Current sensors using magnetostrictive material
First Claim
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1. A current sensor device, comprising:
- a strain distribution converter;
an optical fiber having a plurality of modulations in refractive index, the plurality of modulations in refractive index being periodic modulations in an initial state without external excitation, and wherein a segment of the optical fiber is coupled with the strain distribution converter; and
an externally excitable magnetostrictive material associated with the strain distribution converter such that a change in shape of the magnetostrictive material under external excitation causes a change in length of the optical fiber that shifts the plurality of modulations in refractive index into aperiodic modulations,wherein the plurality of modulations in refractive index includes a first period, a second period, and a third period, the second period located between the first period and the third period, andwherein the first period and the second period are unequal and the second period and the third period are unequal as the length of the optical fiber changes.
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Abstract
A current sensor device. The current sensor device includes a strain distribution converter; an optical fiber coupled with the strain distribution converter; and a magnetostrictive material associated with the strain distribution converter such that a change in shape of the magnetostrictive material causes a change in length of the optical fiber.
23 Citations
27 Claims
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1. A current sensor device, comprising:
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a strain distribution converter; an optical fiber having a plurality of modulations in refractive index, the plurality of modulations in refractive index being periodic modulations in an initial state without external excitation, and wherein a segment of the optical fiber is coupled with the strain distribution converter; and an externally excitable magnetostrictive material associated with the strain distribution converter such that a change in shape of the magnetostrictive material under external excitation causes a change in length of the optical fiber that shifts the plurality of modulations in refractive index into aperiodic modulations, wherein the plurality of modulations in refractive index includes a first period, a second period, and a third period, the second period located between the first period and the third period, and wherein the first period and the second period are unequal and the second period and the third period are unequal as the length of the optical fiber changes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A current sensor device, comprising:
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a strain distribution converter; an optical fiber that is coupled with the strain distribution converter and that has a plurality of modulations in refractive index, the plurality of modulations in refractive index being periodic modulations in an initial state without external excitation; and an externally excitable magnetostrictive material associated with the strain distribution converter such that a change in shape of the magnetostrictive material under external excitation causes a change in shape of the strain distribution converter that shifts the plurality of modulations in refractive index into aperiodic modulations, wherein the plurality of modulations in refractive index includes a first period, a second period, and a third period, the second period located between the first period and the third period, and wherein the first period and the second period are unequal and the second period and the third period are unequal as the length of the optical fiber changes. - View Dependent Claims (24, 25, 26, 27)
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Specification