基于光纤光栅传感器的混凝土梁应变检测

介绍了一种基于光纤光栅传感原理的光纤应变传感器和其测量混凝土内部应变的原理。采用GSYD-B型光纤光栅应变测量仪，利用FBG对混凝土内部应变进行了测量。通过加载条件下与应变片对比试验，验证了光栅传感器具有良好的可靠性。结果表明，这种新型光纤传感器显示了良好的传感性能，能够监测混凝土内部应变状态，发挥出成活率高、绝对值测量和寿命长等优势。

Strain measuring in concrete beam with fiber bragg grating sensors

A fiber-optic sensor based on fiber bragg grating and its principle of detecting strain in concrete was briefly introduced. Internal strains in concrete beam were measured via embedded novel optical fiber sensors and with a grating strain measuring system. The comparison of the results with those obtained from strain-pieces demonstrated the reliability of bragg grating sensor in concrete. It showed such advantages as strong capability to survive, absolute value measurement and long service life over conventional electrical strain gauge.