Optical fiber sensor technique for strain measurement during materials deposition, chemical reaction, and relaxation
Laser light from a common source is split and conveyed through two similar optical fibers and emitted at their respective ends to form an interference pattern, one of the optical fibers having a portion thereof subjected to a strain. Changes in the strain cause changes in the optical path length of the strain fiber, and generate corresponding changes in the interference pattern. The interference pattern is received and transduced into signals representative of fringe shifts corresponding to changes in the strain experienced by the strained one of the optical fibers. These signals are then processed to evaluate strain as a function of time, typical examples of the application of the apparatus including electrodeposition of a metallic film on a conductive surface provided on the outside of the optical fiber being strained, so that strains generated in the optical fiber during the course of the electrodeposition are measurable as a function of time. In one aspect of the invention, signals relating to the fringe shift are stored for subsequent processing and analysis, whereas in another aspect of the invention the signals are processed for real-time display of the strain changes under study. 9 figs.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- DOE Contract Number:
- AC04-76DP00789
- Assignee:
- Dept. of Energy
- Patent Number(s):
- PATENTS-US-A7146621
- Application Number:
- ON: DE89010887
- OSTI ID:
- 6283793
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
CHEMICAL REACTIONS
STRAINS
ELECTRODEPOSITION
MEASURING INSTRUMENTS
DESIGN
RELAXATION
FIBER OPTICS
INTERFEROMETRY
INVENTIONS
OPTICAL FIBERS
PROCESS CONTROL
THIN FILMS
CONTROL
DEPOSITION
ELECTROLYSIS
FIBERS
FILMS
LYSIS
SURFACE COATING
440300* - Miscellaneous Instruments- (-1989)
360103 - Metals & Alloys- Mechanical Properties
360101 - Metals & Alloys- Preparation & Fabrication
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360603 - Materials- Properties
360601 - Other Materials- Preparation & Manufacture