System and method for positioning a multi-pole magnetic structure

摘要

Systems and methods for arranging magnetic sources for producing field patterns having high gradients for precision positioning, position sensing, and pulse generation. Magnetic fields may be arranged in accordance with codes having a maximum positive cross correlation and a maximum negative cross correlation value in proximity in the correlation function, thereby producing a high gradient slope corresponding to a high gradient force or signal associated with the magnetic structure. Various codes for doublet, triplet, and quad peak patterns are disclosed. Applications include force and torque pattern generators. A variation including magnetic sensors is disclosed for precision position sensing. The forces or sensor outputs may have a precision zero crossing between two adjacent and opposite maximum correlation peaks.

主权项

1. A system for positioning a part comprising:
a first magnetic assembly comprising a plurality of magnetic field devices, said magnetic field devices arranged according to a first code, said first code derived from a source code by replacing each source code element by a product of the source code element and a first symbol, said first symbol having at least two elements, at least one element is nonzero; said source code having an autocorrelation function with a single maximum magnitude and a maximum off maximum peak value less than half of the single maximum magnitude; a second magnetic assembly comprising a second plurality of magnetic field devices, said magnetic field devices arranged according to a second code, said second code derived from said source code by replacing each source code element by a product of the source code element and a second symbol, said second symbol having at least two values, at least one value is nonzero; wherein the first symbol and second symbol have the same length.