基于光纤传感的海缆振动信号录播技术研究及实现

Research and Implementation of Submarine Cable Vibration Signal Recording and Broadcasting Technology Based on Fiber Optic Sensor

通过对光纤传感技术进行研究分析,结合人耳可辨别的音频频率,提出一种海缆振动信号录播技术。在海缆振动信号可精准定位的基础上,以分布式光纤振动探测器为采集设备,通过敲击海缆外部任意位置点模拟入侵事件,首先将采集到的振动信号做降噪处理后,再将其解调为音频信号,最后对音频信号做谱减法降噪处理后将其播放。测试结果表明人耳可辨别音频内容,该技术为识别外界入侵事件类型提供新的方法与思路。

Through research and analysis of optical fiber sensing technology,combined with the audio frequency discernible by the human ear,a sub⁃marine cable vibration signal recording and broadcasting technology is proposed.Based on the accurate positioning of the submarine cable vibration signals,the distributed optical fiber vibration detector is used as a collection device,and the intrusion event is simulated by tap⁃ping any point outside the submarine cable.The collected vibration signals are first processed for noise reduction,and then demodulate it into an audio signal,and then perform spectral subtraction and noise reduction on the audio signal to play it.The test results show that the human ear can distinguish the audio content.This technology provides a new method and idea for identifying the type of external intrusion events.