With the development of high speed railway traffic, the structure health monitoring for high-speed rail
is necessary due to the safety issue. Optical fiber sensing technology is one of the options to solve it. Stress vector
information is the important index to make more reasonable judgments about railway safety. However, information
sensed by lots of commercial optical sensors is scalar. According to the stress filed distribution of rail, this paper
proposes a new type of stress vector sensor based on optical fiber sensing cable (OFSC) with a symmetrical seven
optical fibers structure and analyzes the relations between angle resolution and distance between adjacent of optical
fibers through finite-element software (ANSYS) simulation. Through reasonable distance configuration, the angle
resolution of the OFSC can be improved, and thus stress vector information, including the stress magnitude and
the angle of stress, can be more accurately obtained. The simulation results are helpful to configure OFSC for
angle resolution improvement in actual practice, and increase the safety factor in high speed railway structure
health monitoring.
DENG Shungea (邓顺戈), MA Xina (马鑫), LI Xinwana,b,c* (李新碗)
. The Analysis of Angle Resolution of Stress Vector Sensor Based on Optical Fiber Sensing Cable for High Speed Railway Traffic[J]. Journal of Shanghai Jiaotong University(Science), 2018
, 23(1)
: 61
-65
.
DOI: 10.1007/s12204-018-1910-4
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