Magnetic Coupling Calibration for Pull Force and Degaussing Control
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Solution Overview
Problem
Existing magnetic coupling devices face challenges in accurately determining the actual pull force exerted on ferromagnetic targets due to factors like air gaps, uneven contact, and stray magnetic fields, and require separate sensors for feedback, which are costly and vulnerable to damage, while also needing separate steps for demagnetization.
Innovation Solution
Incorporating magnetic field sensors and a logic control circuit to monitor and calibrate magnetic flux leakage, allowing for real-time feedback on coupling quality and position, and integrating degaussing capability within the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate magnetic field sensors are added to monitor pull force and coupling quality, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines the magnetic field sensing function with the existing magnetic coupling device structure. The magnetic field sensors are integrated into the device housing or mounting structure, allowing the same magnetic field that creates the coupling force to be monitored by sensors already positioned in the magnetic circuit path. This merging eliminates the need for separate external sensing systems.
Solution Approach 2:
The patent implements feedback by using magnetic field sensors to continuously monitor the magnetic flux density in the magnetic circuit. The sensor output signals are fed to a controller that compares the measured values against reference values and adjusts the magnetic coupling force or generates alerts when coupling quality deteriorates, creating a closed-loop control system that improves measurement utility.
2Reliability
If separate demagnetization processing steps are used, then magnetic field control is improved, but productivity is reduced
Solution Approach 1:
The patent merges the demagnetization function with the magnetic coupling device by incorporating demagnetization coils or alternating field generation capability into the existing device structure. The same device that creates the magnetic coupling force can also generate alternating or decaying magnetic fields to demagnetize the workpiece, eliminating the need for separate demagnetization equipment and processing steps.
Solution Approach 2:
The patent uses periodic alternating magnetic fields generated by the integrated demagnetization system to progressively reduce the residual magnetism in the workpiece. By applying alternating fields at decreasing amplitudes or frequencies, the system efficiently removes magnetic memory from the workpiece without requiring separate processing steps, thereby maintaining productivity.
3Measurement precision
If magnetic field sensors are positioned close to the working face for accurate measurement, then measurement precision is improved, but the sensors become more vulnerable to damage
Solution Approach 1:
The patent nests the magnetic field sensors within protective housings or mounting structures that are themselves part of the magnetic coupling device. The sensors are positioned close to the working face for accurate measurement but are enclosed within the device's structural elements, which protect them from mechanical damage, contamination, and environmental factors while allowing them to sense the magnetic field effectively.
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 precise determination of coupling status and position, reduces integration costs, and provides efficient demagnetization without additional processing steps, enhancing robotic operation and safety.
Implementation Method 1
devices which use magnetic fields in order to attract and/or secure a ferromagnetic target to a working face of the device
Implementation Method 2
attract and/or secure a ferromagnetic target
Implementation Method 3
magnetic field sensors and a logic control circuit to monitor and calibrate magnetic flux leakage
Implementation Method 4
integrating degaussing capability within the device
Data Source
AI summary
Magnetic coupling devices are disclosed having magnetic field sensors. The magnetic coupling device may include a calibration module for calibrating the magnetic coupling devices.