摘要
针对海底电力电缆出现的故障,提出了采用基于布里渊散射分布式光纤传感器(DOFS)检测电力电缆内部温度及所受外力的方法。在对该技术原理分析的基础上,提出了一种光相干外差检测式BOTDR传感实验系统,通过检测布里渊散射光的频移特性和光强,从而实现了光纤的分布式温度和应变传感,系统简单,测量精度高。通过理论分析和实验证明了该技术能够有效地在线检测电力电缆所受外力和内部温度变化,为海底动力电缆的运行状态实时监测提供一种新技术方法。
Aimed at malfunction of marine electric power cables, a temperature and stress test method based on Brillouin scatting distributed optical fiber sensor （DOFS） is developed for electric power cable inspection. This heterodyne type BOTDR sensing experimental system detects the frequency shift characteristic and light intensity and realize the distributed temperature and stress sensing of optical fiber. The system is simple and highly precise. It is proved by theoretical analysis and experiments that this new technique is capable of effectively on-line detecting the stress and temperature of electric power cable.
出处
《船海工程》
2009年第3期133-136,144,共5页
Ship & Ocean Engineering
关键词
电力电缆
光纤传感
布里渊散射
光相干外差检测
温度
应变
监测
electric power cable
Brillouin scatting
optical coherent heterodyne detection
temperature
stress
monitor
