光纤光栅智能缆索在特大桥上的应用

Application of smart cables with fiber bragg grating sensors to super large bridge

在缆索内部布置特制的光纤光栅应变及温度传感器,通过外接光纤光栅解调仪获得光栅的中心波长变化,能够在线监测缆索整体的受力情况。在特大悬索桥主缆、吊索和主缆索股锚固区一体化布置光纤光栅应变及温度传感器,成功实现悬索桥缆索一体化联网技术运用,传感器成活率高,能够满足长期桥梁健康监测的要求,为我国实现智能桥梁奠定了研究基础。

To monitor overall force of cable online,a special fiber grating strain and temperature sensor is arranged inside cable,and center wave length change of grating is obtained by an external fiber grating demodulator.Fiber bragg grating strain and temperature sensors are integrated in anchoring area of main cable,sling and main cable strands of super suspension bridge,successfully realizing the application of integrated networking technology of suspension bridge cables.The sensor has high survival rate and can meet requirements of long-term bridge health monitoring,laying research foundation for realization of smart bridges.