Fiber-Reinforced Polymer-Packaged Optical Fiber Bragg Grating Strain Sensors for Infrastructures under Harsh Environment

Figure 15

Properties of the FRP-packaged FBG strain sensors.

(a) Direct embedded GFRP-packaged FBG sensors

(b) Direct embedded CFRP-packaged FBG sensors

(c) GFRP-packaged FBG sensors with expanding ends

(d) Surface-welding GFRP-packaged FBG sensors

(e) Long gauge embedded GFRP-packaged FBG sensors

(f) Long gauge embedded GFRP-packaged FBG sensors