基于BOTDA技术的电缆温度监测

由于海底电缆深埋海底,其运行状态的监测尤为重要。因此,提出基于光纤光时域反射（OTDR）的布里渊时域反射分析技术（BOTDA）的分布式光纤传感器对复合海缆进行温度监测。简单介绍了BOTDA技术的原理以及温度监测的实验。对实验测得数据进行数据拟合处理和分析。从实验的数据分析中得出基于BOTDA技术测量出电缆温度的变化趋势和实际温度变化趋势是基本吻合的。从而验证了该技术测温误差小、响应时间短、运行可靠且能实现长距离测量,可有效应用于电缆温度在线监测,为电缆导体温度的确定提供有效的参考依据。

Cable temperature monitoring based on BOTDA technology

As submarine cable buried in the deep sea,its operational status monitoring is particularly important.So,we simply introduce fiber-based optical time domain reflectometer（OTDR） of the Brillouin time domain reflection analysis（BOTDA） distributed fiber optic sensors for composite submarine cable for temperature monitoring.A brief introduction the principles of BOTDA technology and temperature monitoring experiment.The experimental data fit the measured data processing and analysis.From the analysis of experimental data obtained based on measured cable temperature BOTDA technology trends and the actual temperature trend is basically consistent.Experiment results show that the technology temperature measurement error is small,short response time,reliable and can achieve long-distance measurement.The technology can be effectively applied to the cable line monitoring,in order to determine the temperature of the cable conductor to provide effective reference.