US 5,475,774 A · Optical fiber sensor coil using reverse quadrupoles and method of winding same

Abstract

In a optical fiber coil arrangement for use in rotation sensors, for example, errors resulting from axial and/or radial time varying temperature gradients can be minimized or substantially eliminated by employing reverse quadrupoles for the sensor coil. One of the quadrupoles is wound in a + - - + winding configuration. However, the next adjacent quadrupole is wound in a - + + - winding configuration. This reverse quadrupole arrangement substantially eliminates radial time varying temperature gradient dependent errors and reduces axial time varying temperature gradient dependent errors. The axial time varying temperature gradient dependent errors can be substantially eliminated by winding a reverse octupole arrangement. Accordingly, a reverse octupole arrangement is wound with a + - - + - + + - - + + - + - - + winding configuration. Alternatively, the axial time varying temperature gradient dependent errors can be substantially eliminated by providing extra lengths of the "+" and "-" ends which are axially displaced so as to substantially eliminate this axial time varying temperature gradient dependent error.

Claims26

Dependent claims

A fiber optic coil having at least one octupole, said octupole being wound from an optical fiber having first and second ends, said octupole comprising:

a first layer of turns formed of said first end;
a second layer of turns formed of said second end, said second layer of turns overlying said first layer of turns;
a third layer of turns formed of said second end, said third layer of turns overlying said second layer of turns;
a fourth layer of turns formed of said first end, said fourth layer of turns overlying said third layer of turns;
a fifth layer of turns formed of said second end, said fifth layer of turns overlying said fourth layer of turns;
a sixth layer of turns formed of said first end, said sixth layer of turns overlying said fifth layer of turns;
a seventh layer of turns formed of said first end, said seventh layer of turns overlying said sixth layer of turns;
and,
an eighth layer of turns formed of said second end, said eighth layer of turns overlying said seventh layer of turns.

6 more elements

A fiber optic coil having at least two octupoles, said octupoles being wound from an optical fiber having first and second ends, said octupoles comprising:

a first layer of turns formed of said first end;
a second layer of turns formed of said second end, said second layer of turns overlying said first layer of turns;
a third layer of turns formed of said second end, said third layer of turns overlying said second layer of turns;
a fourth layer of turns formed of said first end, said fourth layer of turns overlying said third layer of turns;
a fifth layer of turns formed of said second end, said fifth layer of turns overlying said fourth layer of turns;
a sixth layer of turns formed of said first end, said sixth layer of turns overlying said fifth layer of turns;
a seventh layer of turns formed of said first end, said seventh layer of turns overlying said sixth layer of turns;
an eighth layer of turns formed of said second end, said eighth layer of turns overlying said seventh layer of turns;
a ninth layer of turns formed of said second end, said ninth layer of turns overlying said eighth layer of turns;
a tenth layer of turns formed of said first end, said tenth layer of turns overlying said ninth layer of turns;
an eleventh layer of turns formed of said first end, said eleventh layer of turns overlying said tenth layer of turns;
a twelfth layer of turns formed of said second end, said twelfth layer of turns overlying said eleventh layer of turns;
a thirteenth layer of turns formed of said first end, said thirteenth layer of turns overlying said twelfth layer of turns;
a fourteenth layer of turns formed of said second end, said fourteenth layer of turns overlying said thirteenth layer of turns;
a fifteenth layer of turns formed of said second end, said fifteenth layer of turns overlying said fourteenth layer of turns;
and,
a sixteenth layer of turns formed of said first end, said sixteenth layer of turns overlying said fifteenth layer of turns.

14 more elements

A coil wound from an optical fiber having first and second ends, said coil having an integer number of sections, each section comprising:

a first layer of turns formed of said first end;
a second layer of turns formed of said second end, said second layer of turns overlying said first layer of turns;
a third layer of turns formed of said second end, said third layer of turns overlying said second layer of turns;
a fourth layer of turns formed of said first end, said fourth layer of turns overlying said third layer of turns;
a fifth layer of turns formed of said second end, said fifth layer of turns overlying said fourth layer of turns;
a sixth layer of turns formed of said first end, said sixth layer of turns overlying said fifth layer of turns;
a seventh layer of turns formed of said first end, said seventh layer of turns overlying said sixth layer of turns;
and,
an eighth layer of turns formed of said second end, said eighth layer of turns overlying said seventh layer of turns.

6 more elements

A coil wound from an optical fiber having first and second ends and an intermediate portion, said coil having an integer number of sections, each section comprising:

a first layer of turns formed of said first end;
a second layer of turns formed of said second end, said second layer of turns overlying said first layer of turns;
a third layer of turns formed of said second end, said third layer of turns overlying said second layer of turns;
a fourth layer of turns formed of said first end, said fourth layer of turns overlying said third layer of turns;
a fifth layer of turns formed of said second end, said fifth layer of turns overlying said fourth layer of turns;
a sixth layer of turns formed of said first end, said sixth layer of turns overlying said fifth layer of turns;
a seventh layer of turns formed of said first end, said seventh layer of turns overlying said sixth layer of turns;
an eighth layer of turns formed of said second end, said eighth layer of turns overlying said seventh layer of turns;
a ninth layer of turns formed of said second end, said ninth layer of turns overlying said eighth layer of turns;
a tenth layer of turns formed of said first end, said tenth layer of turns overlying said ninth layer of turns;
an eleventh layer of turns formed of said first end, said eleventh layer of turns overlying said tenth layer of turns;
a twelfth layer of turns formed of said second end, said twelfth layer of turns overlying said eleventh layer of turns;
a thirteenth layer of turns formed of said first end, said thirteenth layer of turns overlying said twelfth layer of turns;
a fourteenth layer of turns formed of said second end, said fourteenth layer of turns overlying said thirteenth layer of turns;
a fifteenth layer of turns formed of said second end, said fifteenth layer of turns overlying said fourteenth layer of turns;
and,
a sixteenth layer of turns formed of said first end, said sixteenth layer of turns overlying said fifteenth layer of turns.

14 more elements

A method of winding an octupole for an optical coil from an optical fiber having first and second fiber ends, said coil having first and second coil ends, said method comprising:

(a) forming a first layer of turns by winding said first end of said fiber from said first coil end to said second coil end;
(b) forming a second layer of turns by winding said second end of said fiber from said first coil end to said second coil end;
(c) forming a third layer of turns by winding said second end of said fiber around said second layer from said second coil end to said first coil end;
(d) forming a fourth layer of turns by winding said first end of said fiber around said third layer from said second coil end to said first coil end;
(e) forming a fifth layer of turns by winding said second end of said fiber around said fourth layer from said first coil end to said second coil end;
(f) forming a sixth layer of turns by winding said first end of said fiber around said fifth layer from said first coil end to said second coil end;
(g) forming a seventh layer of turns by winding said first end of said fiber around said fifth layer from said second coil end to said first coil end;
and,
(h) forming an eighth layer of turns by winding said second end of said fiber around said seventh layer from said second coil end to said first coil end.

6 more elements

A method of winding a pair of adjacent octupoles for an optical coil from an optical fiber having first and second fiber ends, said coil having first and second coil ends, said method comprising:

(a) forming a first layer of turns winding said first end of said fiber from said first coil end to said second coil end;
(b) forming a second layer of turns by winding said second end of said fiber around said first layer from said first coil end to said second coil end;
(c) forming a third layer of turns by winding said second end of said fiber around said second layer from said second coil end to said first coil end;
(d) forming a fourth layer of turns by winding said first end of said fiber around said third layer from said second coil end to said first coil end;
(e) forming a fifth layer of turns by winding said second end of said fiber around said fourth layer from said first coil end to said second coil end;
(f) forming a sixth layer of turns by winding said first end of said fiber around said fifth layer from said first coil end to said second coil end;
(g) forming a seventh layer of turns by winding said first end of said fiber around said fifth layer from said second coil end to said first coil end;
(h) forming an eighth layer of turns by winding said second end of said fiber around said seventh layer from said second coil end to said first coil end;
(i) forming a ninth layer of turns by winding said second end of said fiber around said eighth layer from said first coil end to said second coil end;
(j) forming a tenth layer of turns by winding said first fiber end around said ninth layer from said first coil end to said second coil end;
(k) forming an eleventh layer of turns by winding said first fiber end around said tenth layer from said second coil end to said first coil end;
(1) forming a twelfth layer of turns by winding said second fiber end around said eleventh layer from said second coil end to said first coil end;
(m) forming a thirteenth layer of turns by winding said first fiber end around said twelfth layer from said first coil end to said second coil end;
(n) forming a fourteenth layer of turns by winding said second fiber end around said thirteenth layer from said first coil end to said second coil end;
(o) forming a fifteenth layer of turns by winding said second fiber end around said fourteenth layer from said second coil end to said first coil end;
and,
(p) forming a sixteenth layer of turns by winding said first fiber end around said fifteenth layer from said second coil end to said first coil end.

14 more elements

Dependencies are inferred from the claim text.

Optical fiber sensor coil using reverse quadrupoles and method of winding same

Life of this patent

Optical fiber sensor coil using reverse quadrupoles and method of winding same

Life of this patent

Abstract

Claims26