Method for Developing a Sensing System to Measure the Attractive Force between a Magnetic Structure and its Target by Quantifying the Opposing Residual Magnetic Field (ORMF)

摘要

The subject of this patent is a novel method for developing a sensing system that can determine a magnetic attraction force between a magnetic structure and its target level by using an Opposing Residual Magnetic Field (ORMF) to quantify said magnetic attraction force. Steps for the development and implementation of an ORMF Sensing System are set forth herein.

主权项

1. A method for developing a sensing system to measure the attractive force between a magnetic structure and its target by quantifying the opposing residual magnetic field (ORMF), comprised of the following steps:
i) Employing a permanent magnet base comprised of a magnetic structure which in turn is comprised of one or more core elements, wherein each core element is comprised of one or more permanent magnets aligned in such a manner that the north pole face of each permanent magnet is adjacent to a pole conduit and conversely the south pole face of each permanent magnet is adjacent to a pole conduit; ii) Placing the magnetic structure onto a ferromagnetic target of a given thickness; iii) Activating the magnetic field of the magnetic structure; iv) Placing the magnetic structure onto a ferromagnetic target of a given thickness; v) Employing breakaway testing means to measure the breakaway force required to detach the magnetic structure from a given thickness of the ferromagnetic target; vi) Determining the breakaway force for a given thickness of the ferromagnetic target; vii) Changing the thickness of the ferromagnetic target from a given thickness to a changed thickness and measuring and determining the breakaway force required to detach the magnetic structure from the ferromagnetic target with the changed thickness; viii) Continuing to change the thickness of the ferromagnetic target and measuring and determining the breakaway force required to detach the magnetic structure from the ferromagnetic target with each change of thickness until the measured and determined breakaway force no longer appreciably increases with an increase in the ferromagnetic target thickness; ix) Selecting a field sensing means which is capable of measuring the magnetic field of the magnetic structure; x) Locating said field sensing means within said permanent magnet base such that said field sensing means is capable of measuring the magnetic field of the magnetic structure; xi) Sensing and measuring the magnetic field of the magnetic structure for various target thicknesses which may include a target thickness of zero for one or more field sensing means locations; xii) Determining the magnetic field of the magnetic structure in correlation with field sensing means location, target thickness or breakaway force; xiii) Noting various field sensing means locations within said permanent magnet base with respect to the breakaway force and the magnetic fields determined; xiv) Selecting the optimal field sensing means location within said permanent magnet base for various target thicknesses which may include a zero thickness target; xv) Verifying the optimal field sensing means location within said permanent magnet base by interpolating and confirming its accuracy by employing various target thicknesses; xvi) Correlating output of the field sensing means to a calculated breakaway force; and xvii) Providing the breakaway force for the ferromagnetic target.