Fiber optic sensors for intelligent multi-parameter monitoring of bridge cables and sensor protection technique
This paper introduces a new fiber optic sensor that can be directly implanted inside the cable structure and realize the simultaneous monitoring of cable temperature,humidity and strain.Femtosec-ond fiber grating non-destructive inscription technology is used to fabricate the sensing optical fiber grat-ing for cables,which greatly improves the durability of the sensor.A sensitized humidity sensor based on polyimide sleeve is developed to substantially improve the sensor measurement sensitivity.A double-layer fiber optic sensor encapsulation protection scheme based on spiral armoring and stainless-steel tube is proposed.The extracting process of optical sensing fiber from the anchor area of cable is studied,and a cable test study is carried out to verify the effectiveness of the cable monitoring multi-parameter fiber optic sensor developed in this paper in practical applications.
cablesstructural health monitoringintelligent cablefiber optic sensormulti-parametric sensing
万方数据
维普
