光缆结构对相位敏感光时域反射仪传感性能的影响OA

To investigate the influence of optical cable structure on the sensing performance of phase-sensitive optical time-domain reflectometer(Φ-OTDR),four typical optical cables,namely glass fiber reinforced plastic(GFRP)single-core optical cable,spiral armored optical cable,steel wire armored optical cable,and stranded composite optical cable,were taken as re-search objects.The transfer process of strain between different layers of the optical cables was analyzed.Through numerical simulation and vibration experiments,the variation trends of vibration response characteristics of different optical cables with frequency and amplitude were studied.The experimental results show that the tight-buffered fiber of the stranded composite op-tical cable exhibits good sensing performance in both frequency response and amplitude response to vibration signals,while the steel wire armored optical cable and the GFRP single-core optical cable are insensitive to high-frequency signals.