Dynamic Pulsed Eddy Current Probe for Continuous Scanning
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Solution Overview
Problem
Prior art eddy current probes are limited in their ability to simultaneously scan and acquire data on specimens, requiring cessation of movement for data acquisition, which restricts their effectiveness in non-destructive testing of conductive materials.
Innovation Solution
A dynamic pulsed eddy current probe design featuring at least two magnetizing yokes and a coil assembly, with the second leg of the yokes positioned within the coil, allowing for simultaneous scanning and data acquisition by minimizing the magnetic Reynolds number and using a sensor array to detect secondary transient magnetic flux.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the probe uses prior art circular design with centrally located coil, then the structure is simple, but the probe cannot simultaneously scan and acquire data
Solution Approach 1:
The probe is divided into multiple magnetizing yokes (first yoke and second yoke) with separate legs, allowing independent control of magnetic fields in different regions. This segmentation enables the probe to simultaneously scan and acquire data by creating distinct functional zones that operate independently
Solution Approach 2:
The patent introduces a dimensional change by positioning the coil assembly in a specific spatial relationship with the magnetizing yokes, creating a three-dimensional configuration that enables simultaneous scanning and data acquisition capabilities not present in prior art two-dimensional designs
2Productivity
If the probe moves continuously to scan the specimen, then scanning efficiency is improved, but motion-induced eddy currents create false positives
Solution Approach 1:
The patent converts the harmful motion-induced eddy currents into beneficial effects by using the same principle of eddy current generation for both scanning and data acquisition. The magnetizing yokes are designed to minimize the magnetic Reynolds number, allowing continuous motion while maintaining signal accuracy
Solution Approach 2:
The patent changes the magnetic field parameters by introducing multiple magnetizing yokes with specific geometric configurations and material properties (minimizing magnetic Reynolds number). This parameter optimization allows the probe to operate at higher speeds without generating false positives from motion-induced eddy currents
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 non-destructive examination of conductive materials by dominating the signal with secondary transient magnetic fields, reducing false positives from probe motion-induced eddy currents and allowing continuous scanning and data acquisition.
Implementation Method 1
The coil is energized via a current to create a magnetic field. The magnetic field induces eddy currents in the conductive materials of the test specimen
Implementation Method 2
at least two magnetizing yokes having a first let and a second leg... the second leg of the at least two magnetizing yokes is positioned within the coil assembly
Implementation Method 3
a sensor array containing a plurality of simultaneously sampled magnetometers for detecting the secondary transient magnetic flux emanating from the conductive specimen
Data Source
AI summary
The present invention provides methods and systems for a dynamic pulsed eddy current probe that includes at least two magnetizing yokes having a first leg and a second leg, and a coil assembly comprising a coil, wherein the second leg of the at least two magnetizing yokes is positioned within the coil assembly.