Magnetic Inspection Apparatus Uniformizing Magnetization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional magnetic body inspection apparatuses generate noise due to non-uniform magnetization of magnetic bodies, which affects detection accuracy.
Innovation Solution
A magnetic body inspection apparatus that applies a magnetic field intersecting with the longitudinal direction of a long material to adjust and uniformize the magnetization, using a detector to acquire signals in the longitudinal direction, thereby reducing noise and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a magnetic field is applied in the longitudinal direction to detect flaws in a magnetic body, then detection capability is improved, but noise is generated due to non-uniform magnetization
Solution Approach 1:
The magnetic field application unit applies a magnetic field in the longitudinal direction before the detector performs measurement, to uniformize the magnetization distribution. This preliminary action eliminates non-uniform magnetization that would otherwise generate noise during detection, thereby improving signal quality without sacrificing detection capability
2Measurement precision
If the detector is fixed to the long material in the longitudinal direction, then detection alignment is improved, but attachment difficulty increases
Solution Approach 1:
The attachment structure changes the attachment direction from the longitudinal direction to the radial direction (short-side direction). This dimensional change allows the detector to be easily attached to the outer peripheral surface of the long material while maintaining proper alignment for longitudinal flaw detection, solving both attachment ease and detection precision requirements
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 apparatus effectively reduces noise from non-uniform magnetization, enhancing the detection of flaws in magnetic bodies by ensuring uniform magnetization, allowing for accurate inspection even in challenging configurations.
Implementation Method 1
a magnetic field application unit configured to apply, in a direction that intersects with a longitudinal direction of a long material, a magnetic field to the long material including a magnetic body to be inspected
Implementation Method 2
a detector configured to excite, in the longitudinal direction of the long material, magnetization of the magnetic body to which the magnetic field is applied by the magnetic field application unit
Implementation Method 3
the detection coil that detects an induced electromotive force in the longitudinal direction of the steel bar to which the magnetic field is applied
Data Source
AI summary
A magnetic body inspection apparatus includes a magnetic field application unit configured to apply a magnetic field to a long material including a magnetic body to be inspected, a detector configured to excite, in a longitudinal direction of the long material, magnetization of the magnetic body, the detector being configured to acquire a detection signal based on the magnetic field of the magnetic body that has been excited, and a detection apparatus body including the magnetic field application unit and the detector, the detection apparatus body being configured to be attachable to the long material in a short-side direction of the long material.