Intensity Fiber-Optic Sensor for Structural Health Monitoring Calibrated by Impact Tester
2016; IEEE Sensors Council; Volume: 16; Issue: 9 Linguagem: Inglês
10.1109/jsen.2016.2524045
ISSN1558-1748
AutoresMiloš Petrović, Pedja Mihailović, Ljiljana Brajović, Slobodan Petričević, Irena Živković, Aleksandar Kojović, Vesna Radojević,
Tópico(s)Analytical Chemistry and Sensors
ResumoIn this paper, the use of intrinsic intensity fiber-optic sensors for structural health monitoring was investigated. Polyethylene-based composite samples with glass mat reinforcement and embedded telecommunication fibers were subjected to impact using high-speed puncture impact tester as a calibration device. Transfer function of the sensor was generated by linking the light intensity modulation depth with the impact force and the impact point to fiber distance. Conditions for transfer function validity were presented. To detect any possible dangerous impact, a net of crossed fibers was proposed and the net spacing for the given material was calculated. Appropriate non-damaging calibration procedure was proposed, as well as the algorithm for locating the impact point. The method for calculating the impact force, the projectile momentum change, and the place of impact was verified by consecutive strikes on the previously calibrated sample. The sensor can also provide information on the time of the impact and an alarm signal if the force exceeds the damaging threshold force..
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