Dynamic Crack Detection Probe Using PMP and MIEC Signals
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Solution Overview
Problem
Existing methods struggle to effectively detect planar defects such as cracks in pipes, particularly in gas pipes, due to high pressure and fast operation speeds, making it difficult to use magnetic flux leakage and ultrasonic testing.
Innovation Solution
A device and method utilizing a probe that acquires permanent magnetic perturbation (PMP) and motion-induced eddy current (MIEC) data, with a controller to determine crack characteristics based on signal patterns, enabling efficient crack detection in moving pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic flux leakage testing is used to detect pipe defects, then volumetric defects and large welding defects can be effectively detected, but planar defects such as cracks cannot be detected
Solution Approach 1:
The patent combines magnetic flux leakage testing with ultrasonic testing into a single integrated detection system. The magnetic flux leakage component detects volumetric defects while the ultrasonic component detects planar defects like cracks, allowing both defect types to be detected simultaneously during one inspection process.
2Adaptability or versatility
If ultrasonic testing is used to detect pipe defects, then planar defects can be detected, but it cannot be used for gas pipes under high pressure
Solution Approach 1:
The detection system is segmented into separate functional modules: a magnetic flux leakage testing module and an ultrasonic testing module. Each module operates independently, allowing the system to adapt to different detection needs. The magnetic flux leakage module handles high-pressure gas pipe detection while the ultrasonic module handles planar defect detection in suitable conditions.
3Productivity
If internal detection is performed in gas pipes with high pressure and fast operation speed, then productivity is improved, but detection stability and accuracy deteriorate
Solution Approach 1:
By merging magnetic flux leakage testing and ultrasonic testing into one integrated system, the patent enables simultaneous detection of both volumetric and planar defects during high-speed internal inspection. This combination maintains detection reliability across different defect types while achieving fast operation speeds for improved productivity.
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 efficiency and stability of crack detection in gas pipes by accurately identifying crack defects under high-speed movement.
Implementation Method 1
a sensing module including a permanent magnet, a magnetic perturbation sensor and a tri-axis Hall sensor; the permanent magnet is configured to form a magnetic perturbation environment
Implementation Method 2
the permanent magnet is configured to form a magnetic perturbation environment and generate eddy current signals
Data Source
AI summary
A device and a method for dynamic crack detection are provided. The device includes a probe configured to acquire permanent magnetic perturbation (PMP) data and motion-induced eddy current (MIEC) data of an inner surface of a pipe, and a controller, in communication with the probe, configured to: receive the PMP data and the MIEC data from the probe; determine the PMP data and the MIEC data as data of a crack in a case where the PMP data and the MIEC data conform to characteristics of a crack defect signal; and determine characteristic data of the crack based on the MIEC data. The PMP data and MIEC data of the inner surface of the pipe are acquired by a probe, which can detect crack defects in gas pipes under high-speed movement, thus improving the efficiency and stability of dynamic crack detection.