STRAIN SENSING DEVICE AND METHOD OF MEASURING STRAIN
First Claim
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1. A strain sensing device comprising:
- a sub-assembly;
at least one optical fiber within the sub-assembly;
a metallic coating which encases the sub-assembly, wherein the metallic coating is strain coupled to the sub-assembly.
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Abstract
A strain sensing device has a sub-assembly with at least one optical fiber therein, and a metallic coating encasing the sub-assembly. The metallic coating is strain coupled to the sub-assembly. A strain sensing system and a method of anticipating failure in a structure are provided. The strain sensing system and method of anticipating failure in a structure use the strain on the strain sensing device to calculate the strain on a structure of interest.
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Citations
22 Claims
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1. A strain sensing device comprising:
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a sub-assembly; at least one optical fiber within the sub-assembly; a metallic coating which encases the sub-assembly, wherein the metallic coating is strain coupled to the sub-assembly. - View Dependent Claims (2, 3, 4, 5, 6, 13, 14, 20, 21, 22)
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7. A strain sensing system comprising:
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a strain sensing device comprising, a sub-assembly; at least one optical fiber within the sub-assembly; a metallic coating which encases the sub-assembly, wherein the metallic coating is strain coupled to the sub-assembly; a structure of interest the strain of which is to be measured, wherein the strain sensing device is connected to said structure; and a strain measuring system which measures strain in the strain sensing device, wherein the measured strain on said strain sensing device is used in determining strain on said structure. - View Dependent Claims (8, 9, 10, 11, 12)
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15. A method of making a strain sensing device, comprising:
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arranging at least one fiber within a sub-assembly; and encasing the sub-assembly within a metallic coating, such that the metallic coating is strain coupled to the sub-assembly. - View Dependent Claims (16, 17)
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18. The method of 15, wherein an outer diameter of the sub-assembly is smaller than an inside diameter of the metallic coating, further comprising compressing the metallic coating onto the sub-assembly so as to translate strain from the metallic coating to the optical fiber.
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19. The method of 15, further comprising placing an expansion agent between the metallic coating and the least one optical fiber, and activating the expansion agent to strain couple the metallic coating to the at least one optical fiber.
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