Fiber optic sensor array for multi-dimensional strain measurement
| Autor: | Barry G Grossmann, Li-Tien Huang |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Optical fiber
Materials science Strain (chemistry) business.industry Plane (geometry) Condensed Matter Physics Atomic and Molecular Physics and Optics law.invention Interferometry Planar Optics Sensor array Mechanics of Materials law Fiber optic sensor Signal Processing General Materials Science Electrical and Electronic Engineering business Strain gauge Civil and Structural Engineering |
| Zdroj: | Smart Materials and Structures. 7:159-165 |
| ISSN: | 1361-665X 0964-1726 |
| DOI: | 10.1088/0964-1726/7/2/003 |
| Popis: | A planar fiber optic strain sensor array (FOSSA) able to measure multi-dimensional strains inside a material has been developed and tested. Three-dimensional strain measurement is a developing technology that can eventually be employed for many applications including monitoring the strain field inside composite parts and structures, sensing for adaptive structures and intelligent vehicle highway systems and health monitoring systems for civil structures. A planar configuration was chosen to reduce the manufacturing difficulty and structural degradation of embedding optical sensors in more than one plane. Two extrinsic Fabry-Perot interferometric sensors (EFPIs) and one polarimetric sensor were used to form the planar sensor array. The two EFPIs extract two normal strain components along the x and y axes. A polarimetric sensor in the same plane was used to extract the third normal strain acting on the z axis. The sensor array was embedded in an epoxy resin block and a load of 1000 lbs was applied normal to one face with a loading machine. The strains extracted from the embedded optical fiber sensors compared well with strains measured with surface bonded electrical strain gages. The difference in measured strain between the electrical strain gages and the fiber optic sensors was typically less than 3.4% on all three principal strain axes. |
| Databáze: | OpenAIRE |
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