分布式光纤振动传感系统大传感数据流时间周期压缩与传送技术

Data Reduction and Communication Technique for Distributed Optical Fiber Vibration Sensing System

针对分布式光纤振动传感系统的大传感数据流,提出一种时间周期压缩与传送技术,采用扰动脉冲特征值提取模块对扰动脉冲特征值进行同步提取,并将无关数据剔除,大大压缩了数据量;同时为了便于数据区分,采用复用的方法对特征值进行编码与成帧。实验结果表明,本文提出的数据压缩与传送方法能够有效的获取外界扰动事件的位置和强度信息,且当同一时间仅有一处扰动事件发生的情况下,本文的数据压缩率仅为0.96‰。相比于传统的数据传送方法,本文大大减少了传输的数据量,减轻了通信接口和上位机软件的负担,系统的传感灵敏度和响应速度都得到显著提高。

A method of big sensing data reduction and communication for distributed optical fiber vibration sensing system is proposed and implemented. Vibration pulse characteristic data are extracted synchronously to reduce the sensing data,and data coding and framing module is employed for data recognition of PC software. The experimen-tal results demonstrate that the method of this paper can obtain the position and intensity information of vibration events along the sensing fiber effectively. Besides,the compression ratio is only 0.96‰when there is one vibration event happening at the same time. Compared with traditional methods,the method of this paper reduces the sensing data volume greatly,which lightens the burden of communication interface and PC software,resulting in highly im-proved sensing sensitivity and response speed of the system.