Magnetic Probe Geomagnetic Torque Compensation for Precise Positioning
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Solution Overview
Problem
Existing magnetic probing devices face challenges in achieving high-precision positioning due to measurement errors caused by background magnetic fields, particularly geomagnetic fields, especially when working with thick non-magnetic materials like carbon fiber, which are commonly used in ship, aircraft, and automobile construction.
Innovation Solution
A magnetic probing device equipped with a biaxial gimbal mechanism and a compensation magnetic field generator that interacts with the geomagnetic field to cancel out torques, ensuring the magnetic probe's alignment with the magnetic marker, and a display system to guide accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If magnetic probing is performed on thick non-magnetic materials, then the ability to probe through the material is improved, but measurement accuracy deteriorates due to magnetic field attenuation and background magnetic field interference
Solution Approach 1:
The patent applies the principle of converting harm into benefit by using the geomagnetic field, which was previously a source of measurement error, as a reference for calibration. The device measures the magnetic probe's orientation relative to the geomagnetic field direction and uses this information to correct positioning errors, thereby converting the harmful background magnetic field interference into a useful calibration reference that improves measurement accuracy.
Solution Approach 2:
The patent implements feedback by continuously monitoring the magnetic probe's orientation through interaction with the geomagnetic field and using this information to correct positioning errors. The system measures the angular deviation caused by magnetic field attenuation and background field interference, then applies feedback correction to maintain accurate positioning throughout the probing process.
2Measurement precision
If measurement sensitivity is improved by reducing friction in the rotation mechanism, then magnetic probing accuracy is improved, but device complexity increases due to additional compensation mechanisms
Solution Approach 1:
The patent applies mechanics substitution by replacing complex mechanical friction-reduction mechanisms with a magnetic field-based compensation system. Instead of using sophisticated bearing mechanisms or lubrication systems to minimize friction, the device uses magnetic field interactions with the geomagnetic field to compensate for positioning errors, thereby achieving high measurement accuracy with simpler mechanical structures.
3Productivity
If quick positioning is required for reinforcing member installation, then productivity is improved, but positioning accuracy may deteriorate due to time constraints
Solution Approach 1:
The patent applies self-service by enabling the magnetic probe to automatically align with the magnetic marker through its interaction with the geomagnetic field. The device uses the natural magnetic field environment to provide self-correction of positioning errors, allowing quick positioning without requiring complex manual adjustment procedures or time-consuming calibration processes, thereby achieving both high productivity and high precision.
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 device enables high-precision magnetic probing by minimizing measurement errors from background magnetic fields, allowing quick and accurate positioning even on thick non-magnetic materials, facilitating efficient assembly operations.
Implementation Method 1
a magnetic field generator fixed to one end of the support shaft and interacting with a magnetic field formed by the magnetic marker
Implementation Method 2
a compensation magnetic field generator fixed to the other end of the support shaft and interacting with the geomagnetic field, and the magnetic field generator and the compensation magnetic field generator are configured to interact with the geomagnetic field to cancel torques around the rotation center of the magnetic probe
Data Source
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AI summary
Provided is a magnetic probe (10) including: a support shaft (15); a magnetic field generator (11) fixed to one end of the support shaft (15) and interacting with a magnetic field formed by a magnetic marker (5) and a geomagnetic field; and a compensation magnetic field generator (12) fixed to the other end of the support shaft (15) and interacting with the geomagnetic field, the magnetic field generator (11) and the compensation magnetic field generator (12) being configured to interact with the geomagnetic field to offset torques around a rotation center (TC) of the magnetic probe (10).