Intelligent dowel bar with embedded distributed optical fibers and manufacturing method of intelligent dowel bar

The invention discloses an intelligent dowel bar embedded with distributed optical fibers and a manufacturing method of the intelligent dowel bar, and belongs to the technical field of road safety. Stress concentration is easily generated on a contact interface of the reinforcing steel bar of an existing dowel bar and concrete, as a result, the dowel bar is loosened and is difficult to transmit load effectively, and the working state of the dowel bar cannot be sensed. The invention just aims to solve the above problem. The intelligent dowel bar comprises an FRP sleeve, a cylindrical steel core, a distributed optical fiber, end sleeves and sealing glue layers. The FRP sleeve sleeves the cylindrical steel core, the middle section of the cylindrical steel core is engraved with a spiral groove, the distributed optical fiber is installed in the spiral groove, two ends of the cylindrical steel core are engraved with convex threads, the convex thread at one end is internally provided with an optical fiber lead groov