Magnetic force profile system using coded magnet structures

• US 7,839,247 B2
• Filed: 06/05/2009
• Issued: 11/23/2010
• Est. Priority Date: 04/04/2008
• Status: Expired due to Fees

• Current Assignee: Correlated Magnetics Research, LLC
• Original Assignee: Cedar Ridge Research LLC
• Inventors: Fullerton, Larry W., Richards, James Lee, Roberts, Mark
• Primary Examiner(s): Barrera, Ramon M
• Application Number:
  US12/479,013
• Publication Number:
  US 20090251255A1
• Time in Patent Office: 536 Days
• Field of Search: 335/285, 335302-306, 243/03, 310/80, 310/90.5, 310/103, 310/308, 310/309
• US Class Current: 335/306
• CPC Class Codes: H01F 7/0284 using a trimmable or adjustable magnetic circuit, e.g. for a symmetric dipole or quadrupole magnetic field
• CPC Class Codes: Y10T 24/32 having magnetic fastener

Abstract

An improved field emission system and method. The invention pertains to field emission structures comprising electric or magnetic field sources having magnitudes, polarities, and positions corresponding to a desired spatial force function where a spatial force is created based upon the relative alignment of the field emission structures and the spatial force function. The invention herein is sometimes referred to as correlated magnetism, correlated field emissions, correlated magnets, coded magnetism, or coded field emissions. The magnetic field sources may be arranged according to a code having a desired autocorrelation function. In particular, a high peak to sidelobe autocorrelation performance may be found desirable. Specific exemplary embodiments are described with magnetic field sources arranged in a ring structure. Exemplary codes are described and applied to magnetic field source arrangements. Specific codes found by the inventors are described.

Claims

1. A magnetic field force generator having a predefined force profile comprising:

a first magnet structure comprising a first plurality of magnets arranged according to a first pattern; and

a complementary magnet structure comprising a complementary plurality of magnets complementary to said first magnet structure;

said first pattern based on a variable code having an autocorrelation function with a single maximum peak per code modulo;

said first magnet structure and said complementary magnet structure having an operational range of relative position;

wherein magnetic force between said first magnet structure and said complementary magnet structure as a function of position within said operational range corresponds to said autocorrelation function, wherein said first plurality of magnets arranged according to said first pattern comprises a magnet pattern of nine component magnets at relative coordinates of

+1(0,0), −

1(0,1), +1(0,2), −

1(1,0.5), +1(1,1.5), −

1(1,2.5), +1(2,0), −

1(2,1), +1(2,2), or said magnet pattern reflected about the x axis, or said magnet pattern reflected about the y axis, or said magnet pattern with the x and y axes transposed, where within the notation s(x,y), “

s”

indicates the respective component magnet strength and polarity and “

(x,y)”

indicates x and y coordinates of a center of the respective component magnet relative to a reference position (0,0).

2. A magnetic field force generator having a predefined force profile comprising:

a first magnet structure comprising a first plurality of magnets arranged according to a first pattern; and

a complementary magnet structure comprising a complementary plurality of magnets complementary to said first magnet structure;

said first pattern based on a variable code having an autocorrelation function with a single maximum peak per code modulo;

said first magnet structure and said complementary magnet structure having an operational range of relative position;

wherein magnetic force between said first magnet structure and said complementary magnet structure as a function of position within said operational range corresponds to said autocorrelation function, wherein said first plurality of magnets arranged according to said first pattern comprises a magnet pattern of nineteen component magnets at relative coordinates;

−

1(3,7), −

1(4,5), −

1(4,7), +1(5,3), +1(5,7), −

1(5,11), +1(6,5), −

1(6,9), +1(7,3), −

1(7,7), +1(7,11), −

1(8,5), −

1(8,9), +1(9,3), −

1(9,7), +1(9,11), +1(10,5), −

1(10,9) +1(11,7), or said magnet pattern reflected about the x axis, or said magnet pattern reflected about the y axis, or said magnet pattern with the x and y axes transposed, where within the notation s(x,y), “

s”

indicates the respective component magnet strength and polarity and “

(x,y)”

indicates x and y coordinates of a center of the respective component magnet relative to a reference position (0,0).

3. A magnetic field force generator having a predefined force profile comprising:

a first magnet structure comprising a first plurality of magnets arranged according to a first pattern; and

a complementary magnet structure comprising a complementary plurality of magnets complementary to said first magnet structure;

said first pattern based on a variable code having an autocorrelation function with a single maximum peak per code modulo;

said first magnet structure and said complementary magnet structure having an operational range of relative position;

wherein magnetic force between said first magnet structure and said complementary magnet structure as a function of position within said operational range corresponds to said autocorrelation function, wherein the first pattern is a random or pseudorandom code, wherein the pseudorandom code is a linear feedback shift register code.

4. A magnetic field force generator having a predefined force profile comprising:

a first magnet structure comprising a first plurality of magnets arranged according to a first pattern; and

a complementary magnet structure comprising a complementary plurality of magnets complementary to said first magnet structure;

said first pattern based on a variable code having an autocorrelation function with a single maximum peak per code modulo;

said first magnet structure and said complementary magnet structure having an operational range of relative position;

wherein magnetic force between said first magnet structure and said complementary magnet structure as a function of position within said operational range corresponds to said autocorrelation function, wherein the first pattern is a random or pseudorandom code, wherein the pseudorandom code is a Barker code.

5. A magnetic field force generator having a predefined force profile comprising:

a first magnet structure comprising a first plurality of magnets arranged according to a first pattern; and

a complementary magnet structure comprising a complementary plurality of magnets complementary to said first magnet structure;

said first pattern based on a variable code having an autocorrelation function with a single maximum peak per code modulo;

said first magnet structure and said complementary magnet structure having an operational range of relative position;

wherein magnetic force between said first magnet structure and said complementary magnet structure as a function of position within said operational range corresponds to said autocorrelation function, wherein the first pattern is a random or pseudorandom code, wherein the pseudorandom code is a Gold code.

6. A magnetic field force generator having a predefined force profile comprising:

a first magnet structure comprising a first plurality of magnets arranged according to a first pattern; and

a complementary magnet structure comprising a complementary plurality of magnets complementary to said first magnet structure;

said first pattern based on a variable code having an autocorrelation function with a single maximum peak per code modulo;

said first magnet structure and said complementary magnet structure having an operational range of relative position;

wherein magnetic force between said first magnet structure and said complementary magnet structure as a function of position within said operational range corresponds to said autocorrelation function, wherein the first pattern is a random or pseudorandom code, wherein the pseudorandom code is a Kasami code.

7. A magnetic field force generator having a predefined force profile comprising:

a first magnet structure comprising a first plurality of magnets arranged according to a first pattern; and

a complementary magnet structure comprising a complementary plurality of magnets complementary to said first magnet structure;

said first pattern based on a variable code having an autocorrelation function with a single maximum peak per code modulo;

said first magnet structure and said complementary magnet structure having an operational range of relative position;

wherein magnetic force between said first magnet structure and said complementary magnet structure as a function of position within said operational range corresponds to said autocorrelation function, wherein the first pattern is a random or pseudorandom code, wherein the pseudorandom code is a Golomb ruler code.

8. A magnetic field force generator having a predefined force profile comprising:

a first magnet structure comprising a first plurality of magnets arranged according to a first pattern; and

a complementary magnet structure comprising a complementary plurality of magnets complementary to said first magnet structure;

said first pattern based on a variable code having an autocorrelation function with a single maximum peak per code modulo;

said first magnet structure and said complementary magnet structure having an operational range of relative position;

wherein magnetic force between said first magnet structure and said complementary magnet structure as a function of position within said operational range corresponds to said autocorrelation function, wherein the first pattern is a random or pseudorandom code, wherein the pseudorandom code is a Costas array.

9. A magnetic field force generator having a predefined force profile comprising:

a first magnet structure comprising a first plurality of magnets arranged according to a first pattern; and

a complementary magnet structure comprising a complementary plurality of magnets complementary to said first magnet structure;

said first pattern based on a variable code having an autocorrelation function with a single maximum peak per code modulo;

said first magnet structure and said complementary magnet structure having an operational range of relative position;

wherein magnetic force between said first magnet structure and said complementary magnet structure as a function of position within said operational range corresponds to said autocorrelation function, wherein the first pattern is a random or pseudorandom code, wherein the random or pseudorandom code defines a magnet spacing pattern, wherein the pseudorandom code is a Golomb ruler sequence.

10. A magnetic field force generator having a predefined force profile comprising:

a first magnet structure comprising a first plurality of magnets arranged according to a first pattern; and

a complementary magnet structure comprising a complementary plurality of magnets complementary to said first magnet structure;

said first pattern based on a variable code having an autocorrelation function with a single maximum peak per code modulo;

said first magnet structure and said complementary magnet structure having an operational range of relative position;

wherein magnetic force between said first magnet structure and said complementary magnet structure as a function of position within said operational range corresponds to said autocorrelation function, wherein the first pattern is a random or pseudorandom code, wherein the random or pseudorandom code defines a magnet spacing pattern, wherein the pseudorandom code is a Costas array.