According to test status of fiber Bragg grating（FBG） sensor system applied to a concrete piles project

the anti-hitting performance of the sensor system is evaluated.Due to experiments

the flange joints and nearby regions are mostly prone to damage

the data connecting cables are also easy to breakage

while the FBG sensors are the most difficult to destroy.According to results of experiment

the corresponding protection measures are adopted.The glue-felt

plastic pipe and twine are used to protect the FBG sensor system

and the effect of the protection approach is approved by the experiment.