Fiber optic strain monitoring for pipelines
The objective of this project was to demonstrate the feasibility of using fiber optic Bragg grating sensors (BGS) to measure axial and bending strain in pipes. Work was performed by McDermott Technology Inc. (MTI) and included BGS design and procurement. In addition to the pipe strain testing, a number of BGS evaluations were performed. Several methods were evaluated to protect and encapsulate the BGS, which are embedded inside an optical fiber, and strain transfer tests were performed on two of the encapsulation approaches. A high strain bending test to failure was performed on one BGS. A special test section was used to characterize the performance of the BGS and compare to standard electrical resistance foil strain gages. Two sets of pipe strain tests were performed. In the first test series, optical fiber was positioned along the pipe test section and embedded BGS were attached directly to the outside of the pipe wall. In the second tests series, the BGS were encapsulated inside a stainless steel tube which was attached to the outside of the pipe wall. All the tests were successfully completed, the data analyzed, and the results summarized in this report.
- Research Organization:
- Alliance Research Center, Research and Development Div., Alliance, OH (United States)
- Sponsoring Organization:
- American Gas Association, Inc., Arlington, VA (United States)
- OSTI ID:
- 325716
- Report Number(s):
- AGA-99001931; CNN: Contract PR-255-9616; TRN: AHC29910%%24
- Resource Relation:
- Other Information: PBD: 8 Apr 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Bare Fiber Bragg Gratings embedded into concrete buffer Supercontainer concept for nuclear waste storage [ANIMMA--2015-IO-337]
Embedded Active Fiber Optic Sensing Network for Structural Health Monitoring in Harsh Environments