferromagnetic ones, without damaging the pipeline, reducing costs and improving detection accuracy and adaptability.
Implementation Method 1
detecting a magnetic induction intensity along a first direction on a surface of the detected object to generate a detection signal
Data Source
AI summary
A micro-magnetic detecting method includes the steps of: detecting a magnetic induction intensity along a first direction on a surface of a detected object to generate a detection signal, determining whether an amplitude of the detection signal is an anomalous value at a first position of the surface of the detected object, wherein the anomalous value is a value which is inconsistent with a linear value of the detection signal at the first position, and the linear value is a value that satisfies a linear relationship of the detection signal, and determining there is a defect at the first position of the detected object in case that the amplitude of the detection signal is the anomalous value. Accordingly, it detects the magnetic induction intensity on the surface of the detected object so as to detect its surface and internal defects when it remains in its original status.