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FIBER-OPTIC SENSING TECHNOLOGY FOR RAIL-BUCKLING DETECTION.
| 题名： | FIBER-OPTIC SENSING TECHNOLOGY FOR RAIL-BUCKLING DETECTION. |
| 作者： | Signore-JM; Abel-Maksoud-MG; Dempsey-BJ |
| 关键词： | TRACK-BUCKLING; DETECTION-; FIBER-OPTICS; SENSITIVITY-; FIBER-TO-STEEL-BONDING; LABORATORY-TESTS; MEASUREMENTS-; ACCURACY-; BREAKING-; BENDING-; OPTICAL-FIBERS; DETECTORS- |
| 摘要： | Buckling and cracking of steel rails is a contributing factor in accidents on railroads today. Detection and notification of buckled track sections before a train reaches these locations will significantly increase rail safety. A fiber-optic-based sensing system, with the fiber affixed to a beam, was developed and evaluated to detect buckled regions. The purpose of this research is to evaluate the sensitivity of the fiber-optic sensing system to buckling of a long structural member. Numerous facets of fiber-optic sensing have been explored. Fiber-to-steel bonding techniques were examined and tested. Full-scale laboratory testing was conducted by elastically buckling a 24.4-m-long (80-ft-long) wide-flange section with hydraulic rams. Typical measurement accuracy within 10% of theoretical predictions was achieved by optical time domain reflectometry techniques. For field testing, however, a more robust solution is sought and is currently under development. It is suggested that a lower-cost fiber break or bend detector is a suitable option. The optical fiber will break or bend at the location of rail elongation in the buckled area, allowing the detection equipment to locate the buckled area. |
| 总页数： | Transportation Research Record. 1997. (1584) pp41-45 (9 Fig., 11 Ref.) |
| 报告类型： | 科技报告 |
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