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| Study on Sensing Characteristics of Different Embedding Angles of Bragg Gratings in Composites |
| WANG Ben1, DUAN Yugang1, LI Jinjian1, GAO Kan2 |
( 1. State Key Lab for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
2. No. 23 Research Institute, China Electronic Technology Corporation Group, Shanghai 200437, China ) |
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Abstract Fiber Bragg grating (FBG) is proposed to embed in the composites to monitor the variation of strains and
temperature, however, the influence of embedment on the sensing performance is not clear in the current studies. In the process
of embedment, the angle between OF (optical fiber) and carbon fiber in the adjacent prepreg will generate the internal stress,
which affect the sensing performance. For the sake of the investigation on this influence, the composites embedded the varying
angle of OF is prepared and tested under the variation of strains and temperature to observe the influence on the sensing.
Obtained results indicated that the angle of OF will affect the sensing performance inculding strains and temperature. In the
inspection under the temperature, the degree of fitting for the sensing curve decreases with the increasing angle. Also, the deviation
of the data measured by OF and strain gauge increases with the angle, implying a bigger deviation.
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2017, 
